let async = require('async');

// TODO: make all of this async
class GethCommands {
  constructor(options) {
    this.config = options && options.hasOwnProperty('config') ? options.config : {};
    this.env = options && options.hasOwnProperty('env') ? options.env : 'development';
    this.name = "Go-Ethereum (https://github.com/ethereum/go-ethereum)";
    this.geth_bin = this.config.geth_bin || "geth";
  }

  commonOptions() {
    let config = this.config;
    let cmd = "";

    cmd += this.determineNetworkType(config);

    if (config.datadir) {
      cmd += "--datadir=\"" + config.datadir + "\" ";
    }

    if (config.light) {
      cmd += "--light ";
    }

    if (config.fast) {
      cmd += "--fast ";
    }

    if (config.account && config.account.password) {
      cmd += "--password " + config.account.password + " ";
    }

    return cmd;
  }

  determineVersion() {
    return this.geth_bin + " version";
  }

  determineNetworkType(config) {
    let cmd = "";
    if (config.networkType === 'testnet') {
      cmd += "--testnet ";
    } else if (config.networkType === 'olympic') {
      cmd += "--olympic ";
    } else if (config.networkType === 'custom') {
      cmd += "--networkid " + config.networkId + " ";
    }
    return cmd;
  }

  initGenesisCommmand() {
    let config = this.config;
    let cmd = this.geth_bin + " " + this.commonOptions();

    if (config.genesisBlock) {
      cmd += "init \"" + config.genesisBlock + "\" ";
    }

    return cmd;
  }

  newAccountCommand() {
    return this.geth_bin + " " + this.commonOptions() + "account new ";
  }

  listAccountsCommand() {
    return this.geth_bin + " " + this.commonOptions() + "account list ";
  }

  determineRpcOptions(config) {
    let cmd = "";

    cmd += "--port " + config.port + " ";
    cmd += "--rpc ";
    cmd += "--rpcport " + config.rpcPort + " ";
    cmd += "--rpcaddr " + config.rpcHost + " ";
    if (config.rpcCorsDomain) {
      if (config.rpcCorsDomain === '*') {
        console.log('==================================');
        console.log('rpcCorsDomain set to *');
        console.log('make sure you know what you are doing');
        console.log('==================================');
      }
      cmd += "--rpccorsdomain=\"" + config.rpcCorsDomain + "\" ";
    } else {
      console.log('==================================');
      console.log('warning: cors is not set');
      console.log('==================================');
    }

    return cmd;
  }

  determineWsOptions(config) {
    let cmd = "";

    if (config.wsRPC) {
      cmd += "--ws ";
      cmd += "--wsport " + config.wsPort + " ";
      cmd += "--wsaddr " + config.wsHost + " ";
      if (config.wsOrigins) {
        if (config.wsOrigins === '*') {
          console.log('==================================');
          console.log('wsOrigins set to *');
          console.log('make sure you know what you are doing');
          console.log('==================================');
        }
        cmd += "--wsorigins \"" + config.wsOrigins + "\" ";
      } else {
        console.log('==================================');
        console.log('warning: wsOrigins is not set');
        console.log('==================================');
      }
    }

    return cmd;
  }

  mainCommand(address, done) {
    let self = this;
    let config = this.config;
    let rpc_api = (this.config.rpcApi || ['eth', 'web3', 'net']);
    let ws_api = (this.config.wsApi || ['eth', 'web3', 'net']);

    async.series([
      function commonOptions(callback) {
        let cmd = self.commonOptions();
        callback(null, cmd);
      },
      function rpcOptions(callback) {
        let cmd = self.determineRpcOptions(self.config);
        callback(null, cmd);
      },
      function wsOptions(callback) {
        let cmd = self.determineWsOptions(self.config);
        callback(null, cmd);
      },
      function dontGetPeers(callback) {
        if (config.nodiscover) {
          return callback(null, "--nodiscover");
        }
        callback(null, "");
      },
      function vmDebug(callback) {
        if (config.vmdebug) {
          return callback(null, "--vmdebug");
        }
        callback(null, "");
      },
      function maxPeers(callback) {
        let cmd = "--maxpeers " + config.maxpeers;
        callback(null, cmd);
      },
      function mining(callback) {
        if (config.mineWhenNeeded || config.mine) {
          return callback(null, "--mine ");
        }
        callback("");
      },
      function bootnodes(callback) {
        if (config.bootnodes && config.bootnodes !== "" && config.bootnodes !== []) {
          return callback(null, "--bootnodes " + config.bootnodes);
        }
        callback("");
      },
      function whisper(callback) {
        if (config.whisper) {
          rpc_api.push('shh');
          if (ws_api.indexOf('shh') === -1) {
            ws_api.push('shh');
          }
          return callback(null, "--shh ");
        }
        callback("");
      },
      function rpcApi(callback) {
        callback(null, '--rpcapi "' + rpc_api.join(',') + '"');
      },
      function wsApi(callback) {
        callback(null, '--wsapi "' + ws_api.join(',') + '"');
      },
      function accountToUnlock(callback) {
        let accountAddress = "";
        if(config.hasOwnProperty('address') && config.account.hasOwnProperty('address')) {
          accountAddress = config.account.address;
        } else {
          accountAddress = address;
        }
        if (accountAddress) {
          return callback(null, "--unlock=" + accountAddress);
        }
        callback(null, "");
      },
      function gasLimit(callback) {
        if (config.targetGasLimit) {
          return callback(null, "--targetgaslimit " + config.targetGasLimit);
        }
        callback(null, "");
      },
      function mineWhenNeeded(callback) {
        if (config.mineWhenNeeded) {
          return callback(null, "js .embark/" + self.env + "/js/mine.js");
        }
        callback(null, "");
      }
    ], function (err, results) {
      if (err) {
        throw new Error(err.message);
      }
      done(self.geth_bin + " " + results.join(" "));
    });
  }
}

module.exports = GethCommands;