<?php
/**
 * PrintBlob › Print queue while PrintBlob Pro is not active: the shop's processing orders with designs, each designed
 * side with its preview, and the print files made for them (orders placed before PrintBlob 1.4.0), each one downloadable
 * as on the order screen. Making print files from the saved designs, one ZIP per order and marking items printed are
 * PrintBlob Pro's, shown as its controls.
 *
 * @package PrintBlob
 */

namespace PrintBlob;

defined( 'ABSPATH' ) || exit;

final class Print_Queue {

	public const PAGE = 'printblob-print-queue';

	/** At most this many orders are listed, oldest first: the next to print is on top. */
	private const LIMIT = 50;

	public static function url(): string {
		return admin_url( 'admin.php?page=' . self::PAGE );
	}

	/**
	 * Processing orders with designs, oldest first (the first `$listed` of them, loaded), the print files they have and
	 * the designs that have none yet, counted over every such order without loading them.
	 *
	 * @param int $listed How many orders to load and list.
	 * @return array{orders:array<int, array{order:\WC_Order, designs:array, files:int, sides:int}>, files:int, unprinted:int, total:int}
	 */
	public static function waiting( int $listed = self::LIMIT ): array {
		$ids     = array_reverse( Design_Store::orders_where( array( 'status' => array( 'wc-processing' ) ) ) );
		$designs = Design_Store::designs_in_orders( $ids );
		$missing = array();
		foreach ( $designs as $design ) {
			$missing[ $design->ID ] = Design_Store::missing_print_files( $design->ID );
		}
		$files  = static fn( array $listed ): int => array_sum( array_map( static fn( array $design ): int => count( $design['sides'] ) - ( $missing[ $design['design'] ] ?? 0 ), $listed ) );
		$orders = array();
		foreach ( array_slice( $ids, 0, $listed ) as $id ) {
			$order = wc_get_order( $id );
			if ( ! $order instanceof \WC_Order ) {
				continue;
			}
			$listed   = Design_Store::order_designs( $order, $designs );
			$orders[] = array(
				'order'   => $order,
				'designs' => $listed,
				'files'   => $files( $listed ),
				'sides'   => array_sum( array_map( static fn( array $design ): int => count( $design['sides'] ), $listed ) ),
			);
		}
		return array(
			'orders'    => $orders,
			'files'     => $files(
				array_map(
					static fn( \WP_Post $design ): array => array(
						'design' => $design->ID,
						'sides'  => Design_Store::sides( $design->ID ),
					),
					array_values( $designs )
				)
			),
			'unprinted' => count( array_filter( $missing ) ),
			'total'     => count( $ids ),
		);
	}

	/**
	 * What is waiting to print, and, while Pro is not active, what Pro does with it.
	 *
	 * @param int  $files  Print files waiting.
	 * @param int  $orders Orders they are in.
	 * @param bool $pro    Whether to say what PrintBlob Pro does with them.
	 */
	public static function summary( int $files, int $orders, bool $pro = true ): string {
		if ( 0 === $orders ) {
			return __( 'No processing order has a design waiting to print.', 'printblob' );
		}
		if ( 0 === $files ) {
			/* translators: %d: number of orders. */
			return sprintf( _n( 'You have %d order with designs waiting to print.', 'You have %d orders with designs waiting to print.', $orders, 'printblob' ), $orders );
		}
		/* translators: %d: number of print files. */
		$files = sprintf( _n( '%d print file', '%d print files', $files, 'printblob' ), $files );
		/* translators: %d: number of orders. */
		$orders = sprintf( _n( '%d order', '%d orders', $orders, 'printblob' ), $orders );
		/* translators: 1: number of print files, as "12 print files", 2: number of orders, as "5 orders". */
		$pitch = __( 'You have %1$s in %2$s waiting: with PrintBlob Pro, one ZIP per order.', 'printblob' );
		/* translators: 1: number of print files, as "12 print files", 2: number of orders, as "5 orders". */
		$plain = __( 'You have %1$s in %2$s waiting to print.', 'printblob' );
		return sprintf( $pro ? $pitch : $plain, $files, $orders );
	}

	/**
	 * How many waiting designs have no print file yet, and PrintBlob Pro's control that makes them; nothing when all have one.
	 *
	 * @param int $unprinted Designs without a print file.
	 */
	public static function unprinted( int $unprinted ): void {
		if ( $unprinted < 1 ) {
			return;
		}
		/* translators: %d: number of designs. */
		$text = sprintf( _n( '%d design has no print file yet: PrintBlob Pro makes it from the saved design.', '%d designs have no print file yet: PrintBlob Pro makes them from the saved designs.', $unprinted, 'printblob' ), $unprinted );
		?>
		<p class="printblob-queue-unprinted"><?php echo esc_html( $text ); ?> <?php Pro::lock( 'queue-print', __( 'Make print files', 'printblob' ) ); ?></p>
		<?php
	}

	/**
	 * The designs without a print file as unprinted() prints them.
	 *
	 * @param int $unprinted Designs without a print file.
	 */
	public static function unprinted_html( int $unprinted ): string {
		ob_start();
		self::unprinted( $unprinted );
		return (string) ob_get_clean();
	}

	public static function render(): void {
		Admin_Menu::allow();
		Admin_Menu::allow( 'edit_shop_orders' );
		$waiting = self::waiting();
		?>
		<div class="wrap printblob-admin">
			<h1><?php esc_html_e( 'Print queue', 'printblob' ); ?></h1>
			<p class="printblob-lead"><?php echo esc_html( self::summary( $waiting['files'], $waiting['total'] ) ); ?></p>
			<?php self::unprinted( $waiting['unprinted'] ); ?>
			<?php foreach ( $waiting['orders'] as $entry ) : ?>
				<?php $order = $entry['order']; ?>
				<div class="printblob-queue-order">
					<h2>
						<a href="<?php echo esc_url( $order->get_edit_order_url() ); ?>">
							<?php
							/* translators: %s: order number. */
							echo esc_html( sprintf( __( 'Order #%s', 'printblob' ), $order->get_order_number() ) );
							?>
						</a>
						<span class="printblob-queue-order__date"><?php echo esc_html( $order->get_date_created() ? wc_format_datetime( $order->get_date_created() ) : '' ); ?></span>
					</h2>
					<ul>
						<?php foreach ( $entry['designs'] as $item_id => $design ) : ?>
							<?php $item = $order->get_item( $item_id ); ?>
							<li>
								<strong><?php echo esc_html( $item ? $item->get_name() : '' ); ?></strong>
								<div class="printblob-order-design" data-testid="printblob-order-design">
									<?php foreach ( $design['sides'] as $side => $data ) : ?>
										<figure class="printblob-order-design__side" data-testid="<?php echo esc_attr( 'printblob-order-side-' . $side ); ?>">
											<?php echo wp_get_attachment_image( (int) ( $data['preview_id'] ?? 0 ), array( 80, 80 ), false, array( 'class' => Order::PREVIEW_CLASS ) ); ?>
											<figcaption>
												<span class="printblob-queue-order__side"><?php echo esc_html( Product_Settings::side_label( (string) $side ) ); ?></span>
												<?php if ( Design_Store::has_print_file( (int) $design['design'], (string) $side ) ) : ?>
													<a data-testid="<?php echo esc_attr( 'printblob-order-print-' . $side ); ?>" href="<?php echo esc_url( Design_Store::print_download_url( (int) $design['design'], (string) $side, (int) $item_id ) ); ?>">
														<?php
														/* translators: %s: printed side, e.g. Front. */
														echo esc_html( sprintf( __( 'Download %s print file', 'printblob' ), Product_Settings::side_label( (string) $side ) ) );
														?>
													</a>
												<?php endif; ?>
											</figcaption>
										</figure>
									<?php endforeach; ?>
								</div>
							</li>
						<?php endforeach; ?>
					</ul>
					<p class="printblob-queue-order__pro">
						<?php
						/* translators: %d: number of print files. */
						Pro::lock( 'queue-zip', sprintf( _n( 'Download its %d print file as one ZIP', 'Download all %d print files of this order as one ZIP', $entry['sides'], 'printblob' ), $entry['sides'] ) );
						Pro::lock( 'queue-zip', __( 'Mark printed', 'printblob' ) );
						?>
						<span class="description"><?php esc_html_e( 'PrintBlob Pro add-on', 'printblob' ); ?></span>
					</p>
				</div>
			<?php endforeach; ?>
			<?php if ( $waiting['total'] > count( $waiting['orders'] ) ) : ?>
				<p>
					<?php
					/* translators: %d: number of orders not listed. */
					echo esc_html( sprintf( _n( '%d more order is waiting.', '%d more orders are waiting.', $waiting['total'] - count( $waiting['orders'] ), 'printblob' ), $waiting['total'] - count( $waiting['orders'] ) ) );
					?>
				</p>
			<?php endif; ?>
		</div>
		<?php
	}
}