<?php
/**
 * Plugin Name: ACS AI Citation Readiness
 * Plugin URI:  https://acs-developer.com/acs-ai-visibility/
 * Description: Get your site cited by AI search. LLMO diagnosis, llms.txt auto-generation, FAQ schema markup, and AI citation monitoring.
 * Version:     1.1.4
 * Author:      ACS Developer (Locany)
 * Author URI:  https://acs-developer.com/
 * License:     GPLv2 or later
 * License URI: https://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain: acs-ai-citation-readiness
 * Domain Path: /languages
 * Requires at least: 6.0
 * Requires PHP: 7.4
 */

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

define( 'ACSAIV_VERSION', '1.1.4' );
define( 'ACSAIV_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );
define( 'ACSAIV_PLUGIN_URL', plugin_dir_url( __FILE__ ) );

require_once ACSAIV_PLUGIN_DIR . 'includes/class-acsaiv-analyzer.php';
require_once ACSAIV_PLUGIN_DIR . 'includes/class-acsaiv-llms-txt.php';
require_once ACSAIV_PLUGIN_DIR . 'includes/class-acsaiv-faq.php';
require_once ACSAIV_PLUGIN_DIR . 'includes/class-acsaiv-monitor.php';
require_once ACSAIV_PLUGIN_DIR . 'includes/class-acsaiv-monitor-admin.php';

/**
 * プラグイン本体。
 */
class ACSAIV_Plugin {

	/** @var ACSAIV_Llms_Txt */
	public $llms_txt;

	public function __construct() {
		add_action( 'init', array( $this, 'load_textdomain' ) );

		$this->llms_txt = new ACSAIV_Llms_Txt();
		$this->llms_txt->init();

		$faq = new ACSAIV_Faq();
		$faq->init();

		add_action( 'template_redirect', array( 'ACSAIV_Monitor', 'track' ), 1 );

		add_action( 'admin_menu', array( $this, 'add_admin_menu' ) );
		add_action( 'admin_init', array( $this, 'register_settings' ) );
		add_action( 'admin_init', array( $this, 'maybe_dismiss_review_notice' ) );
		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_admin_assets' ) );
	}

	/**
	 * 同梱の翻訳ファイル（languages/）を読み込む。
	 */
	public function load_textdomain() {
		load_plugin_textdomain(
			'acs-ai-citation-readiness',
			false,
			dirname( plugin_basename( __FILE__ ) ) . '/languages'
		);
	}

	/**
	 * 管理画面用CSSを自プラグインの画面だけに読み込む。
	 *
	 * @param string $hook_suffix Current admin page hook.
	 */
	public function enqueue_admin_assets( $hook_suffix ) {
		if ( 'toplevel_page_acs-ai-citation-readiness' !== $hook_suffix ) {
			return;
		}

		wp_enqueue_style(
			'acsaiv-admin',
			ACSAIV_PLUGIN_URL . 'assets/admin.css',
			array(),
			ACSAIV_VERSION
		);
	}

	public function add_admin_menu() {
		add_menu_page(
			__( 'ACS AI Citation Readiness', 'acs-ai-citation-readiness' ),
			__( 'AI Citation Readiness', 'acs-ai-citation-readiness' ),
			'manage_options',
			'acs-ai-citation-readiness',
			array( $this, 'render_admin_page' ),
			'dashicons-visibility',
			81
		);
	}

	/** レビュー依頼を閉じたことを保存する option 名。 */
	const REVIEW_DISMISSED_OPTION = 'acsaiv_review_notice_dismissed';

	/** レビュー依頼の表示開始基準時刻を保存する option 名。 */
	const REVIEW_SINCE_OPTION = 'acsaiv_review_notice_since';

	/** 表示開始までの待機日数。 */
	const REVIEW_DELAY_DAYS = 7;

	/**
	 * 「閉じる」リンクを処理する。一度閉じたら二度と表示しない。
	 *
	 * @return void
	 */
	public function maybe_dismiss_review_notice() {
		if ( ! isset( $_GET['acsaiv_dismiss_review'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- 直後に check_admin_referer で検証する。
			return;
		}
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}

		check_admin_referer( 'acsaiv_dismiss_review' );

		update_option( self::REVIEW_DISMISSED_OPTION, 1, false );

		wp_safe_redirect( admin_url( 'admin.php?page=acs-ai-citation-readiness' ) );
		exit;
	}

	/**
	 * WordPress.org のレビュー依頼を1行だけ描画する。
	 *
	 * 表示条件は「このプラグインの管理画面」「manage_options」「まだ閉じていない」
	 * 「初回表示から7日以上経過」の4つ。外部への送信は一切行わない。
	 *
	 * @return void
	 */
	private function render_review_request() {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}
		if ( get_option( self::REVIEW_DISMISSED_OPTION ) ) {
			return;
		}

		$since = (int) get_option( self::REVIEW_SINCE_OPTION, 0 );
		if ( ! $since ) {
			$since = time();
			update_option( self::REVIEW_SINCE_OPTION, $since, false );
		}
		if ( ( time() - $since ) < self::REVIEW_DELAY_DAYS * DAY_IN_SECONDS ) {
			return;
		}

		$review_url  = 'https://wordpress.org/support/plugin/acs-ai-citation-readiness/reviews/#new-post';
		$dismiss_url = wp_nonce_url(
			add_query_arg(
				array(
					'page'                  => 'acs-ai-citation-readiness',
					'acsaiv_dismiss_review' => '1',
				),
				admin_url( 'admin.php' )
			),
			'acsaiv_dismiss_review'
		);
		?>
		<div class="notice notice-info" style="margin:16px 0;">
			<p>
				<?php esc_html_e( 'If this plugin is useful to you, a review on WordPress.org would help a lot.', 'acs-ai-citation-readiness' ); ?>
				<a href="<?php echo esc_url( $review_url ); ?>" target="_blank" rel="noopener"><?php esc_html_e( 'Write a review', 'acs-ai-citation-readiness' ); ?></a>
				<a href="<?php echo esc_url( $dismiss_url ); ?>" style="margin-left:12px;"><?php esc_html_e( 'Dismiss', 'acs-ai-citation-readiness' ); ?></a>
			</p>
		</div>
		<?php
	}

	public function register_settings() {
		register_setting(
			'acsaiv_options_group',
			'acsaiv_options',
			array( 'sanitize_callback' => array( $this, 'sanitize_options' ) )
		);
	}

	public function sanitize_options( $input ) {
		$output = array();
		$output['llms_txt_enabled'] = ! empty( $input['llms_txt_enabled'] ) ? 1 : 0;
		$output['site_description'] = isset( $input['site_description'] ) ? sanitize_textarea_field( $input['site_description'] ) : '';
		$output['llms_post_count']  = isset( $input['llms_post_count'] ) ? max( 1, min( 50, (int) $input['llms_post_count'] ) ) : 10;

		// llms.txt のリライトルールを反映。
		flush_rewrite_rules();

		return $output;
	}

	/**
	 * 管理画面タブの一覧。拡張プラグインは `acsaiv_admin_tabs` フィルタでタブを追加し、
	 * `acsaiv_render_tab` アクションで本文を描画できる。
	 */
	private function get_tabs() {
		$tabs = array(
			'diagnosis' => __( 'Site Diagnosis', 'acs-ai-citation-readiness' ),
			'llms'      => 'llms.txt',
			'monitor'   => __( 'AI Citation Monitoring', 'acs-ai-citation-readiness' ),
			'usage'     => __( 'How to Use', 'acs-ai-citation-readiness' ),
		);
		return apply_filters( 'acsaiv_admin_tabs', $tabs );
	}

	public function render_admin_page() {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}

		$tabs       = $this->get_tabs();
		$active_tab = isset( $_GET['tab'] ) ? sanitize_key( $_GET['tab'] ) : 'diagnosis'; // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- 表示切替のみ。
		if ( ! isset( $tabs[ $active_tab ] ) ) {
			$active_tab = 'diagnosis';
		}
		?>
		<div class="wrap">
			<h1><?php esc_html_e( 'ACS AI Citation Readiness', 'acs-ai-citation-readiness' ); ?></h1>
			<?php $this->render_review_request(); ?>
			<h2 class="nav-tab-wrapper">
				<?php foreach ( $tabs as $tab_key => $tab_label ) : ?>
					<a href="<?php echo esc_url( add_query_arg( array( 'page' => 'acs-ai-citation-readiness', 'tab' => $tab_key ), admin_url( 'admin.php' ) ) ); ?>" class="nav-tab <?php echo $tab_key === $active_tab ? 'nav-tab-active' : ''; ?>"><?php echo esc_html( $tab_label ); ?></a>
				<?php endforeach; ?>
			</h2>
			<?php
			if ( 'llms' === $active_tab ) {
				$this->render_llms_tab();
			} elseif ( 'monitor' === $active_tab ) {
				ACSAIV_Monitor_Admin::render_tab();
			} elseif ( 'usage' === $active_tab ) {
				$this->render_usage_tab();
			} elseif ( 'diagnosis' === $active_tab ) {
				$this->render_diagnosis_tab();
			} else {
				do_action( 'acsaiv_render_tab', $active_tab );
			}
			?>
		</div>
		<?php
	}

	private function render_diagnosis_tab() {
		$result = null;
		if ( isset( $_POST['acsaiv_run_diagnosis'] ) && check_admin_referer( 'acsaiv_diagnosis' ) ) {
			$analyzer = new ACSAIV_Analyzer();
			$result   = $analyzer->analyze( home_url( '/' ) );
			if ( ! is_wp_error( $result ) ) {
				/** 診断完了。拡張プラグインはここで履歴保存などを行える。 */
				do_action( 'acsaiv_scan_completed', $result, 'manual' );
			}
		}
		?>
		<p><?php esc_html_e( 'Check how ready this site is to be cited by AI search.', 'acs-ai-citation-readiness' ); ?></p>
		<form method="post">
			<?php wp_nonce_field( 'acsaiv_diagnosis' ); ?>
			<p><button type="submit" name="acsaiv_run_diagnosis" value="1" class="button button-primary button-hero"><?php esc_html_e( 'Run Diagnosis Now', 'acs-ai-citation-readiness' ); ?></button></p>
		</form>
		<?php
		if ( null === $result ) {
			return;
		}
		if ( is_wp_error( $result ) ) {
			printf( '<div class="notice notice-error"><p>%s</p></div>', esc_html( $result->get_error_message() ) );
			return;
		}

		$labels = array(
			'A' => __( 'AI Access Foundation', 'acs-ai-citation-readiness' ),
			'B' => __( 'Structure and Citability', 'acs-ai-citation-readiness' ),
			'C' => __( 'Trust Signals (E-E-A-T)', 'acs-ai-citation-readiness' ),
		);
		?>
		<hr />
		<h2>
		<?php
		/* translators: 1: score, 2: maximum score, 3: rank letter (A-D). */
		printf( esc_html__( 'Score: %1$d / %2$d (Rank %3$s)', 'acs-ai-citation-readiness' ), (int) $result['score'], (int) $result['max'], esc_html( $result['rank'] ) );
		?>
		</h2>
		<table class="widefat striped" style="max-width:900px;">
			<thead>
				<tr>
					<th><?php esc_html_e( 'Result', 'acs-ai-citation-readiness' ); ?></th>
					<th><?php esc_html_e( 'Check', 'acs-ai-citation-readiness' ); ?></th>
					<th><?php esc_html_e( 'Points', 'acs-ai-citation-readiness' ); ?></th>
					<th><?php esc_html_e( 'Advice', 'acs-ai-citation-readiness' ); ?></th>
				</tr>
			</thead>
			<tbody>
				<?php foreach ( $result['checks'] as $check ) : ?>
					<tr>
						<td><?php echo $check['passed'] ? '✅' : '❌'; ?></td>
						<td><strong><?php echo esc_html( $check['label'] ); ?></strong><br /><small><?php echo esc_html( $labels[ $check['category'] ] ); ?></small></td>
						<td><?php echo (int) $check['weight']; ?></td>
						<td><?php echo esc_html( $check['advice'] ); ?></td>
					</tr>
				<?php endforeach; ?>
			</tbody>
		</table>
		<?php
	}

	private function render_llms_tab() {
		$options = get_option( 'acsaiv_options', array() );
		?>
		<form method="post" action="options.php">
			<?php settings_fields( 'acsaiv_options_group' ); ?>
			<table class="form-table">
				<tr>
					<th scope="row"><?php esc_html_e( 'Serve llms.txt', 'acs-ai-citation-readiness' ); ?></th>
					<td>
						<label>
							<input type="checkbox" name="acsaiv_options[llms_txt_enabled]" value="1" <?php checked( ! empty( $options['llms_txt_enabled'] ) ); ?> />
							<?php
							/* translators: %s: llms.txt URL of this site. */
							printf( esc_html__( 'Enable serving at %s', 'acs-ai-citation-readiness' ), esc_html( home_url( '/llms.txt' ) ) );
							?>
						</label>
					</td>
				</tr>
				<tr>
					<th scope="row"><?php esc_html_e( 'Site description', 'acs-ai-citation-readiness' ); ?></th>
					<td>
						<textarea name="acsaiv_options[site_description]" rows="3" class="large-text" placeholder="<?php echo esc_attr( get_bloginfo( 'description' ) ); ?>"><?php echo esc_textarea( isset( $options['site_description'] ) ? $options['site_description'] : '' ); ?></textarea>
						<p class="description"><?php esc_html_e( 'A one-line description of your site for AI. If left empty, the site tagline is used.', 'acs-ai-citation-readiness' ); ?></p>
					</td>
				</tr>
				<tr>
					<th scope="row"><?php esc_html_e( 'Number of recent posts to list', 'acs-ai-citation-readiness' ); ?></th>
					<td><input type="number" name="acsaiv_options[llms_post_count]" min="1" max="50" value="<?php echo esc_attr( isset( $options['llms_post_count'] ) ? $options['llms_post_count'] : 10 ); ?>" /></td>
				</tr>
			</table>
			<?php submit_button(); ?>
		</form>
		<h2><?php esc_html_e( 'Preview', 'acs-ai-citation-readiness' ); ?></h2>
		<textarea readonly rows="16" class="large-text code"><?php echo esc_textarea( $this->llms_txt->generate() ); ?></textarea>
		<?php
	}

	private function render_usage_tab() {
		?>
		<h2><?php esc_html_e( 'Inserting FAQ Schema', 'acs-ai-citation-readiness' ); ?></h2>
		<p><?php esc_html_e( 'Use the following shortcode in your content to output a visible Q&A together with FAQPage structured data.', 'acs-ai-citation-readiness' ); ?></p>
		<p><code>[acsaiv_faq q="Question text" a="Answer text"]</code></p>
		<p><?php esc_html_e( 'Multiple shortcodes on the same page are automatically merged into a single FAQPage schema.', 'acs-ai-citation-readiness' ); ?></p>
		<h2><?php esc_html_e( 'Free Web-based Site Checker', 'acs-ai-citation-readiness' ); ?></h2>
		<p>
			<?php esc_html_e( 'A free web-based checker that can score any URL is available on the ACS Developer site.', 'acs-ai-citation-readiness' ); ?>
			<a href="https://acs-developer.com/" target="_blank" rel="noopener">acs-developer.com</a>
		</p>
		<?php if ( ! has_action( 'acsaiv_render_tab' ) ) : ?>
			<h2><?php esc_html_e( 'Pro Version (Separate Add-on)', 'acs-ai-citation-readiness' ); ?></h2>
			<p>
				<?php esc_html_e( 'Scan history, weekly automated scans with email notification, bulk content checks, detailed AI citation monitoring, and AI citation alerts are available in the separate ACS AI Citation Readiness Pro add-on.', 'acs-ai-citation-readiness' ); ?>
				<a href="https://acs-developer.com/acs-ai-visibility/" target="_blank" rel="noopener"><?php esc_html_e( 'Learn more', 'acs-ai-citation-readiness' ); ?></a>
			</p>
		<?php endif; ?>
		<?php
	}
}

new ACSAIV_Plugin();

register_activation_hook(
	__FILE__,
	function () {
		$llms = new ACSAIV_Llms_Txt();
		$llms->add_rewrite();
		flush_rewrite_rules();

		if ( ! get_option( ACSAIV_Monitor::OPT_INSTALLED ) ) {
			update_option( ACSAIV_Monitor::OPT_INSTALLED, current_time( 'Y-m-d' ), false );
		}
	}
);

register_deactivation_hook(
	__FILE__,
	function () {
		flush_rewrite_rules();
	}
);