import { useState } from "react"
import { useRouter } from "next/router"

export default function SignUp() {
  const [username, setUsername] = useState("")
  const [password, setPassword] = useState("")
  const [confirmPassword, setConfirmPassword] = useState("")
  const [error, setError] = useState("")
  const [loading, setLoading] = useState(false)
  const router = useRouter()

  const handleSubmit = async (e) => {
    e.preventDefault()
    setError("")
    setLoading(true)
    try {
      if (password !== confirmPassword) {
        setError("Senhas não coincidem")
        return
      }

      if (password.length < 6) {
        setError("Senha deve ter pelo menos 6 caracteres")
        return
      }

      const res = await fetch("/api/auth/register", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ username, password })
      })

      const data = await res.json()

      if (res.ok) {
        router.push("/signin")
      } else {
        setError(data.error || "Erro ao cadastrar")
      }
    } catch (err) {
      setError("Erro de conexão")
    } finally {
      setLoading(false)
    }
  }

  return (
    <div className="min-h-screen bg-gray-50 flex items-center justify-center">
      <div className="bg-white p-8 rounded-lg shadow-md w-96">
        <h2 className="text-2xl font-bold mb-6">Cadastrar - 1000Apps</h2>
        
        {error && (
          <div className="mb-4 bg-red-100 text-red-700 p-3 rounded">
            {error}
          </div>
        )}
        
        <form onSubmit={handleSubmit} className="space-y-4">
          <input
            type="text"
            placeholder="Nome de usuário"
            className="w-full p-2 border rounded"
            value={username}
            onChange={(e) => setUsername(e.target.value)}
            required
          />
          <input
            type="password"
            placeholder="Senha"
            className="w-full p-2 border rounded"
            value={password}
            onChange={(e) => setPassword(e.target.value)}
            required
            minLength={6}
          />
          <input
            type="password"
            placeholder="Confirmar senha"
            className="w-full p-2 border rounded"
            value={confirmPassword}
            onChange={(e) => setConfirmPassword(e.target.value)}
            required
          />
          <button 
            type="submit"
            disabled={loading}
            className="w-full bg-green-600 text-white py-2 rounded-lg disabled:opacity-50"
          >
            {loading ? "Cadastrando..." : "Cadastrar"}
          </button>
        </form>
        
        <p className="text-center mt-4 text-sm">
          Já tem conta?{" "}
          <a href="/signin" className="text-blue-600 hover:underline">
            Entrar
          </a>
        </p>
      </div>
    </div>
  )
}