<?php
/**
 * Designed items in the cart and the order.
 *
 * @package Eazign
 */

defined( 'ABSPATH' ) || exit;

/**
 * Adds designed products to the cart with their design, prices surcharges
 * (additional print sides, free size) as quoted by the service and copies
 * everything into the order line item.
 */
class Eazign_Cart {

	/**
	 * Set while our own add-to-cart runs (lets designer products through).
	 *
	 * @var bool
	 */
	private static $adding = false;

	/**
	 * Hooks.
	 */
	public static function init() {
		add_action( 'wc_ajax_eazign_add_to_cart', array( __CLASS__, 'ajax_add' ) );
		add_filter( 'woocommerce_add_to_cart_validation', array( __CLASS__, 'require_design' ), 10, 2 );
		add_action( 'woocommerce_before_calculate_totals', array( __CLASS__, 'apply_prices' ), 20 );
		add_filter( 'woocommerce_get_item_data', array( __CLASS__, 'item_data' ), 10, 2 );
		add_filter( 'woocommerce_cart_item_thumbnail', array( __CLASS__, 'thumbnail' ), 10, 2 );
		add_filter( 'woocommerce_store_api_cart_item_images', array( __CLASS__, 'store_api_images' ), 10, 2 );
		add_action( 'woocommerce_checkout_create_order_line_item', array( __CLASS__, 'order_item' ), 10, 3 );
		add_filter( 'woocommerce_order_item_thumbnail', array( __CLASS__, 'order_thumbnail' ), 10, 2 );
	}

	/**
	 * Add to cart from the editor: { design_id }. Price, product and variation
	 * come from the service's quote, not from the browser.
	 */
	public static function ajax_add() {
		if ( ! check_ajax_referer( 'eazign_cart', 'nonce', false ) ) {
			wp_send_json_error( array( 'message' => __( 'Your session has expired. Please reload the page.', 'eazign' ) ), 403 );
		}
		$design_id = isset( $_POST['design_id'] ) ? sanitize_key( wp_unslash( $_POST['design_id'] ) ) : '';
		$quote     = $design_id ? Eazign_Client::post( 'cart', array( 'designId' => $design_id ) ) : new WP_Error( 'eazign_design', __( 'Design missing.', 'eazign' ) );
		if ( is_wp_error( $quote ) ) {
			wp_send_json_error( array( 'message' => $quote->get_error_message() ) );
		}
		$product   = wc_get_product( (int) $quote['productId'] );
		$variation = wc_get_product( (int) $quote['variationId'] );
		if ( ! Eazign_Frontend::is_designer_product( $product ) || ! $variation || $variation->get_parent_id() !== $product->get_id() ) {
			wp_send_json_error( array( 'message' => __( 'This product cannot be designed.', 'eazign' ) ) );
		}

		self::$adding = true;
		$key          = WC()->cart->add_to_cart(
			$product->get_id(),
			1,
			$variation->get_id(),
			wc_get_product_variation_attributes( $variation->get_id() ),
			array(
				'eazign' => array(
					'design_id' => sanitize_key( $quote['designId'] ),
					'preview'   => esc_url_raw( (string) $quote['previewUrl'] ),
					'sides'     => array_map( 'sanitize_text_field', (array) $quote['sides'] ),
					'size'      => sanitize_text_field( (string) $quote['size'] ),
					'surcharge' => (float) $quote['surcharge'],
					'lines'     => array_map(
						function ( $line ) {
							return array(
								'label'  => sanitize_text_field( $line['label'] ),
								'amount' => (float) $line['amount'],
							);
						},
						(array) $quote['lines']
					),
				),
			)
		);
		self::$adding = false;
		if ( ! $key ) {
			$notices = wc_get_notices( 'error' );
			wc_clear_notices();
			$message = $notices ? wp_strip_all_tags( $notices[0]['notice'] ) : __( 'Could not add the item to the cart.', 'eazign' );
			wp_send_json_error( array( 'message' => $message ) );
		}
		wp_send_json_success( array( 'redirect' => wc_get_cart_url() ) );
	}

	/**
	 * Designer products can only be bought with a design.
	 *
	 * @param bool $valid      Valid so far.
	 * @param int  $product_id Product id.
	 * @return bool
	 */
	public static function require_design( $valid, $product_id ) {
		if ( $valid && ! self::$adding && Eazign_Frontend::is_designer_product( wc_get_product( $product_id ) ) ) {
			wc_add_notice( __( 'Please design your product first: click "Design now".', 'eazign' ), 'error' );
			return false;
		}
		return $valid;
	}

	/**
	 * Variation price plus the quoted surcharges.
	 *
	 * @param WC_Cart $cart Cart.
	 */
	public static function apply_prices( $cart ) {
		if ( is_admin() && ! wp_doing_ajax() ) {
			return;
		}
		foreach ( $cart->get_cart() as $item ) {
			if ( empty( $item['eazign']['surcharge'] ) ) {
				continue;
			}
			// Fresh product: the cart object may already carry a raised price.
			$base = wc_get_product( $item['variation_id'] ? $item['variation_id'] : $item['product_id'] );
			if ( $base ) {
				$item['data']->set_price( (float) $base->get_price( 'edit' ) + (float) $item['eazign']['surcharge'] );
			}
		}
	}

	/**
	 * Design details under the item name (cart, checkout, mini cart, blocks).
	 *
	 * @param array $data Item data.
	 * @param array $item Cart item.
	 * @return array
	 */
	public static function item_data( $data, $item ) {
		if ( empty( $item['eazign'] ) ) {
			return $data;
		}
		$e      = $item['eazign'];
		$data[] = array(
			'key'   => __( 'Print sides', 'eazign' ),
			'value' => implode( ', ', $e['sides'] ),
		);
		if ( ! empty( $e['size'] ) ) {
			$data[] = array(
				'key'   => __( 'Size', 'eazign' ),
				'value' => $e['size'],
			);
		}
		foreach ( $e['lines'] as $line ) {
			$data[] = array(
				'key'     => $line['label'],
				'value'   => wp_strip_all_tags( wc_price( $line['amount'] ) ),
				'display' => wc_price( $line['amount'] ),
			);
		}
		return $data;
	}

	/**
	 * Design preview as cart thumbnail.
	 *
	 * @param string $html Thumbnail.
	 * @param array  $item Cart item.
	 * @return string
	 */
	public static function thumbnail( $html, $item ) {
		if ( empty( $item['eazign']['preview'] ) ) {
			return $html;
		}
		return sprintf( '<img src="%s" alt="%s" class="eazign-thumb" width="300" height="300" loading="lazy">', esc_url( $item['eazign']['preview'] ), esc_attr__( 'Your design', 'eazign' ) );
	}

	/**
	 * Design preview in the block cart and checkout.
	 *
	 * @param array $images Images.
	 * @param array $item   Cart item.
	 * @return array
	 */
	public static function store_api_images( $images, $item ) {
		if ( empty( $item['eazign']['preview'] ) ) {
			return $images;
		}
		$url = esc_url( $item['eazign']['preview'] );
		return array(
			(object) array(
				'id'        => 0,
				'src'       => $url,
				'thumbnail' => $url,
				'srcset'    => '',
				'sizes'     => '',
				'name'      => __( 'Your design', 'eazign' ),
				'alt'       => __( 'Your design', 'eazign' ),
			),
		);
	}

	/**
	 * Design data on the order line item. Keys with a leading underscore
	 * are hidden from the customer.
	 *
	 * @param WC_Order_Item_Product $item     Line item.
	 * @param string                $cart_key Cart item key.
	 * @param array                 $values   Cart item.
	 */
	public static function order_item( $item, $cart_key, $values ) {
		if ( empty( $values['eazign'] ) ) {
			return;
		}
		$e = $values['eazign'];
		$item->add_meta_data( '_eazign_design_id', $e['design_id'], true );
		$item->add_meta_data( '_eazign_preview', $e['preview'], true );
		$item->add_meta_data( __( 'Print sides', 'eazign' ), implode( ', ', $e['sides'] ), true );
		if ( ! empty( $e['size'] ) ) {
			$item->add_meta_data( __( 'Size', 'eazign' ), $e['size'], true );
		}
		foreach ( $e['lines'] as $line ) {
			$item->add_meta_data( $line['label'], wp_strip_all_tags( wc_price( $line['amount'] ) ), true );
		}
	}

	/**
	 * Design preview in order e-mails and the account area.
	 *
	 * @param string                $html Thumbnail.
	 * @param WC_Order_Item_Product $item Line item.
	 * @return string
	 */
	public static function order_thumbnail( $html, $item ) {
		$preview = $item->get_meta( '_eazign_preview' );
		return $preview ? sprintf( '<img src="%s" alt="%s" width="64" height="64" style="object-fit:contain">', esc_url( $preview ), esc_attr__( 'Your design', 'eazign' ) ) : $html;
	}
}