var gulp = require('gulp');
var rev = require('gulp-rev');
var revReplace = require('gulp-rev-replace');
var useref = require('gulp-useref');
var filter = require('gulp-filter');
var uglify = require('gulp-uglify');
var csso = require('gulp-csso');

gulp.task("index", function() {
  var jsFilter = filter("**/*.js", { restore: true });
  var cssFilter = filter("**/*.css", { restore: true });
  var indexHtmlFilter = filter(['**/*', '!**/index.html'], { restore: true });

  return gulp.src("src/index.html")
    .pipe(useref())      // Concatenate with gulp-useref
    .pipe(jsFilter)
    .pipe(uglify())             // Minify any javascript sources
    .pipe(jsFilter.restore)
    .pipe(cssFilter)
    .pipe(csso())               // Minify any CSS sources
    .pipe(cssFilter.restore)
    .pipe(indexHtmlFilter)
    .pipe(rev())                // Rename the concatenated files (but not index.html)
    .pipe(indexHtmlFilter.restore)
    .pipe(revReplace())         // Substitute in new filenames
    .pipe(gulp.dest('public'));
});

var rev = require("gulp-rev");
var revReplace = require("gulp-rev-replace");
gulp.task("revision", ["dist:css", "dist:js"], function(){
  return gulp.src(["dist/**/*.css", "dist/**/*.js"])
    .pipe(rev())
    .pipe(gulp.dest(opt.distFolder))
    .pipe(rev.manifest())
    .pipe(gulp.dest(opt.distFolder))
})

gulp.task("revreplace", ["revision"], function(){
  var manifest = gulp.src("./" + opt.distFolder + "/rev-manifest.json");

  return gulp.src(opt.srcFolder + "/index.html")
    .pipe(revReplace({manifest: manifest}))
    .pipe(gulp.dest(opt.distFolder));
});

{"js/app.js.map": "js/app-98adc164.js.map"}

function replaceJsIfMap(filename) {
    if (filename.indexOf('.map') > -1) {
        return filename.replace('js/', '');
    }
    return filename;
}

return gulp.src(opt.distFolder + '**/*.js')
    .pipe(revReplace({
        manifest: manifest,
        modifyUnreved: replaceJsIfMap,
        modifyReved: replaceJsIfMap
    }))
    .pipe(gulp.dest(opt.distFolder));