import { createFileRoute, useNavigate } from "@tanstack/react-router";
import { useEffect, useState } from "react";
import { toast } from "sonner";
import { supabase } from "@/integrations/supabase/client";
import logo from "@/assets/logo-ponto.png";

export const Route = createFileRoute("/login")({
  component: LoginPage,
  head: () => ({
    meta: [{ title: "Acessar painel — .PONTO" }],
  }),
});

function LoginPage() {
  const navigate = useNavigate();
  const [mode, setMode] = useState<"signin" | "signup">("signin");
  const [email, setEmail] = useState("");
  const [password, setPassword] = useState("");
  const [loading, setLoading] = useState(false);

  useEffect(() => {
    supabase.auth.getSession().then(({ data }) => {
      if (data.session) navigate({ to: "/admin" });
    });
  }, [navigate]);

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    if (password.length < 6) return toast.error("A senha precisa ter ao menos 6 caracteres.");
    setLoading(true);
    try {
      if (mode === "signup") {
        const { error } = await supabase.auth.signUp({
          email,
          password,
          options: { emailRedirectTo: `${window.location.origin}/admin` },
        });
        if (error) throw error;
        toast.success("Conta criada! Verifique seu e-mail para confirmar e depois faça login.");
        setMode("signin");
      } else {
        const { error } = await supabase.auth.signInWithPassword({ email, password });
        if (error) throw error;
        navigate({ to: "/admin" });
      }
    } catch (err) {
      const msg = err instanceof Error ? err.message : "Erro ao autenticar.";
      toast.error(msg);
    } finally {
      setLoading(false);
    }
  };

  return (
    <div className="min-h-screen flex items-center justify-center bg-gradient-to-br from-[#1a0033] to-[#3a0066] px-4">
      <div className="w-full max-w-md rounded-3xl border border-border bg-card p-8 shadow-2xl">
        <div className="mb-8 flex flex-col items-center">
          <img src={logo} alt=".PONTO" className="h-12 w-auto" />
          <h1 className="mt-4 text-2xl font-black uppercase">Painel administrativo</h1>
          <p className="mt-1 text-sm text-muted-foreground">
            {mode === "signin" ? "Acesse sua conta" : "Crie sua conta de admin"}
          </p>
        </div>

        <form onSubmit={handleSubmit} className="space-y-4">
          <input
            required
            type="email"
            value={email}
            onChange={(e) => setEmail(e.target.value)}
            placeholder="E-mail"
            className="w-full rounded-xl border border-border bg-background px-4 py-3 text-sm outline-none focus:border-primary"
          />
          <input
            required
            type="password"
            value={password}
            onChange={(e) => setPassword(e.target.value)}
            placeholder="Senha (mín. 6 caracteres)"
            className="w-full rounded-xl border border-border bg-background px-4 py-3 text-sm outline-none focus:border-primary"
          />
          <button
            type="submit"
            disabled={loading}
            className="w-full rounded-xl bg-[#3DFF8A] py-4 font-black uppercase text-black transition-transform hover:scale-[1.02] disabled:opacity-60"
          >
            {loading ? "Aguarde..." : mode === "signin" ? "Entrar" : "Criar conta"}
          </button>
        </form>

        <button
          onClick={() => setMode(mode === "signin" ? "signup" : "signin")}
          className="mt-6 w-full text-center text-sm text-muted-foreground hover:text-primary"
        >
          {mode === "signin" ? "Não tem conta? Criar acesso" : "Já tenho conta — entrar"}
        </button>
      </div>
    </div>
  );
}