"""Shared Pydantic models for Schedule API payloads."""

from __future__ import annotations

from typing import Literal, Optional

from pydantic import BaseModel, Field, model_validator


class SchedulePayload(BaseModel):
    schedule_kind: Literal["interval", "weekdays"] = "interval"
    interval_days: int = Field(default=1, gt=0)
    weekday_mask: int = Field(default=0, ge=0, le=127)
    pause_until: Optional[str] = Field(default=None, description="ISO date YYYY-MM-DD")

    @model_validator(mode="after")
    def validate_kind(self) -> "SchedulePayload":
        if self.schedule_kind == "weekdays" and self.weekday_mask <= 0:
            raise ValueError("Mindestens ein Wochentag auswählen")
        return self

    def pause_until_date(self):
        from services.schedule import _parse_pause_until

        return _parse_pause_until(self.pause_until)