'use client';

import { useState, FormEvent } from 'react';
import { useRouter } from 'next/navigation';
import Link from 'next/link';
import api from '@/lib/api';
import { saveAuth } from '@/lib/auth';

export default function RegisterPage() {
  const router = useRouter();
  const [form, setForm] = useState({
    tenantName: '', tenantDocument: '', tenantEmail: '',
    userName: '', userEmail: '', password: '',
  });
  const [error, setError] = useState('');
  const [loading, setLoading] = useState(false);

  function set(field: string, value: string) {
    setForm((prev) => ({ ...prev, [field]: value }));
  }

  async function handleSubmit(e: FormEvent) {
    e.preventDefault();
    setError('');
    setLoading(true);
    try {
      const { data } = await api.post('/auth/register', form);
      saveAuth(data);
      router.push('/');
    } catch (err: any) {
      setError(err.response?.data?.message ?? 'Erro ao criar conta');
    } finally {
      setLoading(false);
    }
  }

  return (
    <div className="min-h-screen flex items-center justify-center bg-[#FAF7F2] py-10">
      <div className="w-full max-w-md">
        <div className="text-center mb-8">
          <span className="text-3xl font-semibold tracking-tight text-[#0E0F12]">Klavo</span>
          <p className="text-sm text-[#0E0F12]/50 mt-1">Crie sua conta e comece agora</p>
        </div>

        <form onSubmit={handleSubmit} className="bg-white rounded-2xl border border-[#EAE4D9] p-8 space-y-4">
          {error && <div className="bg-red-50 text-red-700 text-sm px-4 py-3 rounded-lg">{error}</div>}

          <p className="text-xs font-semibold text-[#0E0F12]/40 uppercase tracking-wide">Dados da empresa</p>
          <div>
            <label className="block text-sm font-medium text-[#0E0F12] mb-1">Nome da empresa</label>
            <input className="input" required value={form.tenantName} onChange={(e) => set('tenantName', e.target.value)} placeholder="Agência XYZ" />
          </div>
          <div>
            <label className="block text-sm font-medium text-[#0E0F12] mb-1">CNPJ (sem máscara)</label>
            <input className="input" required minLength={14} maxLength={14} value={form.tenantDocument} onChange={(e) => set('tenantDocument', e.target.value)} placeholder="12345678000195" />
          </div>
          <div>
            <label className="block text-sm font-medium text-[#0E0F12] mb-1">E-mail da empresa</label>
            <input className="input" type="email" required value={form.tenantEmail} onChange={(e) => set('tenantEmail', e.target.value)} placeholder="contato@empresa.com" />
          </div>

          <p className="text-xs font-semibold text-[#0E0F12]/40 uppercase tracking-wide pt-2">Dados do administrador</p>
          <div>
            <label className="block text-sm font-medium text-[#0E0F12] mb-1">Seu nome</label>
            <input className="input" required value={form.userName} onChange={(e) => set('userName', e.target.value)} placeholder="João Silva" />
          </div>
          <div>
            <label className="block text-sm font-medium text-[#0E0F12] mb-1">Seu e-mail</label>
            <input className="input" type="email" required value={form.userEmail} onChange={(e) => set('userEmail', e.target.value)} placeholder="joao@empresa.com" />
          </div>
          <div>
            <label className="block text-sm font-medium text-[#0E0F12] mb-1">Senha</label>
            <input className="input" type="password" required minLength={8} value={form.password} onChange={(e) => set('password', e.target.value)} placeholder="mínimo 8 caracteres" />
          </div>

          <button type="submit" disabled={loading} className="btn-primary w-full">
            {loading ? 'Criando conta...' : 'Criar conta'}
          </button>
        </form>

        <p className="text-center text-sm text-[#0E0F12]/50 mt-4">
          Já tem conta?{' '}
          <Link href="/login" className="text-[#B7895A] hover:text-[#9E7248] transition-colors">Fazer login</Link>
        </p>
      </div>
    </div>
  );
}