/**
 * Plugin Name: Custom WooCommerce Currency Switcher
 * Description: A floating currency switcher for WooCommerce with a pop-up selector.
 * Version: 1.2
 * Author: Your Name
 * License: GPL2
 */

// Enqueue CSS and JavaScript
function custom_currency_switcher_assets() {
    wp_enqueue_style('currency-switcher-css', plugin_dir_url(__FILE__) . 'css/currency-switcher.css');
    wp_enqueue_script('jquery');
    wp_enqueue_script('currency-switcher-js', plugin_dir_url(__FILE__) . 'js/currency-switcher.js', array('jquery'), null, true);

    wp_localize_script('currency-switcher-js', 'currencySwitcherAjax', array(
        'ajax_url' => admin_url('admin-ajax.php'),
    ));
}
add_action('wp_enqueue_scripts', 'custom_currency_switcher_assets');

// Ensure WooCommerce session starts properly
function start_woocommerce_session() {
    if (!session_id()) {
        session_start();
    }
    if (WC()->session) {
        WC()->session->set('currency', WC()->session->get('currency', 'USD'));
    }
}
add_action('init', 'start_woocommerce_session');

// Currency symbols mapping
function get_currency_symbols() {
    return array(
        'USD' => '$',
        'NGN' => '₦',
        'GHS' => '₵',
        'ZAR' => 'R'
    );
}

// Add currency switcher HTML (Removed from checkout page)
// Add currency switcher only on specific pages
function custom_currency_switcher_html() {
    if (is_checkout() || is_shop()) { 
        return; // Don't show on checkout or shop page
    }

    // Check if we're on a single product page and if the product belongs to the "recipe-book" category
    if (is_product()) {
        global $post;
        $product = wc_get_product($post->ID);
        if (!$product || !has_term('recipe-book', 'product_cat', $product->get_id())) {
            return; // Hide switcher if not in the "recipe-book" category
        }
    }

    // Ensure it shows on the cart page
    if (is_cart() || is_product()) {
        $selected_currency = WC()->session->get('currency', 'USD');
        $currencies = array('USD' => 'USD', 'NGN' => 'NGN', 'GHS' => 'GHS', 'ZAR' => 'ZAR');

        echo '<div id="currency-switcher" class="currency-switcher">';
        echo '<div id="currency-label">Currency: <span id="current-currency">' . esc_html($selected_currency) . '</span></div>';
        echo '</div>';

        // Currency Popup
        echo '<div id="currency-popup">';
        echo '<select id="currency-selector">';
        foreach ($currencies as $code => $label) {
            $selected = ($code === $selected_currency) ? 'selected' : '';
            echo "<option value='$code' $selected>$label</option>";
        }
        echo '</select>';
        echo '<button id="currency-close">Close</button>';
        echo '</div>';
    }
}
add_action('wp_footer', 'custom_currency_switcher_html');

// Handle AJAX currency switching
function set_currency() {
    if (!WC()->session) {
        WC()->initialize_session();
    }

    if (isset($_POST['currency'])) {
        $currency = sanitize_text_field($_POST['currency']);
        WC()->session->set('currency', $currency);
        
        // Ensure prices update dynamically via AJAX
        WC()->cart->calculate_totals();
        wp_send_json_success(array('currency' => $currency));
    } else {
        wp_send_json_error(array('message' => 'Invalid request'));
    }
    wp_die();
}
add_action('wp_ajax_set_currency', 'set_currency');
add_action('wp_ajax_nopriv_set_currency', 'set_currency');

// Display correct price and currency symbol
function custom_currency_display_price($price, $product) {
    if (!WC()->session) {
        WC()->initialize_session();
    }

    $selected_currency = WC()->session->get('currency', 'USD');
    $currency_symbols = get_currency_symbols();
    $custom_price = get_post_meta($product->get_id(), '_custom_price_' . strtolower($selected_currency), true);

    if (!empty($custom_price)) {
        $symbol = isset($currency_symbols[$selected_currency]) ? $currency_symbols[$selected_currency] : $selected_currency;
        return $symbol . number_format($custom_price, 2);
    }
    return $price;
}
add_filter('woocommerce_get_price_html', 'custom_currency_display_price', 10, 2);

// Update Cart & Checkout Prices Based on Selected Currency
function update_cart_totals($cart) {
    if (!WC()->session) {
        return;
    }

    $selected_currency = WC()->session->get('currency', 'USD');
    $currency_symbols = get_currency_symbols();

    foreach ($cart->get_cart() as $cart_item) {
        $product = wc_get_product($cart_item['product_id']);
        $custom_price = get_post_meta($product->get_id(), '_custom_price_' . strtolower($selected_currency), true);

        if (!empty($custom_price)) {
            $cart_item['data']->set_price($custom_price);
        }
    }
}
add_action('woocommerce_before_calculate_totals', 'update_cart_totals', 10, 1);

// Ensure Checkout Uses Selected Currency and Symbol
function set_currency_at_checkout($currency) {
    if (WC()->session) {
        return WC()->session->get('currency', 'USD');
    }
    return $currency;
}
add_filter('woocommerce_currency', 'set_currency_at_checkout');

// Add AJAX refresh for cart page when switching currency
function refresh_cart_on_currency_change() {
    wc_add_notice(__('Currency updated successfully.', 'woocommerce'), 'success');
    wp_send_json_success();
}
add_action('wp_ajax_refresh_cart', 'refresh_cart_on_currency_change');
add_action('wp_ajax_nopriv_refresh_cart', 'refresh_cart_on_currency_change');

// Add custom price fields for different currencies in the product edit page
function add_custom_currency_fields() {
    global $post;

    echo '<div class="options_group">';
    
    $currencies = array(
        'USD' => 'US Dollar',
        'NGN' => 'Nigerian Naira',
        'GHS' => 'Ghanaian Cedi',
        'ZAR' => 'South African Rand'
    );

    foreach ($currencies as $currency_code => $currency_label) {
        woocommerce_wp_text_input(array(
            'id' => '_custom_price_' . strtolower($currency_code),
            'label' => __('Price in ' . $currency_label, 'woocommerce'),
            'desc_tip' => 'true',
            'description' => __('Set a fixed price for ' . $currency_label . '.', 'woocommerce'),
            'type' => 'number',
            'custom_attributes' => array(
                'step' => '0.01',
                'min' => '0'
            ),
        ));
    }

    echo '</div>';
}
add_action('woocommerce_product_options_pricing', 'add_custom_currency_fields');

// Save the custom prices
function save_custom_currency_fields($post_id) {
    $currencies = array('USD', 'NGN', 'GHS', 'ZAR');

    foreach ($currencies as $currency) {
        $field_id = '_custom_price_' . strtolower($currency);
        if (isset($_POST[$field_id])) {
            update_post_meta($post_id, $field_id, sanitize_text_field($_POST[$field_id]));
        }
    }
}
add_action('woocommerce_process_product_meta', 'save_custom_currency_fields');

// Handle AJAX request to fetch product price based on selected currency
function get_product_price_by_currency() {
    if (!isset($_POST['product_id']) || !isset($_POST['currency'])) {
        wp_send_json_error(array('message' => 'Invalid request.'));
    }

    // Get the product ID and selected currency
    $product_id = intval($_POST['product_id']);
    $currency = sanitize_text_field($_POST['currency']);

    // Ensure WooCommerce session is initialized
    if (!WC()->session) {
        WC()->initialize_session();
    }

    // Define your currency symbols mapping (you can modify it)
    $currency_symbols = array(
        'USD' => '$',
        'NGN' => '₦',
        'GHS' => '₵',
        'ZAR' => 'R',
    );

    // Get the custom price for the selected currency
    $custom_price = get_post_meta($product_id, '_custom_price_' . strtolower($currency), true);

    // If custom price is not set, use the regular price
    if (empty($custom_price)) {
        $product = wc_get_product($product_id);
        $custom_price = $product->get_price();
    }

    // Get the correct currency symbol
    $currency_symbol = isset($currency_symbols[$currency]) ? $currency_symbols[$currency] : '$';

    // Return the formatted price
    wp_send_json_success(array(
        'price' => $currency_symbol . number_format($custom_price, 2),
    ));
}
add_action('wp_ajax_get_product_price', 'get_product_price_by_currency');
add_action('wp_ajax_nopriv_get_product_price', 'get_product_price_by_currency');<?xml version="1.0" encoding="UTF-8"?>
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