import { NextRequest, NextResponse } from 'next/server';
import { getServerSession } from 'next-auth';
import { authOptions } from '@/lib/auth';
import { prisma } from '@/lib/prisma';
import { normalizeMaterial } from '@/lib/utils';
import { rewriteMaterialStorageUrlsForClient } from '@/lib/url-rewrite';

// 解析 displayImages 字段
function parseDisplayImages(displayImages: any): string[] {
  if (!displayImages) return [];
  
  if (Array.isArray(displayImages)) {
    return displayImages.filter(img => typeof img === 'string' && img.trim().length > 0);
  }
  
  if (typeof displayImages === 'string') {
    try {
      const parsed = JSON.parse(displayImages);
      if (Array.isArray(parsed)) {
        return parsed.filter(img => typeof img === 'string' && img.trim().length > 0);
      }
    } catch (e) {
      console.warn('[user/materials] Failed to parse displayImages JSON, fallback to single value:', e);
    }
    return displayImages.trim() ? [displayImages] : [];
  }
  
  return [];
}

// GET - 获取当前用户上传的素材
export async function GET(request: NextRequest) {
  try {
    const session = await getServerSession(authOptions);

    if (!session?.user || !(session.user as any).id) {
      return NextResponse.json({ error: '未登录' }, { status: 401 });
    }

    const userId = (session.user as any).id;

    const materials = await prisma.material.findMany({
      where: {
        userId,
        deletedAt: null,
      },
      select: {
        id: true,
        userId: true,
        productModel: true,
        previewUrl: true,
        displayImages: true,
        materialType: true,
        categoryName: true,
        sceneName: true,
        platformName: true,
        productCategoryName: true,
        renderer: true,
        downloadCount: true,
        likeCount: true,
        createdAt: true,
        videoSourceUrl: true,
        videoPreview540Url: true,
        videoPreviewClipUrl: true,
        videoCoverUrl: true,
        videoProcessingStatus: true,
        videoDuration: true,
        zipFileName: true,
        zipFileSize: true,
      } as any,
      orderBy: {
        createdAt: 'desc',
      },
    });

    const formattedMaterials = materials.map((material: any) => {
      const zipFileSize = typeof material.zipFileSize === 'bigint'
        ? material.zipFileSize.toString()
        : material.zipFileSize ?? null;

      const formatted = {
        ...material,
        zipFileSize,
        displayImages: parseDisplayImages(material.displayImages || null),
      };

      // 使用智能 URL 重写（根据用户网络位置选择内网或外网地址）
      return rewriteMaterialStorageUrlsForClient(normalizeMaterial(formatted), request);
    });

    return NextResponse.json(formattedMaterials);
  } catch (error: any) {
    // 兼容旧版本数据库（没有deletedAt字段）
    if (error?.meta?.column?.includes('deletedAt')) {
      try {
        const session = await getServerSession(authOptions);

        if (!session?.user || !(session.user as any).id) {
          return NextResponse.json({ error: '未登录' }, { status: 401 });
        }

        const userId = (session.user as any).id;

        const materials = await prisma.material.findMany({
          where: {
            userId,
          },
          select: {
            id: true,
            userId: true,
            productModel: true,
            previewUrl: true,
            displayImages: true,
            materialType: true,
            categoryName: true,
            sceneName: true,
            platformName: true,
            productCategoryName: true,
            renderer: true,
            downloadCount: true,
            likeCount: true,
            createdAt: true,
            videoSourceUrl: true,
            videoPreview540Url: true,
            videoPreviewClipUrl: true,
            videoCoverUrl: true,
            videoProcessingStatus: true,
            videoDuration: true,
            zipFileName: true,
            zipFileSize: true,
          } as any,
          orderBy: {
            createdAt: 'desc',
          },
        });

        const formattedMaterials = materials.map((material: any) => {
          const zipFileSize = typeof material.zipFileSize === 'bigint'
            ? material.zipFileSize.toString()
            : material.zipFileSize ?? null;

          const formatted = {
            ...material,
            zipFileSize,
            displayImages: Array.isArray(material.displayImages)
              ? material.displayImages
              : material.displayImages
              ? [material.displayImages]
              : [],
          };

          return normalizeMaterial(formatted);
        });

        return NextResponse.json(formattedMaterials);
      } catch (fallbackError) {
        console.error('[UserMaterials] Fallback query error:', fallbackError);
        return NextResponse.json(
          { error: '获取素材列表失败' },
          { status: 500 }
        );
      }
    }

    console.error('[UserMaterials] GET error:', error);
    return NextResponse.json(
      { error: '获取素材列表失败' },
      { status: 500 }
    );
  }
}