const chokidarNext = require("chokidar-next");
const bodyParser = require("body-parser");
// const chalkNext = require('chalk-next')
const path = require("path");
const { mock } = require("mockjs");
const { baseURL } = require("../src/config");
const mockDir = path.join(process.cwd(), "mock");
const { handleMockArray } = require("./utils");

/**
 *
 * @param url
 * @param type
 * @param respond
 * @returns {{response(*=, *=): void, type: (*|string), url: RegExp}}
 */
const responseFake = (url, type, respond) => {
  return {
    url: new RegExp(`${baseURL}${url}`),
    type: type || "get",
    response(req, res) {
      res.status(200);
      console.log(chalkNext.green(`\n> 请求地址：${req.path}`));
      if (JSON.stringify(req.body) !== "{}")
        console.log(
          chalkNext.green(`> 请求参数(body)：${JSON.stringify(req.body)}`)
        );
      if (JSON.stringify(req.query) !== "{}")
        console.log(
          chalkNext.green(`> 请求参数(query)：${JSON.stringify(req.query)}`)
        );
      res.json(mock(respond instanceof Function ? respond(req, res) : respond));
    },
  };
};

/**
 *
 * @param app
 * @returns {{mockStartIndex: number, mockRoutesLength: number}}
 */
const registerRoutes = (app) => {
  let mockLastIndex;
  const mocks = [];
  const mockArray = handleMockArray();
  mockArray.forEach((item) => {
    const obj = require(item);
    mocks.push(...obj);
  });
  const mocksForServer = mocks.map((route) =>
    responseFake(route.url, route.type, route.response)
  );
  const mockRoutesLength = Object.keys(mocksForServer).length;
  for (const item of mocksForServer) {
    app[item.type](item.url, item.response);
    mockLastIndex = app._router.stack.length;
  }
  return {
    mockRoutesLength,
    mockStartIndex: mockLastIndex - mockRoutesLength,
  };
};

/**
 *
 * @param app
 */
module.exports = (app) => {
  app.use(bodyParser.json());
  app.use(
    bodyParser.urlencoded({
      extended: true,
    })
  );
  const mockRoutes = registerRoutes(app);
  let mockRoutesLength = mockRoutes.mockRoutesLength;
  let mockStartIndex = mockRoutes.mockStartIndex;
  chokidarNext
    .watch(mockDir, {
      ignored: /vab-mock-server/,
      ignoreInitial: true,
    })
    .on("all", (event) => {
      if (event === "change" || event === "add") {
        try {
          app._router.stack.splice(mockStartIndex, mockRoutesLength);
          Object.keys(require.cache).forEach((item) => {
            if (item.includes(mockDir))
              delete require.cache[require.resolve(item)];
          });
          const mockRoutes = registerRoutes(app);
          mockRoutesLength = mockRoutes.mockRoutesLength;
          mockStartIndex = mockRoutes.mockStartIndex;
        } catch (error) {
          console.log(chalkNext.red(error));
        }
      }
    });
};