import uuid
from datetime import datetime

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

from app.core.actors import ActorType
from app.models.base import Base, GUID


class SignalementTimeline(Base):
    __tablename__ = "signalement_timeline"
    __table_args__ = (
        CheckConstraint(
            "(actor_type = 'AUTH_USER' AND actor_guest_id IS NULL) "
            "OR (actor_type = 'GUEST' AND actor_user_id IS NULL AND actor_guest_id IS NOT NULL)",
            name="ck_signalement_timeline_actor_consistency",
        ),
    )

    id: Mapped[uuid.UUID] = mapped_column(GUID, primary_key=True, default=uuid.uuid4)
    signalement_id: Mapped[uuid.UUID] = mapped_column(
        GUID,
        ForeignKey("signalements.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    type_evenement: Mapped[str] = mapped_column(String(100), nullable=False)
    description: Mapped[str] = mapped_column(Text, nullable=False)
    timestamp: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), nullable=False
    )
    actor_type: Mapped[str] = mapped_column(
        String(20),
        nullable=False,
        default=ActorType.AUTH_USER.value,
        index=True,
    )
    actor_user_id: Mapped[uuid.UUID | None] = mapped_column(
        GUID,
        ForeignKey("utilisateurs.id", ondelete="SET NULL"),
        nullable=True,
        index=True,
    )
    actor_guest_id: Mapped[uuid.UUID | None] = mapped_column(
        GUID,
        ForeignKey("guest_sessions.id", ondelete="SET NULL"),
        nullable=True,
        index=True,
    )
    effectue_par_id: Mapped[uuid.UUID | None] = mapped_column(
        GUID,
        ForeignKey("utilisateurs.id", ondelete="SET NULL"),
        nullable=True,
    )
    effectue_par_nom: Mapped[str | None] = mapped_column(String(200), nullable=True)
    valeur_precedente: Mapped[str | None] = mapped_column(String(100), nullable=True)
    nouvelle_valeur: Mapped[str | None] = mapped_column(String(100), nullable=True)

    signalement: Mapped["Signalement"] = relationship("Signalement", back_populates="timeline")


from app.models.signalement import Signalement  # noqa: E402, F401