<?php

/**
 * Booking dates carried through the cart
 *
 * @link       #
 * @since      1.0.0
 *
 * @package    Abfw
 * @subpackage Abfw/Cart
 */

namespace AdvancedBooking\Cart;

use AdvancedBooking\Booking\Dates;
use AdvancedBooking\Settings;

/**
 * Checks the dates, keeps them on the cart line and prices the stay.
 *
 * @since      1.0.0
 * @package    Abfw
 * @subpackage Abfw/Cart
 */
class Cart {

	/**
	 * Refuse a bookable product added without valid dates.
	 *
	 * @since 1.0.0
	 * @param bool $passed       Whether the product may be added so far.
	 * @param int  $product_id   Product being added.
	 * @param int  $quantity     How many are being added.
	 * @param int  $variation_id Variation being added, when there is one.
	 * @return bool
	 */
	public function validate( $passed, $product_id, $quantity = 1, $variation_id = 0 ) {
		if ( ! Settings::is_bookable( $product_id ) ) {
			return $passed;
		}

		$booking = $this->read_request( $product_id, $variation_id );

		if ( ! is_wp_error( $booking ) ) {
			/**
			 * Whether dates the rules allow can still be booked: true, or the reason they cannot.
			 *
			 * @since 1.1.0
			 * @param true|\WP_Error $allowed      True so far.
			 * @param array          $booking      Dates asked for.
			 * @param int            $product_id   Product being added.
			 * @param int            $variation_id Variation being added, when there is one.
			 * @param int            $quantity     How many are being added.
			 */
			$allowed = apply_filters( 'abfw_check_booking', true, $booking, $product_id, $variation_id, $quantity );
			$booking = is_wp_error( $allowed ) ? $allowed : $booking;
		}

		if ( is_wp_error( $booking ) ) {
			wc_add_notice( $booking->get_error_message(), 'error' );

			return false;
		}

		return $passed;
	}

	/**
	 * Attach the dates to the cart line.
	 *
	 * @since 1.0.0
	 * @param array $item         Cart line data.
	 * @param int   $product_id   Product being added.
	 * @param int   $variation_id Variation being added, when there is one.
	 * @return array
	 */
	public function add_cart_item_data( $item, $product_id, $variation_id = 0 ) {
		if ( ! Settings::is_bookable( $product_id ) ) {
			return $item;
		}

		$booking = $this->read_request( $product_id, $variation_id );

		if ( ! is_wp_error( $booking ) ) {
			$item['abfw'] = $booking;
		}

		return $item;
	}

	/**
	 * Price the stay: the product price is charged for every night or day.
	 *
	 * The price always comes from the catalogue rather than from the line being
	 * priced, because the totals are computed several times in one request.
	 *
	 * @since 1.0.0
	 * @param \WC_Cart $cart Cart being totalled.
	 */
	public function set_prices( $cart ) {
		if ( is_admin() && ! wp_doing_ajax() ) {
			return;
		}

		foreach ( $cart->get_cart() as $item ) {
			if ( empty( $item['abfw']['units'] ) || ! isset( $item['data'] ) ) {
				continue;
			}

			$sold = wc_get_product( $item['variation_id'] ? $item['variation_id'] : $item['product_id'] );

			if ( ! $sold ) {
				continue;
			}

			$unit = self::unit_price( $item, $sold );

			/**
			 * The price of the whole stay, once the price of a night or day is multiplied.
			 *
			 * @since 1.1.0
			 * @param float       $price Price of the stay.
			 * @param float       $unit  Price of a single night or day.
			 * @param array       $item  Cart line being priced.
			 * @param \WC_Product $sold  Product being sold.
			 */
			$price = (float) apply_filters( 'abfw_stay_price', $unit * (int) $item['abfw']['units'], $unit, $item, $sold );

			$item['data']->set_price( $price );
		}
	}

	/**
	 * The price of one night or one day of a cart line, before it is multiplied.
	 *
	 * @since 1.1.0
	 * @param array       $item Cart line being priced, or one made up to price a stay.
	 * @param \WC_Product $sold Product being sold.
	 * @return float
	 */
	public static function unit_price( array $item, $sold ) {
		/**
		 * The price of one night or one day, before it is multiplied.
		 *
		 * @since 1.0.0
		 * @param float       $unit Price of a single night or day.
		 * @param array       $item Cart line being priced.
		 * @param \WC_Product $sold Product being sold.
		 */
		return (float) apply_filters( 'abfw_unit_price', (float) $sold->get_price( 'edit' ), $item, $sold );
	}

	/**
	 * Refuse a bookable product added outside the product page.
	 *
	 * The block shop and the store API carry no dates, so a booking taken there
	 * would reach the order with nothing to book.
	 *
	 * @since 1.0.0
	 * @param \WC_Product $product Product being added.
	 * @throws \Automattic\WooCommerce\StoreApi\Exceptions\RouteException When the product needs dates.
	 */
	public function validate_store_api( $product ) {
		if ( ! $product instanceof \WC_Product || ! Settings::is_bookable( $product->get_id() ) ) {
			return;
		}

		throw new \Automattic\WooCommerce\StoreApi\Exceptions\RouteException(
			'abfw_dates_required',
			esc_html__( 'Please choose your dates on the product page.', 'abogo-booking' ),
			400
		);
	}

	/**
	 * Show the dates under the product name in the cart and at checkout.
	 *
	 * @since 1.0.0
	 * @param array $data Lines already displayed.
	 * @param array $item Cart line.
	 * @return array
	 */
	public function display( $data, $item ) {
		if ( empty( $item['abfw'] ) ) {
			return $data;
		}

		$data[] = array(
			'name'  => __( 'Dates', 'abogo-booking' ),
			'value' => $this->format( $item['abfw'] ),
		);

		return $data;
	}

	/**
	 * Keep the dates on the order line, so the order reads on its own.
	 *
	 * @since 1.0.0
	 * @param \WC_Order_Item_Product $order_item Line being written.
	 * @param string                 $cart_key   Key of the cart line.
	 * @param array                  $item       Cart line.
	 */
	public function save_order_item( $order_item, $cart_key, $item ) {
		if ( empty( $item['abfw'] ) ) {
			return;
		}

		$order_item->add_meta_data( '_abfw_start', $item['abfw']['start'], true );
		$order_item->add_meta_data( '_abfw_end', $item['abfw']['end'], true );
		$order_item->add_meta_data( '_abfw_units', $item['abfw']['units'], true );
		$order_item->add_meta_data( __( 'Dates', 'abogo-booking' ), $this->format( $item['abfw'] ), true );
	}

	/**
	 * The dates as the customer reads them.
	 *
	 * @since 1.0.0
	 * @param array $booking Booking data held on the line.
	 * @return string
	 */
	public function format( array $booking ) {
		$format = get_option( 'date_format' );
		$start  = date_i18n( $format, strtotime( $booking['start'] ) );
		$end    = date_i18n( $format, strtotime( $booking['end'] ) );
		$length = 'days' === $booking['mode']
			/* translators: %s: number of days. */
			? sprintf( _n( '%s day', '%s days', $booking['units'], 'abogo-booking' ), number_format_i18n( $booking['units'] ) )
			/* translators: %s: number of nights. */
			: sprintf( _n( '%s night', '%s nights', $booking['units'], 'abogo-booking' ), number_format_i18n( $booking['units'] ) );

		if ( $booking['start'] === $booking['end'] ) {
			return $start;
		}

		/* translators: 1: start date, 2: end date, 3: length of the stay. */
		return sprintf( __( '%1$s to %2$s (%3$s)', 'abogo-booking' ), $start, $end, $length );
	}

	/**
	 * Read and check the dates posted with the add to cart form.
	 *
	 * @since 1.0.0
	 * @param int $product_id   Product being added.
	 * @param int $variation_id Variation being added, when there is one.
	 * @return array|\WP_Error
	 */
	private function read_request( $product_id, $variation_id = 0 ) {
		$start = $this->posted( 'abfw_start', $product_id );
		$end   = $this->posted( 'abfw_end', $product_id );

		return Dates::validate( $start, $end, $product_id, $variation_id );
	}

	/**
	 * One posted date, from the field of that product when a group posted several.
	 *
	 * @since 1.0.0
	 * @param string $name       Field name.
	 * @param int    $product_id Product being added.
	 * @return string
	 */
	private function posted( $name, $product_id ) {
		// phpcs:disable WordPress.Security.NonceVerification.Missing
		foreach ( array( $name . '_' . $product_id, $name ) as $key ) {
			if ( isset( $_POST[ $key ] ) ) {
				return sanitize_text_field( wp_unslash( $_POST[ $key ] ) );
			}
		}
		// phpcs:enable WordPress.Security.NonceVerification.Missing

		return '';
	}
}