import { NextRequest, NextResponse } from 'next/server';
import { prisma } from '@/lib/prisma';
import { access, stat } from 'fs/promises';
import path from 'path';
import { createDownloadError, DownloadErrorCode } from '@/lib/download-errors';

/**
 * 测试下载接口（绕过登录检查）
 * 仅用于开发和测试，生产环境应禁用
 */
export async function GET(request: NextRequest) {
  // 检查是否是测试环境
  if (process.env.NODE_ENV === 'production') {
    return NextResponse.json(
      { error: '此接口仅用于测试' },
      { status: 403 }
    );
  }

  const { searchParams } = new URL(request.url);
  const materialId = searchParams.get('id');

  if (!materialId) {
    return NextResponse.json(
      createDownloadError(DownloadErrorCode.INVALID_DOWNLOAD_TYPE, '缺少素材ID'),
      { status: 400 }
    );
  }

  try {
    const material = await prisma.material.findUnique({
      where: { id: materialId },
      select: {
        id: true,
        productModel: true,
        zipFilePath: true,
        materialType: true,
      },
    });

    if (!material) {
      return NextResponse.json(
        createDownloadError(DownloadErrorCode.MATERIAL_NOT_FOUND),
        { status: 404 }
      );
    }

    // 检查文件是否存在
    if (!material.zipFilePath) {
      console.log('[Test Download] No zipFilePath for material:', material.id);
      return NextResponse.json(
        createDownloadError(DownloadErrorCode.FILE_MISSING, '没有源文件'),
        { status: 404 }
      );
    }

    const filePath = path.join(process.cwd(), material.zipFilePath);

    try {
      await access(filePath);
      const fileStats = await stat(filePath);

      return NextResponse.json({
        message: '文件存在',
        materialId: material.id,
        productModel: material.productModel,
        filePath: material.zipFilePath,
        fileSize: fileStats.size,
      });
    } catch (error) {
      console.error('[Test Download] File not found:', filePath, 'error:', error);
      return NextResponse.json(
        createDownloadError(DownloadErrorCode.FILE_MISSING, '没有源文件'),
        { status: 404 }
      );
    }
  } catch (error) {
    console.error('[Test Download] Error:', error);
    return NextResponse.json(
      { error: '查询失败' },
      { status: 500 }
    );
  }
}