<?php

namespace AdScale\Handlers;

use AdScale\Helpers\Helper;

defined( 'ABSPATH' ) || exit; // Exit if accessed directly


class Assets {


    public static function load_assets() {
        self::enqueue_adscale_script();
        self::add_product_vars();
        self::add_order_vars();
    }


    public static function load_admin_assets( $hook_suffix ) {
        self::enqueue_admin_script();
        self::enqueue_admin_style();
        self::enqueue_admin_common_js_vars();
    }


    public static function add_common_vars() {
        $js_vars = [];

        $js_var_name = Helper::getConfigSetting( 'js_variables/cart_ajax_url', '' );
        if ( $js_var_name ) {
            // FIX: Pass raw value. wp_localize_script will handle encoding.
            $js_vars[ $js_var_name ] = admin_url( 'admin-ajax.php' );
        }

        $js_var_name = Helper::getConfigSetting( 'js_variables/cart_ajax_nonce', '' );
        if ( $js_var_name ) {
            // FIX: Pass raw value.
            $js_vars[ $js_var_name ] = wp_create_nonce( 'cart_ajax_nonce' );
        }

        $js_var_name = Helper::getConfigSetting( 'js_variables/proxy_ajax_url', '' );
        if ( $js_var_name ) {
            // FIX: Pass raw value.
            $js_vars[ $js_var_name ] = home_url( '/adscale/Proxy' );
        }
        $js_var_name = Helper::getConfigSetting( 'js_variables/last_order_ajax_url', '' );
        if ( $js_var_name ) {
            // FIX: Pass raw value.
            $js_vars[ $js_var_name ] = home_url( '/adscale/LastOrder' );
        }

        self::enqueue_js_vars( $js_vars );
    }


    public static function enqueue_adscale_script() {

        $adscale_script_url_base = Helper::getConfigSetting( 'adscale_script_url_base', '' );
        $adscale_script_handle   = Helper::getConfigSetting( 'adscale_script_handle', '' );

        if ( ! $adscale_script_url_base || ! $adscale_script_handle ) {
            return;
        }

        $shop_domain = Helper::get_shop_domain();

        if ( ! $shop_domain ) {
            return;
        }

        $adscale_script_url = str_replace( '%SHOP_DOMAIN%', $shop_domain, $adscale_script_url_base );

        wp_enqueue_script( $adscale_script_handle, $adscale_script_url, [], time(), true );
        self::add_script_attr( $adscale_script_handle, 'async' );
        self::add_common_vars();
        self::add_to_cart_script();
    }


    // if add_to_cart via ajax
    public static function add_to_cart_script() {

        $script_handle = Helper::getConfigSetting( 'adscale_script_handle', '' );

        $js_var_name__product_id    = Helper::getConfigSetting( 'js_variables/product_id', '' );
        $js_var_name__product_value = Helper::getConfigSetting( 'js_variables/product_value', '' );

        if ( ! $script_handle ) {
            return;
        }
// Sanitize and escape JavaScript variable names
        $js_var_name__product_id    = esc_js( $js_var_name__product_id );
        $js_var_name__product_value = esc_js( $js_var_name__product_value );

// Construct JavaScript code dynamically with proper escaping and formatting
// Note: esc_js() is used correctly here because the variable name is
// being placed *inside* JavaScript string quotes (window["..."]).
        $js_code = 'window.addEventListener("load", function () {' . PHP_EOL;
        $js_code .= '  jQuery(document.body).on("added_to_cart", function (e, fragments, cart_hash, this_button) {' . PHP_EOL;
        $js_code .= '        console.log("EVENT: added_to_cart");' . PHP_EOL;
        $js_code .= '        var productId = jQuery(this_button).data("product_id") || window["' . $js_var_name__product_id . '"];' . PHP_EOL;
        $js_code .= '        var productValue = jQuery(this_button).data("adscale_product_value") || window["' . $js_var_name__product_value . '"];' . PHP_EOL;
        $js_code .= '        callAdscaleAddToCart(productId, productValue);' . PHP_EOL;
        $js_code .= '    });' . PHP_EOL;
        $js_code .= '       function callAdscaleAddToCart(productId, productValue) {' . PHP_EOL;
        $js_code .= '        console.log("productId:", productId);' . PHP_EOL;
        $js_code .= '        console.log("productValue:", productValue);' . PHP_EOL;
        $js_code .= '        if (!productId) { console.log("No productId !"); return; }' . PHP_EOL;
        $js_code .= '        if (!productValue) { console.log("No productValue !"); return; }' . PHP_EOL;
        $js_code .= '        try {' . PHP_EOL;
        $js_code .= '            if (typeof window.adscaleAddToCart === "function") {' . PHP_EOL;
        $js_code .= '                adscaleAddToCart(productId, productValue);' . PHP_EOL;
        $js_code .= '            } else { console.log("Function adscaleAddToCart not found!"); }' . PHP_EOL;
        $js_code .= '        } catch(e) { console.log("Error in adscaleAddToCart: " + e.message); }' . PHP_EOL;
        $js_code .= '    }' . PHP_EOL;
        $js_code .= '});' . PHP_EOL;

        wp_add_inline_script( $script_handle, $js_code, 'before' );

    }


    public static function add_to_cart_trigger_js( $product_id, $product_value ) {

        $script_handle = Helper::getConfigSetting( 'adscale_script_handle', '' );

        if ( ! $script_handle ) {
            return;
        }

        // Define JavaScript as a concatenated string to avoid HEREDOC issues
        $js_code = ' window.addEventListener("load", function () {' . PHP_EOL;
        $js_code .= '        console.log("TRIGGER: added_to_cart");' . PHP_EOL;
        //
        // FIX: Use wp_json_encode() instead of esc_js()
        // This correctly and securely embeds the PHP variable (string, number, etc.)
        // as a JavaScript literal.
        //
        $js_code .= '        callAdscaleAddToCart(' . wp_json_encode( $product_id ) . ', ' . wp_json_encode( $product_value ) . ');' . PHP_EOL;
        $js_code .= '        function callAdscaleAddToCart(productId, productValue) {' . PHP_EOL;
        $js_code .= '               console.log("productId:", productId);' . PHP_EOL;
        $js_code .= '               console.log("productValue:", productValue);' . PHP_EOL;
        $js_code .= '               if (!productId) { console.log("No productId!"); return; }' . PHP_EOL;
        $js_code .= '               if (!productValue) { console.log("No productValue!"); return; }' . PHP_EOL;
        $js_code .= '               try {' . PHP_EOL;
        $js_code .= '                    if (typeof window.adscaleAddToCart === "function") {' . PHP_EOL;
        $js_code .= '                        adscaleAddToCart(productId, productValue);' . PHP_EOL;
        $js_code .= '                    } else { console.log("Function adscaleAddToCart not found!"); }' . PHP_EOL;
        $js_code .= '               } catch(e) { console.log("Error in adscaleAddToCart: " + e.message); }' . PHP_EOL;
        $js_code .= '         }' . PHP_EOL;
        $js_code .= ' });' . PHP_EOL;

        add_action( 'wp_enqueue_scripts', function () use ( $script_handle, $js_code ) {
            wp_add_inline_script( $script_handle, $js_code, 'after' );
        }, 780 );

    }


    public static function add_product_vars() {

        if ( ! Helper::is_product_page() ) {
            return;
        }

        $js_var_name__product_id       = Helper::getConfigSetting( 'js_variables/product_id', '' );
        $js_var_name__product_value    = Helper::getConfigSetting( 'js_variables/product_value', '' );
        $js_var_name__product_currency = Helper::getConfigSetting( 'js_variables/product_currency', '' );

        if ( ! $js_var_name__product_id || ! $js_var_name__product_value || ! $js_var_name__product_currency ) {
            return;
        }

        // FIX: Pass raw values to enqueue_js_vars.
        // Let wp_localize_script handle the "escaping late."
        self::enqueue_js_vars( [
            $js_var_name__product_id       => Helper::get_product_id(),
            $js_var_name__product_value    => Helper::get_product_value(),
            $js_var_name__product_currency => Helper::get_currency(),
        ] );

    }


    public static function add_order_vars() {
        $js_var_name__order_id       = Helper::getConfigSetting( 'js_variables/order_id', '' );
        $js_var_name__order_value    = Helper::getConfigSetting( 'js_variables/order_value', '' );
        $js_var_name__order_currency = Helper::getConfigSetting( 'js_variables/order_currency', '' );

        $js_var_name__order_value_no_shipping = Helper::getConfigSetting( 'js_variables/order_value_no_shipping', '' );

        if (
            ! $js_var_name__order_id ||
            ! $js_var_name__order_value ||
            ! $js_var_name__order_value_no_shipping ||
            ! $js_var_name__order_currency
        ) {
            return;
        }

        $is_order_received_endpoint = Helper::is_order_received_endpoint();
        $is_order_received_page     = Helper::is_order_received_page();

        if ( ! $is_order_received_endpoint && ! $is_order_received_page ) {
            return;
        }

        $order = null;

        if ( $is_order_received_endpoint ) {
            $order = Helper::get_order();
        } elseif ( $is_order_received_page ) {
            $order = Helper::get_order_by_get_params();
        }

        $order_id                = is_object( $order ) ? $order->get_id() : null;
        $order_value             = Helper::get_order_value( $order_id );
        $order_value_no_shipping = Helper::get_order_value_no_shipping( $order_id );
        $order_currency          = is_object( $order ) ? $order->get_currency() : null;

        // FIX: Pass raw values to enqueue_js_vars.
        // Let wp_localize_script handle the "escaping late."
        self::enqueue_js_vars( [
            $js_var_name__order_id                => $order_id,
            $js_var_name__order_value             => $order_value,
            $js_var_name__order_value_no_shipping => $order_value_no_shipping,
            $js_var_name__order_currency          => $order_currency,
        ] );
    }


    /**
     * Add attributes to script tag such as 'async', 'defer'
     * Script must be registered or enqueued before
     *
     * @param $handle_to_process
     * @param $attr
     */
    public static function add_script_attr( $handle_to_process, $attr ) {
        add_filter( 'script_loader_tag', function ( $tag, $handle, $src ) use ( $handle_to_process, $attr ) {
            $attr = esc_attr( $attr );

            if ( $handle_to_process === $handle ) {
                return str_replace( ' src', " {$attr} src", $tag );
            }

            return $tag;
        }, 10, 3 );
    }


    /**
     * Enqueue js vars before AdScale script
     *
     * @param array $js_vars
     * @param bool $as_window_prop
     */
    public static function enqueue_js_vars( array $js_vars, $as_window_prop = true ) {
        $script_handle = Helper::getConfigSetting( 'adscale_script_handle', '' );
        if ( ! $script_handle || empty( $js_vars ) ) {
            return;
        }

        $js_code = '';


        foreach ( $js_vars as $var_name => $var_value ) {
            $var_name = (string) $var_name;
            if ( '' === $var_name ) {
                continue;
            }

            if ( $as_window_prop ) {
                $js_code .= 'window[' . wp_json_encode( $var_name ) . '] = ' . wp_json_encode( $var_value ) . ';' . PHP_EOL;
            } else {
                $js_code .= 'const ' . preg_replace( '/[^A-Za-z0-9_$]/', '_', $var_name ) . ' = ' . wp_json_encode( $var_value ) . ';' . PHP_EOL;
            }
        }

        if ( '' !== $js_code ) {
            wp_add_inline_script( $script_handle, $js_code, 'before' );
        }
    }


    public static function enqueue_admin_script() {
        wp_enqueue_script(
            'adscale_admin',
            ADSCALE_PLUGIN_URL . 'assets/js/admin.js',
            [ 'jquery' ],
            ADSCALE_INTERNAL_MODULE_VERSION,
            true
        );
    }


    public static function enqueue_admin_style() {
        wp_enqueue_style(
            'adscale_admin_css',
            ADSCALE_PLUGIN_URL . 'assets/css/admin.css',
            [],
            ADSCALE_INTERNAL_MODULE_VERSION
        );
    }


    public static function enqueue_admin_common_js_vars() {
        $js_vars = [
            'ajaxUrl'   => esc_url( admin_url( 'admin-ajax.php' ) ),
            'ajaxNonce' => wp_create_nonce( 'adscale_nonce_key' ),
        ];

        wp_localize_script( 'adscale_admin', 'adscaleJsVars', $js_vars );
    }
}