<?php

/**
 * 0) додати директиви кешування в .htaccess
 * 1) в wp-config.php треба до дати
 *    define( 'ICL_DONT_LOAD_LANGUAGES_JS', true );
 * 2) в DIVI треба відключити "Static CSS File Generation" (Divi -> Theme Options -> Builder -> Advanced)
 * 3) створити крон джоб
 *      # dev
 *      0 2 * * * /home/fasoonde/public_html/wp-content/themes/fasoon/bin/optimize_images.sh
 *
 *      # live
 *      0 1 * * * /home/fasoonde/public_html/wp-content/themes/fasoon/bin/optimize_images.sh
 */

if ( is_admin() ) {
    return;
}

// include libs
require_once 'lib/minify/vendor/autoload.php';
use MatthiasMullie\Minify;

require_once 'lib/Qs/Packer/Html.php';


// scripts optimization

if ( ! defined( 'CONCATENATE_SCRIPTS' ) ) {
    define( 'CONCATENATE_SCRIPTS', false );
}

if ( ! defined( 'COMPRESS_SCRIPTS' ) ) {
    define( 'COMPRESS_SCRIPTS', false );
}

define( 'FASOON_THEME_PACKER_DIR', WP_CONTENT_DIR . '/__fasoon' );
define( 'FASOON_THEME_PACKER_DIR_URL', content_url( '/__fasoon' ) );

/**
 * @param string $handle
 * @param string $type script|stylesheet
 *
 * @return array|mixed
 */
function fasoon_theme_register_handle( $handle, $type = 'script' ) {
    $_file = FASOON_THEME_PACKER_DIR . '/packer.config.php';

    if ( ! is_dir( FASOON_THEME_PACKER_DIR ) ) {
        if ( ! mkdir( FASOON_THEME_PACKER_DIR ) ) {
            return false;
        }
    }

    // init config
    if ( ! is_file( $_file ) ) {
        $_config = [
            'stylesheet' => [],
            'script'     => [],
        ];
        $content = "<?php\n\nreturn " . var_export($_config, true) . ';';
        file_put_contents($_file, $content);
    } else {
        $_config = include($_file);
    }

    // register handle
    if ( false === ( $index = array_search( $handle, $_config[$type] ) ) ) {
        $_config[$type][] = $handle;
        $index = array_search( $handle, $_config[$type] );

        // update config
        $content = "<?php\n\nreturn " . var_export($_config, true) . ';';
        file_put_contents($_file, $content);
    }

    return $index;
}

add_action( 'wp_print_scripts', 'fasoon_theme_wp_print_scripts', PHP_INT_MAX );
function fasoon_theme_wp_print_scripts() {
    $delim = ";\n;\n";

    $wp_scripts = wp_scripts();

    $scripts = clone $wp_scripts;
    $scripts->all_deps($scripts->queue);

    $indexes = [];
    foreach ( $scripts->to_do as $handle ) {
        $index = fasoon_theme_register_handle( $handle, 'script' );

        if ( false === $index ) {
            return; // something went wrong!!!
        }

        $indexes[$handle] = $index;
    }

    asort( $indexes, SORT_NUMERIC );
    foreach (array_keys( $indexes ) as $handle ) {
        // exclude scripts with extra 'conditional', 'before' and 'after'
        /** @var _WP_Dependency $handle_obj */
        $handle_obj = $scripts->registered[$handle];
        if ( ! empty( $handle_obj->extra['conditional'] )
             || ! empty( $handle_obj->extra['before'] )
             || ! empty( $handle_obj->extra['after'] )
        ) {
            unset( $indexes[$handle] );
        }

        // remove external scripts
        $url_info = parse_url( $handle_obj->src );
        if ( ! empty( $url_info['host'] ) && $url_info['host'] !== $_SERVER['HTTP_HOST'] ) {
            unset( $indexes[$handle] );
        }
    }
    $packed_file_name = join( '-', $indexes ) . '.js';
    $packed_file_path = FASOON_THEME_PACKER_DIR . '/' . $packed_file_name;
    $packed_file_url = FASOON_THEME_PACKER_DIR_URL . '/' . $packed_file_name;

    if ( ! is_file( $packed_file_path ) ) {
        if ( ! $packed = fopen( $packed_file_path, 'w+' ) ) {
            return;
        }

        $www_path = rtrim( get_home_path(), '/' );

        foreach (array_keys( $indexes ) as $handle ) {
            /** @var _WP_Dependency $handle_obj */
            $handle_obj = $scripts->registered[$handle];

            if ( $handle_obj->src ) {
                if ( 0 === strpos( $handle_obj->src, '/wp-includes' ) ) {
                    $content = file_get_contents( $www_path . $handle_obj->src );
                } else {
                    $src = $handle_obj->src;
                    $site_url = site_url();
                    $site_url = substr( $site_url, strpos( $site_url, '://' ) + 3 );
                    if ( 0 === strpos( $src, 'http' ) ) {
                        $src = substr( $src, strpos( $src, '://' ) + 3 );
                        $src = str_replace( $site_url, '', $src );
                    } elseif ( 0 === strpos( $src, '//' ) ) {
                        $src = substr( $src, 2 );
                        $src = str_replace( $site_url, '', $src );
                    }

                    if ( false === strpos( $src, '.min.js' ) ) {
                        $minifier = new Minify\JS( $www_path . $src );
                        $content = $minifier->minify();
                    } else {
                        $content = file_get_contents( $www_path . $src );
                    }
                }

                $content .= $delim;
                fwrite( $packed, $content );
            }
        }

        fclose( $packed );
    }

    // collect extra['data'] and remove merged scripts
    $data = '';

    /** @var WP_Theme $theme */
    $theme = wp_get_theme();
    if ( 'divi' == strtolower( $theme->get( 'Template' ) ) ) {
        $data .= 'var et_pb_box_shadow_elements = [];' . $delim;  // костиль, якась сволота дописує до інлайн скрипта цю стрічку, не знайшов хто це робить
    }

    foreach (array_keys( $indexes ) as $handle ) {
        /** @var _WP_Dependency $handle_obj */
        $handle_obj = $scripts->registered[ $handle ];

        if ( ! empty( $handle_obj->extra['data'] ) ) {
            $data .= $handle_obj->extra['data'] . $delim;
        }

        $wp_scripts->dequeue( $handle );
    }

    // enqueue merged script
    wp_enqueue_script( 'fasoon_merged_scripts', $packed_file_url, [], false, false );
    $wp_scripts->registered['fasoon_merged_scripts']->extra['data'] = $data;
}

add_filter( 'script_loader_tag', 'fasoon_theme_script_loader_tag' );
function fasoon_theme_script_loader_tag( $tag ) {
    $tag = str_replace( '<script ', '<script defer ', $tag );
    return $tag;
}

add_action('wp_head', 'fasoon_theme_fake_jquery', 0);
function fasoon_theme_fake_jquery() {
    echo <<<SCRIPT
<script>
    var jQuery = function () {
        this.ready = function(func) {
            var listener = function() {
                func(jQuery);
            };
            this.addListener(document, 'DOMContentLoaded', listener);
        };
        
        this.onload = function(func) {
            this.addListener(window, 'load', func);      
        };
        
        this.addListener = function (obj, eventName, listener) {
            if (obj.addEventListener) {
                obj.addEventListener(eventName, listener, false);
            } else if (obj.attachEvent) {
                obj.attachEvent('on' + eventName, listener);
            }
        };
        
        return this;
    };
</script>
SCRIPT;
}

// styles optimization

if ( ! defined( 'COMPRESS_CSS' ) ) {
    define( 'COMPRESS_CSS', false );
}

/**
 * Method replace related paths for resources inside css
 * @param string $srcPath Relative path of source file (e.g.: css/modules)
 * @param string $dstPath Relative path of destination file (e.g.: css)
 * @param string $content Source file content
 * @return string
 * @throws Exception
 */
function fasoon_theme_prepareCssResourcePaths($srcPath, $dstPath, $content)
{
    $srcPath = trim($srcPath, DIRECTORY_SEPARATOR);
    $dstPath = trim($dstPath, DIRECTORY_SEPARATOR);
    if ($srcPath == $dstPath || parse_url($srcPath, PHP_URL_HOST) || parse_url($dstPath, PHP_URL_HOST)) {
        return $content;
    }
    $newRelativePath = fasoon_theme_getRelativePath($dstPath, $srcPath);
    $content = preg_replace_callback(
        '#url\(\s*(([\'"])?([^\s\)]+)?\1?)\s*\)#',
        function ($match) use ($newRelativePath) {
            $quote = $match[2];
            $path = $match[1];

            if (0 === strpos($path, 'data:')) {
                return $match[0];
            }

            if ($quote) {
                $path = trim($path, $quote);
            }

            if (false !== strpos($path, '://') || '/' === $path[0]) {
                return $match[0];
            }
            while (0 === strpos($path, '../') && $newRelativePath && $newRelativePath != '.') {
                $newRelativePath = dirname($newRelativePath);
                $path = substr($path, 3);
            }
            if ($newRelativePath && $newRelativePath != '.') {
                $path = $newRelativePath . '/' . $path;
            }
            return "url({$quote}{$path}{$quote})";
        },
        $content
    );
    return $content;
}

function fasoon_theme_getRelativePath($srcPath, $dstPath)
{
    $srcPath = $srcPath ? explode(DIRECTORY_SEPARATOR, trim($srcPath, DIRECTORY_SEPARATOR)) : [];
    $dstPath = $dstPath ? explode(DIRECTORY_SEPARATOR, trim($dstPath, DIRECTORY_SEPARATOR)) : [];
    while ($srcPath && $dstPath && $srcPath[0] == $dstPath[0]) {
        array_shift($srcPath);
        array_shift($dstPath);
    }
    $relativePath = trim(str_repeat('/..', count($srcPath)), DIRECTORY_SEPARATOR);
    if ($dstPath) {
        $relativePath .= ($relativePath ? '/' : '') . implode('/', $dstPath);
    }
    return $relativePath;
}

add_action( 'wp_print_styles', 'fasoon_theme_wp_print_styles', PHP_INT_MAX );
function fasoon_theme_wp_print_styles() {
    $delim = "\n\n";

    $wp_styles = wp_styles();

    $styles = clone $wp_styles;
    $styles->all_deps($styles->queue);

    $indexes = [];
    foreach ( $styles->to_do as $handle ) {
        $index = fasoon_theme_register_handle( $handle, 'stylesheet' );

        if ( false === $index ) {
            return; // something went wrong!!!
        }

        $indexes[$handle] = $index;
    }

    asort( $indexes, SORT_NUMERIC );
    $after = [];
    foreach (array_keys( $indexes ) as $handle ) {
        // exclude stylesheets with extra 'rtl', 'before' and 'after'
        /** @var _WP_Dependency $handle_obj */
        $handle_obj = $styles->registered[$handle];
        if ( ! empty( $handle_obj->extra['rtl'] ) || ! empty( $handle_obj->extra['before'] ) ) {
            unset( $indexes[$handle] );


        }

        if ( ! empty( $handle_obj->extra['after'] ) ) {
            $after = array_merge($after, (array) $handle_obj->extra['after']);
        }

        // remove external stylesheets
        $url_info = parse_url( $handle_obj->src );
        if ( ! empty( $url_info['host'] ) && $url_info['host'] !== $_SERVER['HTTP_HOST'] ) {
            unset( $indexes[$handle] );
        }
    }
    $packed_file_name = join( '-', $indexes ) . '.css';
    $packed_file_path = FASOON_THEME_PACKER_DIR . '/' . $packed_file_name;
    $packed_file_url = FASOON_THEME_PACKER_DIR_URL . '/' . $packed_file_name;

    if ( ! is_file( $packed_file_path ) ) {
        if ( ! $packed = fopen( $packed_file_path, 'w+' ) ) {
            return;
        }

        $www_path = rtrim( get_home_path(), '/' );

        foreach (array_keys( $indexes ) as $handle ) {
            /** @var _WP_Dependency $handle_obj */
            $handle_obj = $styles->registered[$handle];

            if ( $handle_obj->src ) {
                if ( 0 === strpos( $handle_obj->src, '/wp-includes' ) ) {
                    $content = file_get_contents( $www_path . $handle_obj->src );
                } else {

                    $src = $handle_obj->src;
                    $site_url = site_url();
                    $site_url = substr( $site_url, strpos( $site_url, '://' ) + 3 );
                    if ( 0 === strpos( $src, 'http' ) ) {
                        $src = substr( $src, strpos( $src, '://' ) + 3 );
                        $src = str_replace( $site_url, '', $src );
                    } elseif ( 0 === strpos( $src, '//' ) ) {
                        $src = substr( $src, 2 );
                        $src = str_replace( $site_url, '', $src );
                    }

                    if ( false === strpos( $src, '.min.css' ) ) {
                        $minifier = new Minify\CSS( $www_path . $src );
                        $content = $minifier->minify();
                    } else {
                        $content = file_get_contents( $www_path . $src );
                    }

                    $content = fasoon_theme_prepareCssResourcePaths(
                        dirname($src),
                        str_replace( $www_path, '', FASOON_THEME_PACKER_DIR ),
                        $content
                    );
                }

                $content .= $delim;
                fwrite( $packed, $content );

                $wp_styles->dequeue( $handle );
            }
        }

        fclose( $packed );
    }

    foreach (array_keys( $indexes ) as $handle ) {
        $wp_styles->dequeue( $handle );
    }
    // enqueue merged script
    wp_enqueue_style( 'fasoon_merged_style', $packed_file_url );
    $wp_styles->registered['fasoon_merged_style']->extra['after'] = $after;
}

if ( ! function_exists( 'et_divi_fonts_url' ) ) {
    function et_divi_fonts_url() {
        return ''; // disable load google fonts from CDN
    }
}

// html compressor

function fasoon_theme_remove_comments( $html ) {
    $scripts_pattern = '/\<script[^\>]*\>([\s\S]*)\<\/script\>/miUs';
    $comments_pattern = '/(?:(?:\/\*(?:[^*]|(?:\*+[^*\/]))*\*+\/)|(?:(?<!\:|\\\|\')\/\/.*))/';

    $matches = [];
    preg_match_all($scripts_pattern, $html, $matches);
    if ( ! empty( $matches[1] ) ) {
        foreach ( $matches[1] as $script ) {
            if ( $script ) {
                $script_without_comments = preg_replace( $comments_pattern, '', $script );
                $html = str_replace( $script, $script_without_comments, $html );
            }
        }
    }
    return $html;
}

function fasoon_theme_html_compressor_callback( $html ) {
    if ( '' != $html ) {
        $html = fasoon_theme_remove_comments( $html );
        $html = \Qs\Packer\Html::compressHtml( $html );
    }
    return $html;
}

add_action( 'template_redirect', 'fasoon_theme_html_compressor', 0 );
function fasoon_theme_html_compressor() {
    ob_start( 'fasoon_theme_html_compressor_callback' );
}