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

// GET /api/users/list - 获取用户列表（用于下拉选择）
export async function GET(request: NextRequest) {
  try {
    const session = await getServerSession(authOptions);
    if (!session?.user) {
      return NextResponse.json({ error: '请先登录' }, { status: 401 });
    }

    // 只返回人员选择器实际需要的最小字段，避免向普通登录用户暴露邮箱等信息。
    const users = await prisma.user.findMany({
      where: {
        isActive: true,
        status: 'active',
        archivedAt: null,
      },
      select: {
        id: true,
        username: true,
        realName: true,
      },
      orderBy: {
        username: 'asc',
      },
    });

    // 返回用户列表，优先显示真实姓名
    const userList = users.map(user => ({
      id: user.id,
      username: user.username,
      displayName: user.realName || user.username,
    }));

    return NextResponse.json(userList, { status: 200 });
  } catch (error) {
    console.error('Error fetching users:', error);
    return NextResponse.json({ error: '获取用户列表失败' }, { status: 500 });
  }
}