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// Plug-ins
// ------------------------------
var gulp         = require('gulp'),
    sass         = require('gulp-ruby-sass'),
    autoprefixer = require('gulp-autoprefixer'),
    minifycss    = require('gulp-minify-css'),
    jshint       = require('gulp-jshint'),
    uglify       = require('gulp-uglify'),
    imagemin     = require('gulp-imagemin'),
    rename       = require('gulp-rename'),
    clean        = require('gulp-clean'),
    concat       = require('gulp-concat'),
    notify       = require('gulp-notify'),
    cache        = require('gulp-cache'),
    livereload   = require('gulp-livereload'),
    minifyhtml   = require('gulp-minify-html'),
    
    project = {
      name: 'name-of-the-repo-here',
    },
    paths = {
      build:   ['build/', project.name],
      styles:  {
        source: 'source/styles/**/*.*',
        dev:    'build/styles',
        pro:    project.name + '/styles'
      },
      scripts: {
        source: ['source/scripts/**/*.js', '!source/scripts/lib/**/*.js'],
        dev:    'build/scripts',
        pro:    project.name + '/scripts'
      },
      images: {
        source: 'source/images/**/*',
        dev:    'build/images',
        pro:    project.name + '/images'
      },
      html : {
        source: './*.html',
        dev:    'build',
        pro:    project.name
      }
    };


// Clean task
// ------------------------------
gulp.task('clean', function() {
  return gulp.src(paths.build, {read: false})
    .pipe(clean());
});


// Styles task
// ------------------------------
gulp.task('styles', function() {
  return gulp.src(paths.styles.source)
    .pipe(sass({
      style: 'expanded',
      lineNumbers: true
    }))
    .pipe(autoprefixer('last 2 version', 'safari 5', 'ie 8', 'ie 9', 'opera 12.1', 'ios 6', 'android 4'))
    .pipe(concat('main.css'))
    .pipe(gulp.dest(paths.styles.dev))
    .pipe(rename({
      suffix: '.min'
    }))
    .pipe(minifycss({
      debug: true
    }))
    .pipe(gulp.dest(paths.styles.pro))
    .pipe(notify({
      message: 'Styles task complete'
    }));
});


// Scripts task
// ------------------------------
gulp.task('scripts', function() {
  return gulp.src(paths.scripts.source)
    .pipe(jshint('.jshintrc'))
    .pipe(jshint.reporter('default'))
    .pipe(concat('main.js'))
    .pipe(gulp.dest(paths.scripts.dev))
    .pipe(rename({
      suffix: '.min'
    }))
    .pipe(uglify())
    .pipe(gulp.dest(paths.scripts.pro))
    .pipe(notify({
      message: 'Scripts task complete'
    }));
});


// Images task
// ------------------------------
gulp.task('images', function() {
  return gulp.src(paths.images.source)
    .pipe(cache(imagemin({
      optimizationLevel: 3,
      progressive: true,
      interlaced: true
    })))
    .pipe(gulp.dest(paths.images.dev))
    .pipe(gulp.dest(paths.images.pro))
    .pipe(notify({
      message: 'Images task complete'
    }));
});


// HTML task
// ------------------------------
gulp.task('html', function() {
  return gulp.src(paths.html.source)
    .pipe(minifyhtml())
    .pipe(gulp.dest(paths.html.dev))
    .pipe(gulp.dest(paths.html.pro))
    .pipe(notify({
      message: 'HTML task complete'
    }));
});


// Default task
// ------------------------------
// It’s advised against using gulp.start in favour of executing tasks in the dependency arrary, but in this scenario to ensure clean fully completes, it seems the best option.
gulp.task('default', ['clean'], function() {
    gulp.start('styles', 'scripts', 'images');
});

// Watch task
// ------------------------------
gulp.task('watch', function() {
  gulp.watch(project.paths.styles, ['styles']);
  gulp.watch(project.paths.scripts, ['scripts']);
  gulp.watch(project.paths.images, ['images']);
  
  // Create LiveReload server
  var server = livereload();

  // Watch any files in build/, reload on change
  gulp.watch(['build/**']).on('change', function(file) {
    server.changed(file.path);
  });
});