from __future__ import annotations

import uuid
from datetime import datetime

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

from app.db.base_class import Base


class ApprovalRecord(Base):
    __tablename__ = "approval_records"

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    request_id: Mapped[str] = mapped_column(ForeignKey("reimbursement_requests.id"), index=True)
    approver_id: Mapped[str | None] = mapped_column(ForeignKey("employees.id"), nullable=True)
    action: Mapped[str] = mapped_column(String(50), index=True)
    comment: Mapped[str | None] = mapped_column(Text(), nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())

    request = relationship("ReimbursementRequest", back_populates="approval_records")