import React, { useState, useEffect } from 'react';
import { useNavigate, useLocation, Link } from 'react-router-dom';
import { Hexagon, Lock, ArrowRight, Loader2, CheckCircle2, AlertCircle } from 'lucide-react';
import { resetPassword } from '../services/dataService';

export const ResetPassword: React.FC = () => {
  const navigate = useNavigate();
  const location = useLocation();
  const [isLoading, setIsLoading] = useState(false);
  const [password, setPassword] = useState('');
  const [confirmPassword, setPasswordConfirm] = useState('');
  const [error, setError] = useState('');
  const [isSuccess, setIsSuccess] = useState(false);
  const [token, setToken] = useState('');

  useEffect(() => {
    const params = new URLSearchParams(location.search);
    const t = params.get('token');
    if (!t) {
      setError('Token de recuperação ausente.');
    } else {
      setToken(t);
    }
  }, [location]);

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    if (password !== confirmPassword) {
      setError('As senhas não coincidem.');
      return;
    }
    
    setIsLoading(true);
    setError('');
    
    try {
      await resetPassword(password, token);
      setIsSuccess(true);
      setTimeout(() => navigate('/login'), 3000);
    } catch (err: any) {
      setError(err.message || 'Erro ao redefinir senha.');
    } finally {
      setIsLoading(false);
    }
  };

  return (
    <div className="min-h-screen bg-slate-50 flex flex-col justify-center py-12 sm:px-6 lg:px-8">
      <div className="sm:mx-auto sm:w-full sm:max-w-md">
        <div className="flex justify-center items-center gap-2 text-slate-900">
          <div className="bg-slate-900 text-white p-2 rounded-lg">
             <Hexagon size={28} fill="currentColor" />
          </div>
          <span className="text-3xl font-bold tracking-tight">Fasto<span className="text-yellow-500">.</span></span>
        </div>
        <h2 className="mt-6 text-center text-3xl font-bold tracking-tight text-slate-900">
          Nova senha
        </h2>
        <p className="mt-2 text-center text-sm text-slate-600">
          Escolha uma senha forte para sua segurança.
        </p>
      </div>

      <div className="mt-8 sm:mx-auto sm:w-full sm:max-w-md">
        <div className="bg-white py-8 px-4 shadow-xl shadow-slate-200/50 rounded-2xl sm:px-10 border border-slate-100">
          
          {isSuccess ? (
            <div className="text-center space-y-4 py-4">
              <div className="flex justify-center">
                <div className="bg-green-100 p-3 rounded-full text-green-600">
                  <CheckCircle2 size={32} />
                </div>
              </div>
              <h3 className="text-lg font-bold text-slate-900">Sucesso!</h3>
              <p className="text-sm text-slate-600">
                Sua senha foi redefinida. Redirecionando para o login...
              </p>
            </div>
          ) : (
            <form className="space-y-5" onSubmit={handleSubmit}>
              {!token && (
                <div className="bg-red-50 text-red-600 p-3 rounded-lg text-sm flex items-center gap-2">
                  <AlertCircle size={18} /> Link inválido ou expirado.
                </div>
              )}

              <div>
                <label htmlFor="password" senior-admin-password className="block text-sm font-medium text-slate-700">
                  Nova Senha
                </label>
                <div className="mt-1 relative rounded-md shadow-sm">
                  <div className="absolute inset-y-0 left-0 pl-3 flex items-center pointer-events-none">
                    <Lock className="h-5 w-5 text-slate-400" />
                  </div>
                  <input
                    id="password"
                    type="password"
                    required
                    disabled={!token}
                    value={password}
                    onChange={(e) => setPassword(e.target.value)}
                    className="block w-full pl-10 pr-3 py-2 border border-slate-300 rounded-lg bg-white focus:outline-none focus:ring-2 focus:ring-blue-100 focus:border-blue-500 sm:text-sm transition-all"
                    placeholder="••••••••"
                  />
                </div>
              </div>

              <div>
                <label htmlFor="confirmPassword" senior-admin-password className="block text-sm font-medium text-slate-700">
                  Confirmar Nova Senha
                </label>
                <div className="mt-1 relative rounded-md shadow-sm">
                  <div className="absolute inset-y-0 left-0 pl-3 flex items-center pointer-events-none">
                    <Lock className="h-5 w-5 text-slate-400" />
                  </div>
                  <input
                    id="confirmPassword"
                    type="password"
                    required
                    disabled={!token}
                    value={confirmPassword}
                    onChange={(e) => setPasswordConfirm(e.target.value)}
                    className="block w-full pl-10 pr-3 py-2 border border-slate-300 rounded-lg bg-white focus:outline-none focus:ring-2 focus:ring-blue-100 focus:border-blue-500 sm:text-sm transition-all"
                    placeholder="••••••••"
                  />
                </div>
              </div>

              {error && (
                <div className="text-red-500 text-sm font-medium text-center">
                  {error}
                </div>
              )}

              <div>
                <button
                  type="submit"
                  disabled={isLoading || !token}
                  className="w-full flex justify-center items-center gap-2 py-2.5 px-4 border border-transparent rounded-lg shadow-sm text-sm font-semibold text-white bg-slate-900 hover:bg-slate-800 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-slate-900 transition-all disabled:opacity-50"
                >
                  {isLoading ? (
                    <>
                      <Loader2 className="animate-spin h-4 w-4" />
                      Alterando...
                    </>
                  ) : (
                    <>
                      Redefinir Senha <ArrowRight className="h-4 w-4" />
                    </>
                  )}
                </button>
              </div>
            </form>
          )}

          <div className="mt-6">
            <div className="relative">
              <div className="absolute inset-0 flex items-center">
                <div className="w-full border-t border-slate-200" />
              </div>
              <div className="relative flex justify-center text-sm">
                <span className="px-2 bg-white text-slate-500 text-xs">
                  Desenvolvido por <a href="https://blyzer.com.br" target="_blank" rel="noopener noreferrer" className="text-blue-600 hover:underline">Blyzer</a>
                </span>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
  );
};
