"use client";

import React, { useMemo, useState } from "react";
import { useConsent, type ConsentState } from "./ConsentProvider";

export default function ConsentBanner() {
  const { consent, setConsent } = useConsent();
  const [draft, setDraft] = useState<ConsentState>({ analytics: false, chat: false });
  const [minimized, setMinimized] = useState(false);

  const locale = useMemo(() => {
    if (typeof document === "undefined") return "en";
    const match = document.cookie
      .split(";")
      .map((c) => c.trim())
      .find((c) => c.startsWith("NEXT_LOCALE="));
    if (!match) return "en";
    return decodeURIComponent(match.split("=").slice(1).join("=")) || "en";
  }, []);

  const shouldShow = consent === null;
  if (!shouldShow) return null;

  const s = locale === "de"
    ? {
        title: "Datenschutz-Einstellungen",
        description:
          "Wir nutzen optionale Dienste (Analytics und Chat), um die Seite zu verbessern. Du kannst deine Auswahl jederzeit ändern.",
        essential: "Essentiell",
        analytics: "Analytics",
        chat: "Chatbot",
        acceptAll: "Alles akzeptieren",
        acceptSelected: "Auswahl akzeptieren",
        rejectAll: "Alles ablehnen",
      }
    : {
        title: "Privacy settings",
        description:
          "We use optional services (analytics and chat) to improve the site. You can change your choice anytime.",
        essential: "Essential",
        analytics: "Analytics",
        chat: "Chatbot",
        acceptAll: "Accept all",
        acceptSelected: "Accept selected",
        rejectAll: "Reject all",
      };

  if (minimized) {
    return (
      <div className="fixed bottom-4 right-4 z-[60]">
        <button
          type="button"
          onClick={() => setMinimized(false)}
          className="px-4 py-2 rounded-full bg-white/80 backdrop-blur-xl border border-white/60 shadow-lg text-stone-800 font-semibold hover:bg-white transition-colors"
          aria-label="Open privacy settings"
        >
          {s.title}
        </button>
      </div>
    );
  }

  return (
    <div className="fixed bottom-4 right-4 z-[60] max-w-[calc(100vw-2rem)]">
      <div className="w-[360px] max-w-full bg-white/85 backdrop-blur-xl border border-white/60 rounded-2xl shadow-[0_12px_40px_rgba(41,37,36,0.14)] p-4">
        <div className="flex items-start justify-between gap-3">
          <div className="min-w-0">
            <div className="text-base font-bold text-stone-900">{s.title}</div>
            <p className="text-xs text-stone-600 mt-1 leading-snug">{s.description}</p>
          </div>
          <button
            type="button"
            onClick={() => setMinimized(true)}
            className="shrink-0 text-xs text-stone-500 hover:text-stone-900 transition-colors"
            aria-label="Minimize privacy banner"
            title="Minimize"
          >
            Hide
          </button>
        </div>

        <div className="mt-3 space-y-2">
          <div className="flex items-center justify-between gap-3">
            <div className="text-xs font-semibold text-stone-800">{s.essential}</div>
            <div className="text-[11px] text-stone-500">Always on</div>
          </div>

          <label className="flex items-center justify-between gap-3 py-1">
            <span className="text-sm font-semibold text-stone-800">{s.analytics}</span>
            <input
              type="checkbox"
              checked={draft.analytics}
              onChange={(e) => setDraft((p) => ({ ...p, analytics: e.target.checked }))}
              className="w-4 h-4 accent-stone-900"
            />
          </label>

          <label className="flex items-center justify-between gap-3 py-1">
            <span className="text-sm font-semibold text-stone-800">{s.chat}</span>
            <input
              type="checkbox"
              checked={draft.chat}
              onChange={(e) => setDraft((p) => ({ ...p, chat: e.target.checked }))}
              className="w-4 h-4 accent-stone-900"
            />
          </label>
        </div>

        <div className="mt-3 flex flex-col gap-2">
          <button
            onClick={() => setConsent({ analytics: true, chat: true })}
            className="px-4 py-2 rounded-xl bg-stone-900 text-stone-50 font-semibold hover:bg-stone-800 transition-colors"
          >
            {s.acceptAll}
          </button>
          <button
            onClick={() => setConsent(draft)}
            className="px-4 py-2 rounded-xl bg-white border border-stone-200 text-stone-800 font-semibold hover:bg-stone-50 transition-colors"
          >
            {s.acceptSelected}
          </button>
          <button
            onClick={() => setConsent({ analytics: false, chat: false })}
            className="px-4 py-2 rounded-xl bg-transparent text-stone-600 font-semibold hover:text-stone-900 transition-colors"
          >
            {s.rejectAll}
          </button>
        </div>
      </div>
    </div>
  );
}