#!/usr/bin/env node
'use strict';
const clipboardy = require('clipboardy');
const meow = require('meow');
const LessPass = require('lesspass');
const read = require('read');
const chalk = require('chalk');

const helpMessage = `
    Usage
      $ lesspass <site> <login> [masterPassword] [options]

    Options
        -l                  add lowercase in password
        -u                  add uppercase in password
        -d                  add digits in password
        -s                  add symbols in password

        --no-lowercase      remove lowercase from password
        --no-uppercase      remove uppercase from password
        --no-digits         remove digits from password
        --no-symbols        remove symbols from password

        --length, -L        int (default 16)
        --counter, -c       int (default 1)

        --clipboard, -C     copy generated password to clipboard rather than displaying it.
                            Need pbcopy (OSX), xsel (Linux) or clip (Windows).

    Examples
      # no symbols
      $ lesspass lesspass.com contact@lesspass.com password --no-symbols
      OlfK63bmUhqrGODR

      # no symbols shortcut
      $ lesspass lesspass.com contact@lesspass.com password -lud
      OlfK63bmUhqrGODR

      # only digits and length of 8
      $ lesspass lesspass.com contact@lesspass.com  -d -L8
        master password:
        75837019`;

const cli = meow(helpMessage, {
  alias: {L: 'length', c: 'counter', C: 'clipboard'},
  boolean: ['l', 'u', 'd', 's', 'C', 'clipboard']
});


function calcPassword(site, login, masterPassword, passwordProfile) {
  LessPass.generatePassword(site, login, masterPassword, passwordProfile)
    .then(function(generatedPassword) {
      if (passwordProfile.clipboard) {
        clipboardy.write(generatedPassword)
          .then(() => {
            console.log('Copied to clipboard');
            process.exit();
          }).catch(err => {
          console.error(chalk.red('Copy failed.'));
          console.error(err.message);
          process.exit(1);
        });
      } else {
        console.log(generatedPassword);
        process.exit();
      }
    });
}


function hasNoShortOption(options) {
  return !(['l', 'u', 'd', 's'].some(function(shortOption) {
    return typeof options[shortOption] !== 'undefined' && options[shortOption];
  }));
}

function getOptionBoolean(options, optionString) {
  let shortOption = optionString.substring(0, 1);
  if (options[shortOption]) {
    return true;
  }
  if (typeof options[optionString] === 'undefined') {
    return hasNoShortOption(options);
  }
  return options[optionString]
}

const lowercase = getOptionBoolean(cli.flags, 'lowercase');
const uppercase = getOptionBoolean(cli.flags, 'uppercase');
const symbols = getOptionBoolean(cli.flags, 'symbols');
const digits = getOptionBoolean(cli.flags, 'digits');

const passwordProfile = {
  lowercase: lowercase,
  uppercase: uppercase,
  symbols: symbols,
  numbers: digits,
  clipboard: cli.flags.clipboard || false,
  length: cli.flags.length || 16,
  counter: cli.flags.counter || 1
};

const site = cli.input[0];
const login = cli.input[1];

if (typeof  site === 'undefined' && typeof login === 'undefined') {
  console.log(chalk.red('site or login cannot be empty'));
  console.log('type lesspass --help');
  process.exit(-1);
}


if (cli.input.length === 3) {
  const masterPassword = cli.input[2];
  calcPassword(site, login, masterPassword, passwordProfile)
} else {
  read({prompt: 'master password: ', silent: true}, function(er, password) {
    calcPassword(site, login, password, passwordProfile)
  });
}