<?php
/**
 * @package AKSRT
 */

namespace AKSRT\Auth;

defined('ABSPATH') || exit;

trait ServicePart1b {

	/**
	 * 手机号注册
	 *
	 * @param array $post POST 数据 (phone, code, password, ref)
	 * @return array{success: bool, user_id?: int, error?: string, redirect?: string}
	 */
	public static function register_by_phone(array $post, bool $verification_completed = false, bool $defer_login = false): array {
		$phone = sanitize_text_field((string) ($post['phone'] ?? ''));
		$pass  = (string) ($post['password'] ?? '');
		$confirm = (string) ($post['password_confirm'] ?? '');
		$username = sanitize_user(wp_unslash((string) ($post['user_login'] ?? '')), true);

		if (!\AKSRT\Sms\SMS::is_phonenumber($phone)) {
			return ['success' => false, 'error' => __('手机号格式不正确', 'aksrt')];
		}
		if (!$verification_completed) {
			return ['success' => false, 'error' => __('请先完成手机验证', 'aksrt')];
		}
		if ($username === '' || !validate_username($username) || mb_strlen($username) < 3 || mb_strlen($username) > 60) {
			return ['success' => false, 'error' => __('请输入 3-60 个字符的有效用户名', 'aksrt')];
		}
		if (username_exists($username)) {
			return ['success' => false, 'error' => __('该用户名已被使用', 'aksrt')];
		}
		if (class_exists('\AKSRT\Settings\Settings')) {
			foreach (\AKSRT\Settings\Settings::nickname_blacklist() as $keyword) {
				if ($keyword !== '' && mb_stripos($username, $keyword) !== false) {
					return ['success' => false, 'error' => __('用户名包含禁止使用的关键词', 'aksrt')];
				}
			}
			if (\AKSRT\Settings\Settings::signup_omit_password_confirmation()) {
				$confirm = $pass;
			}
			$agreement = \AKSRT\Settings\Settings::user_agreement_settings();
			if ((!empty($agreement['enabled']) || !empty($agreement['privacy'])) && !empty($agreement['required']) && empty($post['agree_terms'])) {
				return ['success' => false, 'error' => __('请先同意服务条款', 'aksrt')];
			}
		}
		$password_check = self::validate_password($pass, $confirm);
		if ($password_check !== true) {
			return ['success' => false, 'error' => $password_check];
		}

		// 检查手机号是否已注册
		$existing_user = self::get_user_by_phone($phone);
		if ($existing_user) {
			return ['success' => false, 'error' => __('该手机号已注册', 'aksrt')];
		}

		$ref_service = class_exists('\AKSRT\Payment\ReferralAttribution')
			? \AKSRT\Payment\ReferralAttribution::get_instance()
			: null;
		if ($ref_service) {
			$ref_service->clear_registration_context();
		}
		$registration = class_exists('\AKSRT\Settings\Settings')
			? \AKSRT\Settings\Settings::get_referral_registration_settings()
			: ['enabled' => false, 'register_field' => 'hidden', 'reject_invalid' => true];
		$submitted_ref = sanitize_key((string) ($post['ref'] ?? ''));
		$field_mode = !empty($registration['enabled'])
			? (string) ($registration['register_field'] ?? 'hidden')
			: 'hidden';
		$accept_submitted = !empty($registration['enabled']) && $field_mode !== 'hidden';
		$ref_context = $ref_service
			? $ref_service->prepare_registration($accept_submitted ? $submitted_ref : '')
			: ['valid' => false, 'submitted_valid' => false, 'conflict' => false, 'source' => 'none'];
		if ($field_mode === 'required' && empty($ref_context['valid'])) {
			if ($submitted_ref === '') {
				if ($ref_service) {
					$ref_service->clear_registration_context();
				}
				return ['success' => false, 'error' => __('请填写推广码', 'aksrt')];
			}
			if (!empty($registration['reject_invalid'])) {
				if ($ref_service) {
					$ref_service->clear_registration_context();
				}
				return ['success' => false, 'error' => __('推广码无效，请检查后重试', 'aksrt')];
			}
		}
		if ($submitted_ref !== '' && empty($ref_context['valid']) && !empty($registration['reject_invalid'])) {
			if ($ref_service) {
				$ref_service->clear_registration_context();
			}
			return ['success' => false, 'error' => __('推广码无效，请检查后重试', 'aksrt')];
		}

		$invite_service = class_exists('\AKSRT\Payment\InviteCode')
			? \AKSRT\Payment\InviteCode::get_instance()
			: null;
		if ($invite_service) {
			$invite_service->clear_registration_context();
			$invite_mode = $invite_service->field_mode();
			$submitted_invite = sanitize_key((string) ($post['invite_code'] ?? ''));
			if ($invite_mode === 'required' && $submitted_invite === '') {
				return ['success' => false, 'error' => __('请填写邀请码', 'aksrt')];
			}
			if ($submitted_invite !== '') {
				if (!$invite_service->is_valid($submitted_invite)) {
					return ['success' => false, 'error' => __('邀请码无效或已用完，请检查后重试', 'aksrt')];
				}
				$invite_service->set_registration_context($submitted_invite);
			}
		}

		// 创建用户
		$user_id = wp_create_user($username, $pass, '');
		if (is_wp_error($user_id)) {
			if ($ref_service) {
				$ref_service->clear_registration_context();
			}
			if ($invite_service) {
				$invite_service->clear_registration_context();
			}
			return ['success' => false, 'error' => $user_id->get_error_message()];
		}

		// 绑定手机号
		update_user_meta($user_id, 'phone_number', $phone);
		update_user_meta($user_id, 'aksrt_phone_verified', '1');

		// 自动登录
		$user = get_userdata($user_id);
			if (!$defer_login) {
			wp_set_current_user($user_id);
			wp_set_auth_cookie($user_id, true);
			if ($user instanceof \WP_User) {
				do_action('wp_login', $user->user_login, $user);
			}
		}

		$redirect = function_exists('aksrt_get_user_center_url')
			? aksrt_get_user_center_url()
			: home_url('/');

		return [
			'success'  => true,
			'user_id'  => $user_id,
			'redirect' => $redirect,
			'message'  => __('注册成功', 'aksrt'),
			'notice'   => $ref_service ? $ref_service->take_registration_notice() : '',
		];
	}

	/**
	 * 绑定手机号到当前用户
	 *
	 * @param array $post (phone, code)
	 * @return array
	 */
	public static function bind_phone(array $post, bool $verification_completed = false): array {
		if (!is_user_logged_in()) {
			return ['success' => false, 'error' => __('请先登录', 'aksrt')];
		}

		$phone = sanitize_text_field((string) ($post['phone'] ?? ''));
		if (!\AKSRT\Sms\SMS::is_phonenumber($phone)) {
			return ['success' => false, 'error' => __('手机号格式不正确', 'aksrt')];
		}

		if (!$verification_completed) {
			return ['success' => false, 'error' => __('验证码错误或已过期', 'aksrt')];
		}

		$user_id = get_current_user_id();
		$existing = self::get_user_by_phone($phone);
		if ($existing && (int) $existing->ID !== $user_id) {
			return ['success' => false, 'error' => __('该手机号已被其他账号绑定', 'aksrt')];
		}
		if ($existing && (int) $existing->ID === $user_id) {
			return ['success' => false, 'error' => __('手机号不能与当前绑定号码相同', 'aksrt')];
		}

		$old_phone = (string) get_user_meta($user_id, 'phone_number', true);
		update_user_meta($user_id, 'phone_number', $phone);
		update_user_meta($user_id, 'aksrt_phone_verified', '1');
		do_action('aksrt_user_phone_changed', $user_id, $phone, $old_phone);

		return [
			'success' => true,
			'message' => $old_phone !== '' ? __('手机号修改成功', 'aksrt') : __('手机号绑定成功', 'aksrt'),
		];
	}

	/**
	 * 根据手机号查找用户
	 */
	private static function get_user_by_phone(string $phone): ?\WP_User {
		$users = get_users([
			'meta_key'   => 'phone_number',
			'meta_value' => $phone,
			'number'     => 1,
			'fields'     => 'all',
		]);
		return !empty($users) ? $users[0] : null;
	}
}