var colors = require('colors');
var async = require('async');

var IPFS = function(options) {
  this.options = options;
  this.buildDir = options.buildDir || 'dist/';
};

IPFS.prototype.deploy = function() {
  var self = this;
  async.waterfall([
    function findBinary(callback) {
      var ipfs_bin = exec('which ipfs').output.split("\n")[0];

      if (ipfs_bin==='ipfs not found'){
        console.log('=== WARNING: IPFS not in an executable path. Guessing ~/go/bin/ipfs for path'.yellow);
        ipfs_bin = "~/go/bin/ipfs";
      }

      return callback(null, ipfs_bin);
    },
    function runCommand(ipfs_bin, callback) {
      var cmd = ipfs_bin + " add -r " + self.buildDir;
      console.log(("=== adding " + self.buildDir + " to ipfs").green);
      console.log(cmd.green);
      var result = exec(cmd);

      return callback(null, result);
    },
    function getHashFromOutput(result, callback) {
      var rows = result.output.split("\n");
      var dir_row = rows[rows.length - 2];
      var dir_hash = dir_row.split(" ")[1];

      return callback(null, dir_hash);
    },
    function printUrls(dir_hash, callback) {
      console.log(("=== DApp available at http://localhost:8080/ipfs/" + dir_hash + "/").green);
      console.log(("=== DApp available at http://gateway.ipfs.io/ipfs/" + dir_hash + "/").green);

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

module.exports = IPFS;