<?php
/**
 * Spectra form block.
 *
 * @package Dealroot
 */

namespace Dealroot\Forms;

use Dealroot\Capture;

defined( 'ABSPATH' ) || exit;

/**
 * Captures the Spectra (Ultimate Addons for Gutenberg) form block. Spectra reports a
 * submission only when its notification email was sent.
 */
class Spectra_Forms extends Integration {

	/**
	 * {@inheritDoc}
	 */
	public static function is_available() {
		return defined( 'UAGB_VER' );
	}

	/**
	 * {@inheritDoc}
	 */
	public static function key() {
		return 'spectra';
	}

	/**
	 * {@inheritDoc}
	 */
	public static function label() {
		return 'Spectra';
	}

	/**
	 * {@inheritDoc}
	 */
	public function register() {
		add_action( 'uagb_form_success', array( $this, 'capture' ) );
	}

	/**
	 * Stores the submission.
	 *
	 * @param array $form_data Field label => value, plus the block ID.
	 */
	public function capture( $form_data ) {
		$form_data = (array) $form_data;
		$block_id  = preg_replace( '/[^A-Za-z0-9_-]/', '', (string) ( $form_data['id'] ?? '' ) );
		// Spectra has verified its own nonce for this request.
		$post_id = isset( $_POST['post_id'] ) ? absint( wp_unslash( $_POST['post_id'] ) ) : 0; // phpcs:ignore WordPress.Security.NonceVerification.Missing
		$fields  = array();

		unset( $form_data['id'] );

		foreach ( $form_data as $label => $value ) {
			$label    = trim( wp_strip_all_tags( html_entity_decode( (string) $label, ENT_QUOTES, 'UTF-8' ) ) );
			$fields[] = array(
				'label' => $label,
				'name'  => sanitize_title( $label ),
				'type'  => is_string( $value ) && is_email( $value ) ? 'email' : '',
				'value' => $value,
			);
		}

		$name = self::block_label( $post_id, $block_id );

		if ( '' === $name ) {
			$name = $post_id ? (string) get_the_title( $post_id ) : __( 'Spectra form', 'dealroot' );
		}

		Capture::submission( self::key(), $block_id, $name, $fields );
	}

	/**
	 * Label the form block was given in the editor.
	 *
	 * @param int    $post_id  Page ID.
	 * @param string $block_id Block ID.
	 * @return string
	 */
	private static function block_label( $post_id, $block_id ) {
		$post = $post_id ? get_post( $post_id ) : null;

		if ( ! $post || '' === $block_id || false === strpos( (string) $post->post_content, 'uagb/forms' ) ) {
			return '';
		}

		$block = self::find_block( parse_blocks( (string) $post->post_content ), $block_id );

		return $block ? (string) ( $block['attrs']['formLabel'] ?? '' ) : '';
	}

	/**
	 * Form block with the given ID, also inside other blocks.
	 *
	 * @param array  $blocks   Parsed blocks.
	 * @param string $block_id Block ID.
	 * @return array|null
	 */
	private static function find_block( array $blocks, $block_id ) {
		foreach ( $blocks as $block ) {
			if ( 'uagb/forms' === ( $block['blockName'] ?? '' ) && ( $block['attrs']['block_id'] ?? '' ) === $block_id ) {
				return $block;
			}

			$inner = ! empty( $block['innerBlocks'] ) ? self::find_block( $block['innerBlocks'], $block_id ) : null;

			if ( $inner ) {
				return $inner;
			}
		}

		return null;
	}
}