"use client";

import { useState } from "react";
import Link from "next/link";
import { createClient } from "@/lib/supabase/client";
import { formatMessage } from "@/lib/i18n/shared";
import { useDict } from "@/components/i18n/LocaleProvider";
import LanguageSwitcher from "@/components/i18n/LanguageSwitcher";

export default function SuggestionForm() {
  const supabase = createClient();
  const dict = useDict();
  const [name, setName] = useState("");
  const [description, setDescription] = useState("");
  // Honeypot: für echte Nutzer unsichtbares Feld. Füllt ein Bot es aus,
  // tun wir so, als sei alles gut gegangen, ohne wirklich zu speichern.
  const [website, setWebsite] = useState("");
  const [error, setError] = useState<string | null>(null);
  const [success, setSuccess] = useState(false);
  const [busy, setBusy] = useState(false);

  async function submit(e: React.FormEvent) {
    e.preventDefault();
    setError(null);
    const trimmedName = name.trim();
    if (!trimmedName) {
      setError(dict.suggestions.nameRequired);
      return;
    }
    if (website.trim()) {
      // Bot-Falle ausgelöst: keine echte Anfrage, aber Erfolg vortäuschen.
      setSuccess(true);
      return;
    }
    setBusy(true);

    const { data: existing } = await supabase
      .from("dishes")
      .select("id")
      .ilike("name", trimmedName)
      .limit(1);
    if (existing && existing.length > 0) {
      setError(dict.suggestions.duplicate);
      setBusy(false);
      return;
    }

    const { error: insertError } = await supabase.from("dish_suggestions").insert({
      name: trimmedName,
      description: description.trim() || null,
    });
    if (insertError) {
      setError(formatMessage(dict.suggestions.genericError, { message: insertError.message }));
      setBusy(false);
      return;
    }
    setSuccess(true);
    setBusy(false);
  }

  return (
    <div className="flex-1 flex items-center justify-center p-4">
      <div className="card w-full max-w-md">
        <div className="flex justify-between items-center mb-1">
          <h1 className="text-xl font-bold text-[var(--c-primary)]">
            {dict.suggestions.formTitle}
          </h1>
          <LanguageSwitcher variant="light" />
        </div>
        <p className="text-sm text-gray-600 mb-4">{dict.suggestions.formHint}</p>

        {success ? (
          <p className="text-sm text-green-700">{dict.suggestions.success}</p>
        ) : (
          <form onSubmit={submit} className="space-y-3">
            <div>
              <label className="label" htmlFor="suggestion-name">
                {dict.suggestions.nameLabel}
              </label>
              <input
                id="suggestion-name"
                className="input"
                value={name}
                onChange={(e) => setName(e.target.value)}
                required
              />
            </div>
            <div>
              <label className="label" htmlFor="suggestion-description">
                {dict.suggestions.descriptionLabel}
              </label>
              <textarea
                id="suggestion-description"
                className="input"
                rows={3}
                value={description}
                onChange={(e) => setDescription(e.target.value)}
              />
            </div>
            {/* Honeypot – für Menschen unsichtbar, keine echten Nutzerdaten */}
            <div className="absolute -left-[9999px]" aria-hidden="true">
              <label htmlFor="website">Website</label>
              <input
                id="website"
                name="website"
                type="text"
                tabIndex={-1}
                autoComplete="off"
                value={website}
                onChange={(e) => setWebsite(e.target.value)}
              />
            </div>
            {error && (
              <p className="text-sm text-[var(--c-del)]" role="alert">
                {error}
              </p>
            )}
            <button type="submit" className="btn btn-primary w-full" disabled={busy}>
              {busy ? dict.suggestions.submitting : dict.suggestions.submit}
            </button>
          </form>
        )}

        <p className="mt-4 text-center text-sm">
          <Link href="/" className="text-gray-500 hover:text-[var(--c-primary)]">
            {dict.suggestions.backToMenu}
          </Link>
        </p>
      </div>
    </div>
  );
}