"""Tests for the FK scraper: extractor, validation, and session state machine.

Three independent test concerns:

1. _extract_parental_leave — parses the FK #/valjdagar HTML fixture and
   produces a correct ParentalLeaveFetch.  No network, no BankID.

2. Validation helpers — out-of-bounds numbers raise rather than persist.

3. Session state machine — start/poll/cancel transitions, TTL auto-cancel,
   double-cancel safety.  Browser is mocked; no headless Chromium needed.
"""

from __future__ import annotations

import re
import uuid
from datetime import datetime
from pathlib import Path
from typing import Any
from unittest.mock import AsyncMock, MagicMock, patch

import pytest

from app.entities.parental_leave import ParentalLeaveFetch, TierData
from app.scrapers.fk_scraper import (
    FamilySummary,
    FKScraperService,
    PartnerDeduction,
    TransferableDays,
    _apply_transferable,
    _deduce_partner,
    _do_extract,
    _do_login,
    _extract_family_summary,
    _extract_transferable_days,
    _SEL,
    _SessionState,
    _set_status,
    _sessions,
)
from app.utils.errors import ValidationError

# ---------------------------------------------------------------------------
# Helpers for the HTML-fixture tests
# ---------------------------------------------------------------------------

FIXTURES_DIR = Path(__file__).parents[1] / "fixtures"


def _load_fixture(name: str) -> str:
    """Read a synthetic HTML fixture from tests/fixtures/.

    Fixtures here are hand-built (never real FK page captures — see F1 of
    the scraper/config/ops security audit) and always present in the repo.
    """
    return (FIXTURES_DIR / name).read_text(encoding="utf-8")


# ---------------------------------------------------------------------------
# Minimal mock of a Playwright Page that answers our CSS queries from HTML
# ---------------------------------------------------------------------------


def _make_mock_page(html: str):
    """
    Build a minimal async mock page that serves inner_text / all_inner_texts
    for the selectors used by _extract_parental_leave.

    Uses basic regex over the fixture HTML rather than a real browser — fast
    and dependency-free.
    """
    NIVA_SEL = "[data-test='forDig'] .visa-dagar__desktop .niva-statistik__dagar span"
    FAMILY_SEL = "[data-test='forDigOchAnnanForalder']"
    FAMILY_KVAR_SEL = FAMILY_SEL + " .visa-dagar__dagar-kvar"
    FAMILY_DISCRETE_SEL = FAMILY_SEL + " .visa-dagar__discrete"
    FAMILY_NIVA_SEL = FAMILY_SEL + " .visa-dagar__desktop .niva-statistik__dagar span"

    def _family_panel_present() -> bool:
        return 'data-test="forDigOchAnnanForalder"' in html

    def _family_kvar() -> str | None:
        m = re.search(
            r'data-test="forDigOchAnnanForalder".*?'
            r'class="visa-dagar__dagar-kvar">(\d+)<',
            html,
            re.DOTALL,
        )
        return m.group(1) if m else None

    def _family_discrete() -> str | None:
        m = re.search(
            r'data-test="forDigOchAnnanForalder".*?'
            r'class="visa-dagar__discrete">(.*?)<',
            html,
            re.DOTALL,
        )
        return m.group(1) if m else None

    def _family_niva_all_texts() -> list[str]:
        m_block = re.search(
            r'data-test="forDigOchAnnanForalder"(.*?)$',
            html,
            re.DOTALL,
        )
        block = m_block.group(1) if m_block else ""
        return re.findall(r"\(\d+ dagar\)", block)

    def _for_dig_kvar() -> str:
        m = re.search(
            r'data-test="forDig".*?'
            r'class="visa-dagar__dagar-kvar">(\d+)<',
            html,
            re.DOTALL,
        )
        if m:
            return m.group(1)
        raise ValueError("No forDig dagar-kvar found in fixture")

    def _for_dig_discrete() -> str:
        m = re.search(
            r'data-test="forDig".*?'
            r'class="visa-dagar__discrete">(.*?)<',
            html,
            re.DOTALL,
        )
        if m:
            return m.group(1)
        raise ValueError("No forDig discrete found in fixture")

    def _dubbeldag_kvar() -> str:
        m = re.search(
            r'data-test="dubbeldag".*?'
            r'class="visa-dagar__dagar-kvar">(\d+)<',
            html,
            re.DOTALL,
        )
        if m:
            return m.group(1)
        raise ValueError("No dubbeldag dagar-kvar found in fixture")

    def _niva_all_texts() -> list[str]:
        m_block = re.search(
            r'data-test="forDig"(.*?)data-test="footer"',
            html,
            re.DOTALL,
        )
        block = m_block.group(1) if m_block else ""
        desktop_m = re.search(r"visa-dagar__desktop(.*?)visa-dagar__mobile", block, re.DOTALL)
        target = desktop_m.group(1) if desktop_m else block
        return re.findall(r"\(\d+ dagar\)", target)

    page = MagicMock()

    def locator_factory(sel: str) -> MagicMock:
        loc = MagicMock()
        if sel == NIVA_SEL:
            loc.first.inner_text = AsyncMock(return_value="")
            loc.first.wait_for = AsyncMock()
            loc.all_inner_texts = AsyncMock(return_value=_niva_all_texts())
            loc.count = AsyncMock(return_value=len(_niva_all_texts()))
        elif sel == FAMILY_SEL:
            loc.count = AsyncMock(return_value=1 if _family_panel_present() else 0)
        elif sel == FAMILY_KVAR_SEL:
            val = _family_kvar()
            loc.count = AsyncMock(return_value=1 if val is not None else 0)
            loc.first.inner_text = AsyncMock(return_value=val or "")
        elif sel == FAMILY_DISCRETE_SEL:
            val = _family_discrete()
            loc.count = AsyncMock(return_value=1 if val is not None else 0)
            loc.first.inner_text = AsyncMock(return_value=val or "")
        elif sel == FAMILY_NIVA_SEL:
            texts = _family_niva_all_texts()
            loc.count = AsyncMock(return_value=len(texts))
            loc.all_inner_texts = AsyncMock(return_value=texts)
        elif "visa-dagar__dagar-kvar" in sel and "forDig" in sel:
            loc.first.inner_text = AsyncMock(return_value=_for_dig_kvar())
            loc.first.wait_for = AsyncMock()
            loc.all_inner_texts = AsyncMock(return_value=[])
            loc.count = AsyncMock(return_value=1)
        elif "visa-dagar__discrete" in sel and "forDig" in sel:
            loc.first.inner_text = AsyncMock(return_value=_for_dig_discrete())
            loc.first.wait_for = AsyncMock()
            loc.all_inner_texts = AsyncMock(return_value=[])
            loc.count = AsyncMock(return_value=1)
        elif "dubbeldag" in sel and "visa-dagar__dagar-kvar" in sel:
            loc.first.inner_text = AsyncMock(return_value=_dubbeldag_kvar())
            loc.first.wait_for = AsyncMock()
            loc.all_inner_texts = AsyncMock(return_value=[])
            loc.count = AsyncMock(return_value=1)
        else:
            loc.first.inner_text = AsyncMock(return_value="")
            loc.first.wait_for = AsyncMock()
            loc.all_inner_texts = AsyncMock(return_value=[])
            loc.count = AsyncMock(return_value=0)
        return loc

    page.locator.side_effect = locator_factory
    return page


# ---------------------------------------------------------------------------
# Extract from real HTML fixture
# ---------------------------------------------------------------------------

# Import the extractor directly (no browser needed)
from app.scrapers.fk_scraper import _extract_parental_leave  # noqa: E402


class TestExtractFromFixture:
    """Parse the synthetic overview HTML fixture and assert correct field values."""

    async def test_days_left_and_total_parsed(self) -> None:
        html = _load_fixture("fk_overview_synthetic.html")
        state = _SessionState(
            session_id="test-1",
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=uuid.uuid4(),
        )
        page = _make_mock_page(html)
        result = await _extract_parental_leave(page, state)
        # From the synthetic fixture: 100 av 240 dagar
        assert result.days_left == 100
        assert result.total_days == 240
        assert result.days_used == 140

    async def test_tier_values_parsed(self) -> None:
        html = _load_fixture("fk_overview_synthetic.html")
        state = _SessionState(
            session_id="test-2",
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=uuid.uuid4(),
        )
        page = _make_mock_page(html)
        result = await _extract_parental_leave(page, state)
        # From the synthetic fixture: sjukpenning 60, lägstanivå 40
        assert result.tier_data.sjukpenning_left == 60
        assert result.tier_data.lagsta_niva_left == 40

    async def test_dubbeldagar_parsed(self) -> None:
        html = _load_fixture("fk_overview_synthetic.html")
        state = _SessionState(
            session_id="test-3",
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=uuid.uuid4(),
        )
        page = _make_mock_page(html)
        result = await _extract_parental_leave(page, state)
        # From the synthetic fixture: 20 av 60 dubbeldagar
        assert result.dubbeldagar_left == 20

    async def test_source_is_scraped(self) -> None:
        html = _load_fixture("fk_overview_synthetic.html")
        state = _SessionState(
            session_id="test-4",
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=uuid.uuid4(),
        )
        page = _make_mock_page(html)
        result = await _extract_parental_leave(page, state)
        assert result.source == "scraped"

    async def test_reserved_days_derived(self) -> None:
        html = _load_fixture("fk_overview_synthetic.html")
        state = _SessionState(
            session_id="test-5",
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=uuid.uuid4(),
        )
        page = _make_mock_page(html)
        result = await _extract_parental_leave(page, state)
        # 140 days used < 150 transferable → all reserved days remain
        assert result.reserved_days_total == 90
        assert result.reserved_days_left == 90
        assert result.transferable_days_left == 240 - 90 - 140  # 10

    async def test_tier_totals_sum_to_total_days(self) -> None:
        html = _load_fixture("fk_overview_synthetic.html")
        state = _SessionState(
            session_id="test-6",
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=uuid.uuid4(),
        )
        page = _make_mock_page(html)
        result = await _extract_parental_leave(page, state)
        assert (
            result.tier_data.sjukpenning_total + result.tier_data.lagsta_niva_total
            == result.total_days
        )

    async def test_tier_used_nonnegative(self) -> None:
        html = _load_fixture("fk_overview_synthetic.html")
        state = _SessionState(
            session_id="test-7",
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=uuid.uuid4(),
        )
        page = _make_mock_page(html)
        result = await _extract_parental_leave(page, state)
        assert result.tier_data.sjukpenning_used >= 0
        assert result.tier_data.lagsta_niva_used >= 0


# ---------------------------------------------------------------------------
# Validation: bad numbers raise rather than persist
# ---------------------------------------------------------------------------


class TestValidation:
    """Feed impossible numbers and assert the extractor raises."""

    def _make_bad_page(
        self, days_left: int, total_days: int, sjukpenning: int, lagsta: int, dubbel: int
    ) -> Any:
        NIVA_SEL = "[data-test='forDig'] .visa-dagar__desktop .niva-statistik__dagar span"

        page = MagicMock()

        def locator_factory(sel: str) -> MagicMock:
            loc = MagicMock()
            if sel == NIVA_SEL:
                loc.first.inner_text = AsyncMock(return_value="")
                loc.first.wait_for = AsyncMock()
                loc.all_inner_texts = AsyncMock(
                    return_value=[f"({sjukpenning} dagar)", f"({lagsta} dagar)"]
                )
            elif "visa-dagar__dagar-kvar" in sel and "forDig" in sel:
                loc.first.inner_text = AsyncMock(return_value=str(days_left))
                loc.first.wait_for = AsyncMock()
                loc.all_inner_texts = AsyncMock(return_value=[])
            elif "visa-dagar__discrete" in sel and "forDig" in sel:
                loc.first.inner_text = AsyncMock(
                    return_value=f"av {total_days} dagar kvar efter ansökan"
                )
                loc.first.wait_for = AsyncMock()
                loc.all_inner_texts = AsyncMock(return_value=[])
            elif "dubbeldag" in sel:
                loc.first.inner_text = AsyncMock(return_value=str(dubbel))
                loc.first.wait_for = AsyncMock()
                loc.all_inner_texts = AsyncMock(return_value=[])
            else:
                loc.first.inner_text = AsyncMock(return_value="")
                loc.first.wait_for = AsyncMock()
                loc.all_inner_texts = AsyncMock(return_value=[])
            return loc

        page.locator.side_effect = locator_factory
        return page

    def _state(self) -> _SessionState:
        return _SessionState(
            session_id="val-test",
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=uuid.uuid4(),
        )

    async def test_negative_dubbeldagar_left_raises(self) -> None:
        """Regression coverage moved here from a "negative days_left" scenario.

        Derivation now lives in `app.services.leave_snapshot.build_snapshot`
        (see its module docstring), which derives `days_left` from the tier
        breakdown (`sjukpenning_left + lagsta_niva_left`) rather than the
        page's separate "För dig, dagar kvar" text — and that breakdown is
        parsed with a digits-only regex, so it can never itself go negative.
        `dubbeldagar_left` is still parsed with a plain `int()`, so it's the
        remaining reachable path to a negative-number guard here; the
        `days_left`/tier negative-value guards themselves are unit-tested
        directly against `build_snapshot` in `test_leave_snapshot.py`.
        `build_snapshot` raises `ValidationError` (a `DomainError`), not a
        bare `ValueError` like this function's own page-parsing code does.
        """
        page = self._make_bad_page(164, 240, 119, 45, -1)
        with pytest.raises(ValidationError, match="negative"):
            await _extract_parental_leave(page, self._state())

    async def test_total_days_parse_failure_raises(self) -> None:
        NIVA_SEL = "[data-test='forDig'] .visa-dagar__desktop .niva-statistik__dagar span"
        page = MagicMock()

        def locator_factory(sel: str) -> MagicMock:
            loc = MagicMock()
            if sel == NIVA_SEL:
                loc.first.inner_text = AsyncMock(return_value="")
                loc.first.wait_for = AsyncMock()
                loc.all_inner_texts = AsyncMock(return_value=["(80 dagar)", "(20 dagar)"])
            elif "dagar-kvar" in sel and "forDig" in sel:
                loc.first.inner_text = AsyncMock(return_value="100")
                loc.first.wait_for = AsyncMock()
                loc.all_inner_texts = AsyncMock(return_value=[])
            elif "discrete" in sel and "forDig" in sel:
                loc.first.inner_text = AsyncMock(return_value="INVALID TEXT")
                loc.first.wait_for = AsyncMock()
                loc.all_inner_texts = AsyncMock(return_value=[])
            elif "dubbeldag" in sel:
                loc.first.inner_text = AsyncMock(return_value="39")
                loc.first.wait_for = AsyncMock()
                loc.all_inner_texts = AsyncMock(return_value=[])
            else:
                loc.first.inner_text = AsyncMock(return_value="0")
                loc.first.wait_for = AsyncMock()
                loc.all_inner_texts = AsyncMock(return_value=[])
            return loc

        page.locator.side_effect = locator_factory
        with pytest.raises(ValueError, match="parse total days"):
            await _extract_parental_leave(page, self._state())

    async def test_fewer_than_two_niva_values_raises(self) -> None:
        NIVA_SEL = "[data-test='forDig'] .visa-dagar__desktop .niva-statistik__dagar span"
        page = MagicMock()

        def locator_factory(sel: str) -> MagicMock:
            loc = MagicMock()
            if sel == NIVA_SEL:
                loc.first.inner_text = AsyncMock(return_value="")
                loc.first.wait_for = AsyncMock()
                loc.all_inner_texts = AsyncMock(return_value=["(119 dagar)"])  # only one
            elif "dagar-kvar" in sel and "forDig" in sel:
                loc.first.inner_text = AsyncMock(return_value="164")
                loc.first.wait_for = AsyncMock()
                loc.all_inner_texts = AsyncMock(return_value=[])
            elif "discrete" in sel and "forDig" in sel:
                loc.first.inner_text = AsyncMock(return_value="av 240 dagar kvar efter ansökan")
                loc.first.wait_for = AsyncMock()
                loc.all_inner_texts = AsyncMock(return_value=[])
            elif "dubbeldag" in sel:
                loc.first.inner_text = AsyncMock(return_value="39")
                loc.first.wait_for = AsyncMock()
                loc.all_inner_texts = AsyncMock(return_value=[])
            else:
                loc.first.inner_text = AsyncMock(return_value="0")
                loc.first.wait_for = AsyncMock()
                loc.all_inner_texts = AsyncMock(return_value=[])
            return loc

        page.locator.side_effect = locator_factory
        with pytest.raises(ValueError, match="Expected 2 tier values"):
            await _extract_parental_leave(page, self._state())

    async def test_zero_total_days_raises(self) -> None:
        """Guard against placeholder zero data: total_days=0 is impossible and indicates hydration failure."""
        page = self._make_bad_page(164, 0, 119, 45, 39)
        with pytest.raises(ValueError, match="total_days=0.*had not hydrated"):
            await _extract_parental_leave(page, self._state())


# ---------------------------------------------------------------------------
# Family panel -> partner deduction
# ---------------------------------------------------------------------------

_NO_FAMILY_PANEL_HTML = """
<div data-test="forDig">
  <div class="visa-dagar" data-test="body">
    <span class="visa-dagar__dagar-kvar">100</span>
    <span class="visa-dagar__discrete">av 240 dagar kvar efter ansökan</span>
    <div class="visa-dagar__desktop">
      <span class="niva-statistik__dagar"><span>(60 dagar)</span></span>
      <span class="niva-statistik__dagar"><span>(40 dagar)</span></span>
    </div>
  </div>
  <div data-test="footer"></div>
</div>
<div class="visa-dagar" data-test="dubbeldag">
  <span class="visa-dagar__dagar-kvar">20</span>
</div>
"""

_FAMILY_PANEL_NO_TIERS_HTML = """
<div data-test="forDig">
  <div class="visa-dagar" data-test="body">
    <span class="visa-dagar__dagar-kvar">100</span>
    <span class="visa-dagar__discrete">av 240 dagar kvar efter ansökan</span>
    <div class="visa-dagar__desktop">
      <span class="niva-statistik__dagar"><span>(60 dagar)</span></span>
      <span class="niva-statistik__dagar"><span>(40 dagar)</span></span>
    </div>
  </div>
  <div data-test="footer"></div>
</div>
<div data-test="forDigOchAnnanForalder">
  <div class="visa-dagar" data-test="body">
    <span class="visa-dagar__dagar-kvar">250</span>
    <span class="visa-dagar__discrete">av 480 dagar kvar efter ansökan</span>
  </div>
</div>
<div class="visa-dagar" data-test="dubbeldag">
  <span class="visa-dagar__dagar-kvar">20</span>
</div>
"""


def _state() -> _SessionState:
    return _SessionState(
        session_id="family-test",
        workspace_id=uuid.uuid4(),
        personal_data_uuid=uuid.uuid4(),
        child_id=uuid.uuid4(),
        owner_user_id=uuid.uuid4(),
    )


class TestExtractFamilySummary:
    """`_extract_family_summary` parses the (assumed) family-panel DOM defensively."""

    async def test_family_summary_parsed_from_fixture(self) -> None:
        html = _load_fixture("fk_overview_synthetic.html")
        page = _make_mock_page(html)
        family = await _extract_family_summary(page, _state())

        assert family == FamilySummary(
            total_days=480, days_left=250, sjukpenning_left=190, lagsta_niva_left=60
        )

    async def test_absent_family_panel_returns_none(self) -> None:
        page = _make_mock_page(_NO_FAMILY_PANEL_HTML)
        family = await _extract_family_summary(page, _state())
        assert family is None

    async def test_absent_family_panel_does_not_affect_main_extraction(self) -> None:
        """The caller's own extraction must succeed exactly as without this feature."""
        page = _make_mock_page(_NO_FAMILY_PANEL_HTML)
        result = await _extract_parental_leave(page, _state())
        assert result.days_left == 100
        assert result.total_days == 240

    async def test_tierless_family_panel_returns_summary_with_none_tiers(self) -> None:
        page = _make_mock_page(_FAMILY_PANEL_NO_TIERS_HTML)
        family = await _extract_family_summary(page, _state())

        assert family == FamilySummary(
            total_days=480, days_left=250, sjukpenning_left=None, lagsta_niva_left=None
        )


class TestDeducePartner:
    """`_deduce_partner` derives the other parent's balance as family - mine."""

    def _mine(self, **overrides: object) -> ParentalLeaveFetch:
        now = datetime.now()
        base = dict(
            id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            workspace_id=uuid.uuid4(),
            child_id=uuid.uuid4(),
            source="scraped",
            fetched_at=now,
            total_days=240,
            days_used=140,
            days_left=100,
            reserved_days_total=90,
            reserved_days_left=90,
            transferable_days_left=10,
            dubbeldagar_left=20,
            tier_data=TierData(
                sjukpenning_total=195,
                sjukpenning_used=135,
                sjukpenning_left=60,
                lagsta_niva_total=45,
                lagsta_niva_used=5,
                lagsta_niva_left=40,
            ),
            created_at=now,
            updated_at=now,
        )
        base.update(overrides)
        return ParentalLeaveFetch(**base)

    def test_deduction_with_family_tiers_present(self) -> None:
        mine = self._mine()
        family = FamilySummary(
            total_days=480, days_left=250, sjukpenning_left=190, lagsta_niva_left=60
        )

        deduction = _deduce_partner(mine, family)

        assert deduction == PartnerDeduction(
            total_days=240,
            days_left=150,
            sjukpenning_left=130,
            lagsta_niva_left=20,
            dubbeldagar_left=20,
        )

    def test_deduction_falls_back_to_proportional_split_without_family_tiers(self) -> None:
        mine = self._mine()
        family = FamilySummary(
            total_days=480, days_left=250, sjukpenning_left=None, lagsta_niva_left=None
        )

        deduction = _deduce_partner(mine, family)

        # total=240, left=150; lagsta_share = 90*240 // 480 = 45
        assert deduction == PartnerDeduction(
            total_days=240,
            days_left=150,
            sjukpenning_left=105,
            lagsta_niva_left=45,
            dubbeldagar_left=20,
        )

    def test_family_left_below_mine_returns_none(self) -> None:
        """family.days_left < mine.days_left can only mean stale/inconsistent data."""
        mine = self._mine(total_days=240, days_left=200)
        family = FamilySummary(
            total_days=480, days_left=150, sjukpenning_left=None, lagsta_niva_left=None
        )

        assert _deduce_partner(mine, family) is None

    def test_family_total_not_greater_than_mine_returns_none(self) -> None:
        mine = self._mine(total_days=480)
        family = FamilySummary(
            total_days=480, days_left=300, sjukpenning_left=None, lagsta_niva_left=None
        )

        assert _deduce_partner(mine, family) is None

    def test_negative_tier_deduction_falls_back_to_proportional_split(self) -> None:
        """Family-level tiers that would go negative per-parent fall back rather
        than producing a nonsensical negative PartnerDeduction field."""
        mine = self._mine()
        # family.sjukpenning_left (50) < mine.sjukpenning_left (60) -> negative naive diff
        family = FamilySummary(
            total_days=480, days_left=150, sjukpenning_left=50, lagsta_niva_left=100
        )

        deduction = _deduce_partner(mine, family)

        assert deduction is not None
        assert deduction.sjukpenning_left >= 0
        assert deduction.lagsta_niva_left >= 0


# ---------------------------------------------------------------------------
# Transferable days ("Dagar ni kan föra över") -> min-foraldrapenning page
# ---------------------------------------------------------------------------

# Small balanced-<div> HTML toolkit for the mock page below. Regex alone
# (as `_make_mock_page` above uses) can't safely slice `.barn-sektion` or
# `.fora-over-group`, since they contain further nested <div>s (the tooltip,
# in particular) — a naive ".*?</div>" would stop at the first nested close.


def _balanced_div_slice(html: str, open_tag_start: int) -> str:
    """From the index of a '<div' opening tag, return that div's full outer
    HTML (opening tag through its matching closing tag), counting nested
    <div>/</div> pairs."""
    depth = 0
    for m in re.finditer(r"<div\b[^>]*>|</div\s*>", html[open_tag_start:], re.IGNORECASE):
        if m.group(0).lower().startswith("</div"):
            depth -= 1
            if depth == 0:
                return html[open_tag_start : open_tag_start + m.end()]
        else:
            depth += 1
    raise ValueError("unbalanced <div> in fixture")


def _find_divs_by_class(html: str, class_name: str) -> list[str]:
    """Balanced outer-HTML slices for every <div class="...class_name...">
    in document order (non-overlapping — resumes the search after each
    match's own closing tag, so nested divs of the same class, unused here,
    aren't double-counted)."""
    pattern = re.compile(rf'<div\b[^>]*\bclass="[^"]*\b{re.escape(class_name)}\b[^"]*"[^>]*>')
    results: list[str] = []
    pos = 0
    while True:
        m = pattern.search(html, pos)
        if not m:
            break
        sl = _balanced_div_slice(html, m.start())
        results.append(sl)
        pos = m.start() + len(sl)
    return results


def _find_barn_rubrik_text(section_html: str) -> str | None:
    idx = section_html.find("barn-rubrik")
    if idx == -1:
        return None
    m = re.search(r"<strong>(.*?)</strong>", section_html[idx:], re.DOTALL)
    return m.group(1).strip() if m else None


def _direct_child_p_texts(div_slice: str) -> list[str]:
    """Text of <p> elements that are direct children of div_slice's own root
    element — i.e. not nested inside any further <div> — mirroring
    Playwright's `:scope > p`."""
    open_m = re.match(r"<div\b[^>]*>", div_slice, re.IGNORECASE)
    inner = div_slice[open_m.end() : -len("</div>")]
    texts: list[str] = []
    depth = 0
    for m in re.finditer(r"<(/?)(div|p)\b[^>]*>", inner, re.IGNORECASE):
        closing = m.group(1) == "/"
        tag = m.group(2).lower()
        if tag == "div":
            depth += -1 if closing else 1
            continue
        if tag == "p" and not closing and depth == 0:
            end_m = re.search(r"</p\s*>", inner[m.end() :], re.IGNORECASE)
            if end_m:
                raw = inner[m.end() : m.end() + end_m.start()]
                texts.append(re.sub(r"<[^>]+>", "", raw).strip())
    return texts


def _make_min_fp_mock_page(html: str):
    """Build a minimal async mock Page for the min-foraldrapenning "Dagar ni
    kan föra över" panel selectors. Balanced-<div> slicing + regex over the
    fixture HTML, not a real browser — see `_find_divs_by_class` above.
    """
    min_fp_slices = _find_divs_by_class(html, "min-fp")
    min_fp_html = min_fp_slices[0] if min_fp_slices else ""
    barn_sektioner = _find_divs_by_class(min_fp_html, "barn-sektion") if min_fp_html else []

    def _make_group_locator(group_html: str) -> MagicMock:
        loc = MagicMock()

        def sub_locator(sel: str) -> MagicMock:
            if sel == _SEL.MINFP_LABEL:
                m = re.search(
                    r'<h4\b[^>]*class="[^"]*minfp-label[^"]*"[^>]*>(.*?)</h4>',
                    group_html,
                    re.DOTALL,
                )
                sub = MagicMock()
                sub.count = AsyncMock(return_value=1 if m else 0)
                if m:
                    text = re.sub(r"<[^>]+>", "", m.group(1)).strip()
                    sub.first.inner_text = AsyncMock(return_value=text)
                return sub
            if sel == ":scope > p":
                sub = MagicMock()
                sub.all_inner_texts = AsyncMock(return_value=_direct_child_p_texts(group_html))
                return sub
            raise AssertionError(f"unexpected selector on group locator: {sel!r}")

        loc.locator.side_effect = sub_locator
        return loc

    def _make_panel_locator(panel_html: str) -> MagicMock:
        loc = MagicMock()
        loc.count = AsyncMock(return_value=1)

        def sub_locator(sel: str) -> MagicMock:
            if sel == _SEL.EXPANDABLE_BUTTON:
                m = re.search(
                    r'<button\b[^>]*class="[^"]*expandable-paragraph__button[^"]*"[^>]*>',
                    panel_html,
                )
                sub = MagicMock()
                sub.count = AsyncMock(return_value=1 if m else 0)
                if m:
                    aria_m = re.search(r'aria-expanded="(true|false)"', m.group(0))
                    sub.first.get_attribute = AsyncMock(
                        return_value=aria_m.group(1) if aria_m else None
                    )
                    sub.first.click = AsyncMock()
                return sub
            if sel == _SEL.FORA_OVER_GROUP:
                groups = _find_divs_by_class(panel_html, "fora-over-group")
                sub = MagicMock()
                sub.count = AsyncMock(return_value=len(groups))
                sub.nth.side_effect = lambda i: _make_group_locator(groups[i])
                return sub
            raise AssertionError(f"unexpected selector on panel locator: {sel!r}")

        loc.locator.side_effect = sub_locator
        return loc

    def _make_section_locator(section_html: str) -> MagicMock:
        loc = MagicMock()

        def sub_locator(sel: str) -> MagicMock:
            if sel == _SEL.BARN_RUBRIK:
                text = _find_barn_rubrik_text(section_html)
                sub = MagicMock()
                sub.count = AsyncMock(return_value=1 if text is not None else 0)
                sub.first.inner_text = AsyncMock(return_value=text or "")
                return sub
            if sel == _SEL.PANEL_FORA_OVER_DAGAR:
                panels = _find_divs_by_class(section_html, "panel-fora-over-dagar")
                sub = MagicMock()
                sub.count = AsyncMock(return_value=len(panels))
                if panels:
                    panel_loc = _make_panel_locator(panels[0])
                    sub.locator.side_effect = panel_loc.locator.side_effect
                return sub
            raise AssertionError(f"unexpected selector on section locator: {sel!r}")

        loc.locator.side_effect = sub_locator
        return loc

    def _make_sections_root_locator() -> MagicMock:
        loc = MagicMock()
        loc.count = AsyncMock(return_value=len(barn_sektioner))
        if barn_sektioner:
            loc.first = _make_section_locator(barn_sektioner[0])
        loc.nth.side_effect = lambda i: _make_section_locator(barn_sektioner[i])
        return loc

    page = MagicMock()
    page.goto = AsyncMock()
    page.wait_for_selector = AsyncMock()
    page.wait_for_function = AsyncMock()

    def locator_factory(sel: str) -> MagicMock:
        if sel == _SEL.MIN_FP_BARN_SEKTION:
            return _make_sections_root_locator()
        raise AssertionError(f"unexpected top-level selector: {sel!r}")

    page.locator.side_effect = locator_factory
    return page


_MULTI_CHILD_MIN_FP_HTML = """
<div class="min-fp">
  <div class="barn-sektion">
    <div class="barn-header"><h2 class="barn-rubrik"><strong>Testbarn</strong></h2></div>
    <div class="panel-fora-over-dagar">
      <div class="fora-over-group">
        <h4 class="minfp-label">Du kan föra över</h4>
        <p>84 dagar på sjukpenningnivå</p>
        <p>45 dagar på lägstanivå</p>
      </div>
      <div class="fora-over-group">
        <h4 class="minfp-label">Annan förälder kan föra över</h4>
        <p>26 dagar på sjukpenningnivå</p>
        <p>45 dagar på lägstanivå</p>
      </div>
    </div>
  </div>
  <div class="barn-sektion">
    <div class="barn-header"><h2 class="barn-rubrik"><strong>Andrabarn</strong></h2></div>
    <div class="panel-fora-over-dagar">
      <div class="fora-over-group">
        <h4 class="minfp-label">Du kan föra över</h4>
        <p>10 dagar på sjukpenningnivå</p>
        <p>5 dagar på lägstanivå</p>
      </div>
    </div>
  </div>
</div>
"""

_SOLO_PARENT_MIN_FP_HTML = """
<div class="min-fp">
  <div class="barn-sektion">
    <div class="barn-header"><h2 class="barn-rubrik"><strong>Testbarn</strong></h2></div>
    <div class="panel-fora-over-dagar">
      <div class="fora-over-group">
        <h4 class="minfp-label">Du kan föra över</h4>
        <p>84 dagar på sjukpenningnivå</p>
        <p>45 dagar på lägstanivå</p>
      </div>
    </div>
  </div>
</div>
"""

_NO_TRANSFER_PANEL_MIN_FP_HTML = """
<div class="min-fp">
  <div class="barn-sektion">
    <div class="barn-header"><h2 class="barn-rubrik"><strong>Testbarn</strong></h2></div>
    <div class="some-other-panel"></div>
  </div>
</div>
"""

_INCOMPLETE_MINE_MIN_FP_HTML = """
<div class="min-fp">
  <div class="barn-sektion">
    <div class="barn-header"><h2 class="barn-rubrik"><strong>Testbarn</strong></h2></div>
    <div class="panel-fora-over-dagar">
      <div class="fora-over-group">
        <h4 class="minfp-label">Du kan föra över</h4>
        <p>84 dagar på sjukpenningnivå</p>
      </div>
    </div>
  </div>
</div>
"""


def _min_fp_state() -> _SessionState:
    return _SessionState(
        session_id="min-fp-test",
        workspace_id=uuid.uuid4(),
        personal_data_uuid=uuid.uuid4(),
        child_id=uuid.uuid4(),
        owner_user_id=uuid.uuid4(),
    )


class TestExtractTransferableDays:
    """`_extract_transferable_days` reads FK's own "Dagar ni kan föra över"
    figures off the min-foraldrapenning page — the fix for the bug where
    `transferable_days_left` could never be reconstructed from #/valjdagar
    alone (see facts.md: FK reports 129/71, the old derivation gave 49/0)."""

    async def test_both_groups_parsed_golden_regression(self) -> None:
        """Pinning regression: mine 84+45=129, partner 26+45=71 — the exact
        `facts.md` figures FK itself reports, which the old arithmetic
        derivation could never reproduce."""
        html = _load_fixture("fk_min_foraldrapenning_synthetic.html")
        page = _make_min_fp_mock_page(html)

        result = await _extract_transferable_days(page, _min_fp_state(), "Testbarn")

        assert result is not None
        assert result.mine_total == 129
        assert result.partner_total == 71

    async def test_tooltip_decoys_ignored(self) -> None:
        """The tooltip's decoy "45 dagar"/"90 dagar" text must not leak into
        `mine_sjukpenning`/`mine_lagsta_niva` via a non-scoped read."""
        html = _load_fixture("fk_min_foraldrapenning_synthetic.html")
        page = _make_min_fp_mock_page(html)

        result = await _extract_transferable_days(page, _min_fp_state(), "Testbarn")

        assert result is not None
        assert result.mine_sjukpenning == 84
        assert result.mine_lagsta_niva == 45

    async def test_collapsed_accordion_still_yields_correct_numbers(self) -> None:
        html = _load_fixture("fk_min_foraldrapenning_synthetic.html").replace(
            'aria-expanded="true"', 'aria-expanded="false"'
        )
        page = _make_min_fp_mock_page(html)

        result = await _extract_transferable_days(page, _min_fp_state(), "Testbarn")

        assert result is not None
        assert result.mine_total == 129
        assert result.partner_total == 71

    async def test_panel_absent_returns_none(self) -> None:
        page = _make_min_fp_mock_page(_NO_TRANSFER_PANEL_MIN_FP_HTML)

        result = await _extract_transferable_days(page, _min_fp_state(), "Testbarn")

        assert result is None

    async def test_single_section_used_without_name_match(self) -> None:
        """A single `.barn-sektion` is used as-is — no `child_name` needed."""
        page = _make_min_fp_mock_page(_SOLO_PARENT_MIN_FP_HTML)

        result = await _extract_transferable_days(page, _min_fp_state(), None)

        assert result is not None
        assert result.mine_total == 129

    async def test_multi_child_correct_section_chosen_by_name(self) -> None:
        page = _make_min_fp_mock_page(_MULTI_CHILD_MIN_FP_HTML)

        result = await _extract_transferable_days(page, _min_fp_state(), "Andrabarn")

        assert result is not None
        assert result.mine_sjukpenning == 10
        assert result.mine_lagsta_niva == 5

    async def test_multi_child_unmatched_name_returns_none(self) -> None:
        page = _make_min_fp_mock_page(_MULTI_CHILD_MIN_FP_HTML)

        result = await _extract_transferable_days(page, _min_fp_state(), "Okänt Barn")

        assert result is None

    async def test_multi_child_no_name_returns_none(self) -> None:
        """Never guess a section when there's more than one and no name to match."""
        page = _make_min_fp_mock_page(_MULTI_CHILD_MIN_FP_HTML)

        result = await _extract_transferable_days(page, _min_fp_state(), None)

        assert result is None

    async def test_solo_parent_partner_fields_none(self) -> None:
        page = _make_min_fp_mock_page(_SOLO_PARENT_MIN_FP_HTML)

        result = await _extract_transferable_days(page, _min_fp_state(), "Testbarn")

        assert result is not None
        assert result.partner_sjukpenning is None
        assert result.partner_lagsta_niva is None
        assert result.partner_total is None

    async def test_incomplete_mine_group_returns_none(self) -> None:
        page = _make_min_fp_mock_page(_INCOMPLETE_MINE_MIN_FP_HTML)

        result = await _extract_transferable_days(page, _min_fp_state(), "Testbarn")

        assert result is None

    async def test_exception_during_parse_returns_none(self) -> None:
        """Any unexpected failure (e.g. a locator raising) degrades to None
        rather than propagating — mirrors `_extract_family_summary`."""
        page = _make_min_fp_mock_page(_load_fixture("fk_min_foraldrapenning_synthetic.html"))
        page.wait_for_selector = AsyncMock(side_effect=RuntimeError("boom"))

        result = await _extract_transferable_days(page, _min_fp_state(), "Testbarn")

        assert result is None


class TestApplyTransferable:
    """`_apply_transferable` re-derives `data` with FK's own reported split."""

    def _mine(self, **overrides: object) -> ParentalLeaveFetch:
        now = datetime.now()
        base = dict(
            id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            workspace_id=uuid.uuid4(),
            child_id=uuid.uuid4(),
            source="scraped",
            fetched_at=now,
            total_days=240,
            days_used=140,
            days_left=100,
            reserved_days_total=90,
            reserved_days_left=90,
            transferable_days_left=10,
            dubbeldagar_left=20,
            tier_data=TierData(
                sjukpenning_total=195,
                sjukpenning_used=135,
                sjukpenning_left=60,
                lagsta_niva_total=45,
                lagsta_niva_used=5,
                lagsta_niva_left=40,
            ),
            created_at=now,
            updated_at=now,
        )
        base.update(overrides)
        return ParentalLeaveFetch(**base)

    def test_valid_transferable_updates_reserved_split(self) -> None:
        mine = self._mine()
        transferable = TransferableDays(mine_sjukpenning=50, mine_lagsta_niva=10)

        result = _apply_transferable(mine, transferable)

        assert result.transferable_days_left == 60
        assert result.reserved_days_left == 40  # days_left(100) - transferable(60)
        assert result.transferable_days_reported is True

    def test_implausible_transferable_returns_original_unchanged(self) -> None:
        """transferable_days_left > days_left is impossible — build_snapshot
        raises ValidationError (reserved_days_left would go negative), and
        the caller's original estimate must survive unchanged, never raise."""
        mine = self._mine()
        transferable = TransferableDays(mine_sjukpenning=500, mine_lagsta_niva=500)

        result = _apply_transferable(mine, transferable)

        assert result is mine


class TestDoExtractTransferableIntegration:
    """`_do_extract`'s new transferable-days block, end to end.

    `_mine`'s figures mirror `facts.md` exactly: days_left=94+45=139, and the
    old transferable-first derivation (no FK figure available) computes
    transferable_days_left=49 — the bug this feature fixes (FK itself
    reports 129). The family fixture below likewise mirrors facts.md's
    "210 av 480 dagar kvar totalt" / "Annan förälder: 71 dagar kvar".
    """

    _FAMILY_HTML = """
    <div data-test="forDigOchAnnanForalder">
      <div class="visa-dagar" data-test="body">
        <span class="visa-dagar__dagar-kvar">210</span>
        <span class="visa-dagar__discrete">av 480 dagar kvar efter ansökan</span>
        <div class="visa-dagar__desktop">
          <span class="niva-statistik__dagar"><span>(120 dagar)</span></span>
          <span class="niva-statistik__dagar"><span>(90 dagar)</span></span>
        </div>
      </div>
    </div>
    """

    def setup_method(self) -> None:
        _sessions.clear()

    def teardown_method(self) -> None:
        _sessions.clear()

    def _mine(self, **overrides: object) -> ParentalLeaveFetch:
        now = datetime.now()
        base = dict(
            id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            workspace_id=uuid.uuid4(),
            child_id=uuid.uuid4(),
            source="scraped",
            fetched_at=now,
            total_days=240,
            days_used=101,
            days_left=139,
            reserved_days_total=90,
            reserved_days_left=90,
            transferable_days_left=49,
            dubbeldagar_left=39,
            tier_data=TierData(
                sjukpenning_total=195,
                sjukpenning_used=101,
                sjukpenning_left=94,
                lagsta_niva_total=45,
                lagsta_niva_used=0,
                lagsta_niva_left=45,
            ),
            created_at=now,
            updated_at=now,
        )
        base.update(overrides)
        return ParentalLeaveFetch(**base)

    async def _run(
        self,
        mine: ParentalLeaveFetch,
        min_fp_html: str,
        family_html: str = "",
        child_name: str | None = "Testbarn",
    ) -> _SessionState:
        sid = str(uuid.uuid4())
        state = _SessionState(
            session_id=sid,
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=uuid.uuid4(),
            child_name=child_name,
        )
        _sessions[sid] = state

        min_fp_page = _make_min_fp_mock_page(min_fp_html)
        family_page = _make_mock_page(family_html)

        page = MagicMock()
        page.wait_for_selector = AsyncMock()
        page.wait_for_function = AsyncMock()
        page.goto = min_fp_page.goto

        def locator_factory(sel: str) -> MagicMock:
            if sel == _SEL.MIN_FP_BARN_SEKTION:
                return min_fp_page.locator(sel)
            if sel.startswith(_SEL.FAMILY):
                return family_page.locator(sel)
            loc = MagicMock()
            loc.first.click = AsyncMock()
            loc.count = AsyncMock(return_value=0)
            return loc

        page.locator.side_effect = locator_factory

        with patch(
            "app.scrapers.fk_scraper._extract_parental_leave", new_callable=AsyncMock
        ) as mock_extract:
            mock_extract.return_value = mine
            await _do_extract(page, state)

        return state

    async def test_transferable_days_applied_to_result(self) -> None:
        """Golden regression via `_do_extract`: the persisted result carries
        FK's own 129, not the old broken derivation's 49."""
        mine = self._mine()
        state = await self._run(mine, _load_fixture("fk_min_foraldrapenning_synthetic.html"))

        assert state.status == "done"
        assert state.result is not None
        assert state.result.transferable_days_left == 129
        assert state.result.reserved_days_left == 10  # 139 - 129

    async def test_partner_deduction_picks_up_transferable_days(self) -> None:
        mine = self._mine()
        state = await self._run(
            mine,
            _load_fixture("fk_min_foraldrapenning_synthetic.html"),
            family_html=self._FAMILY_HTML,
        )

        assert state.partner_deduction is not None
        assert state.partner_deduction.days_left == 71
        assert state.partner_deduction.transferable_days_left == 71

    async def test_exception_in_block_leaves_data_untouched(self) -> None:
        """Mirrors `test_absent_family_panel_does_not_affect_main_extraction`:
        a failure in the new block must never affect the caller's own,
        already-validated `data`."""
        mine = self._mine()
        with patch(
            "app.scrapers.fk_scraper._extract_transferable_days",
            new_callable=AsyncMock,
            side_effect=RuntimeError("boom"),
        ):
            state = await self._run(mine, _load_fixture("fk_min_foraldrapenning_synthetic.html"))

        assert state.status == "done"
        assert state.result is mine
        assert state.result.transferable_days_left == 49  # unchanged from the original estimate


# ---------------------------------------------------------------------------
# Maintenance detection — client-facing message must not echo scraped text
# ---------------------------------------------------------------------------


class TestMaintenanceDetection:
    """R3: `_do_login`'s maintenance branch must return a fixed message —
    never the scraped FK banner text — to the poll client."""

    async def test_maintenance_banner_text_not_leaked_to_client(self) -> None:
        sid = str(uuid.uuid4())
        state = _SessionState(
            session_id=sid,
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=uuid.uuid4(),
        )

        page = MagicMock()
        page.goto = AsyncMock()
        page.url = "https://www.forsakringskassan.se/privatperson/logga-in"

        sensitive_banner = (
            "Planerat underhall pagar for personer med personnummer som slutar pa "
            "1-5, tjansten ar otillganglig till kl 23."
        )
        with patch(
            "app.scrapers.fk_scraper._check_maintenance", new_callable=AsyncMock
        ) as mock_check:
            mock_check.return_value = sensitive_banner
            await _do_login(page, state)

        assert state.status == "error"
        assert state.message is not None
        assert sensitive_banner not in state.message
        assert "maintenance" in state.message.lower()


# ---------------------------------------------------------------------------
# Session state machine
# ---------------------------------------------------------------------------


class TestSessionStateMachine:
    """Session transitions, TTL watchdog, and double-cancel safety."""

    def setup_method(self) -> None:
        _sessions.clear()

    def teardown_method(self) -> None:
        _sessions.clear()

    async def test_start_session_creates_entry(self) -> None:
        service = FKScraperService()
        owner_user_id = uuid.uuid4()
        with patch("app.scrapers.fk_scraper._run_session", new_callable=AsyncMock) as mock_run:
            mock_run.return_value = None
            sid = await service.start_session(
                workspace_id=uuid.uuid4(),
                personal_data_uuid=uuid.uuid4(),
                child_id=uuid.uuid4(),
                owner_user_id=owner_user_id,
            )
        assert sid in _sessions
        assert _sessions[sid].status == "launching"
        assert _sessions[sid].owner_user_id == owner_user_id

    async def test_poll_unknown_session_returns_error(self) -> None:
        service = FKScraperService()
        result = await service.poll_session("nonexistent", uuid.uuid4())
        assert result["status"] == "error"
        assert "Unknown" in result["message"]

    async def test_poll_done_includes_partner_deduction_when_present(self) -> None:
        service = FKScraperService()
        sid = str(uuid.uuid4())
        owner_user_id = uuid.uuid4()
        now = datetime.now()
        result_fetch = ParentalLeaveFetch(
            id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            workspace_id=uuid.uuid4(),
            child_id=uuid.uuid4(),
            source="scraped",
            fetched_at=now,
            total_days=240,
            days_used=140,
            days_left=100,
            reserved_days_total=90,
            reserved_days_left=90,
            transferable_days_left=10,
            dubbeldagar_left=20,
            tier_data=TierData(195, 135, 60, 45, 5, 40),
            created_at=now,
            updated_at=now,
        )
        deduction = PartnerDeduction(
            total_days=240,
            days_left=150,
            sjukpenning_left=130,
            lagsta_niva_left=20,
            dubbeldagar_left=20,
        )
        state = _SessionState(
            session_id=sid,
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=owner_user_id,
            status="done",
            result=result_fetch,
            partner_deduction=deduction,
        )
        _sessions[sid] = state

        result = await service.poll_session(sid, owner_user_id)

        assert result["status"] == "done"
        assert result["partner_deduction"] == {
            "total_days": 240,
            "days_left": 150,
            "sjukpenning_left": 130,
            "lagsta_niva_left": 20,
            "dubbeldagar_left": 20,
            "transferable_days_left": None,
        }

    async def test_poll_done_partner_deduction_is_none_when_absent(self) -> None:
        service = FKScraperService()
        sid = str(uuid.uuid4())
        owner_user_id = uuid.uuid4()
        now = datetime.now()
        result_fetch = ParentalLeaveFetch(
            id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            workspace_id=uuid.uuid4(),
            child_id=uuid.uuid4(),
            source="scraped",
            fetched_at=now,
            total_days=480,
            days_used=0,
            days_left=480,
            reserved_days_total=90,
            reserved_days_left=90,
            transferable_days_left=390,
            dubbeldagar_left=60,
            tier_data=TierData(390, 0, 390, 90, 0, 90),
            created_at=now,
            updated_at=now,
        )
        state = _SessionState(
            session_id=sid,
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=owner_user_id,
            status="done",
            result=result_fetch,
            partner_deduction=None,
        )
        _sessions[sid] = state

        result = await service.poll_session(sid, owner_user_id)

        assert result["status"] == "done"
        assert result["partner_deduction"] is None

    async def test_poll_awaiting_scan_returns_qr_data(self) -> None:
        service = FKScraperService()
        sid = str(uuid.uuid4())
        owner_user_id = uuid.uuid4()
        state = _SessionState(
            session_id=sid,
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=owner_user_id,
            status="awaiting_scan",
            qr_data=b"PNG_BYTES",
        )
        _sessions[sid] = state

        result = await service.poll_session(sid, owner_user_id)
        assert result["status"] == "awaiting_scan"
        assert "qr_data" in result
        import base64

        assert base64.b64decode(result["qr_data"]) == b"PNG_BYTES"

    async def test_poll_with_wrong_owner_is_treated_as_unknown_session(self) -> None:
        """F4 (T1 authz audit): a session_id known to a caller who did not
        start it must behave EXACTLY like a made-up session_id — never leak
        that the session exists (no QR data, no distinct error)."""
        service = FKScraperService()
        sid = str(uuid.uuid4())
        state = _SessionState(
            session_id=sid,
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=uuid.uuid4(),
            status="awaiting_scan",
            qr_data=b"PNG_BYTES",
        )
        _sessions[sid] = state

        result = await service.poll_session(sid, uuid.uuid4())  # different owner
        assert result == {"status": "error", "message": "Unknown session_id"}

    async def test_cancel_sets_status(self) -> None:
        service = FKScraperService()
        sid = str(uuid.uuid4())
        owner_user_id = uuid.uuid4()
        state = _SessionState(
            session_id=sid,
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=owner_user_id,
            status="awaiting_scan",
        )
        _sessions[sid] = state

        await service.cancel_session(sid, owner_user_id)
        assert _sessions[sid].status == "cancelled"

    async def test_cancel_clears_qr_data(self) -> None:
        """F5: cancelling a session must not leave the last QR frame in RAM."""
        service = FKScraperService()
        sid = str(uuid.uuid4())
        owner_user_id = uuid.uuid4()
        state = _SessionState(
            session_id=sid,
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=owner_user_id,
            status="awaiting_scan",
            qr_data=b"PNG_BYTES",
        )
        _sessions[sid] = state

        await service.cancel_session(sid, owner_user_id)
        assert _sessions[sid].qr_data is None

    async def test_cancel_with_wrong_owner_is_a_no_op(self) -> None:
        """F4: cancelling with the wrong owner must not affect the session —
        exactly like cancelling an unknown session_id."""
        service = FKScraperService()
        sid = str(uuid.uuid4())
        state = _SessionState(
            session_id=sid,
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=uuid.uuid4(),
            status="awaiting_scan",
        )
        _sessions[sid] = state

        await service.cancel_session(sid, uuid.uuid4())  # different owner
        assert _sessions[sid].status == "awaiting_scan"

    async def test_cancel_nonexistent_session_is_safe(self) -> None:
        service = FKScraperService()
        await service.cancel_session("does-not-exist", uuid.uuid4())  # should not raise

    async def test_ttl_watchdog_cancels_stale_session(self) -> None:
        from app.scrapers.fk_scraper import _ttl_watchdog

        with patch("app.scrapers.fk_scraper.settings") as mock_settings:
            mock_settings.scraper_session_ttl_seconds = 0  # immediate
            sid = str(uuid.uuid4())
            state = _SessionState(
                session_id=sid,
                workspace_id=uuid.uuid4(),
                personal_data_uuid=uuid.uuid4(),
                child_id=uuid.uuid4(),
                owner_user_id=uuid.uuid4(),
                status="awaiting_scan",
            )
            _sessions[sid] = state

            await _ttl_watchdog(sid)

            assert _sessions[sid].status == "error"
            assert "timed out" in (_sessions[sid].message or "")

    async def test_ttl_watchdog_purges_already_terminal_session(self) -> None:
        """F5: if the session already finished by the time the watchdog
        fires, it's a safety net that purges it immediately rather than
        leaving it for `_purge_later`."""
        from app.scrapers.fk_scraper import _ttl_watchdog

        with patch("app.scrapers.fk_scraper.settings") as mock_settings:
            mock_settings.scraper_session_ttl_seconds = 0  # immediate
            sid = str(uuid.uuid4())
            state = _SessionState(
                session_id=sid,
                workspace_id=uuid.uuid4(),
                personal_data_uuid=uuid.uuid4(),
                child_id=uuid.uuid4(),
                owner_user_id=uuid.uuid4(),
                status="done",
            )
            _sessions[sid] = state

            await _ttl_watchdog(sid)

            assert sid not in _sessions

    async def test_purge_later_removes_session_after_retention_window(self) -> None:
        """F5: a finished session is removed from `_sessions` after
        `scraper_result_retention_seconds`."""
        from app.scrapers.fk_scraper import _purge_later

        with patch("app.scrapers.fk_scraper.settings") as mock_settings:
            mock_settings.scraper_result_retention_seconds = 0  # immediate
            sid = str(uuid.uuid4())
            state = _SessionState(
                session_id=sid,
                workspace_id=uuid.uuid4(),
                personal_data_uuid=uuid.uuid4(),
                child_id=uuid.uuid4(),
                owner_user_id=uuid.uuid4(),
                status="done",
                result=None,
            )
            _sessions[sid] = state

            await _purge_later(sid)

            assert sid not in _sessions

    async def test_purge_later_is_a_no_op_if_already_purged(self) -> None:
        from app.scrapers.fk_scraper import _purge_later

        with patch("app.scrapers.fk_scraper.settings") as mock_settings:
            mock_settings.scraper_result_retention_seconds = 0
            await _purge_later("does-not-exist")  # should not raise

    async def test_start_session_cancels_existing_session_for_same_owner(self) -> None:
        """F5: at most one live session per owner — starting a new one
        cancels any non-terminal session already in flight for that owner."""
        service = FKScraperService()
        owner_user_id = uuid.uuid4()
        with patch("app.scrapers.fk_scraper._run_session", new_callable=AsyncMock):
            first_sid = await service.start_session(
                workspace_id=uuid.uuid4(),
                personal_data_uuid=uuid.uuid4(),
                child_id=uuid.uuid4(),
                owner_user_id=owner_user_id,
            )
            _sessions[first_sid].status = "awaiting_scan"

            second_sid = await service.start_session(
                workspace_id=uuid.uuid4(),
                personal_data_uuid=uuid.uuid4(),
                child_id=uuid.uuid4(),
                owner_user_id=owner_user_id,
            )

        assert _sessions[first_sid].status == "cancelled"
        assert _sessions[second_sid].status == "launching"
        assert first_sid != second_sid

    async def test_start_session_does_not_cancel_other_owners_session(self) -> None:
        service = FKScraperService()
        owner_a = uuid.uuid4()
        owner_b = uuid.uuid4()
        with patch("app.scrapers.fk_scraper._run_session", new_callable=AsyncMock):
            sid_a = await service.start_session(
                workspace_id=uuid.uuid4(),
                personal_data_uuid=uuid.uuid4(),
                child_id=uuid.uuid4(),
                owner_user_id=owner_a,
            )
            _sessions[sid_a].status = "awaiting_scan"

            await service.start_session(
                workspace_id=uuid.uuid4(),
                personal_data_uuid=uuid.uuid4(),
                child_id=uuid.uuid4(),
                owner_user_id=owner_b,
            )

        assert _sessions[sid_a].status == "awaiting_scan"

    async def test_set_status_updates_message(self) -> None:
        sid = str(uuid.uuid4())
        state = _SessionState(
            session_id=sid,
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=uuid.uuid4(),
        )
        _set_status(state, "error", "Something went wrong")
        assert state.status == "error"
        assert state.message == "Something went wrong"

    async def test_do_extract_calls_persist_callback_on_success(self) -> None:
        """_do_extract invokes the persist_callback with the extracted result."""
        persisted: list[ParentalLeaveFetch] = []

        async def mock_persist(fetch: ParentalLeaveFetch, partner: PartnerDeduction | None) -> None:
            persisted.append(fetch)

        now = datetime.now()
        expected = ParentalLeaveFetch(
            id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            workspace_id=uuid.uuid4(),
            child_id=uuid.uuid4(),
            source="scraped",
            fetched_at=now,
            total_days=240,
            days_used=76,
            days_left=164,
            reserved_days_total=90,
            reserved_days_left=90,
            transferable_days_left=74,
            dubbeldagar_left=39,
            tier_data=TierData(
                sjukpenning_total=195,
                sjukpenning_used=76,
                sjukpenning_left=119,
                lagsta_niva_total=45,
                lagsta_niva_used=0,
                lagsta_niva_left=45,
            ),
            created_at=now,
            updated_at=now,
        )

        sid = str(uuid.uuid4())
        state = _SessionState(
            session_id=sid,
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=uuid.uuid4(),
            persist_callback=mock_persist,
        )
        _sessions[sid] = state

        page = MagicMock()
        page.wait_for_selector = AsyncMock()
        page.wait_for_function = AsyncMock()

        def locator_factory(sel: str) -> MagicMock:
            loc = MagicMock()
            loc.first.click = AsyncMock()
            return loc

        page.locator.side_effect = locator_factory

        with patch(
            "app.scrapers.fk_scraper._extract_parental_leave", new_callable=AsyncMock
        ) as mock_extract:
            mock_extract.return_value = expected
            await _do_extract(page, state)

        assert state.status == "done"
        assert state.result is expected
        assert len(persisted) == 1
        assert persisted[0] is expected

    async def test_do_extract_sets_error_when_persist_callback_fails(self) -> None:
        """_do_extract sets status=error if the persist_callback raises."""

        async def failing_persist(
            fetch: ParentalLeaveFetch, partner: PartnerDeduction | None
        ) -> None:
            raise RuntimeError("DB unavailable")

        now = datetime.now()
        dummy = ParentalLeaveFetch(
            id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            workspace_id=uuid.uuid4(),
            child_id=uuid.uuid4(),
            source="scraped",
            fetched_at=now,
            total_days=240,
            days_used=0,
            days_left=240,
            reserved_days_total=90,
            reserved_days_left=90,
            transferable_days_left=150,
            dubbeldagar_left=60,
            tier_data=TierData(195, 0, 195, 45, 0, 45),
            created_at=now,
            updated_at=now,
        )

        sid = str(uuid.uuid4())
        state = _SessionState(
            session_id=sid,
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=uuid.uuid4(),
            persist_callback=failing_persist,
        )
        _sessions[sid] = state

        page = MagicMock()
        page.wait_for_selector = AsyncMock()
        page.wait_for_function = AsyncMock()

        def locator_factory(sel: str) -> MagicMock:
            loc = MagicMock()
            loc.first.click = AsyncMock()
            return loc

        page.locator.side_effect = locator_factory

        with patch(
            "app.scrapers.fk_scraper._extract_parental_leave", new_callable=AsyncMock
        ) as mock_extract:
            mock_extract.return_value = dummy
            await _do_extract(page, state)

        assert state.status == "error"
        assert "persist" in (state.message or "").lower()
        # R2/R3: the raw exception text must never reach the poll client.
        assert "DB unavailable" not in (state.message or "")

    async def test_do_extract_waits_for_hydration_before_extracting(self) -> None:
        """_do_extract calls wait_for_function to ensure data hydrates before extraction."""
        now = datetime.now()
        expected = ParentalLeaveFetch(
            id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            workspace_id=uuid.uuid4(),
            child_id=uuid.uuid4(),
            source="scraped",
            fetched_at=now,
            total_days=240,
            days_used=0,
            days_left=240,
            reserved_days_total=90,
            reserved_days_left=90,
            transferable_days_left=150,
            dubbeldagar_left=60,
            tier_data=TierData(195, 0, 195, 45, 0, 45),
            created_at=now,
            updated_at=now,
        )

        sid = str(uuid.uuid4())
        state = _SessionState(
            session_id=sid,
            workspace_id=uuid.uuid4(),
            personal_data_uuid=uuid.uuid4(),
            child_id=uuid.uuid4(),
            owner_user_id=uuid.uuid4(),
        )
        _sessions[sid] = state

        page = MagicMock()
        page.wait_for_selector = AsyncMock()
        page.wait_for_function = AsyncMock()

        def locator_factory(sel: str) -> MagicMock:
            loc = MagicMock()
            loc.first.click = AsyncMock()
            return loc

        page.locator.side_effect = locator_factory

        with patch(
            "app.scrapers.fk_scraper._extract_parental_leave", new_callable=AsyncMock
        ) as mock_extract:
            mock_extract.return_value = expected
            await _do_extract(page, state)

        # Verify wait_for_function was called with the correct selector
        page.wait_for_function.assert_called_once()
        call_args = page.wait_for_function.call_args
        assert call_args[1]["arg"] == "[data-test='forDig'] .visa-dagar__discrete"
        assert call_args[1]["timeout"] == 30_000


# ---------------------------------------------------------------------------
# F3: debug artifacts are opt-in (contain personal data when written)
# ---------------------------------------------------------------------------


class TestSaveDebugArtifacts:
    def _make_page(self) -> MagicMock:
        async def _fake_screenshot(path: str, full_page: bool = True) -> None:
            # Real Playwright writes the PNG to `path` itself; mirror that so
            # the "both files got written" assertion is meaningful.
            Path(path).write_bytes(b"fake-png-bytes")

        page = MagicMock()
        page.content = AsyncMock(return_value="<html>fake</html>")
        page.screenshot = AsyncMock(side_effect=_fake_screenshot)
        return page

    async def test_noop_when_debug_disabled_even_with_dir_set(self, tmp_path) -> None:
        from app.scrapers.fk_scraper import _save_debug_artifacts

        with patch("app.scrapers.fk_scraper.settings") as mock_settings:
            mock_settings.scraper_debug_dir = str(tmp_path)
            mock_settings.scraper_debug_enabled = False

            await _save_debug_artifacts(self._make_page(), "sid-1", ["[log] hi"])

        assert list(tmp_path.iterdir()) == []

    async def test_noop_when_dir_unset_even_if_enabled(self, tmp_path) -> None:
        from app.scrapers.fk_scraper import _save_debug_artifacts

        with patch("app.scrapers.fk_scraper.settings") as mock_settings:
            mock_settings.scraper_debug_dir = None
            mock_settings.scraper_debug_enabled = True

            await _save_debug_artifacts(self._make_page(), "sid-2", ["[log] hi"])

        assert list(tmp_path.iterdir()) == []

    async def test_writes_artifacts_when_both_enabled_and_dir_set(self, tmp_path) -> None:
        from app.scrapers.fk_scraper import _save_debug_artifacts

        with patch("app.scrapers.fk_scraper.settings") as mock_settings:
            mock_settings.scraper_debug_dir = str(tmp_path)
            mock_settings.scraper_debug_enabled = True

            await _save_debug_artifacts(self._make_page(), "sid-3", ["[log] hi"])

        written = {p.name for p in tmp_path.iterdir()}
        assert written == {"sid-3.html", "sid-3.png", "sid-3.console.txt"}


# ---------------------------------------------------------------------------
# Persistence integration: real SQLite repo round-trip
# ---------------------------------------------------------------------------


class TestPersistenceIntegration:
    """Run _do_extract with a real SQLiteParentalLeaveRepository and verify the row."""

    def setup_method(self) -> None:
        _sessions.clear()

    def teardown_method(self) -> None:
        _sessions.clear()

    async def test_scraped_row_is_readable_after_session_done(
        self, parental_leave_repo, seeded_ids
    ) -> None:
        """After _do_extract completes, repo.get_latest_by_parent returns the scraped row."""

        async def persist_callback(
            fetch: ParentalLeaveFetch, partner: PartnerDeduction | None
        ) -> None:
            await parental_leave_repo.create(fetch)

        now = datetime.now()
        scraped = ParentalLeaveFetch(
            id=uuid.uuid4(),
            personal_data_uuid=seeded_ids.personal_data_uuid,
            workspace_id=seeded_ids.workspace_id,
            child_id=seeded_ids.child_id,
            source="scraped",
            fetched_at=now,
            total_days=240,
            days_used=76,
            days_left=164,
            reserved_days_total=90,
            reserved_days_left=90,
            transferable_days_left=74,
            dubbeldagar_left=39,
            tier_data=TierData(195, 76, 119, 45, 0, 45),
            created_at=now,
            updated_at=now,
        )

        sid = str(uuid.uuid4())
        state = _SessionState(
            session_id=sid,
            workspace_id=seeded_ids.workspace_id,
            personal_data_uuid=seeded_ids.personal_data_uuid,
            child_id=seeded_ids.child_id,
            owner_user_id=uuid.uuid4(),
            persist_callback=persist_callback,
        )
        _sessions[sid] = state

        page = MagicMock()
        page.wait_for_selector = AsyncMock()
        page.wait_for_function = AsyncMock()

        def locator_factory(sel: str) -> MagicMock:
            loc = MagicMock()
            loc.first.click = AsyncMock()
            return loc

        page.locator.side_effect = locator_factory

        with patch(
            "app.scrapers.fk_scraper._extract_parental_leave", new_callable=AsyncMock
        ) as mock_extract:
            mock_extract.return_value = scraped
            await _do_extract(page, state)

        assert state.status == "done"

        result = await parental_leave_repo.get_latest_by_parent(
            seeded_ids.personal_data_uuid, seeded_ids.child_id
        )
        assert result is not None
        assert result.source == "scraped"
        assert result.days_left == 164
        assert result.total_days == 240