"""Proves a `DayAssertion` is honoured by `sync_plan` exactly as the legacy

signals it replaces — restructure step 3
(`~/.claude/plans/please-make-a-plan-cheerful-beacon.md.restructure`):

- a pinned day (`PlannedLeaveDay.is_pinned=True`) -> §`TestAssertionActsLikeAPin`.
- a `PlannedDayExclusion` row -> §`TestAssertionActsLikeAnExclusion`.

Both tests deliberately avoid the LEGACY signal they're replacing (no
`is_pinned=True` on the row in the pin test, no `planned_day_exclusion` row in
the exclusion test) so the assertion is proven to work on its own, not merely
alongside a fallback that would have produced the same result anyway. Reuses
the exact scenarios from `test_planning_service_sync.py::
TestSyncNeverOverwritesAPinnedDay` and `test_planned_day_exclusion.py::
TestExclusionSurvivesSync` so the equivalence is provable rather than
freshly invented.
"""

from datetime import date, datetime
from uuid import uuid4

from app.entities.day_assertion import DayAssertion
from app.entities.leave_wish import LeaveWish
from app.entities.planned_leave import PlannedLeaveDay
from app.entities.vacation_days import VacationDays
from app.repositories_impl.sqlite.day_assertion_repository import SQLiteDayAssertionRepository
from app.repositories_impl.sqlite.leave_wish_repository import SQLiteLeaveWishRepository
from app.repositories_impl.sqlite.planned_leave_repository import SQLitePlannedLeaveRepository
from app.repositories_impl.sqlite.vacation_days_repository import SQLiteVacationDaysRepository
from app.services.day_assertion_service import DayAssertionService
from app.services.leave_wish_service import LeaveWishService
from app.services.planning_service import PlanningService
from tests.conftest import SeededIds

_DAY = date(2027, 2, 3)  # a Wednesday inside the wish window below


def _make_wish(seeded: SeededIds) -> LeaveWish:
    """A fixed, one-week February 2027 window — same shape as the reference
    scenarios in test_planning_service_sync.py / test_planned_day_exclusion.py.
    """
    return LeaveWish(
        id=uuid4(),
        workspace_id=seeded.workspace_id,
        child_id=seeded.child_id,
        name="Sportlov",
        window_start_month=2,
        window_start_day=1,
        window_end_month=2,
        window_end_day=7,
        target_weeks=1,
        first_year=2027,
        last_year=None,
        priority=1,
        parent_mode="either",
        parent_personal_data_uuid=None,
        window_mode="fixed",
        created_at=datetime.now(),
        updated_at=datetime.now(),
    )


class TestAssertionActsLikeAPin:
    async def test_a_concrete_assertion_alone_freezes_the_day_like_is_pinned_would(
        self,
        planning_service: PlanningService,
        planned_leave_repo: SQLitePlannedLeaveRepository,
        day_assertion_repo: SQLiteDayAssertionRepository,
        vacation_repo: SQLiteVacationDaysRepository,
        leave_wish_repo: SQLiteLeaveWishRepository,
        seeded_ids: SeededIds,
    ) -> None:
        ws, child, parent = (
            seeded_ids.workspace_id,
            seeded_ids.child_id,
            seeded_ids.personal_data_uuid,
        )
        # No vacation budget this year -> tier-3 falls through to FP,
        # sjukpenning preferred -- so a freshly-funded interior day in this
        # window would be 'sjukpenning', never 'lagsta' (see
        # TestSyncNeverOverwritesAPinnedDay, the scenario this mirrors).
        await vacation_repo.create(
            VacationDays(
                id=uuid4(), personal_data_uuid=parent, workspace_id=ws, year=2027, total_days=0
            )
        )
        wish = await leave_wish_repo.create(_make_wish(seeded_ids))

        # The row is deliberately NOT `is_pinned=True` and NOT ad-hoc
        # (`wish_id` points at the real wish) -- under pre-step-3 rules this
        # row is exactly the kind `only_pinned_existing` would hide and
        # `sync_plan` would freely retype. Only the DayAssertion below should
        # be what keeps it frozen.
        row = await planned_leave_repo.create(
            PlannedLeaveDay(
                id=uuid4(),
                workspace_id=ws,
                child_id=child,
                parent_personal_data_uuid=parent,
                date=_DAY,
                day_type="lagsta",  # deliberately NOT what a fresh plan would pick
                wish_id=wish.id,
                created_at=datetime.now(),
                updated_at=datetime.now(),
            )
        )
        await day_assertion_repo.create(
            DayAssertion(
                id=uuid4(),
                workspace_id=ws,
                child_id=child,
                parent_personal_data_uuid=parent,
                date=_DAY,
                day_type="lagsta",
                wish_id=wish.id,
                created_at=datetime.now(),
                updated_at=datetime.now(),
            )
        )

        result = await planning_service.sync_plan(ws, today=date(2027, 1, 1))

        assert result.apply_result.accepted is True
        rows = await planned_leave_repo.list_by_workspace_child(ws, child)
        frozen = next(r for r in rows if r.date == _DAY)
        assert frozen.id == row.id
        assert frozen.day_type == "lagsta"

        # Every OTHER day in the window was free to be funded normally.
        other_days = [r for r in rows if r.date != _DAY]
        assert other_days, "expected the rest of the window to be funded"
        assert all(r.day_type == "sjukpenning" for r in other_days)

        # The frozen date never shows up as a changed slot.
        assert all(c.date != _DAY for c in result.changes)


class TestAssertionActsLikeAnExclusion:
    async def test_a_none_assertion_alone_keeps_the_day_out_with_no_exclusion_row(
        self,
        planning_service: PlanningService,
        planned_leave_repo: SQLitePlannedLeaveRepository,
        day_assertion_repo: SQLiteDayAssertionRepository,
        leave_wish_repo: SQLiteLeaveWishRepository,
        seeded_ids: SeededIds,
    ) -> None:
        ws, child, parent = (
            seeded_ids.workspace_id,
            seeded_ids.child_id,
            seeded_ids.personal_data_uuid,
        )
        await leave_wish_repo.create(_make_wish(seeded_ids))

        first = await planning_service.sync_plan(ws, today=date(2027, 1, 1))
        assert first.apply_result.accepted is True
        rows = await planned_leave_repo.list_by_workspace_child(ws, child)
        assert _DAY in {r.date for r in rows}, "the planner should place the day to begin with"

        # No `PlannedDayExclusion` row anywhere -- only a raw DayAssertion.
        await day_assertion_repo.create(
            DayAssertion(
                id=uuid4(),
                workspace_id=ws,
                child_id=child,
                parent_personal_data_uuid=parent,
                date=_DAY,
                day_type="none",
                created_at=datetime.now(),
                updated_at=datetime.now(),
            )
        )

        second = await planning_service.sync_plan(ws, today=date(2027, 1, 1))
        assert second.apply_result.accepted is True, second.apply_result.rejections
        rows = await planned_leave_repo.list_by_workspace_child(ws, child)
        assert _DAY not in {r.date for r in rows}
        # The rest of the week is still planned — only the one day went.
        assert {date(2027, 2, 1), date(2027, 2, 2), date(2027, 2, 4), date(2027, 2, 5)} <= {
            r.date for r in rows
        }
        # Not a reported eviction: this is a deliberate removal, not a lost
        # priority race — see `_Ledger._excluded_window_dates`'s docstring.
        assert not any(c.evicted for c in second.changes)

    async def test_clearing_the_exclusion_puts_the_day_back(
        self,
        planning_service: PlanningService,
        planned_leave_repo: SQLitePlannedLeaveRepository,
        day_assertion_repo: SQLiteDayAssertionRepository,
        leave_wish_repo: SQLiteLeaveWishRepository,
        seeded_ids: SeededIds,
    ) -> None:
        """There must be a way back — this is what the undo toast calls.

        Ported from the deleted `test_planned_day_exclusion.py::
        TestExclusionSurvivesSync.test_un_excluding_puts_the_day_back`, now
        exercised through `DayAssertionService.clear` instead of the deleted
        `PlannedDayExclusionService.delete`.
        """
        ws, child, parent = (
            seeded_ids.workspace_id,
            seeded_ids.child_id,
            seeded_ids.personal_data_uuid,
        )
        await leave_wish_repo.create(_make_wish(seeded_ids))
        await planning_service.sync_plan(ws, today=date(2027, 1, 1))

        service = DayAssertionService(day_assertion_repo, planned_leave_repo=planned_leave_repo)
        await service.assert_day(ws, child, parent, _DAY, day_type="none")
        await planning_service.sync_plan(ws, today=date(2027, 1, 1))
        rows = await planned_leave_repo.list_by_workspace_child(ws, child)
        assert _DAY not in {r.date for r in rows}

        await service.clear(ws, child, parent, _DAY)
        await planning_service.sync_plan(ws, today=date(2027, 1, 1))

        rows = await planned_leave_repo.list_by_workspace_child(ws, child)
        assert _DAY in {r.date for r in rows}


class TestWishDeleteClearsAssertions:
    """Restructure step 3b — deleting a wish must not strand a permanently

    locked slot behind. `LeaveWishService.delete()` clears the `DayAssertion`
    at each deleted row's key (see that method's docstring for why this is
    unconditional for a concrete assertion): otherwise the assertion
    survives with no `planned_leave_day` row behind it (invisible to the
    frontend, which only ever lists assertions via the rows/exclusions it
    already knows about) while still silently pinning whatever a later sync
    or hand-pin tries to place at that same (workspace, child, parent, date).
    """

    async def test_delete_clears_the_assertion_and_the_date_is_placeable_again(
        self,
        planning_service: PlanningService,
        leave_wish_service: LeaveWishService,
        planned_leave_repo: SQLitePlannedLeaveRepository,
        day_assertion_repo: SQLiteDayAssertionRepository,
        leave_wish_repo: SQLiteLeaveWishRepository,
        seeded_ids: SeededIds,
    ) -> None:
        ws, child, parent = (
            seeded_ids.workspace_id,
            seeded_ids.child_id,
            seeded_ids.personal_data_uuid,
        )
        wish = await leave_wish_repo.create(_make_wish(seeded_ids))

        # A locked/promoted day: a `planned_leave_day` row plus the
        # `DayAssertion` that pins it, both attributed to `wish` — exactly
        # what `PlanningService._assert_pin` produces for an 'attach'/'pin'
        # day-lock action.
        row = await planned_leave_repo.create(
            PlannedLeaveDay(
                id=uuid4(),
                workspace_id=ws,
                child_id=child,
                parent_personal_data_uuid=parent,
                date=_DAY,
                day_type="vacation",
                wish_id=wish.id,
                created_at=datetime.now(),
                updated_at=datetime.now(),
            )
        )
        await day_assertion_repo.create(
            DayAssertion(
                id=uuid4(),
                workspace_id=ws,
                child_id=child,
                parent_personal_data_uuid=parent,
                date=_DAY,
                day_type="vacation",
                wish_id=wish.id,
                created_at=datetime.now(),
                updated_at=datetime.now(),
            )
        )

        await leave_wish_service.delete(wish.id)

        assert await day_assertion_repo.get_by_natural_key(ws, child, parent, _DAY) is None
        assert await planned_leave_repo.get_by_id(row.id) is None

        # A fresh wish covering the same date must be able to place a day
        # there — nothing left invisibly pinning the slot.
        new_wish = await leave_wish_repo.create(_make_wish(seeded_ids))
        result = await planning_service.sync_plan(ws, today=date(2027, 1, 1))
        assert result.apply_result.accepted is True, result.apply_result.rejections

        rows = await planned_leave_repo.list_by_workspace_child(ws, child)
        placed = next((r for r in rows if r.date == _DAY), None)
        assert placed is not None, "the freed date must be placeable again by a later sync"
        assert placed.wish_id == new_wish.id

    async def test_delete_leaves_a_none_exclusion_untouched(
        self,
        leave_wish_service: LeaveWishService,
        planned_leave_repo: SQLitePlannedLeaveRepository,
        day_assertion_repo: SQLiteDayAssertionRepository,
        leave_wish_repo: SQLiteLeaveWishRepository,
        seeded_ids: SeededIds,
    ) -> None:
        """An exclusion (`day_type='none'`) is a standing "never place leave

        here" instruction about the DATE, not about one period — it must
        outlive the wish it happens to share a key with (matching the
        restructure notes' already-accepted "exclusions outlive the wish
        they were made against" behaviour). No current write path actually
        produces a `'none'` assertion with a `wish_id` set (a
        `planned_leave_day` row's `day_type` CHECK constraint never allows
        `'none'`, so 'attach'/'pin' can never assert one) — this proves the
        defensive exception in `LeaveWishService._clear_assertions_for`
        anyway, in case a future caller does.
        """
        ws, child, parent = (
            seeded_ids.workspace_id,
            seeded_ids.child_id,
            seeded_ids.personal_data_uuid,
        )
        wish = await leave_wish_repo.create(_make_wish(seeded_ids))
        row = await planned_leave_repo.create(
            PlannedLeaveDay(
                id=uuid4(),
                workspace_id=ws,
                child_id=child,
                parent_personal_data_uuid=parent,
                date=_DAY,
                day_type="vacation",
                wish_id=wish.id,
                created_at=datetime.now(),
                updated_at=datetime.now(),
            )
        )
        await day_assertion_repo.create(
            DayAssertion(
                id=uuid4(),
                workspace_id=ws,
                child_id=child,
                parent_personal_data_uuid=parent,
                date=_DAY,
                day_type="none",
                wish_id=wish.id,
                created_at=datetime.now(),
                updated_at=datetime.now(),
            )
        )

        await leave_wish_service.delete(wish.id)

        assert await planned_leave_repo.get_by_id(row.id) is None
        survivor = await day_assertion_repo.get_by_natural_key(ws, child, parent, _DAY)
        assert survivor is not None
        assert survivor.day_type == "none"