from app import db
from datetime import date, time, datetime
import sqlalchemy as sa
import sqlalchemy.orm as so


class WorkEntry(db.Model):
    __tablename__ = "work_entries"

    id: so.Mapped[int] = so.mapped_column(primary_key=True)
    date: so.Mapped[date] = so.mapped_column(sa.Date, unique=True, nullable=False)
    journey_profile_id: so.Mapped[str | None] = so.mapped_column(sa.String(64), nullable=True)
    day_type: so.Mapped[str] = so.mapped_column(sa.String(16), nullable=False, default="WORK")
    comment: so.Mapped[str | None] = so.mapped_column(sa.Text, nullable=True)
    created_at: so.Mapped[datetime] = so.mapped_column(sa.DateTime, default=datetime.utcnow)
    updated_at: so.Mapped[datetime] = so.mapped_column(
        sa.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow
    )

    time_slots: so.Mapped[list["TimeSlot"]] = so.relationship(
        back_populates="entry", cascade="all, delete-orphan", order_by="TimeSlot.start_time"
    )

    def total_minutes(self) -> int:
        total = 0
        for slot in self.time_slots:
            start = slot.start_time.hour * 60 + slot.start_time.minute
            end = slot.end_time.hour * 60 + slot.end_time.minute
            if end <= start:
                end += 24 * 60
            total += end - start
        return total

    def total_hours_str(self) -> str:
        minutes = self.total_minutes()
        return f"{minutes // 60}h{minutes % 60:02d}"


class TimeSlot(db.Model):
    __tablename__ = "time_slots"

    id: so.Mapped[int] = so.mapped_column(primary_key=True)
    entry_id: so.Mapped[int] = so.mapped_column(sa.ForeignKey("work_entries.id"), nullable=False)
    start_time: so.Mapped[time] = so.mapped_column(sa.Time, nullable=False)
    end_time: so.Mapped[time] = so.mapped_column(sa.Time, nullable=False)

    entry: so.Mapped["WorkEntry"] = so.relationship(back_populates="time_slots")


class LeaveBalance(db.Model):
    __tablename__ = "leave_balance"

    id: so.Mapped[int] = so.mapped_column(primary_key=True)
    year: so.Mapped[int] = so.mapped_column(sa.Integer, unique=True, nullable=False)
    conges_total: so.Mapped[int] = so.mapped_column(sa.Integer, default=28)
    rtt_total: so.Mapped[int] = so.mapped_column(sa.Integer, default=18)