from sqlalchemy import Column, Integer, String, DateTime, ForeignKey, UniqueConstraint
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func
from app.database import Base


class Attendance(Base):
    __tablename__ = "attendances"

    id = Column(Integer, primary_key=True, index=True)
    schedule_id = Column(Integer, ForeignKey("mass_schedules.id"), nullable=False)
    asim_id = Column(Integer, ForeignKey("asim.id"), nullable=False)
    status = Column(String(20), nullable=False)  # 'hadir' or 'tidak_hadir'
    recorded_by_id = Column(Integer, ForeignKey("users.id"), nullable=True)
    recorded_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())

    schedule = relationship("MassSchedule")
    asim = relationship("Asim")
    recorded_by = relationship("User", foreign_keys=[recorded_by_id])

    __table_args__ = (
        UniqueConstraint("schedule_id", "asim_id", name="uq_attendance_schedule_asim"),
    )