<?php

namespace DeliciousBrains\WPMDB\Common;

use DeliciousBrains\WPMDB\Common\FormData\FormData;
use DeliciousBrains\WPMDB\WPMDBDI;

class Helpers {

	public static function getFormData() {
		return WPMDBDI::getInstance()->get( FormData::class )->getFormData();
	}

	/**
	 * Get transient key used for storing licence response.
	 *
	 * @param bool|int $initial_user_id Get transient key for a specific user.
	 * @param bool     $user_fallback   Whether to fallback to finding current or first users with licence key.
	 *
	 * @return string
	 */
	public static function get_licence_response_transient_key( $initial_user_id = false, $user_fallback = true ) {
		$key = WPMDB_LICENSE_RESPONSE_TRANSIENT;

		if ( $initial_user_id ) {
			$user = get_user_by( 'id', $initial_user_id );
			if ( $user ) {
				return "{$key}_{$initial_user_id}";
			}
		}

		if ( $user_fallback ) {
			$user_id = self::get_current_or_first_user_id_with_licence_key();
			if ( $user_id ) {
				return "{$key}_{$user_id}";
			}
		}

		return $key;
	}

	/**
	 * Get current user ID.
	 * If not logged in, looks for first user with a licence key.
	 *
	 * @return false|int
	 */
	public static function get_current_or_first_user_id_with_licence_key() {
		if ( ( defined( 'DOING_AJAX' ) && DOING_AJAX ) || ( defined( 'REST_REQUEST' ) && REST_REQUEST ) || ( defined( 'WP_CLI' ) && WP_CLI ) || is_admin() ) {
			if ( is_user_logged_in() ) {
				return get_current_user_id();
			}

			$user_query = new \WP_User_Query( [
				'number'       => 1,
				'meta_key'     => WPMDB_LICENSE_KEY_USER_META,
				'meta_value'   => '',
				'meta_compare' => '!=',
			] );

			$users = $user_query->get_results();

			if ( ! empty( $users ) && ! is_wp_error( $users ) ) {
				return $users[0]->ID;
			}
		}

		return false;
	}

	/**
	 * Get user defined licence key.
	 *
	 * @param bool $user_id User ID to which retrieve licence for.
	 *
	 * @return false|string
	 */
	public static function get_user_licence_key( $user_id = false ) {
		if ( ! $user_id ) {
			$user_id = get_current_user_id();
		}
		$licence = get_user_meta( $user_id, WPMDB_LICENSE_KEY_USER_META, true );

		if ( ! $licence || empty( $licence ) ) {
			return false;
		}

		return $licence;
	}
}