<?php
/*
Plugin Name: ActionButton
Description: Adds a responsive sticky footer button with customizable text, link, gradient background, and font color. The button appears on pages where the shortcode is placed.
Version: 1.0.0
Author: Vedant Knowledge Systems Private Limited
Author URI: https://myvedant.com/wordpress-plugins/action-button/
License: GPLv2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
*/

if (!defined('ABSPATH')) {
    exit;
}

// Admin menu
function actionbutton_add_admin_menu() {
    add_menu_page(
        'ActionButton Settings',
        'ActionButton',
        'manage_options',
        'actionbutton_sticky_buttons',
        'actionbutton_settings_page',
        'dashicons-admin-generic',
        90
    );
}
add_action('admin_menu', 'actionbutton_add_admin_menu');

// Register settings
function actionbutton_register_settings() {
    register_setting('actionbutton_settings_group', 'actionbutton_buttons', 'actionbutton_sanitize_buttons');
}
add_action('admin_init', 'actionbutton_register_settings');

// Sanitize data
function actionbutton_sanitize_buttons($input) {
    if (!is_array($input)) return [];

    foreach ($input as &$button) {
        $button['text'] = isset($button['text']) ? sanitize_text_field(wp_unslash($button['text'])) : '';
        $button['link'] = isset($button['link']) ? esc_url_raw(wp_unslash($button['link'])) : '';
        $button['color1'] = isset($button['color1']) ? sanitize_hex_color(wp_unslash($button['color1'])) : '';
        $button['color2'] = isset($button['color2']) ? sanitize_hex_color(wp_unslash($button['color2'])) : '';
        $button['font_color'] = isset($button['font_color']) ? sanitize_hex_color(wp_unslash($button['font_color'])) : '';
    }

    return $input;
}

// Admin assets
function actionbutton_admin_assets($hook) {
    if ($hook !== 'toplevel_page_actionbutton_sticky_buttons') return;

    wp_enqueue_style('actionbutton-admin-style', plugin_dir_url(__FILE__) . 'assets/actionbutton-frontend.css', [], '1.0.0');

    $js = "
    document.querySelectorAll('.actionbutton-edit-button').forEach(button => {
        button.addEventListener('click', () => {
            document.getElementById('actionbutton-edit-index').value = button.dataset.index;
            document.getElementById('actionbutton-edit-text').value = button.dataset.text;
            document.getElementById('actionbutton-edit-link').value = button.dataset.link;
            document.getElementById('actionbutton-edit-color1').value = button.dataset.color1;
            document.getElementById('actionbutton-edit-color2').value = button.dataset.color2;
            document.getElementById('actionbutton-edit-fontcolor').value = button.dataset.fontcolor;
            document.getElementById('actionbutton-edit-modal').style.display = 'block';
        });
    });
    ";
    wp_add_inline_script('jquery-core', $js);
}
add_action('admin_enqueue_scripts', 'actionbutton_admin_assets');

// Settings page
function actionbutton_settings_page() {
    $buttons = get_option('actionbutton_buttons', []);

    if (!empty($_POST) && !check_admin_referer('actionbutton_buttons_action', 'actionbutton_buttons_nonce')) {
        wp_die('Security check failed');
    }

    if (isset($_POST['actionbutton_add_button'])) {
        if (count($buttons) < 1) {
            $new_button = [
                'text' => isset($_POST['button_text']) ? sanitize_text_field(wp_unslash($_POST['button_text'])) : '',
                'link' => isset($_POST['button_link']) ? esc_url_raw(wp_unslash($_POST['button_link'])) : '',
                'color1' => isset($_POST['button_color1']) ? sanitize_hex_color(wp_unslash($_POST['button_color1'])) : '',
                'color2' => isset($_POST['button_color2']) ? sanitize_hex_color(wp_unslash($_POST['button_color2'])) : '',
                'font_color' => isset($_POST['font_color']) ? sanitize_hex_color(wp_unslash($_POST['font_color'])) : '',
            ];
            update_option('actionbutton_buttons', [$new_button]);
            $buttons = [$new_button];
        }
    }

    if (isset($_POST['actionbutton_delete_button'])) {
        update_option('actionbutton_buttons', []);
        $buttons = [];
    }

    if (isset($_POST['actionbutton_edit_button'])) {
        $index = isset($_POST['button_index']) ? intval($_POST['button_index']) : 0;
        if (isset($buttons[$index])) {
            $buttons[$index] = [
                'text' => isset($_POST['edit_button_text']) ? sanitize_text_field(wp_unslash($_POST['edit_button_text'])) : '',
                'link' => isset($_POST['edit_button_link']) ? esc_url_raw(wp_unslash($_POST['edit_button_link'])) : '',
                'color1' => isset($_POST['edit_button_color1']) ? sanitize_hex_color(wp_unslash($_POST['edit_button_color1'])) : '',
                'color2' => isset($_POST['edit_button_color2']) ? sanitize_hex_color(wp_unslash($_POST['edit_button_color2'])) : '',
                'font_color' => isset($_POST['edit_font_color']) ? sanitize_hex_color(wp_unslash($_POST['edit_font_color'])) : '',
            ];
            update_option('actionbutton_buttons', $buttons);
        }
    }
?>
<div class="wrap">
    <h1>ActionButton Settings</h1>

    <?php if (empty($buttons)) : ?>
        <form method="post">
            <?php wp_nonce_field('actionbutton_buttons_action', 'actionbutton_buttons_nonce'); ?>
            <table class="form-table">
                <tr><th>Button Text</th><td><input type="text" name="button_text" required></td></tr>
                <tr><th>Button Link</th><td><input type="url" name="button_link" required></td></tr>
                <tr><th>Gradient Color 1</th><td><input type="color" name="button_color1" value="#f39c12" required></td></tr>
                <tr><th>Gradient Color 2</th><td><input type="color" name="button_color2" value="#e74c3c" required></td></tr>
                <tr><th>Font Color</th><td><input type="color" name="font_color" value="#ffffff" required></td></tr>
            </table>
            <input type="submit" name="actionbutton_add_button" class="button button-primary" value="Add Button">
        </form>
    <?php else : ?>
        <div class="notice notice-warning"><p>Only one sticky action button is allowed in the free version.</p></div>
    <?php endif; ?>

    <?php if (!empty($buttons)) : ?>
        <h2>Existing Button</h2>
        <table class="widefat">
            <thead><tr><th>Text</th><th>Link</th><th>Shortcode</th><th>Actions</th></tr></thead>
            <tbody>
                <?php foreach ($buttons as $i => $b) : ?>
                    <tr>
                        <td><?php echo esc_html($b['text']); ?></td>
                        <td><?php echo esc_url($b['link']); ?></td>
                        <td>[action_button id="<?php echo esc_html($i); ?>"]</td>
                        <td>
                            <button class="button actionbutton-edit-button"
                                data-index="<?php echo esc_attr($i); ?>"
                                data-text="<?php echo esc_attr($b['text']); ?>"
                                data-link="<?php echo esc_url($b['link']); ?>"
                                data-color1="<?php echo esc_attr($b['color1']); ?>"
                                data-color2="<?php echo esc_attr($b['color2']); ?>"
                                data-fontcolor="<?php echo esc_attr($b['font_color']); ?>">
                                Edit
                            </button>
                            <form method="post" style="display:inline;">
                                <?php wp_nonce_field('actionbutton_buttons_action', 'actionbutton_buttons_nonce'); ?>
                                <input type="submit" name="actionbutton_delete_button" class="button" value="Delete">
                            </form>
                        </td>
                    </tr>
                <?php endforeach; ?>
            </tbody>
        </table>
    <?php endif; ?>
</div>

<div id="actionbutton-edit-modal" style="display:none; position:fixed; top:50%; left:50%; transform:translate(-50%,-50%); background:#fff; padding:20px; z-index:9999;">
    <h2>Edit Button</h2>
    <form method="post">
        <?php wp_nonce_field('actionbutton_buttons_action', 'actionbutton_buttons_nonce'); ?>
        <input type="hidden" name="button_index" id="actionbutton-edit-index">
        <table class="form-table">
            <tr><th>Text</th><td><input type="text" name="edit_button_text" id="actionbutton-edit-text" required></td></tr>
            <tr><th>Link</th><td><input type="url" name="edit_button_link" id="actionbutton-edit-link" required></td></tr>
            <tr><th>Color 1</th><td><input type="color" name="edit_button_color1" id="actionbutton-edit-color1" required></td></tr>
            <tr><th>Color 2</th><td><input type="color" name="edit_button_color2" id="actionbutton-edit-color2" required></td></tr>
            <tr><th>Font Color</th><td><input type="color" name="edit_font_color" id="actionbutton-edit-fontcolor" required></td></tr>
        </table>
        <input type="submit" name="actionbutton_edit_button" class="button button-primary" value="Save">
        <button type="button" class="button" onclick="document.getElementById('actionbutton-edit-modal').style.display='none';">Cancel</button>
    </form>
</div>
<?php
}

// Frontend enqueue
function actionbutton_enqueue_assets() {
    if (!is_admin()) {
        wp_enqueue_style('actionbutton-style', plugin_dir_url(__FILE__) . 'assets/actionbutton-frontend.css', [], '1.0.0');
    }
}
add_action('wp_enqueue_scripts', 'actionbutton_enqueue_assets');

// Shortcode handler
function actionbutton_shortcode($atts) {
    if (!isset($atts['id']) || !is_numeric($atts['id'])) return '';

    $id = intval($atts['id']);
    $buttons = get_option('actionbutton_buttons', []);
    if (!isset($buttons[$id])) return '';

    $b = $buttons[$id];
    ob_start(); ?>
    <a href="<?php echo esc_url($b['link']); ?>" class="actionbutton-fixed" style="color:<?php echo esc_attr($b['font_color']); ?>; background: linear-gradient(45deg, <?php echo esc_attr($b['color1']); ?>, <?php echo esc_attr($b['color2']); ?>);">
        <span class="actionbutton-animated-text"><?php echo esc_html($b['text']); ?></span>
    </a>
    <?php
    return ob_get_clean();
}
add_shortcode('action_button', 'actionbutton_shortcode');