<?php
/**
 * Dismissible marketing banner shown across all wp-admin pages.
 *
 * Content, link, countdown, and show-frequency are all controlled remotely
 * from the AI Schema Gen SaaS dashboard (Admin > Settings > WordPress Plugin
 * Promo Banner) — this class only renders whatever config it fetches.
 *
 * @package Schema_AI
 * @since   1.0.5
 */

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

/**
 * Class Schema_AI_Promo_Banner
 */
class Schema_AI_Promo_Banner {

	/**
	 * User meta key storing the last dismissal for this banner:
	 * array( 'banner_id' => string, 'dismissed_at' => int ).
	 *
	 * @var string
	 */
	const DISMISS_META_KEY = 'schema_ai_dismissed_promo_banner';

	/**
	 * Transient key the fetched remote config is cached under.
	 *
	 * @var string
	 */
	const CACHE_KEY = 'schema_ai_promo_banner_config';

	/**
	 * Remote config fetched once per request.
	 *
	 * @var array|null|false False = not yet loaded.
	 */
	private $config = false;

	/**
	 * Register hooks.
	 */
	public function __construct() {
		add_action( 'admin_notices', array( $this, 'render' ) );
		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_assets' ) );
		add_action( 'wp_ajax_schema_ai_dismiss_promo_banner', array( $this, 'ajax_dismiss' ) );
	}

	/**
	 * Fetch the banner config set in the SaaS dashboard, cached in a
	 * transient so it doesn't add a request to every admin page load.
	 *
	 * @return array|null Null if disabled, unset, or unreachable.
	 */
	private function get_config() {
		if ( false !== $this->config ) {
			return $this->config;
		}

		$cached = get_transient( self::CACHE_KEY );
		if ( false !== $cached ) {
			$this->config = ( is_array( $cached ) && ! empty( $cached ) ) ? $cached : null;
			return $this->config;
		}

		$settings = get_option( 'schema_ai_settings', array() );
		$api_key  = ! empty( $settings['api_key'] ) ? $settings['api_key'] : '';

		if ( empty( $api_key ) ) {
			$this->config = null;
			return null;
		}

		$response = wp_remote_get(
			SCHEMA_AI_API_BASE . '/app/public-settings',
			array(
				'headers' => array( 'X-API-Key' => $api_key ),
				'timeout' => 8,
			)
		);

		if ( is_wp_error( $response ) || 200 !== wp_remote_retrieve_response_code( $response ) ) {
			// Retry sooner on failure than the normal cache lifetime.
			set_transient( self::CACHE_KEY, array(), 5 * MINUTE_IN_SECONDS );
			$this->config = null;
			return null;
		}

		$body   = json_decode( wp_remote_retrieve_body( $response ), true );
		$banner = isset( $body['data']['promo_banner'] ) && is_array( $body['data']['promo_banner'] )
			? $body['data']['promo_banner']
			: array();

		$valid = ! empty( $banner['enabled'] ) && ! empty( $banner['id'] ) && ! empty( $banner['headline'] );

		set_transient( self::CACHE_KEY, $valid ? $banner : array(), HOUR_IN_SECONDS );

		$this->config = $valid ? $banner : null;
		return $this->config;
	}

	/**
	 * Whether the current user should see the current banner, based on the
	 * configured show frequency and this user's last dismissal.
	 *
	 * @param array $config Remote banner config.
	 * @return bool
	 */
	private function should_show( $config ) {
		if ( ! current_user_can( 'manage_options' ) ) {
			return false;
		}

		$dismissed = get_user_meta( get_current_user_id(), self::DISMISS_META_KEY, true );

		if ( empty( $dismissed ) || ! is_array( $dismissed ) || $dismissed['banner_id'] !== $config['id'] ) {
			return true; // Never dismissed, or this is a newly published banner.
		}

		$elapsed  = time() - (int) $dismissed['dismissed_at'];
		$frequency = isset( $config['frequency'] ) ? $config['frequency'] : 'once';

		switch ( $frequency ) {
			case 'daily':
				return $elapsed >= DAY_IN_SECONDS;
			case 'weekly':
				return $elapsed >= WEEK_IN_SECONDS;
			default: // 'once' — a dismissed one-time/special-offer banner stays hidden.
				return false;
		}
	}

	/**
	 * Print the banner markup on admin_notices.
	 */
	public function render() {
		$config = $this->get_config();

		if ( ! $config || ! $this->should_show( $config ) ) {
			return;
		}
		?>
		<div id="schema-ai-promo-banner" class="schema-ai-promo-banner" data-ends-at="<?php echo esc_attr( $config['ends_at'] ); ?>">
			<button type="button" class="schema-ai-promo-banner__dismiss" aria-label="<?php esc_attr_e( 'Dismiss', 'ai-schema-gen' ); ?>">&times;</button>

			<?php if ( ! empty( $config['badge'] ) ) : ?>
				<div class="schema-ai-promo-banner__badge"><?php echo esc_html( $config['badge'] ); ?></div>
			<?php endif; ?>

			<div class="schema-ai-promo-banner__text">
				<div class="schema-ai-promo-banner__headline"><?php echo esc_html( $config['headline'] ); ?></div>
				<?php if ( ! empty( $config['subtext'] ) ) : ?>
					<div class="schema-ai-promo-banner__subtext"><?php echo esc_html( $config['subtext'] ); ?></div>
				<?php endif; ?>
			</div>

			<?php if ( ! empty( $config['ends_at'] ) ) : ?>
				<div class="schema-ai-promo-banner__countdown">
					<div class="schema-ai-promo-banner__countdown-unit">
						<span class="schema-ai-promo-banner__countdown-value" data-unit="days">00</span>
						<span class="schema-ai-promo-banner__countdown-label"><?php esc_html_e( 'Days', 'ai-schema-gen' ); ?></span>
					</div>
					<div class="schema-ai-promo-banner__countdown-unit">
						<span class="schema-ai-promo-banner__countdown-value" data-unit="hours">00</span>
						<span class="schema-ai-promo-banner__countdown-label"><?php esc_html_e( 'Hrs', 'ai-schema-gen' ); ?></span>
					</div>
					<div class="schema-ai-promo-banner__countdown-unit">
						<span class="schema-ai-promo-banner__countdown-value" data-unit="minutes">00</span>
						<span class="schema-ai-promo-banner__countdown-label"><?php esc_html_e( 'Min', 'ai-schema-gen' ); ?></span>
					</div>
					<div class="schema-ai-promo-banner__countdown-unit">
						<span class="schema-ai-promo-banner__countdown-value" data-unit="seconds">00</span>
						<span class="schema-ai-promo-banner__countdown-label"><?php esc_html_e( 'Sec', 'ai-schema-gen' ); ?></span>
					</div>
				</div>
			<?php endif; ?>

			<?php if ( ! empty( $config['cta_url'] ) && ! empty( $config['cta_text'] ) ) : ?>
				<a href="<?php echo esc_url( $config['cta_url'] ); ?>" class="schema-ai-promo-banner__cta" target="_blank" rel="noopener noreferrer">
					<?php echo esc_html( $config['cta_text'] ); ?> &rarr;
				</a>
			<?php endif; ?>
		</div>
		<?php
	}

	/**
	 * Enqueue the banner's CSS/JS only when it will actually be shown.
	 */
	public function enqueue_assets() {
		$config = $this->get_config();

		if ( ! $config || ! $this->should_show( $config ) ) {
			return;
		}

		wp_enqueue_style(
			'ai-schema-gen-promo-banner',
			SCHEMA_AI_PLUGIN_URL . 'admin/assets/css/promo-banner.css',
			array(),
			SCHEMA_AI_VERSION
		);

		wp_enqueue_script(
			'ai-schema-gen-promo-banner',
			SCHEMA_AI_PLUGIN_URL . 'admin/assets/js/promo-banner.js',
			array(),
			SCHEMA_AI_VERSION,
			true
		);

		wp_localize_script(
			'ai-schema-gen-promo-banner',
			'schemaAiPromoBanner',
			array(
				'ajaxUrl'  => admin_url( 'admin-ajax.php' ),
				'nonce'    => wp_create_nonce( 'schema_ai_dismiss_promo_banner' ),
				'bannerId' => $config['id'],
			)
		);
	}

	/**
	 * AJAX handler: remember that the current user dismissed this banner,
	 * and when — so daily/weekly banners know when to reappear.
	 */
	public function ajax_dismiss() {
		check_ajax_referer( 'schema_ai_dismiss_promo_banner' );

		$banner_id = isset( $_POST['banner_id'] ) ? sanitize_text_field( wp_unslash( $_POST['banner_id'] ) ) : '';

		if ( empty( $banner_id ) ) {
			wp_send_json_error();
		}

		update_user_meta(
			get_current_user_id(),
			self::DISMISS_META_KEY,
			array(
				'banner_id'    => $banner_id,
				'dismissed_at' => time(),
			)
		);

		wp_send_json_success();
	}
}