from __future__ import annotations

import uuid
from datetime import datetime
from typing import Any

from sqlalchemy import DateTime, ForeignKey, String, Text, UniqueConstraint, func
from sqlalchemy.orm import Mapped, mapped_column, relationship
from sqlalchemy.types import JSON

from app.db.base_class import Base


class AgentAsset(Base):
    __tablename__ = "agent_assets"

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    asset_type: Mapped[str] = mapped_column(String(20), index=True)
    code: Mapped[str] = mapped_column(String(100), unique=True, index=True)
    name: Mapped[str] = mapped_column(String(200))
    description: Mapped[str] = mapped_column(Text(), default="")
    domain: Mapped[str] = mapped_column(String(50), index=True)
    scenario_json: Mapped[list[Any]] = mapped_column(JSON, default=list)
    owner: Mapped[str] = mapped_column(String(100))
    reviewer: Mapped[str | None] = mapped_column(String(100), nullable=True)
    status: Mapped[str] = mapped_column(String(20), index=True, default="draft")
    current_version: Mapped[str | None] = mapped_column(String(30), nullable=True)
    published_version: Mapped[str | None] = mapped_column(String(30), nullable=True)
    working_version: Mapped[str | None] = mapped_column(String(30), nullable=True)
    config_json: Mapped[dict[str, Any]] = mapped_column(JSON, default=dict)
    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()
    )

    versions = relationship(
        "AgentAssetVersion",
        back_populates="asset",
        cascade="all, delete-orphan",
        order_by="desc(AgentAssetVersion.created_at)",
    )
    reviews = relationship(
        "AgentAssetReview",
        back_populates="asset",
        cascade="all, delete-orphan",
        order_by="desc(AgentAssetReview.created_at)",
    )
    scheduled_runs = relationship("AgentRun", back_populates="task_asset")


class AgentAssetVersion(Base):
    __tablename__ = "agent_asset_versions"
    __table_args__ = (
        UniqueConstraint("asset_id", "version", name="uq_agent_asset_versions_asset_version"),
    )

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    asset_id: Mapped[str] = mapped_column(ForeignKey("agent_assets.id"), index=True)
    version: Mapped[str] = mapped_column(String(30))
    content: Mapped[str] = mapped_column(Text())
    content_type: Mapped[str] = mapped_column(String(20))
    change_note: Mapped[str | None] = mapped_column(Text(), nullable=True)
    created_by: Mapped[str] = mapped_column(String(100))
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())

    asset = relationship("AgentAsset", back_populates="versions")


class AgentAssetReview(Base):
    __tablename__ = "agent_asset_reviews"

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    asset_id: Mapped[str] = mapped_column(ForeignKey("agent_assets.id"), index=True)
    version: Mapped[str] = mapped_column(String(30))
    reviewer: Mapped[str] = mapped_column(String(100))
    review_status: Mapped[str] = mapped_column(String(20), index=True)
    review_note: Mapped[str | None] = mapped_column(Text(), nullable=True)
    reviewed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())

    asset = relationship("AgentAsset", back_populates="reviews")