<?php
/**
 * Admin Menu Handler
 *
 * Manages the admin menu and settings pages for Acumenpopup.
 *
 * @since      1.0.0
 * @package    Acumenpopup
 * @subpackage Acumenpopup/includes/Dashboard
 */

namespace Acumenpopup\Dashboard;

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Class Admin_Menu
 *
 * Manages admin menu registration and settings page rendering (Singleton).
 *
 * @since   1.0.0
 * @package Acumenpopup
 */
class Admin_Menu {

	/**
	 * The single instance of the class.
	 *
	 * @since  1.0.0
	 * @access private
	 * @var    Admin_Menu|null
	 */
	private static $instance = null;

	/**
	 * Menu slug for the main menu.
	 *
	 * @since  1.0.0
	 * @access private
	 * @var    string
	 */
	private $menu_slug = 'acumen-popup';

	/**
	 * Private constructor to prevent direct instantiation.
	 *
	 * @since  1.0.0
	 * @access private
	 */
	private function __construct() {
		$this->init_hooks();
	}

	/**
	 * Get the single instance of the Admin_Menu class.
	 *
	 * @since  1.0.0
	 * @access public
	 *
	 * @return Admin_Menu The single instance.
	 */
	public static function get_instance() {
		if ( is_null( self::$instance ) ) {
			self::$instance = new self();
		}

		return self::$instance;
	}

	/**
	 * Initialize WordPress hooks.
	 *
	 * @since  1.0.0
	 * @access private
	 *
	 * @return void
	 */
	private function init_hooks() {
		add_action( 'admin_menu', array( $this, 'register_menu' ) );
		add_action( 'admin_init', array( $this, 'register_settings' ) );
		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_admin_assets' ) );
		add_action( 'wp_ajax_acumenpopup_get_settings', array( $this, 'get_settings' ) );
		add_action( 'wp_ajax_acumenpopup_save_settings', array( $this, 'save_settings' ) );
	}

	/**
	 * Register the admin menu and submenus.
	 *
	 * @since  1.0.0
	 * @access public
	 *
	 * @return void
	 */
	public function register_menu() {
		// Main menu page.
		add_menu_page(
			esc_html__( 'Acumen Popup', 'acumen-popup' ),
			esc_html__( 'Acumen Popup', 'acumen-popup' ),
			'manage_options',
			$this->menu_slug,
			array( $this, 'render_settings_page' ),
			'dashicons-buddicons-pm',
			100
		);

		// Dashboard submenu (same as main menu).
		add_submenu_page(
			$this->menu_slug,
			esc_html__( 'Campaigns', 'acumen-popup' ),
			esc_html__( 'Campaigns', 'acumen-popup' ),
			'manage_options',
			$this->menu_slug,
			array( $this, 'render_settings_page' )
		);

		// Campaigns submenu

		// Subscribers submenu.
		add_submenu_page(
			$this->menu_slug,
			esc_html__( 'Subscribers', 'acumen-popup' ),
			esc_html__( 'Subscribers', 'acumen-popup' ),
			'manage_options',
			$this->menu_slug . '-subscribers',
			array( $this, 'render_settings_page' )
		);

		// Analytics submenu.
		add_submenu_page(
			$this->menu_slug,
			esc_html__( 'Analytics', 'acumen-popup' ),
			esc_html__( 'Analytics', 'acumen-popup' ),
			'manage_options',
			$this->menu_slug . '-analytics',
			array( $this, 'render_settings_page' )
		);

		// Templates submenu.
		add_submenu_page(
			$this->menu_slug,
			esc_html__( 'Templates', 'acumen-popup' ),
			esc_html__( 'Templates', 'acumen-popup' ),
			'manage_options',
			$this->menu_slug . '-templates',
			array( $this, 'render_settings_page' )
		);

		// A/B Testing submenu.
		add_submenu_page(
			$this->menu_slug,
			esc_html__( 'A/B Testing', 'acumen-popup' ),
			esc_html__( 'A/B Testing', 'acumen-popup' ),
			'manage_options',
			$this->menu_slug . '-ab-testing',
			array( $this, 'render_settings_page' )
		);

		// Settings submenu.
		add_submenu_page(
			$this->menu_slug,
			esc_html__( 'Settings', 'acumen-popup' ),
			esc_html__( 'Settings', 'acumen-popup' ),
			'manage_options',
			$this->menu_slug . '-settings',
			array( $this, 'render_settings_page' )
		);
	}

	/**
	 * Register plugin settings.
	 *
	 * @since  1.0.0
	 * @access public
	 *
	 * @return void
	 */
	public function register_settings() {
		// Register settings group.
		register_setting(
			'acumenpopup_settings_group',
			'acumenpopup_settings',
			array(
				'type'              => 'array',
				'sanitize_callback' => array( $this, 'sanitize_settings' ),
				'default'           => array(),
			)
		);
	}

	/**
	 * Enqueue admin assets for the dashboard.
	 *
	 * @since  1.0.0
	 * @access public
	 *
	 * @param string $hook The current admin page hook.
	 * @return void
	 */
	public function enqueue_admin_assets( $hook ) {
		if ( strpos( $hook, $this->menu_slug ) === false ) {
			return;
		}

		$asset_file = ACUMENPOPUP_PLUGIN_DIR . 'build/dashboard/index.asset.php';

		if ( ! file_exists( $asset_file ) ) {
			return;
		}

		$dependencies = require $asset_file;

		wp_enqueue_script(
			'acumenpopup-dashboard',
			ACUMENPOPUP_URL_FILE . 'build/dashboard/index.js',
			$dependencies['dependencies'],
			$dependencies['version'],
			true
		);

		wp_enqueue_style(
			'acumenpopup-dashboard',
			ACUMENPOPUP_URL_FILE . 'build/dashboard/index.css',
			array(),
			$dependencies['version']
		);

		wp_localize_script(
			'acumenpopup-dashboard',
			'acumenpopupDashboard',
			array(
				'ajax_url'  => admin_url( 'admin-ajax.php' ),
				'admin_url' => admin_url(),
				'nonce'     => wp_create_nonce( 'acumenpopup-nonce' ),
				'api_url'   => esc_url_raw( rest_url( 'acumenpopup/v1' ) ),
			)
		);
	}

	/**
	 * Sanitize settings before saving.
	 *
	 * @since  1.0.0
	 * @access public
	 *
	 * @param array $input Raw settings input.
	 *
	 * @return array Sanitized settings.
	 */
	public function sanitize_settings( $input ) {
		$sanitized = array();

		if ( ! is_array( $input ) ) {
			return $sanitized;
		}

		$boolean_settings = array( 'unfiltered_upload', 'download_remote_image', 'user_consent', 'delete_on_uninstall', 'disable_animations', 'load_fonts_locally', 'remove_dashboard_css' );

		// Add sanitization for each setting as needed.
		foreach ( $input as $key => $value ) {
			$clean_key = sanitize_key( $key );
			if ( in_array( $clean_key, $boolean_settings, true ) ) {
				$sanitized[ $clean_key ] = rest_sanitize_boolean( $value );
			} else {
				$sanitized[ $clean_key ] = sanitize_text_field( $value );
			}
		}

		return $sanitized;
	}

	/**
	 * Render the settings page.
	 *
	 * @since  1.0.0
	 * @access public
	 *
	 * @return void
	 */
	public function render_settings_page() {
		// Check user capability.
		if ( ! current_user_can( 'manage_options' ) ) {
			wp_die( esc_html__( 'You do not have sufficient permissions to access this page.', 'acumen-popup' ) );
		}
		?>
		<div id="acumen-popup-dashboard">
			<div class="acumen-popup-dashboard-loading">
				<p><?php esc_html_e( 'Loading dashboard...', 'acumen-popup' ); ?></p>
			</div>
		</div>
		<?php
	}

	/**
	 * Get the menu slug.
	 *
	 * @since  1.0.0
	 * @access public
	 *
	 * @return string The menu slug.
	 */
	public function get_settings() {
		check_ajax_referer( 'acumenpopup-nonce', 'nonce' );
		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error( array( 'message' => 'Unauthorized' ), 403 );
		}
		$defaults = array(
			'unfiltered_upload'     => false,
			'download_remote_image' => true,
			'user_consent'          => true,
			'delete_on_uninstall'   => false,
			'disable_animations'    => false,
			'load_fonts_locally'    => false,
			'remove_dashboard_css'  => false,
		);
		$saved = get_option( 'acumenpopup_settings', array() );
		if ( is_array( $saved ) ) {
			foreach ( $saved as $k => $v ) {
				$saved[ $k ] = rest_sanitize_boolean( $v );
			}
		}
		wp_send_json_success( wp_parse_args( $saved, $defaults ) );
	}

	public function save_settings() {
		check_ajax_referer( 'acumenpopup-nonce', 'nonce' );
		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error( array( 'message' => 'Unauthorized' ), 403 );
		}
		// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
		$raw   = isset( $_POST['settings'] ) ? wp_unslash( $_POST['settings'] ) : '{}';
		$input = json_decode( $raw, true );
		if ( ! is_array( $input ) ) {
			wp_send_json_error( array( 'message' => 'Invalid data' ) );
		}
		$allowed = array( 'unfiltered_upload', 'download_remote_image', 'user_consent', 'delete_on_uninstall', 'disable_animations', 'load_fonts_locally', 'remove_dashboard_css' );
		$clean   = array();
		foreach ( $allowed as $key ) {
			$clean[ $key ] = ! empty( $input[ $key ] );
		}
		update_option( 'acumenpopup_settings', $clean );
		wp_send_json_success( $clean );
	}

	public function get_menu_slug() {
		return $this->menu_slug;
	}

	/**
	 * Prevent cloning of the instance.
	 *
	 * @since  1.0.0
	 * @access public
	 *
	 * @return void
	 */
	public function __clone() {
		_doing_it_wrong(
			__FUNCTION__,
			esc_html__( 'Cloning is forbidden.', 'acumen-popup' ),
			'1.0.0'
		);
	}

	/**
	 * Prevent unserializing of the instance.
	 *
	 * @since  1.0.0
	 * @access public
	 *
	 * @return void
	 */
	public function __wakeup() {
		_doing_it_wrong(
			__FUNCTION__,
			esc_html__( 'Unserializing is forbidden.', 'acumen-popup' ),
			'1.0.0'
		);
	}
}