<?php
namespace WooOrderCart;

use WooOrderCart\Modules\Support\ModuleToggles;

class Assets {

    private static $_instance = null;
    private $manifest = [];

    /**
     * Singleton-Instanz holen.
     *
     * @return Assets
     */
    public static function instance() {
        if (is_null(self::$_instance)) {
            self::$_instance = new self();
        }
        return self::$_instance;
    }

    /**
     * Konstruktor.
     */
    private function __construct() {

      
        // Frontend Assets
        //add_action('wp_enqueue_scripts', [$this, 'enqueue_frontend_assets']);
         // Frontend conditional Assets
         add_action('wp_enqueue_scripts', [$this, 'conditionally_enqueue_frontend_assets']);
    }

    /**
     * Manifest.json laden und cachen.
     */
    private function load_manifest($type) {
        $manifest_path = IPSCMI_ORDER_CART_PATH . '/dist/' . $type . '/manifest.json';
        $manifest_version = defined( 'IPSCMI_ORDER_CART_VERSION' ) ? IPSCMI_ORDER_CART_VERSION : 'dev';
        $manifest_mtime = file_exists( $manifest_path ) ? (int) filemtime( $manifest_path ) : 0;
        $cache_key = 'ipscmi_order_cart_manifest_' . md5( $type . '|' . $manifest_version . '|' . $manifest_mtime );

        // Versuche, den Transient-Wert zu laden
        $manifest = get_transient($cache_key);
    
        // Prüfen, ob der Transient-Wert existiert
        if (false === $manifest) {
            if (file_exists($manifest_path)) {
                $manifest_content = file_get_contents($manifest_path);
                
                // JSON-Dekodierung
                $manifest = json_decode($manifest_content, true);
    
                if (json_last_error() === JSON_ERROR_NONE) {
                    // Speichere den Dekodierten Wert im Transient
                    set_transient($cache_key, $manifest, HOUR_IN_SECONDS);

                } else {
                    return;
                }
            } else {
                return;
            }
        }
    
        // Manifest speichern
        $this->manifest = $manifest ?? [];
    }

    /**
     * Asset-URL basierend auf relativen Pfaden aus manifest.json zurückgeben.
     *
     * @param string $src Der relative Pfad des Assets.
     * @return string
     */
    private function get_asset_url($src) {
        return plugins_url($src, IPSCMI_ORDER_CART_FILE);
    }

    /**
     * Frontend-Assets einbinden.
     */
    public function enqueue_frontend_assets() {
        $this->conditionally_enqueue_frontend_assets();
    }

    /**
     * Assets Frontend registrieren.
     */
    public function register_frontend_assets() {
        $this->load_manifest('frontend');

        // Frontend-Assets registrieren
        if (!empty($this->manifest['frontend'])) {
            foreach ($this->manifest['frontend']['scripts'] as $handle => $src) {
                if ($handle === 'ips-bootstrap-js') {
                    wp_register_script('ipscmi-order-cart-bootstrap', $this->get_asset_url($src), [], IPSCMI_ORDER_CART_VERSION, true);
                } else {
                wp_register_script("ipscmi-order-cart-frontend-{$handle}", $this->get_asset_url($src), ['jquery'], IPSCMI_ORDER_CART_VERSION, true);
                }
            }
            foreach ($this->manifest['frontend']['styles'] as $handle => $src) {
                wp_register_style("ipscmi-order-cart-frontend-{$handle}", $this->get_asset_url($src), [], IPSCMI_ORDER_CART_VERSION, 'all');
            }
        }

    }

//############################################################################################################
//============================================================================================================
//############################################################################################################

    /**
     * @return array<string,array{scripts?:array<int,string>,styles?:array<int,string>}>
     */
    private function frontend_asset_groups(): array {
        return [
            'sidecart' => [
                // The React bundle owns the Sidecart UI. Only the shared icon
                // font is needed outside the bundle.
                'scripts' => [],
                'styles'  => [ 'ips-woogeneralall-css' ],
            ],
            'cartgate' => [
                // Cart Gate's React notice reads product facts from the hidden
                // context field; variable-product facts must follow Woo events.
                'scripts' => [ 'ips-cartgate-product-context-js' ],
                'styles'  => [ 'ips-woogeneralall-css' ],
            ],
        ];
    }

    /**
     * @return array<int,string>
     */
    private function active_frontend_asset_groups(): array {
        $toggles = ModuleToggles::instance();
        $groups = [];

        if ( $toggles->is_enabled( 'sidecart' ) ) {
            $groups[] = 'sidecart';
        }

        if ( $toggles->is_enabled( 'cartgate' ) ) {
            $groups[] = 'cartgate';
        }

        return $groups;
    }

    private function enqueue_frontend_asset_group( string $group ): bool {
        $asset_groups = $this->frontend_asset_groups();
        if ( ! isset( $asset_groups[ $group ] ) || ! $this->asset_group_has_assets( $asset_groups[ $group ] ) ) {
            return false;
        }

        $this->enqueue_assets( $asset_groups[ $group ], 'frontend' );

        return true;
    }

    private function asset_group_has_assets( array $assets ): bool {
        return ! empty( $assets['scripts'] ) || ! empty( $assets['styles'] );
    }

    /**
 * Hilfsmethode, um Scripts und Styles zu enqueuen.
 */
private function enqueue_assets($assets, $type) {
    // Scripts
    if (!empty($assets['scripts'])) {
        foreach ($assets['scripts'] as $script) {
            if ( '' === $script ) {
                continue;
            }
            if ($script === 'ips-bootstrap-js') {
                // Spezielle Behandlung: Bootstrap wird über den Handle 'ipscmi-order-cart-bootstrap' enqueued.
                wp_enqueue_script('ipscmi-order-cart-bootstrap');
            } else {
            wp_enqueue_script("ipscmi-order-cart-{$type}-{$script}");
            }
        }
    }

    // Styles
    if (!empty($assets['styles'])) {
        foreach ($assets['styles'] as $style) {
            if ( '' === $style ) {
                continue;
            }
            wp_enqueue_style("ipscmi-order-cart-{$type}-{$style}");
        }
    }
}

        /**
     * Dynamisches Enqueue für Frontend-Assets.
     */
    public function conditionally_enqueue_frontend_assets() {
        if ( ! ModuleToggles::instance()->any_frontend_module_enabled() ) {
            return;
        }

        $asset_groups = $this->active_frontend_asset_groups();
        if ( [] === $asset_groups ) {
            return;
        }

        $this->register_frontend_assets();
        foreach ( $asset_groups as $group ) {
            $this->enqueue_frontend_asset_group( $group );
        }
    }

    /**
     * Generiert benutzerdefiniertes CSS basierend auf den Einstellungen.
     *
     * @return string Generierter CSS-Code.
     */
    public function inline_style(){
        $button_custom_css = $table_custom_css = '';

        // CUSTOM BUTTON STYLE
        if ('custom' === wooordercart_get_option('button_style', 'wooorder_style_settings_tabs', 'default') ){
            $btn_padding        = wooorder_dimensions( 'btn_custom_padding', 'wooorder_style_settings_tabs', 'padding');
            $btn_margin         = wooorder_dimensions( 'button_custom_margin', 'wooorder_style_settings_tabs','margin');
            $btn_border_radius  = wooorder_dimensions('button_custom_border_radius','wooorder_style_settings_tabs', 'border-radius');

            $btn_color          = wooorder_generate_css('button_color', 'wooorder_style_settings_tabs', 'color');
            $btn_bg_color       = wooorder_generate_css('background_color','wooorder_style_settings_tabs', 'background-color');

            // HOVER Button
            $btn_hover_color    = wooorder_generate_css('button_hover_color', 'wooorder_style_settings_tabs', 'color');
            $btn_hover_bg_color = wooorder_generate_css('hover_background_color', 'wooorder_style_settings_tabs','background-color');

            // Generierter CSS-Code für den benutzerdefinierten Button-Stil
            $button_custom_css = "                                                          
                .wooorder-button{
                        {$btn_padding}
                        {$btn_margin}
                        {$btn_color}
                        {$btn_bg_color}
                        {$btn_border_radius}
                }
                .wooorder-button:hover{
                    {$btn_hover_color}
                    {$btn_hover_bg_color}
                }
            ";
        }

        // Wooorder Wishlist Table STYLE
        if( 'custom' === wooordercart_get_option('table_style', 'wooorder_style_settings_tabs', 'default')){
            $header_color            = wooorder_generate_css('table_heading_color','wooorder_style_settings_tabs','color');
            $heading_bg_color        = wooorder_generate_css('table_heading_bg_color', 'wooorder_style_settings_tabs','background-color');
            $heading_border_color    = wooorder_generate_css('table_border_color', 'wooorder_style_settings_tabs', 'border-color');

            $border_color            = wooorder_generate_css('table_border_color','wooorder_style_settings_tabs', 'border-color');

            // BUTTON - ADD TO CART
            $button_color            = wooorder_generate_css('table_cart_button_color', 'wooorder_style_settings_tabs', 'color');
            $button_bg_color         = wooorder_generate_css('table_cart_button_bg_color', 'wooorder_style_settings_tabs', 'background-color');
            $button_hover_color      = wooorder_generate_css('table_cart_button_hover_color', 'wooorder_style_settings_tabs', 'color');
            $button_hover_bg_color   = wooorder_generate_css('table_cart_button_hover_bg_color', 'wooorder_style_settings_tabs', 'background-color');

            // Generierter CSS-Code für den benutzerdefinierten Tabellenstil
            $table_custom_css = "
                .wooorder-table-content table thead > tr{
                    {$heading_border_color}
                }
                .wooorder-table-content table,
                .wooorder-table-content table tbody > tr{
                    {$border_color}
                }
            ";

            if ($button_color || $button_bg_color){
                $table_custom_css .= "
                    .wooorder-table-content table .wooorder-addtocart{
                            {$button_color}
                            {$button_bg_color}
                    }
                ";
            }

            if ($button_hover_color || $button_hover_bg_color){
                $table_custom_css .= "
                    .wooorder-table-content table .wooorder-addtocart:hover{
                        {$button_hover_color}
                        {$button_hover_bg_color}
                    }
                ";
            }
        }

        return $button_custom_css . $table_custom_css;
    }
}