from __future__ import annotations

from datetime import datetime
from typing import Optional
from uuid import UUID, uuid4

from sqlalchemy import ForeignKey, String, UniqueConstraint
from sqlalchemy.dialects.postgresql import JSONB, UUID as PGUUID
from sqlalchemy.orm import Mapped, mapped_column
from sqlalchemy.sql import func
from sqlalchemy.types import DateTime

from src.core.database import Base


class IntegrationResource(Base):
    __tablename__ = "integration_resources"

    id: Mapped[UUID] = mapped_column(PGUUID(as_uuid=True), primary_key=True, default=uuid4)
    connection_id: Mapped[UUID] = mapped_column(
        PGUUID(as_uuid=True), ForeignKey("connector_connections.id", ondelete="CASCADE"), nullable=False, index=True
    )
    resource_type: Mapped[str] = mapped_column(String(64), nullable=False)
    external_resource_id: Mapped[str] = mapped_column(String(255), nullable=False)
    external_version: Mapped[Optional[str]] = mapped_column(String(128), nullable=True)
    name: Mapped[str] = mapped_column(String(160), nullable=False)
    desired_state: Mapped[dict] = mapped_column(JSONB, nullable=False, default=dict)
    observed_state: Mapped[dict] = mapped_column(JSONB, nullable=False, default=dict)
    status: Mapped[str] = mapped_column(String(32), nullable=False, default="pending")
    last_error: Mapped[Optional[str]] = mapped_column(String(500), nullable=True)
    last_synced_at: Mapped[Optional[datetime]] = mapped_column(DateTime(timezone=True), nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
    updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())

    __table_args__ = (
        UniqueConstraint("connection_id", "resource_type", "external_resource_id", name="uq_integration_resource_connection_type_id"),
    )


class IntegrationBinding(Base):
    __tablename__ = "integration_bindings"

    id: Mapped[UUID] = mapped_column(PGUUID(as_uuid=True), primary_key=True, default=uuid4)
    resource_id: Mapped[UUID] = mapped_column(
        PGUUID(as_uuid=True), ForeignKey("integration_resources.id", ondelete="CASCADE"), nullable=False, index=True
    )
    project_id: Mapped[UUID] = mapped_column(
        PGUUID(as_uuid=True), ForeignKey("projects.id", ondelete="CASCADE"), nullable=False, index=True
    )
    deployment_id: Mapped[Optional[UUID]] = mapped_column(
        PGUUID(as_uuid=True), ForeignKey("project_deploys.id", ondelete="CASCADE"), nullable=True
    )
    environment: Mapped[str] = mapped_column(String(32), nullable=False, default="production")
    capability_bindings: Mapped[list] = mapped_column(JSONB, nullable=False, default=list)
    status: Mapped[str] = mapped_column(String(32), nullable=False, default="active")
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
    updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())

    __table_args__ = (
        UniqueConstraint("resource_id", "project_id", "deployment_id", name="uq_integration_binding_resource_scope"),
    )