var gulp = require('gulp');
var gutil = require('gulp-util');
var bower = require('bower');
var concat = require('gulp-concat');
var sass = require('gulp-sass');
var minifyCss = require('gulp-minify-css');
var rename = require('gulp-rename');
var sh = require('shelljs');
var uglify = require("gulp-uglify");
var stripDebug = require('gulp-strip-debug');
var ngAnnotate = require('gulp-ng-annotate');

var paths = {
    sass: ['./scss/**/*.scss'],
    starter: ['./www/js/start/config.js','./www/js/start/controller.js','./www/js/start/directive.js','./www/js/start/factory.js','./www/js/start/filter.js']
};

gulp.task('default', ['sass', 'starter']);

gulp.task('starter', function () {
    gulp.src(paths.starter)
    .pipe(concat('starter.js'))
    .pipe(gulp.dest('./www/js'))
    .pipe(ngAnnotate())
    .pipe(stripDebug())
    .pipe(uglify())
    .pipe(rename({extname: '.min.js'}))
    .pipe(gulp.dest('./www/js/'));
});

gulp.task('sass', function (done) {
    gulp.src(['./scss/ionic.app.scss', './scss/linker.scss'])
    .pipe(sass())
    .on('error', sass.logError)
    .pipe(gulp.dest('./www/css/'))
    .pipe(minifyCss({
        keepSpecialComments: 0
    }))
    .pipe(rename({extname: '.min.css'}))
    .pipe(gulp.dest('./www/css/'))
    .on('end', done);
});

gulp.task('watch', function () {
    gulp.watch(paths.sass, ['sass']);
    gulp.watch(paths.starter, ['starter']);
});

gulp.task('install', ['git-check'], function () {
    return bower.commands.install()
    .on('log', function (data) {
        gutil.log('bower', gutil.colors.cyan(data.id), data.message);
    });
});

gulp.task('git-check', function (done) {
    if (!sh.which('git')) {
        console.log(
            '  ' + gutil.colors.red('Git is not installed.'),
            '\n  Git, the version control system, is required to download Ionic.',
            '\n  Download git here:', gutil.colors.cyan('http://git-scm.com/downloads') + '.',
            '\n  Once git is installed, run \'' + gutil.colors.cyan('gulp install') + '\' again.'
        );
        process.exit(1);
    }
    done();
});