"""API schemas (Pydantic) for the Swedish calendar endpoint (röda dagar /
klämdagar).

Wire format for `GET /api/calendar/days` — serves both §3.4 (shading the
Kalender page) and §3.8 (the per-year red-days list in Settings) from one
endpoint. Kept separate from the service's dataclasses so the wire format can
evolve independently.
"""

from __future__ import annotations

from datetime import date

from pydantic import BaseModel, Field

from app.services.calendar_service import CalendarDay, CalendarWindow, DayType


class CalendarDayResponse(BaseModel):
    date: date
    name: str | None
    day_type: DayType
    is_override: bool
    override_is_working_day: bool | None
    is_free: bool

    @classmethod
    def from_domain(cls, day: CalendarDay) -> "CalendarDayResponse":
        return cls(
            date=day.date,
            name=day.name,
            day_type=day.day_type,
            is_override=day.is_override,
            override_is_working_day=day.override_is_working_day,
            is_free=day.is_free,
        )


class CalendarDaysResponse(BaseModel):
    """A `years`-year window of calendar days (max `MAX_WINDOW_YEARS`,
    currently 4), plus the full cached range so the UI can bound its
    pagination controls.
    """

    start_year: int
    end_year: int
    min_year: int | None = Field(
        default=None,
        description="First year covered by the cache, or None if the cache is missing.",
    )
    max_year: int | None = Field(
        default=None, description="Last year covered by the cache, or None if the cache is missing."
    )
    days: list[CalendarDayResponse]

    @classmethod
    def from_domain(cls, window: CalendarWindow) -> "CalendarDaysResponse":
        return cls(
            start_year=window.start_year,
            end_year=window.end_year,
            min_year=window.min_year,
            max_year=window.max_year,
            days=[CalendarDayResponse.from_domain(d) for d in window.days],
        )