/*global module*/
module.exports = function (content) {
  var fs = require('fs');
  var path = require('path');
  var target = this.resourcePath;
  var targetPath = path.dirname(target);
  var targetFileName = path.basename(target);
  if(!fs.existsSync(target)){
    this.emitError(target + ' not exist!');
    return;
  }


  var getJsonFromAmdFile = function(content){
      var sandbox = {
        json:'',
        module : {},
        exports : {}
      };
      
      var _d = "function define(i, d, o) {if(!o) {if(!d) {return i;}return d;}return o;}"

      var vm = require('vm');
      var context = vm.createContext(sandbox);
      var script = new vm.Script(_d+"\nvar ret="+content +";this._json = ret;");
      script.runInContext(context);
      if(context._json && typeof context._json === 'object') {
          return context._json;
      }
      return sandbox.json || (sandbox.module && sandbox.module.exports);
  };

  var json = getJsonFromAmdFile(content);

  var ret = {},
      __content;

  ret.__root = !json ? {root:true} : json.root;
  for(var language in json){
    if(language === 'root' && typeof json[language] === 'object') {
        continue;
    }
    var targetFile = path.join(targetPath,language,targetFileName);
    if(!fs.existsSync(targetFile)){
        this.emitError(targetFile + 'not exist!');
        return;
    }
    __content = fs.readFileSync(targetFile,'utf8');
    ret['__' + language] = getJsonFromAmdFile(__content);
  }

  var retStr = 'var amdi18n=' + JSON.stringify(ret) + ';';

  var init = function(language){
    if(!language){
        if(window._i18n && window._i18n.locale){
            language = window._i18n.locale;
        }else{
            language = 'root';
        }
    }
    if (Object.assign) {
        Object.assign(this,this.__root,this['__'+language]);
    } else {
        var target = this['__' + language] || this.__root;
        if (target) {
            for (var name in target) {
                this[name] = target[name];
            }
        }
    }
  };

  retStr += 'amdi18n.init=' + init.toString() + ';';
  retStr += 'amdi18n.init();';
  retStr += 'module.exports=amdi18n;';

  this.cacheable && this.cacheable();
  this.value = content;
  return retStr;
};