import { NextRequest, NextResponse } from 'next/server';
import { prisma } from '@/lib/db';
import { getSession, isAdmin } from '@/lib/auth';
import { Role } from '@/types';

export async function GET(request: NextRequest) {
  const session = await getSession();

  if (!session || !isAdmin(session.user.role as Role)) {
    return NextResponse.json({ error: 'Forbidden' }, { status: 403 });
  }

  const { searchParams } = new URL(request.url);
  const page = parseInt(searchParams.get('page') || '1');
  const limit = parseInt(searchParams.get('limit') || '20');
  const search = searchParams.get('search') || '';
  const filter = searchParams.get('filter'); // 'high-gci', 'incomplete', 'complete'

  const where: any = {};

  if (search) {
    where.OR = [
      { email: { contains: search, mode: 'insensitive' } },
      { firstName: { contains: search, mode: 'insensitive' } },
      { lastName: { contains: search, mode: 'insensitive' } },
      { brokerage: { contains: search, mode: 'insensitive' } },
    ];
  }

  const [users, total] = await Promise.all([
    prisma.user.findMany({
      where,
      include: {
        onboarding: true,
        setupStatus: true,
      },
      skip: (page - 1) * limit,
      take: limit,
      orderBy: { createdAt: 'desc' },
    }),
    prisma.user.count({ where }),
  ]);

  // Apply post-filters
  let filteredUsers = users;
  if (filter === 'high-gci') {
    filteredUsers = users.filter(u =>
      u.onboarding?.gciLast12Months?.includes('100') ||
      u.onboarding?.gciLast12Months?.includes('250')
    );
  } else if (filter === 'incomplete') {
    filteredUsers = users.filter(u =>
      !u.setupStatus?.smsConfigured ||
      !u.setupStatus?.emailConfigured
    );
  } else if (filter === 'complete') {
    filteredUsers = users.filter(u =>
      u.setupStatus?.smsConfigured &&
      u.setupStatus?.emailConfigured
    );
  }

  return NextResponse.json({
    users: filteredUsers.map(u => ({
      id: u.id,
      email: u.email,
      firstName: u.firstName,
      lastName: u.lastName,
      brokerage: u.brokerage,
      role: u.role,
      ghlLocationId: u.ghlLocationId,
      onboarding: u.onboarding,
      setupStatus: u.setupStatus,
      createdAt: u.createdAt,
    })),
    pagination: {
      page,
      limit,
      total,
      totalPages: Math.ceil(total / limit),
    },
  });
}