const program = require('commander');
const EmbarkController = require('./cmd_controller.js');
const i18n = require('../lib/core/i18n/i18n.js');
const utils = require('../lib/utils/utils.js');

let embark = new EmbarkController;

// set PWD to process.cwd() since Windows doesn't have a value for PWD
if (!process.env.PWD) {
  process.env.PWD = process.cwd();
}

// set the anchor for embark's fs.dappPath()
if (!process.env.DAPP_PATH) {
  process.env.DAPP_PATH = process.env.PWD;
}

// set the anchor for embark's fs.embarkPath()
if (!process.env.EMBARK_PATH) {
  process.env.EMBARK_PATH = utils.joinPath(__dirname, '..');
}

// NOTE: setting NODE_PATH at runtime won't effect lookup behavior in the
// current process, but will take effect in child processes; this enables
// lookup of *global* embark's own node_modules from within dapp scripts (such
// as an ejected webpack.config.js), making embark's dependencies trasitive
// dependencies of a dapp without the dapp explicitly specifying embark as a
// dependency in the dapp's package.json
process.env.NODE_PATH = utils.joinPath(process.env.EMBARK_PATH, 'node_modules') +
  (process.env.NODE_PATH ? require('path').delimiter : '') +
  (process.env.NODE_PATH || '');

function checkDeps() {
  const path = require('path');
  try {
    const dappPackage = require(path.join(process.cwd(), 'package.json'));
    require(path.join(process.cwd(), 'embark.json')); // Make sure we are in a Dapp
    require('check-dependencies')(dappPackage, (state) => {
      if (state.status) {
        require('colors');
        console.error('\nMissing dependencies. Please run npm install'.red);
        process.exit();
      }
      return true;
    });
  } catch (_e) {
    // We are not in a Dapp
    return true;
  }
}

class Cmd {
  constructor() {
    program.version(embark.version);
  }

  process(args) {
    this.newApp();
    this.demo();
    this.build();
    this.run();
    this.console();
    this.blockchain();
    this.simulator();
    this.test();
    this.reset();
    this.ejectWebpack();
    this.graph();
    this.upload();
    this.versionCmd();
    this.helpCmd();
    this.otherCommands();

    //If no arguments are passed display help by default
    if (!process.argv.slice(2).length) {
      program.help();
    }

    program.parse(args);
  }

  newApp() {

    let validateName = function(value) {
      try {
        if (value.match(/^[a-zA-Z\s-]+$/)) return value;
      } catch (e) {
        throw new Error(__('Name must be only letters, spaces, or dashes'));
      }
    };

    program
      .command('new [name]')
      .description(__('New Application'))
      .option('--simple', __('create a barebones project meant only for contract development'))
      .option('--locale [locale]', __('language to use (default: en)'))
      .option('--template [url]', __('download template'))
      .action(function(name, options) {
        i18n.setOrDetectLocale(options.locale);
        if (name === undefined) {
          const promptly = require('promptly');
          return promptly.prompt(__("Name your app (default is %s):", 'embarkDapp'), {
            default: "embarkDApp",
            validator: validateName
          }, function(err, inputvalue) {
            if (err) {
              console.error(__('Invalid name') + ':', err.message);
              // Manually call retry
              // The passed error has a retry method to easily prompt again.
              err.retry();
            } else {
              //slightly different assignment of name since it comes from child prompt
              if (options.simple) {
                embark.generateTemplate('simple', './', inputvalue);
              } else {
                embark.generateTemplate('boilerplate', './', inputvalue, options.template);
              }
            }
          });
        }
        if (options.simple) {
          embark.generateTemplate('simple', './', name);
        } else {
          embark.generateTemplate('boilerplate', './', name, options.template);
        }
      });
  }

  demo() {
    program
      .command('demo')
      .option('--locale [locale]', __('language to use (default: en)'))
      .description(__('create a working dapp with a SimpleStorage contract'))
      .action(function(options) {
        i18n.setOrDetectLocale(options.locale);
        embark.generateTemplate('demo', './', 'embark_demo');
      });
  }

  build() {
    program
      .command('build [environment]')
      .option('--contracts', 'only compile contracts into Embark wrappers')
      .option('--logfile [logfile]', __('filename to output logs (default: none)'))
      .option('-c, --client [client]', __('Use a specific ethereum client (supported: %s)', 'geth'))
      .option('--loglevel [loglevel]', __('level of logging to display') + ' ["error", "warn", "info", "debug", "trace"]', /^(error|warn|info|debug|trace)$/i, 'debug')
      .option('--locale [locale]', __('language to use (default: en)'))
      .option('--pipeline [pipeline]', __('webpack config to use (default: production)'))
      .description(__('deploy and build dapp at ') + 'dist/ (default: development)')
      .action(function(env, _options) {
        checkDeps();
        i18n.setOrDetectLocale(_options.locale);
        _options.env = env || 'development';
        _options.logFile = _options.logfile; // fix casing
        _options.logLevel = _options.loglevel; // fix casing
        _options.onlyCompile = _options.contracts;
        _options.client = _options.client || 'geth';
        _options.webpackConfigName = _options.pipeline || 'production';
        embark.build(_options);
      });
  }

  run() {
    program
      .command('run [environment]')
      .option('-p, --port [port]', __('port to run the dev webserver (default: %s)', '8000'))
      .option('-c, --client [client]', __('Use a specific ethereum client (supported: %s)', 'geth'))
      .option('-b, --host [host]', __('host to run the dev webserver (default: %s)', 'localhost'))
      .option('--noserver', __('disable the development webserver'))
      .option('--nodashboard', __('simple mode, disables the dashboard'))
      .option('--no-color', __('no colors in case it\'s needed for compatbility purposes'))
      .option('--logfile [logfile]', __('filename to output logs (default: %s)', 'none'))
      .option('--loglevel [loglevel]', __('level of logging to display') + ' ["error", "warn", "info", "debug", "trace"]', /^(error|warn|info|debug|trace)$/i, 'debug')
      .option('--locale [locale]', __('language to use (default: en)'))
      .option('--pipeline [pipeline]', __('webpack config to use (default: development)'))
      .description(__('run dapp (default: %s)', 'development'))
      .action(function(env, options) {
        checkDeps();
        i18n.setOrDetectLocale(options.locale);
        embark.run({
          env: env || 'development',
          serverPort: options.port,
          serverHost: options.host,
          client: options.client || 'geth',
          locale: options.locale,
          runWebserver: !options.noserver,
          useDashboard: !options.nodashboard,
          logFile: options.logfile,
          logLevel: options.loglevel,
          webpackConfigName: options.pipeline || 'development'
        });
      });
  }

  console() {
    program
      .command('console [environment]')
      .option('-c, --client [client]', __('Use a specific ethereum client (supported: %s)', 'geth'))
      .option('--logfile [logfile]', __('filename to output logs (default: %s)', 'none'))
      .option('--loglevel [loglevel]', __('level of logging to display') + ' ["error", "warn", "info", "debug", "trace"]', /^(error|warn|info|debug|trace)$/i, 'debug')
      .option('--locale [locale]', __('language to use (default: en)'))
      .option('--pipeline [pipeline]', __('webpack config to use (default: development)'))
      .description(__('Start the Embark console'))
      .action(function(env, options) {
        checkDeps();
        i18n.setOrDetectLocale(options.locale);
        embark.console({
          env: env || 'development',
          client: options.client || 'geth',
          locale: options.locale,
          logFile: options.logfile,
          logLevel: options.loglevel,
          webpackConfigName: options.pipeline || 'development'
        });
      });
  }

  blockchain() {
    program
      .command('blockchain [environment]')
      .option('-c, --client [client]', __('Use a specific ethereum client (supported: %s)', 'geth'))
      .option('--locale [locale]', __('language to use (default: en)'))
      .description(__('run blockchain server (default: %s)', 'development'))
      .action(function(env, options) {
        checkDeps();
        i18n.setOrDetectLocale(options.locale);
        embark.initConfig(env || 'development', {
          embarkConfig: 'embark.json',
          interceptLogs: false
        });
        embark.blockchain(env || 'development', options.client || 'geth');
      });
  }

  simulator() {
    program
      .command('simulator [environment]')
      .description(__('run a fast ethereum rpc simulator'))
      .option('--testrpc', __('use testrpc as the rpc simulator [%s]', 'default'))
      .option('-p, --port [port]', __('port to run the rpc simulator (default: %s)', '8545'))
      .option('-h, --host [host]', __('host to run the rpc simulator (default: %s)', 'localhost'))
      .option('-a, --accounts [numAccounts]', __('number of accounts (default: %s)', '10'))
      .option('-e, --defaultBalanceEther [balance]', __('Amount of ether to assign each test account (default: %s)', '100'))
      .option('-l, --gasLimit [gasLimit]', __('custom gas limit (default: %s)', '8000000'))
      .option('--locale [locale]', __('language to use (default: en)'))

      .action(function(env, options) {
        checkDeps();
        i18n.setOrDetectLocale(options.locale);
        embark.initConfig(env || 'development', {
          embarkConfig: 'embark.json',
          interceptLogs: false
        });
        embark.simulator({
          port: options.port,
          host: options.host,
          numAccounts: options.numAccounts,
          defaultBalance: options.balance,
          gasLimit: options.gasLimit
        });
      });
  }

  test() {
    program
      .command('test [file]')
      .option('-n , --node <node>', __('Node to connect to. Valid values are ["vm", "embark", "<custom node endpoint>"]: \n') +
              '                       vm - ' + __('Starts an Ethereum simulator (ganache) and runs the tests using the simulator') + '\n' +
              '                       embark - ' + __('Uses the node associated with an already running embark process') + '\n' +
              '                       ' + __('<custom node endpoint> - Connects to a running node available at the end point and uses it to run the tests'))
      .option('-d , --gasDetails', __('When set, will print the gas cost for each contract deploy'))
      .option('-c , --coverage', __('When set, will generate the coverage after the tests'))
      .option('--locale [locale]', __('language to use (default: en)'))
      .option('--loglevel [loglevel]', __('level of logging to display') + ' ["error", "warn", "info", "debug", "trace"]', /^(error|warn|info|debug|trace)$/i, 'warn')
      .description(__('run tests'))
      .action(function(file, options) {
        const node = options.node || 'vm';
        const urlRegexExp = /^(vm|embark|((ws|https?):\/\/([a-zA-Z0-9_.-]*):?([0-9]*)?))$/i;
        if (!(node === 'embark' || node === 'vm' || node.match(urlRegexExp))) {
          console.error(`invalid --node option: must be 'vm', 'embark' or a valid URL`.red);
          process.exit(1);
        }
        options.node = node;
        checkDeps();
        i18n.setOrDetectLocale(options.locale);
        embark.runTests({file, loglevel: options.loglevel, gasDetails: options.gasDetails,
          node: options.node, coverage: options.coverage});
      });
  }

  upload() {
    program
      .command('upload [environment]')
      .option('--ens [ensDomain]', __('ENS domain to associate to'))
      .option('--logfile [logfile]', __('filename to output logs (default: %s)', 'none'))
      .option('--loglevel [loglevel]', __('level of logging to display') + ' ["error", "warn", "info", "debug", "trace"]', /^(error|warn|info|debug|trace)$/i, 'debug')
      .option('--locale [locale]', __('language to use (default: en)'))
      .option('-c, --client [client]', __('Use a specific ethereum client (supported: %s)', 'geth'))
      .option('--pipeline [pipeline]', __('webpack config to use (default: production)'))
      .description(__('Upload your dapp to a decentralized storage') + '.')
      .action(function(env, _options) {
        checkDeps();
        i18n.setOrDetectLocale(_options.locale);
        if (env === "ipfs" || env === "swarm") {
          console.warn(("did you mean " + "embark upload".bold + " ?").underline);
          console.warn("In embark 3.1 forwards, the correct command is embark upload <environment> and the provider is configured in config/storage.js");
        }
        _options.env = env || 'development';
        _options.ensDomain = _options.ens;
        _options.logFile = _options.logfile; // fix casing
        _options.logLevel = _options.loglevel; // fix casing
        _options.client = _options.client || 'geth';
        _options.webpackConfigName = _options.pipeline || 'production';
        embark.upload(_options);
      });
  }

  graph() {
    program
      .command('graph [environment]')
      .option('--skip-undeployed', __('Graph will not include undeployed contracts'))
      .option('--skip-functions', __('Graph will not include functions'))
      .option('--skip-events', __('Graph will not include events'))
      .option('--locale [locale]', __('language to use (default: en)'))
      .description(__('generates documentation based on the smart contracts configured'))
      .action(function(env, options) {
        checkDeps();
        i18n.setOrDetectLocale(options.locale);
        embark.graph({
          env: env || 'development',
          logFile: options.logfile,
          skipUndeployed: options.skipUndeployed,
          skipFunctions: options.skipFunctions,
          skipEvents: options.skipEvents
        });
      });
  }

  reset() {
    program
      .command('reset')
      .option('--locale [locale]', __('language to use (default: en)'))
      .description(__('resets embarks state on this dapp including clearing cache'))
      .action(function(options) {
        i18n.setOrDetectLocale(options.locale);
        embark.initConfig('development', {
          embarkConfig: 'embark.json', interceptLogs: false
        });
        embark.reset();
      });
  }

  ejectWebpack() {
    program
      .command('eject-webpack')
      .description(__('copy the default webpack config into your dapp for customization'))
      .action(function() {
        embark.initConfig('development', {
          embarkConfig: 'embark.json',
          interceptLogs: false
        });
        embark.ejectWebpack();
      });
  }

  versionCmd() {
    program
      .command('version')
      .description(__('output the version number'))
      .action(function() {
        console.log(embark.version);
        process.exit(0);
      });
  }

  helpCmd() {
    program
      .command('help')
      .description(__('output usage information and help information'))
      .action(function() {
        console.log("Documentation can be found at: ".green + "https://embark.status.im/docs/".underline.green);
        console.log("");
        console.log("Have an issue? submit it here: ".green + "https://github.com/embark-framework/embark/issues/new".underline.green);
        console.log("or chat with us directly at: ".green + "https://gitter.im/embark-framework/Lobby".underline.green);
        program.help();
        process.exit(0);
      });
  }

  otherCommands() {
    program
      .action(function(cmd) {
        console.log((__('unknown command') + ' "%s"').red, cmd);
        let utils = require('../lib/utils/utils.js');
        let dictionary = ['new', 'demo', 'build', 'run', 'blockchain', 'simulator', 'test', 'upload', 'version'];
        let suggestion = utils.proposeAlternative(cmd, dictionary);
        if (suggestion) {
          console.log((__('did you mean') + ' "%s"?').green, suggestion);
        }
        console.log("type embark --help to see the available commands");
        process.exit(0);
      });
  }

}

module.exports = Cmd;