from flask import jsonify, request
from flask_jwt_extended import jwt_required, get_jwt_identity
from . import api_bp
from ..models import Agent, Workspace
from ..schemas import AgentSchema, AgentCreateSchema, AgentUpdateSchema
from ..services import AgentService


agent_schema = AgentSchema()
agent_create_schema = AgentCreateSchema()
agent_update_schema = AgentUpdateSchema()


@api_bp.route("/workspaces/<int:workspace_id>/agents", methods=["GET"])
@jwt_required()
def get_agents(workspace_id):
    user_id = get_jwt_identity()
    workspace = Workspace.query.filter_by(id=workspace_id, user_id=user_id).first()
    if not workspace:
        return jsonify({"error": "工作空间不存在"}), 404

    agents = Agent.query.filter_by(workspace_id=workspace_id).all()
    return jsonify(agent_schema.dump(agents, many=True))


@api_bp.route("/workspaces/<int:workspace_id>/agents", methods=["POST"])
@jwt_required()
def create_agent(workspace_id):
    user_id = get_jwt_identity()
    workspace = Workspace.query.filter_by(id=workspace_id, user_id=user_id).first()
    if not workspace:
        return jsonify({"error": "工作空间不存在"}), 404

    data = request.get_json()
    errors = agent_create_schema.validate(data)
    if errors:
        return jsonify({"error": errors}), 400

    try:
        agent = AgentService.create_agent(workspace_id, data)
        return jsonify(agent_schema.dump(agent)), 201
    except ValueError as e:
        return jsonify({"error": str(e)}), 400


@api_bp.route("/agents/<int:agent_id>", methods=["GET"])
@jwt_required()
def get_agent(agent_id):
    user_id = get_jwt_identity()
    agent = Agent.query.filter_by(id=agent_id).first()
    if not agent:
        return jsonify({"error": "Agent 不存在"}), 404

    workspace = Workspace.query.filter_by(
        id=agent.workspace_id, user_id=user_id
    ).first()
    if not workspace:
        return jsonify({"error": "无权访问此 Agent"}), 403

    return jsonify(agent_schema.dump(agent))


@api_bp.route("/agents/<int:agent_id>", methods=["PUT"])
@jwt_required()
def update_agent(agent_id):
    user_id = get_jwt_identity()
    agent = Agent.query.filter_by(id=agent_id).first()
    if not agent:
        return jsonify({"error": "Agent 不存在"}), 404

    workspace = Workspace.query.filter_by(
        id=agent.workspace_id, user_id=user_id
    ).first()
    if not workspace:
        return jsonify({"error": "无权访问此 Agent"}), 403

    data = request.get_json()
    errors = agent_update_schema.validate(data)
    if errors:
        return jsonify({"error": errors}), 400

    try:
        updated_agent = AgentService.update_agent(agent, data)
        return jsonify(agent_schema.dump(updated_agent))
    except ValueError as e:
        return jsonify({"error": str(e)}), 400


@api_bp.route("/agents/<int:agent_id>", methods=["DELETE"])
@jwt_required()
def delete_agent(agent_id):
    user_id = get_jwt_identity()
    agent = Agent.query.filter_by(id=agent_id).first()
    if not agent:
        return jsonify({"error": "Agent 不存在"}), 404

    workspace = Workspace.query.filter_by(
        id=agent.workspace_id, user_id=user_id
    ).first()
    if not workspace:
        return jsonify({"error": "无权访问此 Agent"}), 403

    try:
        AgentService.delete_agent(agent)
        return jsonify({"message": "Agent 已删除"})
    except ValueError as e:
        return jsonify({"error": str(e)}), 400