<?php
/**
 * Forms helper class.
 *
 * @package AfriDirect_Payment
 */

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Forms helper class.
 */
class AfriDirect_Payment_Forms_Helper {

	/**
	 * Get form data by ID.
	 *
	 * @param int $form_id Form post ID.
	 * @return array|false Form data or false.
	 */
	public static function get_form( $form_id ) {
		$post = get_post( $form_id );

		if ( ! $post || 'afridirect_form' !== $post->post_type ) {
			return false;
		}

		$allowed_method_ids_raw = get_post_meta( $form_id, '_afridirect_form_allowed_method_ids', true );
		$allowed_method_ids = self::normalize_method_ids( $allowed_method_ids_raw );

		return array(
			'id'                  => $form_id,
			'title'               => $post->post_title,
			'mode'                => get_post_meta( $form_id, '_afridirect_form_mode', true ) ?: 'fixed',
			'fixed_amount'        => floatval( get_post_meta( $form_id, '_afridirect_form_fixed_amount', true ) ),
			'min_amount'          => floatval( get_post_meta( $form_id, '_afridirect_form_min_amount', true ) ),
			'max_amount'          => floatval( get_post_meta( $form_id, '_afridirect_form_max_amount', true ) ),
			'currency'            => get_post_meta( $form_id, '_afridirect_form_currency', true ) ?: 'USD',
			'allowed_method_ids'  => $allowed_method_ids,
			'require_name'        => get_post_meta( $form_id, '_afridirect_form_require_name', true ) !== '0',
			'require_email'       => get_post_meta( $form_id, '_afridirect_form_require_email', true ) !== '0',
			'require_phone'       => get_post_meta( $form_id, '_afridirect_form_require_phone', true ) === '1',
			'success_message'     => get_post_meta( $form_id, '_afridirect_form_success_message', true ) ?: __( 'Your payment request has been created. Taking you to the payment instructions...', 'afridirect-payment' ),
			'button_text'        => get_post_meta( $form_id, '_afridirect_form_button_text', true ) ?: __( 'Continue', 'afridirect-payment' ),
		);
	}

	/**
	 * Normalize method IDs from various formats to array.
	 *
	 * @param mixed $method_ids Method IDs (array, serialized string, comma-separated string, etc.).
	 * @return array Normalized array of method IDs.
	 */
	public static function normalize_method_ids( $method_ids ) {
		// If already an array, validate and return.
		if ( is_array( $method_ids ) ) {
			// Filter out empty values and ensure they're strings.
			$method_ids = array_filter( array_map( 'sanitize_key', $method_ids ) );
			return array_values( $method_ids ); // Re-index.
		}

		// If empty or false, return empty array.
		if ( empty( $method_ids ) ) {
			return array();
		}

		// If it's a string, try to unserialize first (WordPress might have serialized it).
		if ( is_string( $method_ids ) ) {
			// Try to unserialize (WordPress serialized format).
			$unserialized = maybe_unserialize( $method_ids );
			if ( is_array( $unserialized ) ) {
				$method_ids = array_filter( array_map( 'sanitize_key', $unserialized ) );
				return array_values( $method_ids );
			}

			// Try comma-separated string.
			if ( strpos( $method_ids, ',' ) !== false ) {
				$method_ids = array_map( 'trim', explode( ',', $method_ids ) );
				$method_ids = array_filter( array_map( 'sanitize_key', $method_ids ) );
				return array_values( $method_ids );
			}

			// Single value as string.
			$sanitized = sanitize_key( $method_ids );
			return ! empty( $sanitized ) ? array( $sanitized ) : array();
		}

		// Fallback: empty array.
		return array();
	}
}