import uuid
import enum
from sqlalchemy import Column, String, Text, Boolean, DateTime, ForeignKey, Enum, JSON
from sqlalchemy.sql import func
from sqlalchemy.orm import relationship
from app.core.database import Base


class TriggerType(str, enum.Enum):
    FIELD_CHANGE = "field_change"
    SCHEDULE = "schedule"


class Trigger(Base):
    __tablename__ = "pjctrl_triggers"

    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    project_id = Column(String(36), ForeignKey("pjctrl_projects.id", ondelete="CASCADE"), nullable=False)
    name = Column(String(200), nullable=False)
    description = Column(Text, nullable=True)
    trigger_type = Column(
        Enum("field_change", "schedule", name="trigger_type_enum"),
        nullable=False
    )
    conditions = Column(JSON, nullable=False)
    actions = Column(JSON, nullable=False)
    is_active = Column(Boolean, default=True, nullable=False)
    created_by = Column(String(36), ForeignKey("pjctrl_users.id", ondelete="SET NULL"), nullable=True)
    created_at = Column(DateTime, server_default=func.now(), nullable=False)
    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now(), nullable=False)

    # Relationships
    project = relationship("Project", back_populates="triggers")
    creator = relationship("User", back_populates="created_triggers")
    logs = relationship("TriggerLog", back_populates="trigger", cascade="all, delete-orphan")