<?php
/**
 * Admin chrome for the redesigned ("Mitternacht · Kalenderfarben") plugin UI:
 *   - adds a body class so the theme CSS applies only on Adventura screens
 *   - renders the plugin's own branded navigation bar above every page
 *   - loads the display/body webfonts (Archivo + Hanken Grotesk) on those screens
 *
 * All WordPress mechanics (CPT editor, options.php, admin-post handlers) stay
 * intact — this only restyles and adds navigation on top.
 */

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

class ADVK_Admin_UI {

	public function hooks() {
		add_filter( 'admin_body_class', array( $this, 'body_class' ) );
		add_action( 'in_admin_header', array( $this, 'render_nav' ) );
		add_action( 'admin_enqueue_scripts', array( $this, 'fonts' ), 20 );
	}

	/** Whether the current admin screen belongs to Adventura. */
	private function is_screen() {
		if ( ! function_exists( 'get_current_screen' ) ) {
			return false;
		}
		$screen = get_current_screen();
		if ( ! $screen ) {
			return false;
		}
		// Match ONLY Adventura's own pages — not other "advk-*" plugins such as the
		// License Server ("advk-ls"), which must keep the default WP admin chrome.
		// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- read-only screen detection.
		$page    = isset( $_GET['page'] ) ? sanitize_key( wp_unslash( $_GET['page'] ) ) : '';
		$screens = class_exists( 'ADVK_Dashboard' ) ? ADVK_Dashboard::screens() : array();
		if ( in_array( $page, $screens, true ) ) {
			return true;
		}
		$post_type = ( class_exists( 'ADVK_Doors_CPT' ) ) ? ADVK_Doors_CPT::POST_TYPE : 'advk_door';
		if ( isset( $screen->post_type ) && $post_type === $screen->post_type ) {
			return true;
		}
		return false;
	}

	public function body_class( $classes ) {
		if ( $this->is_screen() ) {
			$classes .= ' advk-admin-screen';
		}
		return $classes;
	}

	public function fonts( $hook ) {
		if ( ! $this->is_screen() ) {
			return;
		}
		// Admin-only webfonts for the redesigned chrome. Loaded here (not on the
		// public frontend, which bundles its fonts locally for DSGVO compliance).
		wp_enqueue_style(
			'advk-admin-fonts',
			'https://fonts.googleapis.com/css2?family=Archivo:wght@600;700;800;900&family=Hanken+Grotesk:wght@400;500;600;700;800&display=swap',
			array(),
			null // versionless external stylesheet
		);
	}

	/** The plugin's own navigation items: [ key, label, url, count ]. */
	private function nav_items() {
		$doors   = number_format_i18n( ADVK_Data::door_count() );
		$entries = class_exists( 'ADVK_Entries' ) ? number_format_i18n( ADVK_Entries::count() ) : '';
		$items = array(
			array( 'dashboard', __( 'Übersicht', 'adventura-interactive-advent-calendar' ), admin_url( 'admin.php?page=advk-dashboard' ), '' ),
			array( 'doors', __( 'Türchen', 'adventura-interactive-advent-calendar' ), admin_url( 'admin.php?page=advk-doors' ), $doors ),
			array( 'entries', __( 'Teilnahmen', 'adventura-interactive-advent-calendar' ), admin_url( 'admin.php?page=advk-entries' ), $entries ),
			array( 'winners', __( 'Auslosung', 'adventura-interactive-advent-calendar' ), admin_url( 'admin.php?page=advk-winners' ), '' ),
			array( 'settings', __( 'Einstellungen', 'adventura-interactive-advent-calendar' ), admin_url( 'admin.php?page=advk-settings' ), '' ),
		);
		if ( defined( 'ADVK_PRO_VERSION' ) ) {
			$items[] = array( 'pro', __( 'Pro', 'adventura-interactive-advent-calendar' ), admin_url( 'admin.php?page=advk-pro' ), '' );
		} else {
			// No Pro add-on installed → point at the upsell page instead.
			$items[] = array( 'pro', '✨ ' . __( 'Pro', 'adventura-interactive-advent-calendar' ), admin_url( 'admin.php?page=advk-pro-upsell' ), '' );
		}
		return $items;
	}

	/** Which nav key matches the current screen. */
	private function current_key() {
		// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- read-only screen detection, no state change.
		$page = isset( $_GET['page'] ) ? sanitize_key( wp_unslash( $_GET['page'] ) ) : '';
		if ( 'advk-dashboard' === $page ) {
			return 'dashboard';
		}
		if ( 'advk-doors' === $page || 'advk-door-edit' === $page ) {
			return 'doors';
		}
		if ( 'advk-entries' === $page ) {
			return 'entries';
		}
		if ( 'advk-winners' === $page ) {
			return 'winners';
		}
		if ( 'advk-settings' === $page ) {
			return 'settings';
		}
		if ( 0 === strpos( $page, 'advk-pro' ) ) {
			return 'pro';
		}
		$screen = function_exists( 'get_current_screen' ) ? get_current_screen() : null;
		$post_type = class_exists( 'ADVK_Doors_CPT' ) ? ADVK_Doors_CPT::POST_TYPE : 'advk_door';
		if ( $screen && isset( $screen->post_type ) && $post_type === $screen->post_type ) {
			return 'doors';
		}
		return '';
	}

	public function render_nav() {
		if ( ! $this->is_screen() || ! current_user_can( 'manage_options' ) ) {
			return;
		}
		$current = $this->current_key();
		$pro     = defined( 'ADVK_PRO_VERSION' );
		$today   = ADVK_Data::today_day();
		$count   = ADVK_Data::door_count();
		?>
		<aside class="advk-side">
			<a class="advk-side-brand" href="<?php echo esc_url( admin_url( 'admin.php?page=advk-dashboard' ) ); ?>">
				<span class="advk-side-badge"><?php echo esc_html( number_format_i18n( $count ) ); ?></span>
				<span class="advk-side-brandtxt">
					<span class="advk-side-title">Adventura</span>
					<span class="advk-side-ver">v<?php echo esc_html( ADVK_VERSION ); ?><?php echo $pro ? ' · Pro' : ''; ?></span>
				</span>
			</a>
			<nav class="advk-side-nav">
				<?php foreach ( $this->nav_items() as $item ) :
					list( $key, $label, $url, $cnt ) = $item;
					$cls = 'advk-side-link' . ( $key === $current ? ' is-active' : '' );
					?>
					<a class="<?php echo esc_attr( $cls ); ?>" href="<?php echo esc_url( $url ); ?>">
						<span><?php echo esc_html( $label ); ?></span>
						<?php if ( '' !== $cnt ) : ?><span class="advk-side-count"><?php echo esc_html( $cnt ); ?></span><?php endif; ?>
					</a>
				<?php endforeach; ?>
			</nav>
			<div class="advk-side-foot">
				<div class="advk-side-status">
					<span class="advk-side-dot"></span><?php esc_html_e( 'Kalender live', 'adventura-interactive-advent-calendar' ); ?>
				</div>
				<span class="advk-side-note">
					<?php
					echo esc_html( $today
						/* translators: 1: current day, 2: total days. */
						? sprintf( __( 'Tag %1$d von %2$d · Türchen öffnet täglich um 00:00', 'adventura-interactive-advent-calendar' ), $today, $count )
						: __( 'außerhalb des Aktionszeitraums', 'adventura-interactive-advent-calendar' ) );
					?>
				</span>
			</div>
		</aside>
		<?php
	}
}