<?php
/**
 * Admin dashboard controller, menu registration, asset enqueuing, and AJAX actions.
 *
 * @package Ahtesham_Web_Vitals_Booster
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

class AWVB_Admin {

	/**
	 * Settings instance.
	 *
	 * @var AWVB_Settings
	 */
	private $settings;

	/**
	 * Rollback instance.
	 *
	 * @var AWVB_Rollback
	 */
	private $rollback;

	/**
	 * Hook suffix for admin page.
	 *
	 * @var string
	 */
	private $hook_suffix = '';

	/**
	 * Constructor.
	 *
	 * @param AWVB_Settings $settings
	 * @param AWVB_Rollback $rollback
	 */
	public function __construct( $settings, $rollback ) {
		$this->settings = $settings;
		$this->rollback = $rollback;
	}

	/**
	 * Register Admin Menus.
	 */
	public function add_admin_menu() {
		$this->hook_suffix = add_menu_page(
			__( 'Ahtesham Web Vitals Booster', 'ahtesham-web-vitals-booster' ),
			__( 'Web Vitals Booster', 'ahtesham-web-vitals-booster' ),
			'manage_options',
			'ahtesham-web-vitals-booster',
			array( $this, 'render_admin_page' ),
			'dashicons-performance',
			59
		);

		add_submenu_page(
			'ahtesham-web-vitals-booster',
			__( 'Dashboard & Overview', 'ahtesham-web-vitals-booster' ),
			__( 'Dashboard', 'ahtesham-web-vitals-booster' ),
			'manage_options',
			'ahtesham-web-vitals-booster',
			array( $this, 'render_admin_page' )
		);

		add_submenu_page(
			'ahtesham-web-vitals-booster',
			__( 'Optimization Settings', 'ahtesham-web-vitals-booster' ),
			__( 'Settings', 'ahtesham-web-vitals-booster' ),
			'manage_options',
			'awvb-settings',
			array( $this, 'render_settings_page' )
		);

		add_submenu_page(
			'ahtesham-web-vitals-booster',
			__( 'Diagnostics & Health', 'ahtesham-web-vitals-booster' ),
			__( 'Diagnostics', 'ahtesham-web-vitals-booster' ),
			'manage_options',
			'awvb-diagnostics',
			array( $this, 'render_diagnostics_page' )
		);
	}

	/**
	 * Enqueue Admin CSS & JS.
	 *
	 * @param string $hook
	 */
	public function enqueue_admin_assets( $hook ) {
		if ( false === strpos( $hook, 'ahtesham-web-vitals-booster' ) && false === strpos( $hook, 'awvb-' ) ) {
			return;
		}

		wp_enqueue_style(
			'awvb-admin-css',
			AWVB_PLUGIN_URL . 'assets/css/admin.css',
			array(),
			AWVB_VERSION
		);

		wp_enqueue_script(
			'awvb-admin-js',
			AWVB_PLUGIN_URL . 'assets/js/admin.js',
			array( 'jquery' ),
			AWVB_VERSION,
			true
		);

		wp_localize_script(
			'awvb-admin-js',
			'awvbAdminData',
			array(
				'ajaxUrl' => admin_url( 'admin-ajax.php' ),
				'nonce'   => wp_create_nonce( 'awvb_admin_nonce' ),
				'strings' => array(
					'saving'      => __( 'Saving...', 'ahtesham-web-vitals-booster' ),
					'saveChanges' => __( 'Save Optimization Settings', 'ahtesham-web-vitals-booster' ),
				),
			)
		);
	}

	/**
	 * Add AWVB quick-action node to the WordPress Admin Bar.
	 *
	 * @param WP_Admin_Bar $wp_admin_bar
	 */
	public function add_admin_bar_node( $wp_admin_bar ) {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}

		$wp_admin_bar->add_node(
			array(
				'id'    => 'awvb-menu',
				'title' => '<span class="ab-icon dashicons dashicons-performance" style="top:2px;"></span> Web Vitals',
				'href'  => admin_url( 'admin.php?page=ahtesham-web-vitals-booster' ),
			)
		);

		$wp_admin_bar->add_node(
			array(
				'id'     => 'awvb-purge-cache',
				'parent' => 'awvb-menu',
				'title'  => __( 'Purge All Caches', 'ahtesham-web-vitals-booster' ),
				'href'   => '#',
			)
		);

		$wp_admin_bar->add_node(
			array(
				'id'     => 'awvb-bar-settings',
				'parent' => 'awvb-menu',
				'title'  => __( 'Settings', 'ahtesham-web-vitals-booster' ),
				'href'   => admin_url( 'admin.php?page=awvb-settings' ),
			)
		);
	}

	/**
	 * Render main Dashboard view.
	 */
	public function render_admin_page() {
		$settings = $this->settings;
		$rollback = $this->rollback;
		include AWVB_PLUGIN_DIR . 'admin/views/dashboard.php';
	}

	/**
	 * Render Settings view.
	 */
	public function render_settings_page() {
		$settings = $this->settings;
		$rollback = $this->rollback;
		include AWVB_PLUGIN_DIR . 'admin/views/settings.php';
	}

	/**
	 * Render Diagnostics view.
	 */
	public function render_diagnostics_page() {
		$diagnostics = AWVB_Diagnostics::run_diagnostics();
		$export_text = AWVB_Diagnostics::generate_export_report();
		include AWVB_PLUGIN_DIR . 'admin/views/diagnostics.php';
	}

	/**
	 * AJAX: Save Settings with automatic backup snapshot.
	 */
	public function ajax_save_settings() {
		check_ajax_referer( 'awvb_admin_nonce', 'nonce' );

		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error( array( 'message' => __( 'Permission denied.', 'ahtesham-web-vitals-booster' ) ) );
		}

		$this->rollback->create_backup( 'Auto snapshot before settings save' );

		$raw_data = isset( $_POST['awvb_settings'] ) ? (array) $_POST['awvb_settings'] : array(); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
		$success  = $this->settings->update( $raw_data );

		$browser_cache = ! empty( $raw_data['browser_caching'] );
		AWVB_Cache::update_htaccess_rules( $browser_cache );

		if ( $success ) {
			wp_send_json_success( array( 'message' => __( 'Optimization settings saved successfully! Snapshot created.', 'ahtesham-web-vitals-booster' ) ) );
		} else {
			wp_send_json_success( array( 'message' => __( 'Settings updated (no changes detected).', 'ahtesham-web-vitals-booster' ) ) );
		}
	}

	/**
	 * AJAX: Apply 1-Click Preset (Safe or Balanced).
	 */
	public function ajax_apply_preset() {
		check_ajax_referer( 'awvb_admin_nonce', 'nonce' );

		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error( array( 'message' => __( 'Permission denied.', 'ahtesham-web-vitals-booster' ) ) );
		}

		$preset = isset( $_POST['preset'] ) ? sanitize_key( $_POST['preset'] ) : 'safe';
		$this->rollback->create_backup( 'Preset applied: ' . ucfirst( $preset ) );

		$new_defaults = AWVB_Settings::get_default_settings( $preset );
		$this->settings->update( $new_defaults );

		wp_send_json_success( array( 'message' => sprintf( __( '%s preset applied successfully!', 'ahtesham-web-vitals-booster' ), ucfirst( $preset ) ) ) );
	}

	/**
	 * AJAX: Restore Backup Snapshot.
	 */
	public function ajax_restore_backup() {
		check_ajax_referer( 'awvb_admin_nonce', 'nonce' );

		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error( array( 'message' => __( 'Permission denied.', 'ahtesham-web-vitals-booster' ) ) );
		}

		$backup_id = isset( $_POST['backup_id'] ) ? sanitize_text_field( wp_unslash( $_POST['backup_id'] ) ) : '';
		$res       = $this->rollback->restore_backup( $backup_id );

		if ( is_wp_error( $res ) ) {
			wp_send_json_error( array( 'message' => $res->get_error_message() ) );
		} else {
			wp_send_json_success( array( 'message' => __( 'Configuration snapshot restored!', 'ahtesham-web-vitals-booster' ) ) );
		}
	}

	/**
	 * AJAX: Clean Expired Transients.
	 */
	public function ajax_clean_transients() {
		check_ajax_referer( 'awvb_admin_nonce', 'nonce' );

		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error( array( 'message' => __( 'Permission denied.', 'ahtesham-web-vitals-booster' ) ) );
		}

		$cleaned = AWVB_Database::clean_expired_transients();
		wp_send_json_success( array( 'message' => sprintf( __( 'Cleaned %d expired transients safely!', 'ahtesham-web-vitals-booster' ), $cleaned ) ) );
	}

	/**
	 * AJAX: Purge All Caches.
	 */
	public function ajax_purge_cache() {
		check_ajax_referer( 'awvb_admin_nonce', 'nonce' );

		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error( array( 'message' => __( 'Permission denied.', 'ahtesham-web-vitals-booster' ) ) );
		}

		AWVB_Cache_Plugins::purge_all_detected_caches();
		delete_transient( 'awvb_diagnostics_cache' );

		wp_send_json_success( array( 'message' => __( 'All site and plugin caches purged successfully!', 'ahtesham-web-vitals-booster' ) ) );
	}
}