from __future__ import annotations

from pydantic import ValidationError
from quart import Blueprint, jsonify

from app.api.v1.utils import ApiDependencies, LongArticlesMcpRequest
from app.api.v1.utils import parse_json, validation_error_response
from app.domains.mcp import LongArticleMCP


def create_mcp_bp(deps: ApiDependencies) -> Blueprint:
    bp = Blueprint("mcp", __name__)

    @bp.route("/long_articles_mcp/<string:task_name>", methods=["POST"])
    async def long_articles_mcp(task_name: str):
        """
        MCP 交互接口

        - POST /api/long_articles_mcp/<task_name>
        - 通过 task_name 分发到 LongArticleMCP 内对应的方法
        - 请求体为 JSON，可选字段如 limit、offset 等，由各 task 按需使用
        """
        try:
            req, _ = await parse_json(LongArticlesMcpRequest)
        except ValidationError as e:
            payload, status = validation_error_response(e)
            return jsonify(payload), status

        # 使用校验后的模型转 dict，保证 limit/offset 等类型正确，且含 extra 透传字段
        params = req.model_dump(exclude_none=True)

        mcp = LongArticleMCP(pool=deps.db, log_service=deps.log)
        handler_map = {
            "get_decode_response": mcp.get_decode_response,
        }
        handler = handler_map.get(task_name)
        if handler is None:
            return (
                jsonify(
                    {
                        "code": 404,
                        "message": f"unknown task_name: {task_name}",
                        "data": None,
                    }
                ),
                404,
            )

        result = await handler(params=params)
        return jsonify({"code": 0, "message": "success", "data": result})

    return bp