var gulp = require('gulp');
var zip = require('gulp-zip');
var del = require('del');
var install = require('gulp-install');
var runSequence = require('run-sequence');
var awsLambda = require("node-aws-lambda");

gulp.task('clean', function() {
  return del(['./dist', './dist.zip']);
});

gulp.task('js', function() {
  return gulp.src('index.js')
    .pipe(gulp.dest('dist/'));
});

gulp.task('node-mods', function() {
  return gulp.src('./package.json')
    .pipe(gulp.dest('dist/'))
    .pipe(install({production: true}));
});

gulp.task('zip', function() {
  return gulp.src(['dist/**/*', '!dist/package.json'])
    .pipe(zip('dist.zip'))
    .pipe(gulp.dest('./'));
});

gulp.task('upload', function(callback) {
  awsLambda.deploy('./dist.zip', require("./lambda-config.js"), callback);
});

gulp.task('deploy', function(callback) {
  return runSequence(
    ['clean'],
    ['js', 'node-mods'],
    ['zip'],
    ['upload'],
    callback
  );
});

module.exports = {
  accessKeyId: <access key id>,  // optional
  secretAccessKey: <secret access key>,  // optional
  sessionToken: <sessionToken for assuming roles>,  // optional
  profile: <shared credentials profile name>, // optional for loading AWS credential from custom profile
  region: 'us-east-1',
  handler: 'index.handler',
  role: <role arn>,
  functionName: <function name>,
  timeout: 10,
  memorySize: 128,
  publish: true, // default: false,
  runtime: 'nodejs4.3', // default: 'nodejs4.3',
  vpc: { // optional
    SecurityGroupIds: [<security group id>, ...],
    SubnetIds: [<subnet id>, ...]
  },
  eventSource: {
    EventSourceArn: <event source such as kinesis ARN>,
    BatchSize: 200,
    StartingPosition: "TRIM_HORIZON"
  }
}