<?php
if (!defined('ABSPATH')) exit;

class AdPageX_Admin
{
    public function __construct()
    {
        add_action('admin_menu', [$this, 'register_admin_menu']);
        add_action('admin_init', [$this, 'register_settings']);
    }

    /**
     * Registers the AdPageX admin menu and submenus.
     *
     */
    public function register_admin_menu()
    {
        // Use a custom icon with 20px size for the menu
        add_menu_page(
            'AdPageX',              // Page title
            'AdPageX',              // Menu title
            'manage_options',       // Capability
            'adpagex',              // Slug
            [$this, 'render_placements_page'], // Callback for main menu
            ADPAGEX_URL . 'assets/image/logo_adpagex.png', // Icon URL
            56                      // Position (optional)
        );

        add_action('admin_enqueue_scripts', function () {
            wp_add_inline_style(
                'wp-admin',
                '#toplevel_page_adpagex .wp-menu-image img { height: 20px !important; }'
            );
        });

        add_submenu_page(
            'adpagex',              // Parent slug
            'Placements',           // Page title
            'Placements',           // Menu title
            'manage_options',       // Capability
            'adpagex',              // Same as parent (acts as default)
            [$this, 'render_placements_page'] // Callback
        );

        add_submenu_page(
            'adpagex',              // Parent slug
            'Settings',             // Page title
            'Settings',             // Menu title
            'manage_options',       // Capability
            'adpagex-settings',     // Slug
            [new AdPageX_Settings(), 'render_settings_page'] // Callback for settings page
        );

        add_submenu_page(
            null, // Not showing in menu
            'Edit Placement', 
            'Edit Placement', 
            'manage_options', 
            'adpagex-edit', 
            [new AdPageX_Settings(), 'display_form_page']
        );
    }

    /**
     * Registers plugin settings for AdPageX configurations.
     *
     */
    public function register_settings()
    {
        register_setting('adpagex_group', 'adpagex_configurations', [
            'type' => 'array',
            'sanitize_callback' => [$this, 'sanitize_configurations'],
            'default' => [],
        ]);
        register_setting('adpagex_group', 'adpagex_active_config', [
            'type' => 'string',
            'sanitize_callback' => 'sanitize_text_field',
            'default' => '',
        ]);
    }

    /**
     * Sanitizes the configurations array before saving.
     *
     * @param mixed $configs
     * @return array
     */
    public function sanitize_configurations($configs)
    {
        if (!is_array($configs)) {
            return [];
        }
        foreach ($configs as $key => $cfg) {
            if (is_array($cfg)) {
                foreach ($cfg as $k => $v) {
                    $configs[$key][$k] = is_array($v)
                        ? array_map('sanitize_text_field', $v)
                        : sanitize_text_field($v);
                }
            }
        }
        return $configs;
    }

    /**
     * Renders the Ad Placements management page.
     *
     */
    public function render_placements_page()
    {
        $configs = get_option('adpagex_configurations', []);
        if (!is_array($configs)) {
            $configs = [];
        }
        $active = get_option('adpagex_active_config');

        // Process form submission for new/update placement
        if (isset($_POST['action_type'])) {
            $has_error = false;

            // Handle delete
            if ($_POST['action_type'] === 'delete') {
                if (
                    ! isset($_POST['_wpnonce'], $_POST['config_id']) ||
                    ! wp_verify_nonce(
                        sanitize_text_field(wp_unslash($_POST['_wpnonce'])), // Đã sửa
                        'adpagex_delete_placement_' . sanitize_text_field(wp_unslash($_POST['config_id']))
                    )
                ) {
                    wp_die( esc_html__( 'Security check failed', 'adpagex' ) );
                }
                if ( ! current_user_can('manage_options') ) {
                    wp_die( esc_html__( 'Insufficient permissions', 'adpagex' ) );
                }
                $config_id = sanitize_text_field(wp_unslash($_POST['config_id']));
                foreach ($configs as $key => $cfg) {
                    if ($cfg['id'] === $config_id) {
                        unset($configs[$key]);
                        break;
                    }
                }
                update_option('adpagex_configurations', $configs);

                // If deleted placement was active, set first placement as active or none
                if ($active === $config_id) {
                    $new_active = !empty($configs) ? $configs[0]['id'] : '';
                    update_option('adpagex_active_config', $new_active);
                    $active = $new_active;
                }

                printf( '<div class="notice notice-success is-dismissible"><p>%s</p></div>', esc_html__( 'Placement deleted successfully!', 'adpagex' ) );
            }

            // Handle set active
            if ($_POST['action_type'] === 'set_active') {
                if (
                    ! isset($_POST['_wpnonce'], $_POST['config_id']) ||
                    ! wp_verify_nonce(
                        sanitize_text_field(wp_unslash($_POST['_wpnonce'])), // Đã sửa
                        'adpagex_set_active_' . sanitize_text_field(wp_unslash($_POST['config_id']))
                    )
                ) {
                    wp_die( esc_html__( 'Security check failed', 'adpagex' ) );
                }
                if ( ! current_user_can('manage_options') ) {
                    wp_die( esc_html__( 'Insufficient permissions', 'adpagex' ) );
                }
                $config_id = sanitize_text_field(wp_unslash($_POST['config_id']));
                $found = false;
                foreach ($configs as $cfg) {
                    if ($cfg['id'] === $config_id) {
                        $found = true;
                        break;
                    }
                }
                if ($found) {
                    update_option('adpagex_active_config', $config_id);
                    $active = $config_id;
                    printf( '<div class="notice notice-success is-dismissible"><p>%s</p></div>', esc_html__( 'Placement set as active!', 'adpagex' ) );
                } else {
                    printf( '<div class="notice notice-error is-dismissible"><p>%s</p></div>', esc_html__( 'Invalid placement selected.', 'adpagex' ) );
                }
            }
        }

        // Get placement for editing if specified
        $edit_config = null;
        if (isset($_GET['edit']) && !empty($_GET['edit'])) {
            $edit_id = sanitize_text_field(wp_unslash($_GET['edit']));
            foreach ($configs as $cfg) {
                if ($cfg['id'] === $edit_id) {
                    $edit_config = $cfg;
                    break;
                }
            }
        }

        $this->enqueue_admin_assets(); // Enqueue styles and scripts
        include ADPAGEX_DIR . 'includes/views/placements-page.php';
    }

    /**
     * Enqueues admin specific styles and scripts.
     */
    private function enqueue_admin_assets()
    {
        wp_enqueue_style('wp-color-picker');
        wp_enqueue_style('adpagex-admin-styles', ADPAGEX_URL . 'assets/css/admin-styles.css', [], ADPAGEX_VERSION);
        wp_enqueue_script('adpagex-admin-scripts', ADPAGEX_URL . 'assets/js/admin-scripts.js', ['jquery', 'wp-color-picker'], ADPAGEX_VERSION, true);
        wp_localize_script('adpagex-admin-scripts', 'adpagexData', [
            'enterCssSelector'  => __('Enter CSS selector', 'adpagex'),
            'remove'            => __('Remove', 'adpagex'),
            'selectorsRequired' => __('Please enter at least one selector for the rewarded ad trigger.', 'adpagex'),
        ]);
    }
}