<?php
/**
 * Checkout block support.
 *
 * The script assets/blocks.js places the picker into the Checkout block and passes the choice to the
 * Store API as extension data (namespace "dayslot"). Every change is also sent with
 * extensionCartUpdate, which stores it in the session so the shipping price is recalculated.
 */

defined( 'ABSPATH' ) || exit;

use Automattic\WooCommerce\StoreApi\Exceptions\RouteException;
use Automattic\WooCommerce\StoreApi\Schemas\V1\CartSchema;
use Automattic\WooCommerce\StoreApi\Schemas\V1\CheckoutSchema;

function dayslot_register_store_api_data() {
	if ( ! function_exists( 'woocommerce_store_api_register_endpoint_data' ) ) {
		return;
	}
	$field = function ( $description ) {
		return array(
			'description' => $description,
			'type'        => array( 'string', 'null' ),
			'context'     => array( 'view', 'edit' ),
			'optional'    => true,
		);
	};
	woocommerce_store_api_register_endpoint_data(
		array(
			'endpoint'        => CheckoutSchema::IDENTIFIER,
			'namespace'       => 'dayslot',
			'schema_callback' => function () use ( $field ) {
				return array(
					'date'     => $field( 'Delivery date (Y-m-d)' ),
					'slot'     => $field( 'Time (HH:MM-HH:MM or HH:MM)' ),
					'variant'  => $field( 'Delivery option id' ),
					'mode'     => $field( 'delivery or pickup' ),
					'location' => $field( 'Pickup location id' ),
					'fields'   => $field( 'Extra fields (JSON)' ),
				);
			},
			'schema_type'     => ARRAY_A,
		)
	);

	// Data the block script reads back after each cart update (e.g. the distance message).
	woocommerce_store_api_register_endpoint_data(
		array(
			'endpoint'        => CartSchema::IDENTIFIER,
			'namespace'       => 'dayslot',
			'data_callback'   => function () {
				return array(
					'notice' => dayslot_checkout_notice(),
				);
			},
			'schema_callback' => function () {
				return array(
					'notice' => array(
						'description' => 'Message under the date picker',
						'type'        => 'object',
						'context'     => array( 'view' ),
						'readonly'    => true,
					),
				);
			},
			'schema_type'     => ARRAY_A,
		)
	);

	woocommerce_store_api_register_update_callback(
		array(
			'namespace' => 'dayslot',
			'callback'  => function ( $data ) {
				dayslot_session_set( dayslot_read_choice( (array) $data ) );
			},
		)
	);
}
if ( did_action( 'woocommerce_blocks_loaded' ) ) {
	dayslot_register_store_api_data();
} else {
	add_action( 'woocommerce_blocks_loaded', 'dayslot_register_store_api_data' );
}

/**
 * Validate + save when the block checkout is submitted.
 */
add_action(
	'woocommerce_store_api_checkout_update_order_from_request',
	function ( $order, $request ) {
		if ( ! dayslot_order_needs_date( $order ) ) {
			return;
		}
		$data   = isset( $request['extensions']['dayslot'] ) && is_array( $request['extensions']['dayslot'] ) ? $request['extensions']['dayslot'] : array();
		$choice = dayslot_read_choice( $data );

		$error = dayslot_validate_choice( $choice, dayslot_ctx_for_choice( $choice, dayslot_order_products( $order ) ) );
		if ( $error ) {
			throw new RouteException( 'dayslot_invalid_delivery_date', esc_html( $error ), 400 );
		}

		// The price shown must belong to what is being submitted.
		$session = dayslot_session_get();
		foreach ( array( 'date', 'slot', 'variant', 'mode', 'location' ) as $key ) {
			if ( (string) $session[ $key ] !== (string) $choice[ $key ] ) {
				dayslot_session_set( $choice );
				throw new RouteException( 'dayslot_price_changed', esc_html__( 'The delivery price has been updated for your choice. Please check the total and place the order again.', 'dayslot' ), 409 );
			}
		}

		dayslot_save_order_values( $order, $choice );
	},
	10,
	2
);

/**
 * Is the current page a Checkout block page?
 */
function dayslot_is_block_checkout() {
	$post = get_post();
	return $post && function_exists( 'has_block' ) && has_block( 'woocommerce/checkout', $post );
}

/**
 * Load the block helper on Checkout block pages only.
 */
add_action(
	'wp_enqueue_scripts',
	function () {
		if ( ! dayslot_is_checkout_page() || ! dayslot_is_block_checkout() || ! dayslot_cart_needs_date() ) {
			return;
		}
		$deps = array( 'dys-picker', 'wp-data' );
		foreach ( array( 'wc-blocks-checkout', 'wc-blocks-data-store' ) as $handle ) {
			if ( wp_script_is( $handle, 'registered' ) ) {
				$deps[] = $handle;
			}
		}
		wp_enqueue_script( 'dys-blocks', dayslot_asset( 'assets/blocks.js' ), $deps, DAYSLOT_VERSION, true );
		wp_add_inline_script(
			'dys-blocks',
			'window.dayslotBlock = ' . wp_json_encode(
				array(
					'initial'   => dayslot_session_get(),
					'placement' => dayslot_get_settings()['placement'],
					'manual'    => dayslot_manual_placement(),
				)
			) . ';',
			'before'
		);
	},
	20
);