import type { NextApiRequest, NextApiResponse } from 'next';
import { jsonRes } from '@/service/response';
import { connectToDatabase, Chat } from '@/service/mongo';
import type { ChatPopulate } from '@/types/mongoSchema';
import type { InitChatResponse } from '@/api/response/chat';
import { authToken } from '@/service/utils/tools';

/* 初始化我的聊天框，需要身份验证 */
export default async function handler(req: NextApiRequest, res: NextApiResponse) {
  try {
    const { authorization } = req.headers;
    const userId = await authToken(authorization);

    const { chatId } = req.query as { chatId: string };

    if (!chatId) {
      throw new Error('缺少参数');
    }

    await connectToDatabase();

    // 获取 chat 数据
    const chat = await Chat.findOne<ChatPopulate>({
      _id: chatId,
      userId
    }).populate({
      path: 'modelId',
      options: {
        strictPopulate: false
      }
    });

    if (!chat) {
      throw new Error('聊天框不存在');
    }

    // filter 掉被 deleted 的内容
    chat.content = chat.content.filter((item) => item.deleted !== true);

    const model = chat.modelId;
    jsonRes<InitChatResponse>(res, {
      data: {
        chatId: chat._id,
        modelId: model._id,
        name: model.name,
        avatar: model.avatar,
        intro: model.intro,
        modelName: model.service.modelName,
        chatModel: model.service.chatModel,
        history: chat.content
      }
    });
  } catch (err) {
    jsonRes(res, {
      code: 500,
      error: err
    });
  }
}