import { useState, useEffect } from 'react';
import { useSearchParams, useNavigate } from 'react-router-dom'; // Importar useNavigate
import { AvisosService } from '../services/avisos.service';
import { AdsV2Service } from '../services/ads.v2.service';
import { AuthService, type UserSession } from '../services/auth.service';
import type { DatosAvisoDto } from '../types/aviso.types';
import FormularioAviso from '../components/FormularioAviso';
import LoginModal from '../components/LoginModal';

const TAREAS_DISPONIBLES = [
  { id: 'EAUTOS', label: 'Automóviles', icon: '🚗', description: 'Venta de Autos, Camionetas y Utilitarios' },
  { id: 'EMOTOS', label: 'Motos', icon: '🏍️', description: 'Venta de Motos, Cuatriciclos y Náutica' },
];

export default function PublicarAvisoPage() {
  const [searchParams] = useSearchParams();
  const navigate = useNavigate(); // Hook de navegación
  const editId = searchParams.get('edit');

  const [categorySelection, setCategorySelection] = useState<string>('');
  const [tarifas, setTarifas] = useState<DatosAvisoDto[]>([]);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);
  const [planSeleccionado, setPlanSeleccionado] = useState<DatosAvisoDto | null>(null);
  const [fixedCategory, setFixedCategory] = useState<string | null>(null);
  const [user, setUser] = useState<UserSession | null>(AuthService.getCurrentUser());

  useEffect(() => {
    if (editId) {
      cargarAvisoParaEdicion(parseInt(editId));
    }
  }, [editId]);

  const cargarAvisoParaEdicion = async (id: number) => {
    setLoading(true);
    try {
      const ad = await AdsV2Service.getById(id);

      // Determinamos la categoría para cargar las tarifas correspondientes
      const categoryCode = ad.vehicleTypeID === 1 ? 'EAUTOS' : 'EMOTOS';

      setCategorySelection(categoryCode);

      // 🟢 FIX: Bloquear el cambio de categoría
      setFixedCategory(categoryCode);

      // 🟢 FIX: NO seleccionamos plan automáticamente. 
      // Dejamos que el usuario elija el plan en las tarjetas.
      // (Eliminamos todo el bloque de setPlanSeleccionado)

      /* BLOQUE ELIMINADO:
      const tarifasData = await AvisosService.obtenerConfiguracion('EMOTORES', ad.isFeatured ? 1 : 0);
      const tarifaReal = tarifasData[0];
      if (!tarifaReal) throw new Error("Tarifa no encontrada");
      setPlanSeleccionado({ ... });
      */

    } catch (err) {
      console.error(err);
      setError("Error al cargar el aviso.");
    } finally {
      setLoading(false);
    }
  };

  useEffect(() => {
    if (!categorySelection) return;

    const cargarTarifas = async () => {
      setLoading(true);
      setError(null);
      try {
        const [simple, destacado] = await Promise.all([
          AvisosService.obtenerConfiguracion('EMOTORES', 0),
          AvisosService.obtenerConfiguracion('EMOTORES', 1)
        ]);

        const planes = [...simple, ...destacado];
        planes.sort((a, b) => a.importeTotsiniva - b.importeTotsiniva);

        setTarifas(planes);
      } catch (err) {
        setError("Error al cargar tarifas.");
        console.error(err);
      } finally {
        setLoading(false);
      }
    };
    cargarTarifas();
  }, [categorySelection]);

  const handleSelectPlan = (plan: DatosAvisoDto) => {
    const vehicleTypeId = categorySelection === 'EAUTOS' ? 1 : 2;
    const nombrePlanAmigable = plan.paquete === 1 ? 'PLAN DESTACADO' : 'PLAN ESTÁNDAR';

    setPlanSeleccionado({
      ...plan,
      idRubro: vehicleTypeId,
      nomavi: nombrePlanAmigable
    });
  };

  // Manejador centralizado de éxito
  const handleSuccess = (adId: number, isAdminAction: boolean = false) => {
    const status = isAdminAction ? 'admin_created' : 'approved';
    navigate(`/pago-confirmado?status=${status}&adId=${adId}`);
  };

  if (!user) {
    return (
      <div className="flex justify-center items-center py-20 min-h-[60vh]">
        <LoginModal onSuccess={(u) => setUser(u)} onClose={() => navigate('/')} />
      </div>
    );
  }

  // ELIMINADO: Bloque if (publicacionExitosa) { return ... }

  if (planSeleccionado) {
    return (
      <div className="max-w-6xl mx-auto py-8 px-6">
        <header className="flex justify-between items-center mb-10">
          <button onClick={() => setPlanSeleccionado(null)} className="text-gray-500 hover:text-white uppercase text-[10px] font-black tracking-widest flex items-center gap-2 transition-colors">
            ← Volver a Planes
          </button>
          <div className="glass px-4 py-2 rounded-xl text-xs border border-white/5">
            Publicando como: <span className="text-blue-400 font-bold">{user.username}</span>
          </div>
        </header>
        <FormularioAviso
          plan={planSeleccionado}
          onCancel={() => setPlanSeleccionado(null)}
          onSuccess={handleSuccess} // Usamos la redirección
          editId={editId ? parseInt(editId) : null}
        />
      </div>
    );
  }

  return (
    <div className="max-w-6xl mx-auto px-4 md:px-6 py-8 md:py-12">
      <header className="mb-8 md:mb-16 text-center md:text-left">
        <h2 className="text-3xl md:text-6xl font-black tracking-tighter uppercase mb-2">Comienza a <span className="text-gradient">Vender</span></h2>
        <p className="text-gray-500 text-sm md:text-lg italic">Selecciona una categoría para ver los planes de publicación.</p>
      </header>

      {/* SECCIÓN DE CATEGORÍA */}
      <section className="grid grid-cols-1 md:grid-cols-2 gap-4 md:gap-8 mb-10 md:mb-20 text-white">
        {TAREAS_DISPONIBLES.map(t => {
          // Lógica de bloqueo
          const isDisabled = fixedCategory && fixedCategory !== t.id;

          return (
            <button
              key={t.id}
              onClick={() => !isDisabled && setCategorySelection(t.id)}
              disabled={!!isDisabled} // Deshabilitar botón
              className={`
                    glass-card p-6 md:p-10 rounded-[2rem] md:rounded-[2.5rem] flex items-center justify-between group transition-all text-left
                    ${categorySelection === t.id ? 'border-blue-500 scale-[1.02] shadow-2xl shadow-blue-600/10 bg-white/5' : 'hover:bg-white/5'}
                    ${isDisabled ? 'opacity-30 cursor-not-allowed grayscale' : 'cursor-pointer'} 
                `}
            >
              <div>
                <span className="text-[10px] md:text-xs font-black uppercase tracking-widest text-blue-400 mb-1 md:mb-2 block">Categoría</span>
                <h3 className="text-2xl md:text-4xl font-bold mb-1 md:mb-2 uppercase tracking-tight">{t.label}</h3>
                <p className="text-gray-500 font-light text-xs md:text-sm">{t.description}</p>
              </div>
              <span className="text-4xl md:text-6xl group-hover:scale-110 transition-transform duration-300">{t.icon}</span>
            </button>
          );
        })}
      </section>

      {/* LISTA DE PLANES */}
      {categorySelection && (
        <section className="animate-fade-in-up">
          <div className="flex justify-between items-end mb-10 border-b border-white/5 pb-4">
            <div>
              <h3 className="text-3xl font-black uppercase tracking-tighter">Planes <span className="text-blue-400">Disponibles</span></h3>
              <p className="text-gray-500 text-xs mt-1 uppercase tracking-widest">Para {categorySelection === 'EAUTOS' ? 'Automóviles' : 'Motos'}</p>
            </div>
            <span className="text-gray-600 text-[10px] font-bold uppercase tracking-widest">Precios finales (IVA Incluido)</span>
          </div>

          {error && (
            <div className="bg-red-500/10 text-red-400 p-6 rounded-[2rem] border border-red-500/20 mb-10 text-center">
              <p className="font-bold uppercase tracking-widest text-xs mb-2">Error de Conexión</p>
              <p className="italic text-sm">{error}</p>
            </div>
          )}

          {loading ? (
            <div className="flex justify-center p-20"><div className="animate-spin rounded-full h-12 w-12 border-b-2 border-blue-500"></div></div>
          ) : (
            <div className="grid grid-cols-1 md:grid-cols-2 gap-8 max-w-4xl mx-auto">
              {tarifas.map((tarifa, idx) => {
                const precioRaw = tarifa.importeTotsiniva > 0
                  ? tarifa.importeTotsiniva * 1.105
                  : tarifa.importeSiniva * 1.105;
                const precioFinal = Math.round(precioRaw);
                const esDestacado = tarifa.paquete === 1;
                const tituloPlan = esDestacado ? "DESTACADO" : "ESTÁNDAR";
                const descripcionPlan = esDestacado
                  ? "Máxima visibilidad. Tu aviso aparecerá en el carrusel de inicio y primeros lugares de búsqueda."
                  : "Presencia esencial. Tu aviso aparecerá en el listado general de búsqueda.";

                return (
                  <div key={idx} onClick={() => handleSelectPlan(tarifa)}
                    className={`glass-card p-8 rounded-[2.5rem] flex flex-col group cursor-pointer relative overflow-hidden transition-all hover:-translate-y-2 hover:shadow-2xl ${esDestacado ? 'border-blue-500/30 hover:border-blue-500 hover:shadow-blue-900/20' : 'hover:border-white/30'}`}>

                    <div className={`absolute top-0 right-0 text-white text-[9px] font-black px-6 py-2 rounded-bl-3xl uppercase tracking-widest shadow-lg ${esDestacado ? 'bg-gradient-to-bl from-blue-600 to-cyan-500 animate-glow' : 'bg-white/10 text-gray-400'}`}>
                      {esDestacado ? 'RECOMENDADO' : 'BÁSICO'}
                    </div>

                    <h4 className={`text-3xl font-black uppercase tracking-tighter mb-4 mt-4 ${esDestacado ? 'text-blue-400' : 'text-white'}`}>
                      {tituloPlan}
                    </h4>

                    <div className="space-y-4 mb-10 flex-1">
                      <p className="text-gray-400 text-sm leading-relaxed border-b border-white/5 pb-4 min-h-[60px]">
                        {descripcionPlan}
                      </p>

                      <ul className="space-y-3">
                        <li className="flex justify-between text-xs text-gray-300 items-center">
                          <span className="text-gray-500 uppercase tracking-wider font-bold text-[10px]">Plataforma</span>
                          <span className="font-bold bg-white/5 px-2 py-1 rounded text-[10px]">SOLO WEB</span>
                        </li>
                        <li className="flex justify-between text-xs text-gray-300 items-center">
                          <span className="text-gray-500 uppercase tracking-wider font-bold text-[10px]">Duración</span>
                          <span className="font-bold">{tarifa.cantidadDias} Días</span>
                        </li>
                        <li className="flex justify-between text-xs text-gray-300 items-center">
                          <span className="text-gray-500 uppercase tracking-wider font-bold text-[10px]">Fotos</span>
                          <span className="font-bold text-green-400">Hasta 5</span>
                        </li>
                        <li className="flex justify-between text-xs text-gray-300 items-center">
                          <span className="text-gray-500 uppercase tracking-wider font-bold text-[10px]">Visibilidad</span>
                          <span className={`font-bold ${esDestacado ? 'text-blue-400' : 'text-gray-300'}`}>{esDestacado ? 'ALTA ⭐' : 'NORMAL'}</span>
                        </li>
                      </ul>
                    </div>

                    <div className="mt-auto pt-6 border-t border-white/5">
                      <span className="text-gray-500 text-[10px] font-black uppercase tracking-widest block mb-1">Precio Final</span>
                      <div className="flex items-baseline gap-1">
                        <span className="text-4xl font-black tracking-tighter text-white">
                          ${precioFinal.toLocaleString('es-AR', { minimumFractionDigits: 0, maximumFractionDigits: 0 })}
                        </span>
                        <span className="text-xs font-bold text-gray-500">ARS</span>
                      </div>
                      <button className={`w-full mt-6 text-white py-4 rounded-xl font-bold uppercase text-xs tracking-widest transition-all shadow-lg ${esDestacado ? 'bg-blue-600 hover:bg-blue-500 shadow-blue-600/20' : 'bg-white/5 hover:bg-white/10'}`}>
                        Seleccionar
                      </button>
                    </div>
                  </div>
                );
              })}
            </div>
          )}
        </section>
      )}
    </div>
  );
}