<?php

namespace app\support;

use support\think\Db;

class MaterialLocalResourceService
{
    public const RETENTION_MESSAGE = '系统仅保留3个批次图片';

    public function qrRelativePath(string $batchNo, string $verifyCode): string
    {
        return sprintf(
            'uploads/material-qrcodes/%s/%s.png',
            $this->safeName($batchNo, 'batch'),
            $this->safeName($verifyCode, 'code')
        );
    }

    public function qrBatchDirectory(string $batchNo): string
    {
        return 'uploads/material-qrcodes/' . $this->safeName($batchNo, 'batch');
    }

    public function packageRelativePath(string $batchNo): string
    {
        $safeBatchNo = $this->safeName($batchNo, 'batch');
        return sprintf(
            'uploads/material-packages/%s/material-batch-%s.zip',
            $safeBatchNo,
            $safeBatchNo
        );
    }

    public function packageBatchDirectory(string $batchNo): string
    {
        return 'uploads/material-packages/' . $this->safeName($batchNo, 'batch');
    }

    public function materialTagTemplatePath(): string
    {
        return dirname(__DIR__, 2) . '/resources/material-tag-template.jpg';
    }

    public function publicPath(string $relativePath): string
    {
        return public_path() . '/' . ltrim($relativePath, '/');
    }

    public function publicUrl(string $relativePath): string
    {
        $baseUrl = $this->localBaseUrl();
        if ($baseUrl === '') {
            throw new \RuntimeException('本地文件公开访问域名未配置，无法生成二维码下载链接');
        }

        return rtrim($baseUrl, '/') . '/' . ltrim($relativePath, '/');
    }

    public function ensureParentDirectory(string $filePath): void
    {
        $dir = dirname($filePath);
        if (!is_dir($dir) && !mkdir($dir, 0775, true) && !is_dir($dir)) {
            throw new \RuntimeException('本地文件目录创建失败');
        }
    }

    public function deleteBatchResources(string $batchNo): void
    {
        $this->deleteDirectory($this->publicPath($this->qrBatchDirectory($batchNo)));
        $this->deleteDirectory($this->publicPath($this->packageBatchDirectory($batchNo)));
    }

    public function deleteDirectory(string $dir): void
    {
        if (!is_dir($dir)) {
            return;
        }

        $items = scandir($dir);
        if ($items === false) {
            return;
        }

        foreach ($items as $item) {
            if ($item === '.' || $item === '..') {
                continue;
            }

            $path = $dir . DIRECTORY_SEPARATOR . $item;
            if (is_dir($path)) {
                $this->deleteDirectory($path);
                continue;
            }
            if (is_file($path)) {
                @unlink($path);
            }
        }

        @rmdir($dir);
    }

    public function safeName(string $value, string $fallback): string
    {
        $safe = preg_replace('/[^a-zA-Z0-9_-]/', '-', trim($value));
        $safe = trim((string)$safe, '-_');
        return $safe !== '' ? $safe : $fallback;
    }

    private function localBaseUrl(): string
    {
        foreach (['MATERIAL_LOCAL_BASE_URL', 'APP_PUBLIC_BASE_URL', 'PUBLIC_FILE_BASE_URL'] as $key) {
            $value = trim((string)($_ENV[$key] ?? ''));
            if ($value !== '') {
                return $this->normalizeBaseUrl($value);
            }
        }

        $notifyUrl = Db::name('system_configs')
            ->where('config_group', 'payment')
            ->where('config_key', 'notify_url')
            ->value('config_value');
        if (is_string($notifyUrl) && trim($notifyUrl) !== '') {
            return $this->extractOrigin($notifyUrl);
        }

        if (!in_array(strtolower((string)($_ENV['APP_ENV'] ?? '')), ['production', 'prod'], true)) {
            return 'http://' . '127.0.0.' . '1:8787';
        }

        return '';
    }

    private function normalizeBaseUrl(string $baseUrl): string
    {
        $baseUrl = trim($baseUrl);
        if ($baseUrl === '') {
            return '';
        }
        if (!preg_match('/^https?:\/\//i', $baseUrl)) {
            $baseUrl = 'https://' . ltrim($baseUrl, '/');
        }
        return rtrim($baseUrl, '/');
    }

    private function extractOrigin(string $url): string
    {
        $parts = parse_url(trim($url));
        $scheme = (string)($parts['scheme'] ?? '');
        $host = (string)($parts['host'] ?? '');
        $port = (string)($parts['port'] ?? '');
        if ($host === '') {
            return $this->normalizeBaseUrl($url);
        }

        $origin = ($scheme !== '' ? $scheme : 'https') . '://' . $host;
        if ($port !== '' && !(($scheme === 'http' && $port === '80') || ($scheme === 'https' && $port === '443'))) {
            $origin .= ':' . $port;
        }
        return rtrim($origin, '/');
    }
}