"""Domain entity: ParentalLeaveFetch.

Represents a snapshot of a parent's Försäkringskassan data — either scraped via
the headless-browser flow or entered manually. The `source` field records the
provenance so the UI can display freshness information ("Manually entered on …").

tier_data is stored as a JSON string in the DB and should be decoded on load.
"""

from dataclasses import dataclass, field
from datetime import datetime
from uuid import UUID


@dataclass
class TierData:
    """Breakdown of days by compensation tier."""

    sjukpenning_total: int
    sjukpenning_used: int
    sjukpenning_left: int
    lagsta_niva_total: int
    lagsta_niva_used: int
    lagsta_niva_left: int


@dataclass
class ParentalLeaveFetch:
    id: UUID
    personal_data_uuid: UUID
    workspace_id: UUID
    child_id: UUID
    source: str  # 'scraped' | 'manual' | 'deduced'
    fetched_at: datetime
    total_days: int
    days_used: int
    days_left: int
    reserved_days_total: int
    reserved_days_left: int
    transferable_days_left: int
    dubbeldagar_left: int
    tier_data: TierData
    created_at: datetime | None = field(default=None)
    updated_at: datetime | None = field(default=None)
    # True when `transferable_days_left` is FK's own reported figure (parsed
    # from the "Dagar ni kan föra över" panel); False when it was derived by
    # `app.services.leave_snapshot.build_snapshot`'s transferable-first
    # fallback, including when only `reserved_days_left` was supplied.
    transferable_days_reported: bool = field(default=False)