"use client";

import React, { useState } from 'react';
import { useForm } from 'react-hook-form';
import { zodResolver } from '@hookform/resolvers/zod';
import { z } from 'zod';
import { Loader2, CheckCircle2, AlertCircle } from 'lucide-react';
import { submitContactForm } from '@/app/kontakt/actions';

const contactFormSchema = z.object({
  name: z.string().min(2, "Imię musi mieć min. 2 znaki"),
  phone: z.string().min(9, "Wprowadź poprawny numer telefonu"),
  email: z.string().email("Niepoprawny adres e-mail"),
  subject: z.string().min(1, "Wybierz temat"),
  message: z.string().min(10, "Wiadomość musi mieć min. 10 znaków"),
  consent: z.boolean().refine((val) => val === true, "Zgoda RODO jest wymagana"),
});

type ContactFormValues = z.infer<typeof contactFormSchema>;

export function ContactForm() {
  const [serverState, setServerState] = useState<{ success?: boolean; message?: string } | null>(null);

  const {
    register,
    handleSubmit,
    formState: { errors, isSubmitting },
    reset
  } = useForm<ContactFormValues>({
    resolver: zodResolver(contactFormSchema),
    defaultValues: {
      name: '',
      phone: '',
      email: '',
      subject: '',
      message: '',
      consent: false,
    }
  });

  const onSubmit = async (data: ContactFormValues) => {
    setServerState(null);
    
    // Przekształcamy dane do formatu FormData dla Server Action
    const formData = new FormData();
    Object.entries(data).forEach(([key, value]) => {
      formData.append(key, value.toString());
    });

    const response = await submitContactForm(null, formData);
    
    setServerState({
      success: response.success,
      message: response.message
    });

    if (response.success) {
      reset();
    }
  };

  if (serverState?.success) {
    return (
      <div className="bg-green-50 text-green-800 p-8 rounded-2xl border border-green-200 flex flex-col items-center text-center">
        <CheckCircle2 className="w-16 h-16 text-green-500 mb-4" />
        <h3 className="text-2xl font-bold font-heading mb-2">Wiadomość wysłana!</h3>
        <p className="text-green-700">{serverState.message}</p>
        <button 
          onClick={() => setServerState(null)}
          className="mt-6 px-6 py-2 bg-green-600 text-white rounded-lg font-semibold hover:bg-green-700 transition-colors"
        >
          Wyślij kolejną wiadomość
        </button>
      </div>
    );
  }

  return (
    <form onSubmit={handleSubmit(onSubmit)} className="space-y-6 bg-white p-6 md:p-8 rounded-2xl border border-border shadow-sm">
      {serverState && !serverState.success && (
        <div className="bg-red-50 text-red-800 p-4 rounded-xl border border-red-200 flex items-start gap-3">
          <AlertCircle className="w-5 h-5 shrink-0 mt-0.5" />
          <p className="text-sm font-medium">{serverState.message}</p>
        </div>
      )}

      <div className="grid grid-cols-1 sm:grid-cols-2 gap-6">
        {/* Imię */}
        <div className="space-y-2">
          <label htmlFor="name" className="text-sm font-semibold text-primary">Imię i nazwisko</label>
          <input
            {...register("name")}
            id="name"
            className={`w-full px-4 py-3 rounded-xl border ${errors.name ? 'border-red-500 focus:ring-red-500' : 'border-border focus:border-primary focus:ring-primary/20'} outline-none focus:ring-2 transition-all bg-slate-50`}
            placeholder="Jan Kowalski"
            aria-invalid={errors.name ? "true" : "false"}
          />
          {errors.name && <p className="text-red-500 text-xs font-medium">{errors.name.message}</p>}
        </div>

        {/* Telefon */}
        <div className="space-y-2">
          <label htmlFor="phone" className="text-sm font-semibold text-primary">Telefon</label>
          <input
            {...register("phone")}
            id="phone"
            type="tel"
            className={`w-full px-4 py-3 rounded-xl border ${errors.phone ? 'border-red-500 focus:ring-red-500' : 'border-border focus:border-primary focus:ring-primary/20'} outline-none focus:ring-2 transition-all bg-slate-50`}
            placeholder="+48 123 456 789"
          />
          {errors.phone && <p className="text-red-500 text-xs font-medium">{errors.phone.message}</p>}
        </div>
      </div>

      <div className="grid grid-cols-1 sm:grid-cols-2 gap-6">
        {/* Email */}
        <div className="space-y-2">
          <label htmlFor="email" className="text-sm font-semibold text-primary">Adres e-mail</label>
          <input
            {...register("email")}
            id="email"
            type="email"
            className={`w-full px-4 py-3 rounded-xl border ${errors.email ? 'border-red-500 focus:ring-red-500' : 'border-border focus:border-primary focus:ring-primary/20'} outline-none focus:ring-2 transition-all bg-slate-50`}
            placeholder="jan@example.com"
          />
          {errors.email && <p className="text-red-500 text-xs font-medium">{errors.email.message}</p>}
        </div>

        {/* Temat */}
        <div className="space-y-2">
          <label htmlFor="subject" className="text-sm font-semibold text-primary">Temat rozmowy</label>
          <select
            {...register("subject")}
            id="subject"
            className={`w-full px-4 py-3 rounded-xl border ${errors.subject ? 'border-red-500 focus:ring-red-500' : 'border-border focus:border-primary focus:ring-primary/20'} outline-none focus:ring-2 transition-all bg-slate-50 appearance-none`}
          >
            <option value="">Wybierz temat...</option>
            <option value="klimatyzacja">Klimatyzacja</option>
            <option value="pompy-ciepla">Pompy ciepła</option>
            <option value="remonty">Remonty i wykończenia</option>
            <option value="hydraulika">Hydraulika</option>
            <option value="serwis-agd">Serwis AGD</option>
            <option value="inne">Inne zapytanie</option>
          </select>
          {errors.subject && <p className="text-red-500 text-xs font-medium">{errors.subject.message}</p>}
        </div>
      </div>

      {/* Wiadomość */}
      <div className="space-y-2">
        <label htmlFor="message" className="text-sm font-semibold text-primary">Wiadomość</label>
        <textarea
          {...register("message")}
          id="message"
          rows={5}
          className={`w-full px-4 py-3 rounded-xl border ${errors.message ? 'border-red-500 focus:ring-red-500' : 'border-border focus:border-primary focus:ring-primary/20'} outline-none focus:ring-2 transition-all bg-slate-50 resize-y`}
          placeholder="Opisz krótko, w czym możemy Ci pomóc..."
        />
        {errors.message && <p className="text-red-500 text-xs font-medium">{errors.message.message}</p>}
      </div>

      {/* RODO */}
      <div className="space-y-2">
        <label className="flex items-start gap-3 cursor-pointer group">
          <div className="relative flex items-start pt-1">
            <input
              type="checkbox"
              {...register("consent")}
              className="w-5 h-5 rounded border-border text-primary focus:ring-primary focus:ring-offset-0 transition-colors"
            />
          </div>
          <span className="text-xs text-text-muted leading-relaxed select-none">
            Wyrażam zgodę na przetwarzanie moich danych osobowych podanych w formularzu w celu obsługi zapytania przez firmę AeroService. Zapoznałem/am się z Polityką Prywatności.
          </span>
        </label>
        {errors.consent && <p className="text-red-500 text-xs font-medium">{errors.consent.message}</p>}
      </div>

      {/* Button */}
      <button
        type="submit"
        disabled={isSubmitting}
        className="w-full bg-cta hover:bg-cta-hover text-white font-bold py-4 rounded-xl transition-colors flex items-center justify-center gap-2 disabled:opacity-70 disabled:cursor-not-allowed shadow-md"
      >
        {isSubmitting ? (
          <>
            <Loader2 className="w-5 h-5 animate-spin" />
            <span>Wysyłanie...</span>
          </>
        ) : (
          <span>Wyślij zapytanie</span>
        )}
      </button>
    </form>
  );
}