"""
KPI 審核紀錄 Model
"""
from datetime import datetime
from typing import Optional, TYPE_CHECKING

from sqlalchemy import String, Integer, DateTime, Text, ForeignKey
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.core.database import Base

if TYPE_CHECKING:
    from app.models.kpi_sheet import KPISheet
    from app.models.employee import Employee


class KPIReviewLog(Base):
    """KPI 審核紀錄"""

    __tablename__ = "KPI_D_review_logs"

    id: Mapped[int] = mapped_column(primary_key=True)
    sheet_id: Mapped[int] = mapped_column(ForeignKey("KPI_D_sheets.id", ondelete="CASCADE"), nullable=False)
    action: Mapped[str] = mapped_column(String(50), nullable=False)  # submit, approve, reject, self_eval, manager_eval
    actor_id: Mapped[int] = mapped_column(ForeignKey("KPI_D_employees.id"), nullable=False)
    from_status: Mapped[Optional[str]] = mapped_column(String(20))
    to_status: Mapped[Optional[str]] = mapped_column(String(20))
    comment: Mapped[Optional[str]] = mapped_column(Text)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)

    # Relationships
    sheet: Mapped["KPISheet"] = relationship("KPISheet", back_populates="review_logs")
    actor: Mapped["Employee"] = relationship("Employee")

    def __repr__(self) -> str:
        return f"<KPIReviewLog id={self.id} action={self.action} sheet={self.sheet_id}>"