/*

ESP8266 file system builder

Copyright (C) 2016-2018 by Xose Pérez <xose dot perez at gmail dot com>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

*/

/*eslint quotes: ["error", "single"]*/
/*eslint-env es6*/

// -----------------------------------------------------------------------------
// File system builder
// -----------------------------------------------------------------------------

const fs = require('fs');
const gulp = require('gulp');
const htmlmin = require('gulp-htmlmin');
const cleancss = require('gulp-clean-css');
const uglify = require('gulp-uglify');
const gzip = require('gulp-gzip');
const inline = require('gulp-inline');
const inlineImages = require('gulp-css-base64');
const favicon = require('gulp-base64-favicon');
const htmllint = require('gulp-htmllint');
const gutil = require('gulp-util');

const dataFolder = 'espurna/data/';
const staticFolder = 'espurna/static/';

String.prototype.replaceAll = function(search, replacement) {
    var target = this;
    return target.split(search).join(replacement);
};

var toHeader = function(filename) {

    var source = dataFolder + filename;
    var destination = staticFolder + filename + '.h';
    var safename = filename.replaceAll('.', '_');

    var wstream = fs.createWriteStream(destination);
    wstream.on('error', function (err) {
        console.log(err);
    });

    var data = fs.readFileSync(source);

    wstream.write('#define ' + safename + '_len ' + data.length + '\n');
    wstream.write('const uint8_t ' + safename + '[] PROGMEM = {')

    for (i=0; i<data.length; i++) {
        if (i % 20 == 0) wstream.write("\n");
        wstream.write('0x' + ('00' + data[i].toString(16)).slice(-2));
        if (i<data.length-1) wstream.write(',');
    }

    wstream.write('\n};')
    wstream.end();

}

function htmllintReporter(filepath, issues) {
	if (issues.length > 0) {
		issues.forEach(function (issue) {
			gutil.log(gutil.colors.cyan('[gulp-htmllint] ') + gutil.colors.white(filepath + ' [' + issue.line + ',' + issue.column + ']: ') + gutil.colors.red('(' + issue.code + ') ' + issue.msg));
		});
		process.exitCode = 1;
	}
}

gulp.task('build_certs', function() {
    toHeader('server.cer');
    toHeader('server.key');
});

gulp.task('buildfs_embeded', ['buildfs_inline'], function() {
    toHeader('index.html.gz');
});

gulp.task('buildfs_inline', function() {
    return gulp.src('html/*.html')
        .pipe(htmllint({
            'failOnError': true,
            'rules': {
                'id-class-style': false,
                'label-req-for': false,
            }
        }, htmllintReporter))
        .pipe(favicon())
        .pipe(inline({
            base: 'html/',
            js: [uglify],
            css: [cleancss, inlineImages],
            disabledTypes: ['svg', 'img']
        }))
        .pipe(htmlmin({
            collapseWhitespace: true,
            removeComments: true,
            minifyCSS: true,
            minifyJS: true
        }))
        .pipe(gzip())
        .pipe(gulp.dest(dataFolder));
})

gulp.task('default', ['buildfs_embeded']);