/**
 * 回收站 API - 获取已删除的素材
 * 
 * GET: 获取所有已删除的素材（仅管理员）
 */

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'

export async function GET(req: NextRequest) {
  try {
    const session = await getServerSession(authOptions)

    if (!session || (session.user as any).role !== 'ADMIN') {
      return NextResponse.json(
        { error: '无权限' },
        { status: 403 }
      )
    }

    const { searchParams } = new URL(req.url)
    const page = parseInt(searchParams.get('page') || '1')
    const pageSize = parseInt(searchParams.get('pageSize') || '20')
    const skip = (page - 1) * pageSize

    // 获取已删除的素材
    const [deletedMaterials, total] = await Promise.all([
      prisma.material.findMany({
        where: {
          deletedAt: { not: null }, // 只返回已删除的素材
        },
        select: {
          id: true,
          userId: true,
          productModel: true,
          previewUrl: true,
          categoryName: true,
          sceneName: true,
          platformName: true,
          productCategoryName: true,
          materialType: true,
          renderer: true,
          authorName: true,
          createdAt: true,
          deletedAt: true,
          user: {
            select: {
              username: true,
            },
          },
        },
        orderBy: { deletedAt: 'desc' },
        skip,
        take: pageSize,
      } as any),
      prisma.material.count({
        where: {
          deletedAt: { not: null },
        },
      } as any),
    ])

    // 应用 URL 重写（根据用户网络位置选择内网或外网地址）
    const formatted = deletedMaterials.map((material: any) =>
      rewriteMaterialStorageUrlsForClient(material, req)
    )

    return NextResponse.json({
      materials: formatted,
      total,
      page,
      pageSize,
      totalPages: Math.ceil(total / pageSize),
    })
  } catch (error: any) {
    // 兼容旧数据库：如果 deletedAt 字段不存在
    if (error?.meta?.column?.includes('deletedAt')) {
      return NextResponse.json(
        { error: '回收站功能需要先运行数据库迁移' },
        { status: 400 }
      )
    }

    console.error('[Admin Trash] GET error:', error)
    return NextResponse.json(
      { error: '获取回收站列表失败' },
      { status: 500 }
    )
  }
}