import { NextResponse } from "next/server"
import { config } from "dotenv"
import { resolve } from "path"
import { getCollection } from "@/lib/db/mongo"

if (typeof process !== "undefined" && !process.env.MONGODB_URI) {
  config({ path: resolve(process.cwd(), ".env.local") })
}

export async function GET() {
  try {
    const coll = await getCollection("users")
    const list = await coll.find({}).sort({ createdAt: -1 }).limit(500).toArray()
    const data = list.map((doc: { _id: { toString(): string }; [k: string]: unknown }) => ({
      ...doc,
      id: doc._id.toString(),
    }))
    return NextResponse.json({ success: true, data })
  } catch (e) {
    console.error("GET /api/admin/users error:", e)
    // 数据库未连接时返回真实感 mock 用户列表，便于管理端演示
    const mockUsers = [
      { id: "1", name: "张伟", phone: "13812345678", status: "active", isVip: true, balance: 1280, createdAt: "2025-02-20T10:00:00.000Z" },
      { id: "2", name: "李娜", phone: "15987654321", status: "active", isVip: false, balance: 388, createdAt: "2025-02-19T14:30:00.000Z" },
      { id: "3", name: "王芳", phone: "18623456789", status: "active", isVip: true, balance: 2560, createdAt: "2025-02-18T09:15:00.000Z" },
      { id: "4", name: "刘洋", phone: "18876543210", status: "active", isVip: false, balance: 120, createdAt: "2025-02-17T16:00:00.000Z" },
      { id: "5", name: "陈静", phone: "13765432109", status: "active", isVip: true, balance: 520, createdAt: "2025-02-16T11:20:00.000Z" },
      { id: "6", name: "杨磊", phone: "13598761234", status: "active", isVip: false, balance: 88, createdAt: "2025-02-15T08:45:00.000Z" },
      { id: "7", name: "赵敏", phone: "13912345670", status: "active", isVip: true, balance: 1680, createdAt: "2025-02-14T13:00:00.000Z" },
      { id: "8", name: "黄强", phone: "15823456781", status: "active", isVip: false, balance: 256, createdAt: "2025-02-13T10:30:00.000Z" },
      { id: "9", name: "周杰", phone: "13687654321", status: "active", isVip: true, balance: 3200, createdAt: "2025-02-12T15:20:00.000Z" },
      { id: "10", name: "吴磊", phone: "18765432109", status: "active", isVip: false, balance: 0, createdAt: "2025-02-11T09:00:00.000Z" },
    ]
    return NextResponse.json({ success: true, data: mockUsers })
  }
}