var moment = require('moment'); // require
const { faker } = require('@faker-js/faker');
const Ajv = require("ajv");
var validator = require('validator');
const base64 = require('base64-js');
const jwt = require('jsonwebtoken');
const { v4: uuidv4 } = require('uuid');
const _ = require('lodash');

function testLodash() {
  // Test data
  const users = [
    { id: 1, name: 'Alice', age: 25, active: true },
    { id: 2, name: 'Bob', age: 30, active: false },
    { id: 3, name: 'Charlie', age: 35, active: true },
    { id: 4, name: 'David', age: 40, active: false }
  ];

  // Example 1: Filter active users
  const activeUsers = _.filter(users, { active: true });
  console.log('Active Users:', activeUsers);

  // Example 2: Sort users by age in descending order
  const sortedByAge = _.orderBy(users, ['age'], ['desc']);
  console.log('Users sorted by age (desc):', sortedByAge);

  // Example 3: Get the names of all users
  const userNames = _.map(users, 'name');
  console.log('User Names:', userNames);
}

function testMoment() {
  console.log("Current time is:", moment().format());
}

function testUuidv4() {
  console.log("UUID is:", uuidv4());
}

function testAjv() {
  const ajv = new Ajv();
  const schema = {
    type: "object",
    properties: {
      foo: { type: "integer" },
      bar: { type: "string" },
    },
    required: ["foo"],
    additionalProperties: false,
  };
  const data = { foo: 1, bar: "abc" };
  const validate = ajv.compile(schema);
  const valid = validate(data);
  if (!valid) console.log(validate.errors);
}

function testBase64() {
  const text = 'Hello, world!';
  const textBytes = new TextEncoder().encode(text);
  const base64Encoded = base64.fromByteArray(textBytes);
  console.log('Base64 Encoded:', base64Encoded);

  const decodedBytes = base64.toByteArray(base64Encoded);
  const decodedText = new TextDecoder().decode(decodedBytes);
  console.log('Decoded Text:', decodedText);
}

function testValidator() {
  const result = validator.isEmail('fooo~bar.com');
  console.log("fooo~bar.com is email, right?", result);
}

function testFakerJS() {
  return {
    userId: faker.string.uuid(),
    username: faker.internet.username(),
    email: faker.internet.email(),
    avatar: faker.image.avatar(),
    password: faker.internet.password(),
    birthdate: faker.date.birthdate(),
    registeredAt: faker.date.past(),
  };
}

function testJwt() {
  const SECRET_KEY = 'your-secret-key';
  const payload = { userId: 123, username: 'testUser' };
  const token = jwt.sign(payload, SECRET_KEY, { expiresIn: '1h' });
  console.log('Generated Token:', token);
  try {
    const decoded = jwt.verify(token, SECRET_KEY);
    console.log('Decoded Payload:', decoded);
  } catch (err) {
    console.error('Token verification failed:', err.message);
  }
}

mock.define("/testlibs", "GET", function (req, res) {
  console.log("==== this is a test of libs supported =====");
  testLodash();
  testMoment();
  testUuidv4();
  testAjv();
  testValidator();
  testBase64();
  testJwt();
  const jsonData = testFakerJS();
  return res.status(200).json(jsonData);
});