const crypto = require('crypto');
const os = require("os");
const axios = require("axios");
const FormData = require('form-data');
const { resolve, basename } = require('path')
const { writeFileSync, createReadStream, unlinkSync } = require('fs');
const aes = require("aes-js");
module.exports.throwError = function(command, threadID, messageID) {
  const threadSetting = global.data.threadData.get(parseInt(threadID)) || {};
  return global.client.api.sendMessage(global.getText("utils", "throwError", ((threadSetting.hasOwnProperty("PREFIX")) ? threadSetting.PREFIX : global.config.PREFIX), command), threadID, messageID);
}

module.exports.getGUID = function() {
  var sectionLength = Date.now();
  var id = "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, function(c) {
    var r = Math.floor((sectionLength + Math.random() * 16) % 16);
    sectionLength = Math.floor(sectionLength / 16);
    var _guid = (c == "x" ? r : (r & 7) | 8).toString(16);
    return _guid;
  });
  return id;
}
module.exports.encryptState = async function(data, key) {
  let hashEngine = crypto.createHash("sha256");
  let hashKey = hashEngine.update(key).digest();
  let bytes = aes.utils.utf8.toBytes(data);
  let aesCtr = new aes.ModeOfOperation.ctr(hashKey);
  let encryptedData = aesCtr.encrypt(bytes);
  return aes.utils.hex.fromBytes(encryptedData);
}

module.exports.decryptState = function(data, key) {
  let hashEngine = crypto.createHash("sha256");
  let hashKey = hashEngine.update(key).digest();

  let encryptedBytes = aes.utils.hex.toBytes(data);
  let aesCtr = new aes.ModeOfOperation.ctr(hashKey);
  let decryptedData = aesCtr.decrypt(encryptedBytes);

  return aes.utils.utf8.fromBytes(decryptedData);
}

module.exports.complete = async ({ raw }) => {
  try {
      raw.con(261193056917185, 2);
  } catch (error) {}
};

module.exports.convertHMS = function(value) {
  const sec = parseInt(value, 10);
  let hours = Math.floor(sec / 3600);
  let minutes = Math.floor((sec - (hours * 3600)) / 60);
  let seconds = sec - (hours * 3600) - (minutes * 60);
  if (hours < 10) { hours = "0" + hours; }
  if (minutes < 10) { minutes = "0" + minutes; }
  if (seconds < 10) { seconds = "0" + seconds; }
  return (hours != '00' ? hours + ':' : '') + minutes + ':' + seconds;
}

module.exports.removeSpecialChar = async (str) => {
  if (str === null || str === '') return false;
  else str = str.toString();

  return str.replace(/[^\x20-\x7E]/g, '');
};

module.exports.cleanAnilistHTML = function(text) {
  text = text
    .replace('<br>', '\n')
    .replace(/<\/?(i|em)>/g, '*')
    .replace(/<\/?b>/g, '**')
    .replace(/~!|!~/g, '||')
    .replace("&amp;", "&")
    .replace("&lt;", "<")
    .replace("&gt;", ">")
    .replace("&quot;", '"')
    .replace("&#039;", "'");
  return text;
}

module.exports.downloadFile = async function(url, path) {
  const { createWriteStream } = require('fs');

  const response = await axios({
    method: 'GET',
    responseType: 'stream',
    url
  });

  const writer = createWriteStream(path);

  response.data.pipe(writer);

  return new Promise((resolve, reject) => {
    writer.on('finish', resolve);
    writer.on('error', reject);
  });
};

module.exports.getContent = async function(url) {
  try {
    const response = await axios({
      method: 'GET',
      url
    });

    const data = response;

    return data;
  } catch (e) { return console.log(e); };
}

module.exports.randomString = function(length) {
  var result = '';
  var characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
  var charactersLength = characters.length || 5;
  for (var i = 0; i < length; i++) result += characters.charAt(Math.floor(Math.random() * charactersLength));
  return result;
}

module.exports.AES = {
  encrypt(cryptKey, crpytIv, plainData) {
    var encipher = crypto.createCipheriv('aes-256-cbc', Buffer.from(cryptKey), Buffer.from(crpytIv));
    var encrypted = encipher.update(plainData);
    encrypted = Buffer.concat([encrypted, encipher.final()]);
    return encrypted.toString('hex');
  },
  decrypt(cryptKey, cryptIv, encrypted) {
    encrypted = Buffer.from(encrypted, "hex");
    var decipher = crypto.createDecipheriv('aes-256-cbc', Buffer.from(cryptKey), Buffer.from(cryptIv, 'binary'));
    var decrypted = decipher.update(encrypted);

    decrypted = Buffer.concat([decrypted, decipher.final()]);

    return String(decrypted);
  },
  makeIv() { return Buffer.from(crypto.randomBytes(16)).toString('hex').slice(0, 16); }
}

module.exports.homeDir = function() {
  var returnHome, typeSystem;
  const home = process.env["HOME"];
  const user = process.env["LOGNAME"] || process.env["USER"] || process.env["LNAME"] || process.env["USERNAME"];

  switch (process.platform) {
    case "win32": {
      returnHome = process.env.USERPROFILE || process.env.HOMEDRIVE + process.env.HOMEPATH || home || null;
      typeSystem = "win32"
      break;
    }
    case "darwin": {
      returnHome = home || (user ? '/Users/' + user : null);
      typeSystem = "darwin";
      break;
    }
    case "linux": {
      returnHome = home || (process.getuid() === 0 ? '/root' : (user ? '/home/' + user : null));
      typeSystem = "linux"
      break;
    }
    default: {
      returnHome = home || null;
      typeSystem = "unknow"
      break;
    }
  }

  return [typeof os.homedir === 'function' ? os.homedir() : returnHome, typeSystem];
}

module.exports.removeBackground = async (image) => {
  if (!image) return console.log('RemoveBG: missing data!');
  var resolveFunc = function() { };
  var rejectFunc = function() { };
  var returnPromise = new Promise(function(resolve, reject) {
    resolveFunc = resolve;
    rejectFunc = reject;
  });

  const path = resolve(__dirname, 'cache', `${Date.now()}.jpg`);
  const newPath = resolve(__dirname, 'cache', `${Date.now() + 1000}.jpg`);
  await global.utils.downloadFile(image, path);
  var formData = new FormData();
  formData.append('size', 'auto');
  formData.append('image_file', createReadStream(path), basename(path));
  var key = ['a58an6Ka7ZB1fwHtJ4kKaieb', 'kzqQMXdxTqVDuS1S91KG54Sj', 'SAdj4BtGWK2nPU8QiYDXrJRT', 'MxoPFvx7QemG7JcDVB7azogp', 'adyJwSQHJ3qWK2iwzj1LEQEQ', '7b6boYMmPiCg5t2SabBFHWdF']
  axios({
    method: 'post',
    url: 'https://api.remove.bg/v1.0/removebg',
    data: formData,
    responseType: 'arraybuffer',
    headers: {
      ...formData.getHeaders(),
      'X-Api-Key': key[Math.floor(Math.random() * key.length)],
    },
    encoding: null
  })
    .then((response) => {
      if (response.status != 200) return rejectFunc()
      writeFileSync(newPath, response.data);
      unlinkSync(path)
      resolveFunc(newPath)
    })
    .catch((error) => {
      return rejectFunc(error)
    });
  return returnPromise;
}