import { IncomingMessage, ServerResponse } from 'http';
import { wsProxyManager } from './index.ts';

import { App } from '@kevisual/router';
import { logger } from '../logger.ts';
import { getLoginUser } from '@/modules/auth.ts';
import { createStudioAppListHtml } from '../html/studio-app-list/index.ts';
import { omit } from 'es-toolkit';
import { baseProxyUrl, proxyDomain } from '../domain.ts';
import { renderServerHtml } from '../html/render-server-html.ts';

type ProxyOptions = {
  createNotFoundPage: (msg?: string) => any;
};
export const UserV1Proxy = async (req: IncomingMessage, res: ServerResponse, opts?: ProxyOptions) => {
  const { url, method } = req;
  const _url = new URL(url || '', `http://localhost`);
  const { pathname, searchParams } = _url;
  const isGet = method === 'GET';

  let [user, app, userAppKey] = pathname.split('/').slice(1);
  if (!user || !app) {
    opts?.createNotFoundPage?.('应用未找到');
    return false;
  }

  const data = await App.handleRequest(req, res);
  const loginUser = await getLoginUser(req);
  if (!loginUser) {
    opts?.createNotFoundPage?.('没有登录');
    return false;
  }

  const isAdmin = loginUser.tokenUser?.username === user

  if (!userAppKey) {
    if (isAdmin) {
      return handleRequest(req, res, { user, app, userAppKey, isAdmin });
    } else {
      opts?.createNotFoundPage?.('应用访问失败');
      return false;
    }
  }
  if (!userAppKey.includes('--')) {
    userAppKey = user + '--' + userAppKey;
  }

  // TODO: 如果不是管理员，是否需要添加其他人可以访问的逻辑？
  if (!isAdmin) {
    opts?.createNotFoundPage?.('没有访问应用权限');
    return false;
  }
  if (!userAppKey.startsWith(user + '--')) {
    userAppKey = user + '--' + userAppKey;
  }
  logger.debug('data', data);
  const client = wsProxyManager.get(userAppKey);
  const { ids, infoList } = wsProxyManager.getIdsInfo(user + '--');
  if (!client) {
    if (isGet) {
      if (isAdmin) {
        // const html = createStudioAppListHtml({ user, appIds: ids, userAppKey, infoList });
        // res.writeHead(200, { 'Content-Type': 'text/html' });
        // res.end(html);
        // https://kevisual.cn/root/v1-manager/
        const html = await fetch(`${baseProxyUrl}/root/v1-manager/index.html`).then(res => res.text());
        res.writeHead(200, { 'Content-Type': 'text/html' });
        res.end(renderServerHtml({ user, appIds: ids, userAppKey, infoList }, html));
        return true;
      } else {
        opts?.createNotFoundPage?.('应用访问失败');
      }
    } else {
      res.writeHead(404, { 'Content-Type': 'application/json' });
      res.end(JSON.stringify({ error: '应用访问失败' }));
    }
    return false;
  }
  const path = searchParams.get('path');
  if (!path) {
    // 显示前端页面
    const html = await fetch(`${baseProxyUrl}/root/router-studio/index.html`).then(res => res.text());
    res.writeHead(200, { 'Content-Type': 'text/html' });
    res.end(html);
    return true;
  }
  let message: any = data;
  if (!isAdmin) {
    message = omit(data, ['token', 'cookies']);
  }
  if (client.status === 'waiting') {
    res.writeHead(603, { 'Content-Type': 'application/json' });
    res.end(JSON.stringify({ message: '应用没有鉴权' }));
    return true;
  }
  const value = await client.sendData(message, {
    state: { tokenUser: omit(loginUser.tokenUser, ['oauthExpand']) },
  });
  if (value) {
    res.writeHead(200, { 'Content-Type': 'application/json' });
    res.end(JSON.stringify(value));
    return true;
  }
  opts?.createNotFoundPage?.('应用未启动');
  return true;
};

const handleRequest = async (req: IncomingMessage, res: ServerResponse, opts?: { user?: string, app?: string, userAppKey?: string, isAdmin?: boolean }) => {
  const { user, userAppKey } = opts || {};
  const isGet = req.method === 'GET';
  // 获取所有的管理员的应用列表
  const { ids, infoList } = wsProxyManager.getIdsInfo(user + '--');
  if (isGet) {
    const html = await fetch(`${baseProxyUrl}/root/v1-manager/index.html`).then(res => res.text());
    res.writeHead(200, { 'Content-Type': 'text/html' });
    res.end(html);
    return;
  } else {
    const url = new URL(req.url || '', 'http://localhost');
    const path = url.searchParams.get('path');
    if (path) {
      const appId = url.searchParams.get('appId') || '';
      const client = wsProxyManager.get(appId!)!;
      if (!client) {
        res.writeHead(404, { 'Content-Type': 'application/json' });
        res.end(JSON.stringify({ code: 404, message: '应用未找到' }));
        return;
      }
      if (path === 'connected') {
        client.sendConnected();
        res.writeHead(200, { 'Content-Type': 'application/json' });
        res.end(JSON.stringify({ code: 200, message: '应用已连接' }));
        return;
      }
      if (path === 'rename') {
        const newId = url.searchParams.get('newId') || '';
        if (!newId) {
          res.writeHead(400, { 'Content-Type': 'application/json' });
          res.end(JSON.stringify({ code: 400, message: 'newId 参数缺失' }));
          return;
        }
        const realNewId = user + '--' + newId;
        const wsMessage = wsProxyManager.get(realNewId!)!;
        if (wsMessage) {
          res.writeHead(400, { 'Content-Type': 'application/json' });
          res.end(JSON.stringify({ code: 400, message: 'newId 已存在' }));
          return;
        }
        wsProxyManager.changeId(appId, realNewId);
        res.writeHead(200, { 'Content-Type': 'application/json' });
        res.end(JSON.stringify({ code: 200, message: '应用重命名成功' }));
        return;
      }
    }
    res.writeHead(200, { 'Content-Type': 'application/json' });
    res.end(JSON.stringify({ code: 200, data: { ids, infoList } }));
    return;
  }
}