<?php

namespace app\support;

use support\think\Db;

class ShouqianbaConfigService
{
    private const GROUP = 'payment';
    private const SHOUQIANBA_NOTIFY_PATH = '/api/open/shouqianba/payment/notify';
    public const MINI_PROGRAM_PLUGIN_PROVIDER = 'wx7903bb295ac26ac7';

    public function getConfig(): array
    {
        $rows = Db::name('system_configs')
            ->where('config_group', self::GROUP)
            ->column('config_value', 'config_key');

        $expireMinutes = trim((string)($rows['order_expire_minutes'] ?? '1440'));
        if ($expireMinutes === '' || !ctype_digit($expireMinutes)) {
            $expireMinutes = '1440';
        }

        $workstationSn = trim((string)($rows['workstation_sn'] ?? '0'));
        if ($workstationSn === '') {
            $workstationSn = '0';
        }
        $industryCode = trim((string)($rows['industry_code'] ?? '0'));
        if ($industryCode === '') {
            $industryCode = '0';
        }
        $notifyUrl = trim((string)($rows['notify_url'] ?? ''));
        if ($notifyUrl === '') {
            $notifyUrl = $this->defaultNotifyUrl();
        }

        return [
            'enabled' => (string)($rows['enabled'] ?? 'disabled') === 'enabled',
            'api_domain' => rtrim(trim((string)($rows['api_domain'] ?? '')), '/'),
            'appid' => trim((string)($rows['appid'] ?? '')),
            'brand_code' => trim((string)($rows['brand_code'] ?? '')),
            'store_sn' => trim((string)($rows['store_sn'] ?? '')),
            'store_name' => trim((string)($rows['store_name'] ?? '')),
            'workstation_sn' => $workstationSn,
            'industry_code' => $industryCode,
            'order_expire_minutes' => max(1, min(43200, (int)$expireMinutes)),
            'merchant_private_key' => $this->normalizeKey((string)($rows['merchant_private_key'] ?? '')),
            'shouqianba_public_key' => $this->normalizeKey((string)($rows['shouqianba_public_key'] ?? ''), 'PUBLIC KEY'),
            'notify_url' => $notifyUrl,
            'mini_program_plugin_version' => trim((string)($rows['mini_program_plugin_version'] ?? '')),
        ];
    }

    public function assertReady(bool $requirePublicKey = false): array
    {
        $config = $this->getConfig();
        if (!$config['enabled']) {
            throw new \RuntimeException('收钱吧支付未启用，请先在后台系统配置中启用。');
        }

        $required = [
            'api_domain' => '收钱吧 API 域名',
            'appid' => '收钱吧 AppID',
            'brand_code' => '收钱吧品牌编号',
            'store_sn' => '门店编号',
            'workstation_sn' => '收银机编号',
            'industry_code' => '行业代码',
            'merchant_private_key' => '商户 RSA 私钥',
            'notify_url' => '支付通知地址',
        ];
        if ($requirePublicKey) {
            $required['shouqianba_public_key'] = '收钱吧 RSA 公钥';
        }

        foreach ($required as $key => $label) {
            if (trim((string)($config[$key] ?? '')) === '') {
                throw new \RuntimeException(sprintf('收钱吧支付配置未完成，请先填写%s。', $label));
            }
        }

        return $config;
    }

    public function h5OrderDetailUrl(int $orderId): string
    {
        $baseUrl = $this->h5PageBaseUrl();
        if ($baseUrl === '') {
            return '';
        }

        $fallbackQuery = http_build_query([
            'sqb_return_order_id' => $orderId,
        ], '', '&', PHP_QUERY_RFC3986);

        return $baseUrl . '/?' . $fallbackQuery . '#/pages/order/detail?id=' . $orderId;
    }

    public function miniProgramCallbackPath(int $orderId): string
    {
        return '/pages/order/detail?id=' . $orderId;
    }

    private function h5PageBaseUrl(): string
    {
        $value = (string)Db::name('system_configs')
            ->where('config_group', 'h5')
            ->where('config_key', 'page_base_url')
            ->value('config_value');
        $baseUrl = trim($value);
        if ($baseUrl === '') {
            return '';
        }

        $hashPos = strpos($baseUrl, '#');
        if ($hashPos !== false) {
            $baseUrl = substr($baseUrl, 0, $hashPos);
        }
        if (!preg_match('/^https?:\/\//i', $baseUrl)) {
            $baseUrl = 'https://' . ltrim($baseUrl, '/');
        }

        return rtrim($baseUrl, '/');
    }

    private function defaultNotifyUrl(): string
    {
        $baseUrl = trim((string)($_ENV['PUBLIC_FILE_BASE_URL'] ?? ''));
        if ($baseUrl === '') {
            $baseUrl = trim((string)Db::name('system_configs')
                ->where('config_group', 'file_storage')
                ->where('config_key', 'public_base_url')
                ->value('config_value'));
        }
        if ($baseUrl === '') {
            return '';
        }
        if (!preg_match('/^https?:\/\//i', $baseUrl)) {
            $baseUrl = 'https://' . ltrim($baseUrl, '/');
        }

        return rtrim($baseUrl, '/') . self::SHOUQIANBA_NOTIFY_PATH;
    }

    private function normalizeKey(string $value, string $pemLabel = ''): string
    {
        $value = trim($value);
        if ($value === '') {
            return '';
        }
        if (str_contains($value, '-----BEGIN')) {
            return $value;
        }
        if (is_file($value)) {
            $content = file_get_contents($value);
            return is_string($content) ? $this->normalizeKey($content, $pemLabel) : '';
        }
        if ($pemLabel !== '' && $this->looksLikeBase64KeyBody($value)) {
            $body = preg_replace('/\s+/', '', $value) ?: '';
            return sprintf(
                "-----BEGIN %s-----\n%s\n-----END %s-----",
                $pemLabel,
                rtrim(chunk_split($body, 64, "\n")),
                $pemLabel
            );
        }

        return $value;
    }

    private function looksLikeBase64KeyBody(string $value): bool
    {
        $body = preg_replace('/\s+/', '', trim($value));
        if (!is_string($body) || strlen($body) < 64) {
            return false;
        }

        return preg_match('/^[A-Za-z0-9+\/=]+$/', $body) === 1 && base64_decode($body, true) !== false;
    }
}