<?php
/**
 * SchemaProvider OAuth 设置校验（代理模式 / 各平台凭据 / HTTPS 地址）。
 *
 * @package AKSRT
 */

namespace AKSRT\Admin;

defined('ABSPATH') || exit;

trait SchemaProviderOAuthValidation {

	private function validate_oauth_settings(array $settings, array $stored = []): array {
		if (empty($settings['oauth_s'])) {
			return [];
		}

		$errors = [];
		$mode = sanitize_key((string) ($settings['oauth_proxy_mode'] ?? 'close'));
		$secret_configured = $this->oauth_secret_is_configured($settings['oauth_proxy_secret'] ?? '', $stored['oauth_proxy_secret'] ?? '');

		if ($mode === 'client') {
			$url = trim((string) ($settings['oauth_proxy_server_url'] ?? ''));
			if (!$this->is_secure_oauth_url($url)) {
				$errors[] = __('客户端代理模式需要有效的 HTTPS 服务端地址', 'aksrt');
			}
			if (!$secret_configured) {
				$errors[] = __('客户端代理模式需要代理 HMAC 密钥', 'aksrt');
			}
			if (empty($settings['oauth_proxy_client_providers']) || !is_array($settings['oauth_proxy_client_providers'])) {
				$errors[] = __('客户端代理模式至少需要启用一个登录平台', 'aksrt');
			}
			return $errors;
		}

		if ($mode === 'server') {
			if (!$secret_configured) {
				$errors[] = __('服务端代理模式需要代理 HMAC 密钥', 'aksrt');
			}
			$selected = is_array($settings['oauth_proxy_server_providers'] ?? null) ? $settings['oauth_proxy_server_providers'] : [];
			if ($selected === []) {
				$errors[] = __('服务端代理模式至少需要允许一个登录平台', 'aksrt');
			}
			$provider_fields = [
				'github' => ['GitHub', 'github_appid', 'github_appkey'],
				'gitee' => ['Gitee', 'gitee_appid', 'gitee_appkey'],
				'qq' => ['QQ', 'qq_appid', 'qq_appkey'],
				'google' => ['Google', 'google_client_id', 'google_client_secret'],
				'weibo' => ['微博', 'weibo_appid', 'weibo_appkey'],
				'weixin' => ['微信开放平台', 'weixin_appid', 'weixin_appsecret'],
			];
			foreach ($selected as $provider) {
				if (!isset($provider_fields[$provider])) {
					continue;
				}
				[$label, $id_key, $secret_key] = $provider_fields[$provider];
				if (trim((string) ($settings[$id_key] ?? '')) === '' || !$this->oauth_secret_is_configured($settings[$secret_key] ?? '', $stored[$secret_key] ?? '')) {
					$errors[] = sprintf(__('代理服务端的 %s 平台缺少完整凭据', 'aksrt'), $label);
				}
			}
			return $errors;
		}

		$providers = [
			'github' => ['GitHub', 'github_appid', 'github_appkey'],
			'gitee'  => ['Gitee', 'gitee_appid', 'gitee_appkey'],
			'qq'     => ['QQ', 'qq_appid', 'qq_appkey'],
			'google' => ['Google', 'google_client_id', 'google_client_secret'],
			'weibo'  => ['微博', 'weibo_appid', 'weibo_appkey'],
			'weixin' => ['微信开放平台', 'weixin_appid', 'weixin_appsecret'],
		];
		$enabled = 0;
		foreach ($providers as $provider => [$label, $id_key, $secret_key]) {
			if (empty($settings['oauth_' . $provider . '_s'])) {
				continue;
			}
			$enabled++;
			if (trim((string) ($settings[$id_key] ?? '')) === '' || !$this->oauth_secret_is_configured($settings[$secret_key] ?? '', $stored[$secret_key] ?? '')) {
				$errors[] = sprintf(__('%s 登录已启用，请填写完整凭据', 'aksrt'), $label);
			}
		}

		if (!empty($settings['oauth_weixingzh_s'])) {
			$enabled++;
			$gzh_type = sanitize_key((string) ($settings['weixingzh_gzh_type'] ?? 'service'));
			$base_ready = $this->oauth_secret_is_configured($settings['weixingzh_token'] ?? '', $stored['weixingzh_token'] ?? '')
				&& trim((string) ($settings['weixingzh_appid'] ?? '')) !== '';
			$mode_ready = $gzh_type === 'subscribe'
				? trim((string) ($settings['weixingzh_code_qrcode'] ?? '')) !== ''
					&& trim((string) ($settings['weixingzh_code_keyword'] ?? '')) !== ''
				: $this->oauth_secret_is_configured($settings['weixingzh_appsecret'] ?? '', $stored['weixingzh_appsecret'] ?? '');
			if (!$base_ready || !$mode_ready) {
				$errors[] = $gzh_type === 'subscribe'
					? __('微信公众号订阅号登录已启用，请填写 Token、AppID、二维码和回复关键词', 'aksrt')
					: __('微信公众号服务号登录已启用，请填写 Token、AppID 和 AppSecret', 'aksrt');
			}
		}

		if (!empty($settings['clogin_s'])) {
			$enabled++;
			if (!$this->is_secure_oauth_url((string) ($settings['clogin_url'] ?? ''))
				|| trim((string) ($settings['clogin_id'] ?? '')) === ''
				|| !$this->oauth_secret_is_configured($settings['clogin_key'] ?? '', $stored['clogin_key'] ?? '')
				|| empty($settings['clogin_oauth_s'])
			) {
				$errors[] = __('彩虹聚合登录已启用，请填写 HTTPS 接口地址、AppID、AppKey 并选择平台', 'aksrt');
			}
		}

		if ($enabled === 0) {
			$errors[] = __('启用第三方登录后，至少需要启用一个本地登录提供商', 'aksrt');
		}

		return $errors;
	}

	private function oauth_secret_is_configured($value, $stored_value = ''): bool {
		$value = trim((string) $value);
		if ($value === '***') {
			return trim((string) $stored_value) !== '';
		}
		return $value !== '';
	}

	private function is_secure_oauth_url(string $url): bool {
		$url = trim($url);
		if ($url === '' || filter_var($url, FILTER_VALIDATE_URL) === false) {
			return false;
		}
		$parts = wp_parse_url($url);
		return is_array($parts)
			&& strtolower((string) ($parts['scheme'] ?? '')) === 'https'
			&& !empty($parts['host'])
			&& empty($parts['user'])
			&& empty($parts['pass'])
			&& empty($parts['fragment']);
	}
}