<?php

namespace Templately\API;

/**
 * Plugin-initiated checkout.
 *
 * Asks the backend for a frontend checkout URL carrying a short-lived login
 * token bound to the connected api_key account (no front-end re-login), and
 * hands it back to the React app, which redirects the buyer to it. After
 * payment the frontend returns the buyer to `return_url` with
 * `templately_purchase`.
 */
class Checkout extends API {

	public function register_routes() {
		$this->post( 'checkout', [ $this, 'checkout' ] );
	}

	public function checkout() {
		$purchase_type = $this->get_param( 'purchase_type', 'template' );
		$id            = $this->get_param( 'id', 0, 'intval' );
		$return_url    = $this->get_param( 'return_url', admin_url( 'admin.php?page=templately' ), 'esc_url_raw' );

		if ( empty( $id ) ) {
			return $this->error( 'invalid_checkout_item', __( 'No item selected for purchase.', 'templately' ), 'checkout', 422 );
		}

		$funcArgs = [
			'api_key'       => $this->api_key,
			'purchase_type' => $purchase_type,
			'id'            => $id,
			'return_url'    => $return_url,
		];

		foreach ( [ 'item_type', 'billing_interval', 'coupon' ] as $optional ) {
			$value = $this->get_param( $optional, '' );
			if ( ! empty( $value ) ) {
				$funcArgs[ $optional ] = $value;
			}
		}

		$response = $this->http()->mutation( 'pluginCheckout', 'status, message, data', $funcArgs )->post();

		if ( is_wp_error( $response ) ) {
			return $this->error( 'invalid_checkout_response', $response->get_error_message(), 'checkout' );
		}

		$data = ! empty( $response['data'] ) ? json_decode( $response['data'], true ) : [];

		// Frontend checkout URL created — the app redirects the buyer to it.
		if ( ! empty( $data['url'] ) ) {
			return $this->success( [ 'url' => $data['url'] ] );
		}

		$message = ! empty( $response['message'] ) ? $response['message'] : __( 'Could not start the checkout. Please try again.', 'templately' );

		return $this->error( 'checkout_failed', $message, 'checkout' );
	}
}