'use strict';
import { uuid } from 'utils';

export function Rpc() {
  this.tasks = [];
  var self = this;

  window.addEventListener('message', function (e) {
    //if(e.source!=window.parent) return;
    var data = e.data;
    for (var i = 0, n = self.tasks.length; i < n; i++) {
      var task = self.tasks[i];
      if(task.uuid = data.uuid){
        task.resolve(data.execRes);
        self.tasks.splice(i,1);
        break;
      }
    }
  },false);
}

Rpc.prototype.postMessage = function (data) {
  if(window.parent) window.parent.postMessage(data,'*');
}

Rpc.prototype.createTask = function (data) {
  data.uuid = uuid();

  var taskResolve;
  var promise = new Promise(function (resolve) {
    taskResolve = resolve;
  });
  var task = Object.assign({},data);
  task.resolve = taskResolve;
  this.tasks.push(task);

  this.postMessage(data); // 发送
  return promise;
}

Rpc.prototype.runMethod = function () {
  var args = Array.prototype.slice.apply(arguments);
  var name = args[0];
  var params;
  if(args.length > 1){
    args.shift();
    params = args;
  }else{
    params = [];
  }
  return this.createTask({
    type: 'method',
    name: name,
    params: params
  });
}

Rpc.prototype.runMethodWithoutReturn = function () {
  var args = Array.prototype.slice.apply(arguments);
  var name = args[0];
  var params;
  if(args.length > 1){
    args.shift();
    params = args;
  }else{
    params = [];
  }
  this.postMessage({
    type: 'method',
    name: name,
    params: params
  })
}

Rpc.prototype.sendMessage = function (name,params) {
  return this.createTask({ type: 'message', name:name, params:params });
}