import enum
from datetime import date, datetime

from sqlalchemy import Date, Enum, ForeignKey, Integer, UniqueConstraint
from sqlalchemy.orm import Mapped, mapped_column, relationship
from sqlalchemy.sql import func

from app.database import Base
from app.models.habit import _by_value


class HabitLogStatus(str, enum.Enum):
    DONE = "done"
    FAILED = "failed"  # /today의 "어제 놓친 습관" 배너에서 사용자가 명시적으로 실패를 확정한 경우


class HabitLog(Base):
    __tablename__ = "habit_log"
    __table_args__ = (UniqueConstraint("habit_id", "log_date", name="uq_habit_log_habit_date"),)

    id: Mapped[int] = mapped_column(Integer, primary_key=True)
    habit_id: Mapped[int] = mapped_column(ForeignKey("habit.id", ondelete="CASCADE"), nullable=False)
    log_date: Mapped[date] = mapped_column(Date, nullable=False)
    status: Mapped[HabitLogStatus] = mapped_column(
        Enum(HabitLogStatus, native_enum=False, length=20, values_callable=_by_value),
        nullable=False,
        default=HabitLogStatus.DONE,
    )
    checked_at: Mapped[datetime] = mapped_column(server_default=func.now(), nullable=False)

    habit: Mapped["Habit"] = relationship(back_populates="logs")