'use client';

import { useQuery } from '@tanstack/react-query';
import { Card, CardContent } from '@/components/ui/card';
import { Badge } from '@/components/ui/badge';
import { Button } from '@/components/ui/button';
import { Skeleton } from '@/components/ui/skeleton';
import {
  Table, TableBody, TableCell, TableHead, TableHeader, TableRow,
} from '@/components/ui/table';
import { UserPlus, Shield, User } from 'lucide-react';
import { api } from '@/lib/api';
import { format } from 'date-fns';

interface UserItem {
  id: string;
  firstName: string;
  lastName: string;
  email: string;
  isActive: boolean;
  createdAt: string;
  roleAssignments?: { role: string }[];
}

const ROLE_COLORS: Record<string, string> = {
  ADMIN: 'bg-purple-100 text-purple-700',
  STAFF: 'bg-blue-100 text-blue-700',
  TECHNICIAN: 'bg-orange-100 text-orange-700',
  COLLECTOR: 'bg-cyan-100 text-cyan-700',
};

export default function UsersSettingsPage() {
  const { data, isLoading } = useQuery({
    queryKey: ['users'],
    queryFn: async () => (await api.get('/api/v1/users')).data,
  });

  const users: UserItem[] = Array.isArray(data) ? data : (data?.data ?? []);

  return (
    <div>
      <div className="mb-6 flex items-center justify-between">
        <div>
          <h1 className="text-2xl font-bold text-slate-800">User Management</h1>
          <p className="text-slate-500 text-sm mt-1">Staff accounts and role assignments</p>
        </div>
        <Button style={{ backgroundColor: '#0891B2', color: 'white' }}>
          <UserPlus size={16} className="mr-2" />
          Add User
        </Button>
      </div>

      <Card>
        <CardContent className="p-0">
          <Table>
            <TableHeader>
              <TableRow>
                <TableHead>Name</TableHead>
                <TableHead>Email</TableHead>
                <TableHead>Roles</TableHead>
                <TableHead>Status</TableHead>
                <TableHead>Joined</TableHead>
              </TableRow>
            </TableHeader>
            <TableBody>
              {isLoading ? (
                Array.from({ length: 5 }).map((_, i) => (
                  <TableRow key={i}>{Array.from({ length: 5 }).map((_, j) => (
                    <TableCell key={j}><Skeleton className="h-4 w-full" /></TableCell>
                  ))}</TableRow>
                ))
              ) : users.length === 0 ? (
                <TableRow><TableCell colSpan={5} className="text-center py-12 text-slate-400">No users found</TableCell></TableRow>
              ) : (
                users.map((u) => {
                  const roles = u.roleAssignments?.map(r => r.role) ?? [];
                  return (
                    <TableRow key={u.id} className="hover:bg-slate-50">
                      <TableCell className="font-medium">{u.firstName} {u.lastName}</TableCell>
                      <TableCell className="text-sm text-slate-500">{u.email}</TableCell>
                      <TableCell>
                        <div className="flex gap-1 flex-wrap">
                          {roles.length === 0 ? <span className="text-xs text-slate-400">No role</span> :
                            roles.map(r => (
                              <span key={r} className={`inline-flex px-2 py-0.5 rounded-full text-xs font-medium ${ROLE_COLORS[r] ?? 'bg-gray-100 text-gray-600'}`}>{r}</span>
                            ))}
                        </div>
                      </TableCell>
                      <TableCell>
                        <span className={`inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium ${u.isActive ? 'bg-emerald-100 text-emerald-700' : 'bg-red-100 text-red-600'}`}>
                          {u.isActive ? 'Active' : 'Inactive'}
                        </span>
                      </TableCell>
                      <TableCell className="text-xs text-slate-400">
                        {format(new Date(u.createdAt), 'MMM d, yyyy')}
                      </TableCell>
                    </TableRow>
                  );
                })
              )}
            </TableBody>
          </Table>
        </CardContent>
      </Card>
    </div>
  );
}