import uuid
from datetime import datetime
from sqlalchemy import String, Boolean, DateTime, ForeignKey
from sqlalchemy.orm import Mapped, mapped_column, relationship
from sqlalchemy.dialects.postgresql import UUID, JSONB
from app.database import Base
from typing import TYPE_CHECKING
if TYPE_CHECKING:
    from app.domains.tenants.models import Tenant


class AuditLog(Base):
    __tablename__ = "audit_log"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    user_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=True)
    action: Mapped[str] = mapped_column(String(100), nullable=False)
    entity_type: Mapped[str] = mapped_column(String(100), nullable=True)
    entity_id: Mapped[str] = mapped_column(String(255), nullable=True)
    details: Mapped[dict] = mapped_column(JSONB, nullable=True)
    timestamp: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, nullable=False)

    # Notification center columns
    target_user_id: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True), ForeignKey("users.id", ondelete="SET NULL"), nullable=True,
    )
    read_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    notification: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
    channel: Mapped[str] = mapped_column(String(20), nullable=False, default="notification")
    tenant_id: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True), ForeignKey("tenants.id"), nullable=True, index=True
    )

    user: Mapped["User"] = relationship("User", back_populates="audit_logs", foreign_keys=[user_id])
    target_user: Mapped["User"] = relationship("User", foreign_keys=[target_user_id])


# Event type constants
class NotificationEvent:
    ORDER_SUBMITTED = "order.submitted"
    ORDER_COMPLETED = "order.completed"
    RENDER_COMPLETED = "render.completed"
    RENDER_FAILED = "render.failed"
    EXCEL_IMPORTED = "excel.imported"

    ALL = [ORDER_SUBMITTED, ORDER_COMPLETED, RENDER_COMPLETED, RENDER_FAILED, EXCEL_IMPORTED]


class NotificationConfig(Base):
    __tablename__ = "notification_configs"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    user_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True
    )
    event_type: Mapped[str] = mapped_column(String(100), nullable=False)
    channel: Mapped[str] = mapped_column(String(20), nullable=False)  # "in_app" | "email"
    enabled: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
    frequency: Mapped[str] = mapped_column(String(20), nullable=False, default="immediate")  # "immediate" | "daily" | "never"
    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, nullable=False)