let colors = require('colors');
let async = require('async');
let shelljs = require('shelljs');

class Swarm {
  constructor(options) {
    this.options = options;
    this.buildDir = options.buildDir || 'dist/';
  }

  deploy() {
    let self = this;
    async.waterfall([
      function findBinary(callback) {
        let swarm_bin = shelljs.exec('which swarm').output.split("\n")[0];

        if (swarm_bin === 'swarm not found' || swarm_bin === '') {
          console.log('=== WARNING: Swarm not in an executable path. Guessing ~/go/bin/swarm for path'.yellow);
          swarm_bin = "~/go/bin/swarm";
        }

        return callback(null, swarm_bin);
      },
      function runCommand(swarm_bin, callback) {
        let cmd = swarm_bin + " --defaultpath " + self.buildDir + "index.html --recursive up " + self.buildDir;
        console.log(("=== adding " + self.buildDir + " to swarm").green);
        console.log(cmd.green);
        let result = shelljs.exec(cmd);

        return callback(null, result);
      },
      function getHashFromOutput(result, callback) {
        if (result.code !== 0) {
          return callback("couldn't upload, is the swarm daemon running?");
        }

        let rows = result.output.split("\n");
        let dir_hash = rows.reverse()[1];

        return callback(null, dir_hash);
      },
      function printUrls(dir_hash, callback) {
        console.log(("=== DApp available at http://localhost:8500/bzz:/" + dir_hash + "/").green);

        return callback();
      }
    ], function (err, result) {
      if (err) {
        console.log("error uploading to swarm".red);
        console.log(err);
      }
    });
  }
}

module.exports = Swarm;