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';
import { assertBoundedMultipartHeaders, assertMultipartFiles } from '@/lib/multipart-request-guard';
import {
  boundedMultipartRequestLimiter,
  getBoundedMultipartFailure,
  MULTIPART_ROUTE_LIMITS,
} from '@/lib/multipart-route-limits';

// PUT /api/materials/update - 更新素材（包括预览图）
export async function PUT(request: NextRequest) {
  let releaseRequestSlot: (() => void) | null = null;
  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')) {
      assertBoundedMultipartHeaders(request.headers, MULTIPART_ROUTE_LIMITS.materialUpdateRequestBytes);
      releaseRequestSlot = await boundedMultipartRequestLimiter.acquire();
      const formData = await request.formData();
      assertMultipartFiles(formData, {
        fields: {
          previewImage: {
            maxCount: 1,
            maxFileBytes: MULTIPART_ROUTE_LIMITS.materialUpdatePreviewBytes,
            allowedMimeTypes: ['image/jpeg', 'image/png', 'image/webp', 'image/avif'],
          },
        },
        maxFiles: 1,
        maxTotalBytes: MULTIPART_ROUTE_LIMITS.materialUpdatePreviewBytes,
      });
      id = String(formData.get('id') || '');
      input = {
        productModel: String(formData.get('productModel') || ''),
        ...(formData.has('reportTitle')
          ? { 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') || ''),
        ...(formData.has('userId')
          ? { userId: formData.get('userId') as string | null }
          : {}),
        ...(formData.has('taskNo')
          ? { taskNo: formData.get('taskNo') as string | null }
          : {}),
        ...(formData.has('dingtalkApprovalNo')
          ? { dingtalkApprovalNo: formData.get('dingtalkApprovalNo') as string | null }
          : {}),
        ...(formData.has('taskDetailSourceType')
          ? { taskDetailSourceType: formData.get('taskDetailSourceType') as string | null }
          : {}),
        ...(formData.has('taskDetailRequesterUserId')
          ? { taskDetailRequesterUserId: formData.get('taskDetailRequesterUserId') as string | null }
          : {}),
        ...(formData.has('isFullSet')
          ? { 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,
      taskDetailRequesterUserId: (result.material as any).taskDetailRequesterUserId || null,
      taskDetailRequesterName: (result.material as any).taskDetailRequesterName || null,
    };
    
    return NextResponse.json(
      { message: '更新成功', material: response },
      { status: 200 }
    );
  } catch (error) {
    console.error('Update error:', error);
    const boundedFailure = getBoundedMultipartFailure(error);
    if (boundedFailure) {
      return NextResponse.json(
        { error: boundedFailure.message, code: boundedFailure.code },
        {
          status: boundedFailure.status,
          ...(boundedFailure.retryAfterSeconds
            ? { headers: { 'Retry-After': String(boundedFailure.retryAfterSeconds) } }
            : {}),
        },
      );
    }
    return NextResponse.json({ error: '更新失败，请稍后再试' }, { status: 500 });
  } finally {
    releaseRequestSlot?.();
  }
}