<?php
namespace BavarianRankEngine\Admin;

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

class AdminMenu {
	public function register(): void {
		add_action( 'admin_menu', array( $this, 'add_menus' ) );
	}

	public function add_menus(): void {
		add_menu_page(
			__( 'Bavarian Rank Engine', 'bavarian-rank-engine' ),
			__( 'Bavarian Rank', 'bavarian-rank-engine' ),
			'manage_options',
			'bavarian-rank',
			array( $this, 'render_dashboard' ),
			'dashicons-chart-area',
			80
		);

		// First submenu replaces the parent menu link
		add_submenu_page(
			'bavarian-rank',
			__( 'Dashboard', 'bavarian-rank-engine' ),
			__( 'Dashboard', 'bavarian-rank-engine' ),
			'manage_options',
			'bavarian-rank',
			array( $this, 'render_dashboard' )
		);

		add_submenu_page(
			'bavarian-rank',
			__( 'AI Provider', 'bavarian-rank-engine' ),
			__( 'AI Provider', 'bavarian-rank-engine' ),
			'manage_options',
			'bre-provider',
			array( new ProviderPage(), 'render' )
		);

		add_submenu_page(
			'bavarian-rank',
			__( 'Meta Generator', 'bavarian-rank-engine' ),
			__( 'Meta Generator', 'bavarian-rank-engine' ),
			'manage_options',
			'bre-meta',
			array( new MetaPage(), 'render' )
		);

		add_submenu_page(
			'bavarian-rank',
			'llms.txt',
			'llms.txt',
			'manage_options',
			'bre-llms',
			array( new LlmsPage(), 'render' )
		);

		add_submenu_page(
			'bavarian-rank',
			__( 'Bulk Generator', 'bavarian-rank-engine' ),
			__( 'Bulk Generator', 'bavarian-rank-engine' ),
			'manage_options',
			'bre-bulk',
			array( new BulkPage(), 'render' )
		);

		add_submenu_page(
			'bavarian-rank',
			__( 'robots.txt / AI Bots', 'bavarian-rank-engine' ),
			__( 'robots.txt', 'bavarian-rank-engine' ),
			'manage_options',
			'bre-robots',
			array( new RobotsPage(), 'render' )
		);
	}

	public function render_dashboard(): void {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}

		$settings   = SettingsPage::getSettings();
		$provider   = $settings['provider'] ?? 'openai';
		$post_types = $settings['meta_post_types'] ?? array( 'post', 'page' );
		$meta_stats = $this->get_meta_stats( $post_types );

		include BRE_DIR . 'includes/Admin/views/dashboard.php';
	}

	private function get_meta_stats( array $post_types ): array {
		global $wpdb;
		$stats = array();
		foreach ( $post_types as $pt ) {
			$total        = (int) $wpdb->get_var( // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
				$wpdb->prepare(
					"SELECT COUNT(*) FROM {$wpdb->posts} WHERE post_type = %s AND post_status = 'publish'",
					$pt
				)
			);
			$with_meta    = (int) $wpdb->get_var( // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
				$wpdb->prepare(
					"SELECT COUNT(DISTINCT p.ID) FROM {$wpdb->posts} p
                     INNER JOIN {$wpdb->postmeta} pm ON pm.post_id = p.ID
                     WHERE p.post_type = %s AND p.post_status = 'publish'
                     AND pm.meta_key = %s AND pm.meta_value != ''",
					$pt,
					'_bre_meta_description'
				)
			);
			$stats[ $pt ] = array(
				'total'     => $total,
				'with_meta' => $with_meta,
				'pct'       => $total > 0 ? round( ( $with_meta / $total ) * 100 ) : 0,
			);
		}
		return $stats;
	}
}