<?php
/**
 * Shortcodes
 *
 * @package SimplePay\Core
 * @copyright Copyright (c) 2020, Sandhills Development, LLC
 * @license http://opensource.org/licenses/gpl-2.0.php GNU Public License
 * @since 3.0.0
 */

namespace SimplePay\Core;

use SimplePay\Core\Abstracts\Form;
use SimplePay\Core\Forms\Default_Form;
use SimplePay\Core\Payments\Payment;
use SimplePay\Core\Payments\Payment_Confirmation;
use SimplePay\Core\Settings;
use SimplePay\Core\Utils;

use function SimplePay\Core\SimplePay;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Core Shortcodes Class
 *
 * Register and handle custom shortcodes.
 */
class Shortcodes {

	/**
	 * Constructor
	 */
	public function __construct() {

		// Add shortcodes.
		add_action( 'init', array( $this, 'register_shortcodes' ) );
	}

	/**
	 * Register shortcodes.
	 */
	public function register_shortcodes() {

		add_shortcode( 'simpay', array( $this, 'print_public_form' ) );
		add_shortcode( 'simpay_preview', array( $this, 'print_preview_form' ) );
		add_shortcode( 'simpay_payment_receipt', array( $this, 'print_payment_receipt' ), 10, 2 );

		// Deprecated.
		add_shortcode( 'simpay_error', array( $this, 'print_errors' ) );

		do_action( 'simpay_add_shortcodes' );
	}

	/**
	 * Error message shortcode
	 *
	 * @since unknown
	 * @since 3.6.0 Deprecated. Prints nothing.
	 *
	 * @return string
	 */
	public function print_errors() {
		return '';
	}

	/**
	 * Shortcode to render public paymetn form
	 *
	 * @since 3.0.0
	 *
	 * @param array $attributes Shortcode attributes.
	 * @return string
	 */
	public function print_public_form( $attributes ) {
		$args = shortcode_atts(
			array(
				'id' => null,
			),
			$attributes
		);

		$id   = absint( $args['id'] );
		$html = '';

		if ( $id > 0 ) {

			$form_post = get_post( $id );

			if ( ! $form_post ) {
				return '';
			}

			// Pending or Draft forms.
			if ( in_array( $form_post->post_status, array( 'pending', 'draft' ), true ) ) {

				// Only output if the current user can edit the form.
				if ( current_user_can( 'edit_posts', $form_post->id ) ) {
					$html .= '<strong>';
					$html .= esc_html__( 'This payment form is currently unpublished and will not be able to accept payments until it is published.', 'simple-pay' );
					$html .= '</strong>';

					$html .= self::form_html( $id );
				}

				// Published forms.
			} else {
				$html .= self::form_html( $id );
			}
		}

		return $html;
	}

	/**
	 * Shortcode to render payment form preview.
	 *
	 * @since 3.0.0
	 *
	 * @param array $attributes Shortcode attributes.
	 * @return string
	 */
	public function print_preview_form( $attributes ) {

		$args = shortcode_atts(
			array(
				'id' => null,
			),
			$attributes
		);

		$id = absint( $args['id'] );

		if ( $id > 0 ) {

			$form_post = get_post( $id );

			if ( $form_post && current_user_can( 'manage_options' ) ) {
				return self::form_html( $id );
			}
		}

		return '';
	}

	/**
	 * Private function for returning payment form html common between public & preview modes.
	 *
	 * @since 3.0.0
	 *
	 * @param int $form_id Payment Form ID.
	 * @return string
	 */
	private function form_html( $form_id ) {
		if ( false === simpay_is_rest_api_enabled() ) {
			return wpautop(
				esc_html__(
					'WP Simple Pay requires the WordPress REST API to be enabled to process payments.',
					'simple-pay'
				)
			);
		}

		$has_keys = simpay_check_keys_exist();

		// Show a notice to admins if they have not setup Stripe.
		if ( ! $has_keys && current_user_can( 'manage_options' ) ) {
			$stripe_account_settings_url = Settings\get_url( array(
				'section'    => 'stripe',
				'subsection' => 'account',
			) );

			return wp_kses_post(
				sprintf(
					/* translators: %1$s Opening anchor tag, do not translate. %2$s Closing anchor tag, do not translate. */
					__( 'Please complete your %1$sStripe Setup%2$s to view the payment form.', 'simple-pay' ),
					'<a href="' . esc_url( $stripe_account_settings_url ) . '">',
					'</a>'
				)
			);
			// Show nothing to guests if Stripe is not setup.
		} elseif ( ! $has_keys && ! current_user_can( 'manage_options' ) ) {
			return '';
		}

		try {
			$form = simpay_get_form( $form_id );

			if ( false !== $form ) {
				ob_start();

				$form->html();

				return ob_get_clean();
			} else {
				return '';
			}
		} catch ( \Exception $e ) {
			return Utils\handle_exception_message( $e );
		}
	}

	/**
	 * Prints payment details.
	 *
	 * Since 3.6.0 the shortcode can be a wrapped shortcode with content inside
	 * that will be parsed like the content in Settings > Payment Confirmation.
	 *
	 * @todo Maybe split out some of grunt work involved in collecting the necessary information.
	 * @todo Try to expand any available objects to reduce extra API calls.
	 *
	 * @since 3.0.0
	 *
	 * @param array  $atts Shortcode attributes.
	 * @param string $content Shortcode content.
	 * @return string
	 */
	public function print_payment_receipt( $atts = array(), $content = '' ) {
		$atts = shortcode_atts(
			array(),
			$atts,
			'simpay_payment_confirmation'
		);

		$payment_confirmation_data = array();

		try {
			$payment_confirmation_data = Payment_Confirmation\get_confirmation_data();

			if ( empty( $payment_confirmation_data ) ) {
				return Payment_Confirmation\get_error();
			}

			// Retrieve default content if nothing has been passed to the shortcode.
			if ( '' === $content ) {
				$content = Payment_Confirmation\get_content();
			}

			/**
			 * Filters the content of the confirmation shortcode.
			 *
			 * This allows different form types to parse the confirmation template tags differently.
			 *
			 * @since 3.6.0
			 *
			 * @param string $content Payment confirmation shortcode content.
			 * @param array  $payment_confirmation_data {
			 *   Contextual information about this payment confirmation.
			 *
			 *   @type \Stripe\Customer               $customer Stripe Customer
			 *   @type \SimplePay\Core\Abstracts\Form $form Payment form.
			 *   @type object                         $subscriptions Subscriptions associated with the Customer.
			 *   @type object                         $paymentintents PaymentIntents associated with the Customer.
			 * }
			 */
			$content = apply_filters( 'simpay_payment_confirmation_content', $content, $payment_confirmation_data );

			$content = Payment_Confirmation\Template_Tags\parse_content( $content, $payment_confirmation_data );

			/**
			 * Internal hook to allow legacy hooks that rely on "complete" payments.
			 *
			 * @since 3.6.0
			 *
			 * @param array $payment_confirmation_data {
			 *   Contextual information about this payment confirmation.
			 *
			 *   @type \Stripe\Customer               $customer Stripe Customer
			 *   @type \SimplePay\Core\Abstracts\Form $form Payment form.
			 *   @type object                         $subscriptions Subscriptions associated with the Customer.
			 *   @type object                         $paymentintents PaymentIntents associated with the Customer.
			 * }
			 * @param \SimplePay\Core\Abstracts\Form $form Payment form.
			 * @param array $_GET Get request variables.
			 */
			do_action(
				'_simpay_payment_confirmation',
				$payment_confirmation_data,
				$payment_confirmation_data['form'],
				$_GET
			);
		} catch ( \Exception $e ) {
			if ( current_user_can( 'manage_options' ) ) {
				$content = Utils\handle_exception_message( $e );
			} else {
				$content = Payment_Confirmation\get_error();
			}
		}

		/**
		 * Filters the HTML output before the payment confirmation.
		 *
		 * @since 3.0.0
		 * @since 3.7.0 Pass payment confirmation data.
		 *
		 * @param string
		 * @param array  $payment_confirmation_data Array of data to send to the Payment Confirmation template tags.
		 */
		$before_html = apply_filters(
			'simpay_before_payment_details',
			'<div class="simpay-payment-receipt-wrap">',
			$payment_confirmation_data
		);

		/**
		 * Filters the HTML output after the payment confirmation.
		 *
		 * @since 3.0.0
		 * @since 3.7.0 Pass payment confirmation data.
		 *
		 * @param string
		 * @param array  $payment_confirmation_data Array of data to send to the Payment Confirmation template tags.
		 */
		$after_html = apply_filters(
			'simpay_after_payment_details',
			'</div>',
			$payment_confirmation_data
		);

		$content = wpautop(
			do_shortcode( $content )
		);

		return $before_html . $content . $after_html;
	}
}