import { NextRequest, NextResponse } from 'next/server';
import { getServerSession } from 'next-auth';
import { authOptions } from '@/lib/auth';
import { updateMaterialWithSharedRules, type MaterialUpdateInput } from '@/lib/material-update';
import { isWebFileLike } from '@/lib/web-file';

// PUT /api/materials/update - 更新素材（包括预览图）
export async function PUT(request: NextRequest) {
  try {
    const session = await getServerSession(authOptions);
    if (!session?.user) {
      return NextResponse.json({ error: '请先登录' }, { status: 401 });
    }
    
    const contentType = request.headers.get('content-type') || '';
    let id = '';
    let input: MaterialUpdateInput;
    let previewImage: File | null = null;

    if (contentType.includes('multipart/form-data')) {
      const formData = await request.formData();
      id = String(formData.get('id') || '');
      input = {
        productModel: String(formData.get('productModel') || ''),
        reportTitle: formData.get('reportTitle') as string | null,
        categoryName: formData.get('categoryName') as string | null,
        sceneName: formData.get('sceneName') as string | null,
        platformName: formData.get('platformName') as string | null,
        productCategoryName: formData.get('productCategoryName') as string | null,
        materialType: String(formData.get('materialType') || ''),
        renderer: formData.get('renderer') as string | null,
        authorName: String(formData.get('authorName') || ''),
        userId: formData.get('userId') as string | null,
        taskNo: formData.get('taskNo') as string | null,
        taskDetailSourceType: formData.get('taskDetailSourceType') as string | null,
        isFullSet: formData.get('isFullSet') as string | null,
      };
      const formPreview = formData.get('previewImage');
      previewImage = isWebFileLike(formPreview) ? formPreview : null;
    } else {
      const json = await request.json();
      id = String(json.id || '');
      input = json;
    }

    if (!id) {
      return NextResponse.json({ error: '缺少素材ID' }, { status: 400 });
    }

    const user = session.user as any;
    const result = await updateMaterialWithSharedRules({
      materialId: id,
      operatorUserId: user.id,
      operatorRole: user.role,
      input,
      previewImage,
    });

    if ('error' in result) {
      return NextResponse.json({ error: result.error }, { status: result.status });
    }

    const response = {
      ...result.material,
      zipFileSize: result.material.zipFileSize.toString(),
      isFullSet: Boolean((result.material as any).isFullSet),
      taskDetailSourceType: (result.material as any).taskDetailSourceType || null,
    };
    
    return NextResponse.json(
      { message: '更新成功', material: response },
      { status: 200 }
    );
  } catch (error) {
    console.error('Update error:', error);
    return NextResponse.json({ error: '更新失败，请稍后再试' }, { status: 500 });
  }
}