from datetime import UTC, datetime

from app import db


class Label(db.Model):
    """Label model for Kanban labels"""

    __tablename__ = "labels"

    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100))
    color = db.Column(db.String(50))  # color name like 'green', 'red', 'blue'
    uses = db.Column(db.Integer, default=0)

    # Foreign keys
    board_id = db.Column(db.Integer, db.ForeignKey("boards.id", ondelete="CASCADE"), nullable=False, index=True)

    # Timestamps
    created_at = db.Column(db.DateTime, default=lambda: datetime.now(UTC))
    updated_at = db.Column(
        db.DateTime,
        default=lambda: datetime.now(UTC),
        onupdate=lambda: datetime.now(UTC),
    )

    # Relationships
    card_labels = db.relationship("CardLabel", backref="label", cascade="all, delete-orphan", lazy="dynamic")

    def to_dict(self):
        """Convert label to dictionary"""
        return {
            "id": self.id,
            "name": self.name,
            "color": self.color,
            "uses": self.uses,
            "board_id": self.board_id,
            "created_at": self.created_at.isoformat() if self.created_at else None,
            "updated_at": self.updated_at.isoformat() if self.updated_at else None,
        }

    def __repr__(self):
        return f"<Label {self.name} ({self.color})>"