var commands = require('./commands');
var rpc = require('./jsonrpc');

function Client(opts) {
  this.rpc = new rpc.Client(opts);
};

Client.prototype.cmd = function() {
  var args = [].slice.call(arguments);
  var cmd = args.shift();

  callRpc(cmd, args, this.rpc);
};

function callRpc (cmd, args, rpc) {
  var fn = args[args.length - 1];

  // If the last argument is a callback, pop it from the args list
  if (typeof fn === 'function') {
    args.pop();
  } else {
    fn = function () {};
  }

  rpc.call(cmd, args, function () {
    var args = [].slice.call(arguments);
    args.unshift(null);
    fn.apply(this, args);
  }, function(err) {
    fn(err);
  });
};

(function() {
  for (var protoFn in commands) {
    (function(protoFn) {
      Client.prototype[protoFn] = function() {
        var args = [].slice.call(arguments);
        callRpc(commands[protoFn], args, this.rpc);
      };
    })(protoFn);
  }
})();

module.exports.Client = Client;