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

function parseDisplayImages(value: string | null): string[] {
  if (!value) return []
  try {
    const parsed = JSON.parse(value)
    if (Array.isArray(parsed)) {
      return parsed.filter((item): item is string => typeof item === 'string' && item.trim().length > 0)
    }
  } catch (error) {
    console.warn('[UserFavorites] Failed to parse displayImages JSON:', error)
  }
  return value ? [value] : []
}

export const dynamic = 'force-dynamic'

export async function GET(req: NextRequest) {
  try {
    const session = await getServerSession(authOptions)
    if (!session?.user?.id) {
      return NextResponse.json({ error: '未登录' }, { status: 401 })
    }

    const favorites = await prisma.materialFavorite.findMany({
      where: { userId: session.user.id },
      include: {
        material: {
          select: {
            id: true,
            productModel: true,
            previewUrl: true,
            displayImages: true,
            materialType: true,
            categoryName: true,
            sceneName: true,
            renderer: true,
            downloadCount: true,
            likeCount: true,
            createdAt: true,
            userId: true,
            isPremium: true,
            zipFileSize: true,
          },
        },
      },
      orderBy: { createdAt: 'desc' },
    })

    const materials = favorites
      .map((favorite) => favorite.material)
      .filter((material): material is NonNullable<typeof material> => Boolean(material))
      .map((material) => rewriteMaterialStorageUrlsForClient({
        ...material,
        displayImages: parseDisplayImages(material.displayImages as unknown as string | null),
        zipFileSize: material.zipFileSize.toString(),
        isFavorited: true,
        isLiked: false,
      }))

    return NextResponse.json(materials)
  } catch (error) {
    console.error('[UserFavorites] GET error:', error)
    return NextResponse.json({ error: '获取收藏失败' }, { status: 500 })
  }
}