"use client";

import { useState, useEffect } from "react";
import { useRouter, useParams } from "next/navigation";
import Link from "next/link";

export default function EditBookingPage() {
  const router = useRouter();
  const params = useParams();
  const bookingId = params.id as string;

  const [loading, setLoading] = useState(true);
  const [saving, setSaving] = useState(false);
  const [error, setError] = useState("");
  const [equipmentList, setEquipmentList] = useState<any[]>([]);
  const [selectedEquipment, setSelectedEquipment] = useState<string[]>([]);
  const [formData, setFormData] = useState({
    customerName: "",
    customerEmail: "",
    customerPhone: "",
    customerAddress: "",
    customerCity: "",
    customerZip: "",
    companyName: "",
    invoiceType: "PRIVATE",
    model: "",
    eventDate: "",
    eventAddress: "",
    eventCity: "",
    eventZip: "",
    eventLocation: "",
    setupTimeStart: "",
    setupTimeLatest: "",
    dismantleTimeEarliest: "",
    dismantleTimeLatest: "",
    calculatedPrice: 0,
    notes: "",
    withPrintFlat: false,
  });

  const toggleEquipment = (id: string) => {
    setSelectedEquipment((prev) =>
      prev.includes(id) ? prev.filter((e) => e !== id) : [...prev, id]
    );
  };

  useEffect(() => {
    Promise.all([
      fetch(`/api/bookings/${bookingId}`).then((r) => r.json()),
      fetch("/api/equipment").then((r) => r.json()),
    ])
      .then(([bookingData, eqData]) => {
        const b = bookingData.booking || bookingData;
        setFormData({
          customerName: b.customerName || "",
          customerEmail: b.customerEmail || "",
          customerPhone: b.customerPhone || "",
          customerAddress: b.customerAddress || "",
          customerCity: b.customerCity || "",
          customerZip: b.customerZip || "",
          companyName: b.companyName || "",
          invoiceType: b.invoiceType || "PRIVATE",
          model: b.model || b.photobox?.model || "",
          eventDate: b.eventDate ? new Date(b.eventDate).toISOString().split("T")[0] : "",
          eventAddress: b.eventAddress || "",
          eventCity: b.eventCity || "",
          eventZip: b.eventZip || "",
          eventLocation: b.eventLocation || "",
          setupTimeStart: b.setupTimeStart ? new Date(b.setupTimeStart).toISOString().slice(0, 16) : "",
          setupTimeLatest: b.setupTimeLatest ? new Date(b.setupTimeLatest).toISOString().slice(0, 16) : "",
          dismantleTimeEarliest: b.dismantleTimeEarliest ? new Date(b.dismantleTimeEarliest).toISOString().slice(0, 16) : "",
          dismantleTimeLatest: b.dismantleTimeLatest ? new Date(b.dismantleTimeLatest).toISOString().slice(0, 16) : "",
          calculatedPrice: b.calculatedPrice || 0,
          notes: b.notes || "",
          withPrintFlat: b.withPrintFlat || false,
        });
        setEquipmentList(eqData.equipment || []);
        if (b.bookingEquipment) {
          setSelectedEquipment(b.bookingEquipment.map((be: any) => be.equipmentId));
        }
        setLoading(false);
      })
      .catch(() => {
        setError("Buchung konnte nicht geladen werden");
        setLoading(false);
      });
  }, [bookingId]);

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    setSaving(true);
    setError("");

    try {
      const res = await fetch(`/api/bookings/${bookingId}`, {
        method: "PATCH",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ ...formData, equipmentIds: selectedEquipment }),
      });

      const data = await res.json();

      if (!res.ok) {
        throw new Error(data.error || "Fehler beim Speichern");
      }

      router.push(`/dashboard/bookings/${bookingId}`);
    } catch (err: any) {
      setError(err.message);
      setSaving(false);
    }
  };

  if (loading) {
    return (
      <div className="min-h-screen bg-gradient-to-br from-gray-900 via-gray-800 to-gray-900 flex items-center justify-center">
        <div className="text-gray-400">Laden...</div>
      </div>
    );
  }

  const inputClass = "w-full px-4 py-2 bg-gray-700 border border-gray-600 text-white rounded-lg focus:ring-2 focus:ring-red-500 focus:border-transparent";

  return (
    <div className="min-h-screen bg-gradient-to-br from-gray-900 via-gray-800 to-gray-900 p-8">
      <div className="max-w-4xl mx-auto">
        <div className="mb-8">
          <Link
            href={`/dashboard/bookings/${bookingId}`}
            className="text-sm text-gray-400 hover:text-gray-300 mb-2 inline-block transition-colors"
          >
            &larr; Zurück zur Buchung
          </Link>
          <h2 className="text-3xl font-bold text-white">Buchung bearbeiten</h2>
        </div>

        <form
          onSubmit={handleSubmit}
          className="bg-gradient-to-br from-gray-800 to-gray-900 border border-gray-700 rounded-xl shadow-sm p-6 space-y-6"
        >
          <div>
            <h3 className="text-lg font-semibold text-white mb-4">Fotobox & Ausstattung</h3>
            <div className="grid grid-cols-2 gap-4">
              <div className="col-span-2">
                <label className="block text-sm font-medium text-gray-300 mb-2">Modell</label>
                <select
                  value={formData.model}
                  onChange={(e) => setFormData({ ...formData, model: e.target.value })}
                  className={inputClass}
                >
                  <option value="">Bitte wählen...</option>
                  <option value="VINTAGE">Vintage</option>
                  <option value="VINTAGE_SMILE">Vintage Smile</option>
                  <option value="VINTAGE_PHOTOS">Vintage Photos</option>
                  <option value="NOSTALGIE">Nostalgie</option>
                  <option value="MAGIC_MIRROR">Magic Mirror</option>
                </select>
              </div>
            </div>

            {equipmentList.length > 0 && (
              <div className="mt-4">
                <label className="block text-sm font-medium text-gray-300 mb-2">Zusatzausstattung</label>
                <div className="grid grid-cols-2 gap-2">
                  {equipmentList.map((eq) => (
                    <label
                      key={eq.id}
                      className={`flex items-center gap-2 p-3 rounded-lg border cursor-pointer transition-colors ${
                        selectedEquipment.includes(eq.id)
                          ? "bg-red-500/10 border-red-500/50 text-white"
                          : "bg-gray-700/50 border-gray-600 text-gray-300 hover:border-gray-500"
                      }`}
                    >
                      <input
                        type="checkbox"
                        checked={selectedEquipment.includes(eq.id)}
                        onChange={() => toggleEquipment(eq.id)}
                        className="accent-red-500"
                      />
                      {eq.name}
                    </label>
                  ))}
                </div>
              </div>
            )}
          </div>

          <div>
            <h3 className="text-lg font-semibold text-white mb-4">Kundendaten</h3>
            <div className="grid grid-cols-2 gap-4">
              <div className="col-span-2">
                <label className="block text-sm font-medium text-gray-300 mb-2">Rechnungsart</label>
                <div className="flex gap-4">
                  <label className="flex items-center text-white">
                    <input type="radio" value="PRIVATE" checked={formData.invoiceType === "PRIVATE"} onChange={(e) => setFormData({ ...formData, invoiceType: e.target.value })} className="mr-2" />
                    Privat
                  </label>
                  <label className="flex items-center text-white">
                    <input type="radio" value="BUSINESS" checked={formData.invoiceType === "BUSINESS"} onChange={(e) => setFormData({ ...formData, invoiceType: e.target.value })} className="mr-2" />
                    Geschäftlich
                  </label>
                </div>
              </div>
              {formData.invoiceType === "BUSINESS" && (
                <div className="col-span-2">
                  <label className="block text-sm font-medium text-gray-300 mb-2">Firmenname</label>
                  <input type="text" value={formData.companyName} onChange={(e) => setFormData({ ...formData, companyName: e.target.value })} className={inputClass} />
                </div>
              )}
              <div className="col-span-2">
                <label className="block text-sm font-medium text-gray-300 mb-2">Name</label>
                <input type="text" value={formData.customerName} onChange={(e) => setFormData({ ...formData, customerName: e.target.value })} required className={inputClass} />
              </div>
              <div>
                <label className="block text-sm font-medium text-gray-300 mb-2">E-Mail</label>
                <input type="email" value={formData.customerEmail} onChange={(e) => setFormData({ ...formData, customerEmail: e.target.value })} required className={inputClass} />
              </div>
              <div>
                <label className="block text-sm font-medium text-gray-300 mb-2">Telefon</label>
                <input type="tel" value={formData.customerPhone} onChange={(e) => setFormData({ ...formData, customerPhone: e.target.value })} required className={inputClass} />
              </div>
              <div className="col-span-2">
                <label className="block text-sm font-medium text-gray-300 mb-2">Adresse</label>
                <input type="text" value={formData.customerAddress} onChange={(e) => setFormData({ ...formData, customerAddress: e.target.value })} placeholder="Straße und Hausnummer" className={inputClass} />
              </div>
              <div>
                <label className="block text-sm font-medium text-gray-300 mb-2">PLZ</label>
                <input type="text" value={formData.customerZip} onChange={(e) => setFormData({ ...formData, customerZip: e.target.value })} className={inputClass} />
              </div>
              <div>
                <label className="block text-sm font-medium text-gray-300 mb-2">Stadt</label>
                <input type="text" value={formData.customerCity} onChange={(e) => setFormData({ ...formData, customerCity: e.target.value })} className={inputClass} />
              </div>
            </div>
          </div>

          <div>
            <h3 className="text-lg font-semibold text-white mb-4">Event-Details</h3>
            <div className="grid grid-cols-2 gap-4">
              <div>
                <label className="block text-sm font-medium text-gray-300 mb-2">Event-Datum</label>
                <input type="date" value={formData.eventDate} onChange={(e) => setFormData({ ...formData, eventDate: e.target.value })} required className={inputClass} />
              </div>
              <div>
                <label className="block text-sm font-medium text-gray-300 mb-2">Preis (EUR)</label>
                <input type="number" step="0.01" value={formData.calculatedPrice} onChange={(e) => setFormData({ ...formData, calculatedPrice: parseFloat(e.target.value) })} required className={inputClass} />
              </div>
              <div className="col-span-2">
                <label className="block text-sm font-medium text-gray-300 mb-2">Event-Adresse</label>
                <input type="text" value={formData.eventAddress} onChange={(e) => setFormData({ ...formData, eventAddress: e.target.value })} required className={inputClass} />
              </div>
              <div>
                <label className="block text-sm font-medium text-gray-300 mb-2">PLZ</label>
                <input type="text" value={formData.eventZip} onChange={(e) => setFormData({ ...formData, eventZip: e.target.value })} required className={inputClass} />
              </div>
              <div>
                <label className="block text-sm font-medium text-gray-300 mb-2">Stadt</label>
                <input type="text" value={formData.eventCity} onChange={(e) => setFormData({ ...formData, eventCity: e.target.value })} required className={inputClass} />
              </div>
              <div className="col-span-2">
                <label className="block text-sm font-medium text-gray-300 mb-2">Location-Name (optional)</label>
                <input type="text" value={formData.eventLocation} onChange={(e) => setFormData({ ...formData, eventLocation: e.target.value })} className={inputClass} />
              </div>
              <div>
                <label className="block text-sm font-medium text-gray-300 mb-2">Aufbau ab</label>
                <input type="datetime-local" value={formData.setupTimeStart} onChange={(e) => setFormData({ ...formData, setupTimeStart: e.target.value })} className={inputClass} />
              </div>
              <div>
                <label className="block text-sm font-medium text-gray-300 mb-2">Aufbau spätestens</label>
                <input type="datetime-local" value={formData.setupTimeLatest} onChange={(e) => setFormData({ ...formData, setupTimeLatest: e.target.value })} className={inputClass} />
              </div>
              <div>
                <label className="block text-sm font-medium text-gray-300 mb-2">Abbau ab</label>
                <input type="datetime-local" value={formData.dismantleTimeEarliest} onChange={(e) => setFormData({ ...formData, dismantleTimeEarliest: e.target.value })} className={inputClass} />
              </div>
              <div>
                <label className="block text-sm font-medium text-gray-300 mb-2">Abbau spätestens</label>
                <input type="datetime-local" value={formData.dismantleTimeLatest} onChange={(e) => setFormData({ ...formData, dismantleTimeLatest: e.target.value })} className={inputClass} />
              </div>
              <div className="col-span-2">
                <label className="flex items-center text-white gap-2">
                  <input type="checkbox" checked={formData.withPrintFlat} onChange={(e) => setFormData({ ...formData, withPrintFlat: e.target.checked })} />
                  Druckflatrate
                </label>
              </div>
              <div className="col-span-2">
                <label className="block text-sm font-medium text-gray-300 mb-2">Notizen</label>
                <textarea value={formData.notes} onChange={(e) => setFormData({ ...formData, notes: e.target.value })} rows={4} className={inputClass} />
              </div>
            </div>
          </div>

          {error && (
            <div className="bg-red-500/20 border border-red-500/50 text-red-400 px-4 py-3 rounded-lg">
              {error}
            </div>
          )}

          <div className="flex gap-4 pt-4 border-t border-gray-700">
            <Link href={`/dashboard/bookings/${bookingId}`} className="flex-1 px-4 py-3 bg-gray-700 text-gray-300 rounded-lg font-semibold text-center hover:bg-gray-600 transition-colors">
              Abbrechen
            </Link>
            <button type="submit" disabled={saving} className="flex-1 px-4 py-3 bg-gradient-to-r from-red-600 to-pink-600 text-white rounded-lg font-semibold hover:from-red-700 hover:to-pink-700 transition-all shadow-lg disabled:opacity-50">
              {saving ? "Wird gespeichert..." : "Änderungen speichern"}
            </button>
          </div>
        </form>
      </div>
    </div>
  );
}