'use strict';

/**
 * Action: FunctionRunLambdaNodeJs
 */


module.exports = function (SPlugin, serverlessPath) {

  const SPlugin = require('../ServerlessPlugin'),
    SError = require('../ServerlessError'),
    SCli = require('../utils/cli'),
    async = require('async'),
    path = require('path'),
    BbPromise = require('bluebird');


  class CodeEventDeployLambda extends SPlugin {

    constructor(S, config) {
      super(S, config);
    }

    static getName() {
      return 'serverless.core.' + CodeEventDeployLambda.name;
    }

    registerActions() {

      this.S.addAction(this.codeEventDeployLambda.bind(this), {
        handler: 'codeEventDeployLambda',
        description: 'Creates an event source for a lambda function.'
      });


      return BbPromise.resolve();
    }

    /**
     * Create Event Source for a Lambda Function
     */


    codeEventDeployLambda(evt) {
      let _this = this;
      if (!evt.function.event[0].EventSourceArn) return evt;

      // Load AWS Service Instances
      let awsConfig = {
        region: evt.region.region,
        accessKeyId: _this.S._awsAdminKeyId,
        secretAccessKey: _this.S._awsAdminSecretKey,
      };

      return new BbPromise(function (resolve, reject) {


        async.eachLimit(evt.function.event, 5, function (event, cb) {

          // Create new evt object for concurrent operations
          let params = event;

          params.FunctionName = _this.Lambda.sGetLambdaName(_this.S._projectJson, evt.function);

          return _this.Lambda.createEventSourceMappingPromised(params)
            .then(function (data) {

              SCli.sDebug(`Created event source ${event.EventSourceArn} for lambda ${evt.function.name}`);

              evt.function.event.UUID = data.UUID;
              return cb();
            })
            .catch(function (e) {
              if (e.code === 'ResourceConflictException') {

                SCli.sDebug(`Event source ${event.EventSourceArn} already exists for lambda ${evt.function.name}`);

                return cb();
              } else {
                throw new SError(`Error setting lambda event source: ` + e);
              }
            })

        }, function () {
          return resolve(evt);
        });
      });


    }


  }

  return ( CodeEventDeployLambda );
};