"use client";

import { useActionState } from "react";
import { updateReferralSettingsAction } from "@/lib/actions/admin";
import type { SettingsDoc } from "@/models/Settings";

export function ReferralSettingsPanel({ referralSettings }: { referralSettings: SettingsDoc["referralSettings"] }) {
  const [state, formAction, pending] = useActionState(updateReferralSettingsAction, {});

  return (
    <form
      action={formAction}
      className="bg-[var(--rk-surface)] border border-white/10 rounded-2xl p-6 flex flex-col gap-4 max-w-2xl mb-8"
    >
      <p className="text-sm font-medium">Empfehlungsprogramm</p>
      <p className="text-xs text-[var(--rk-ink-muted)]">
        Jeder Kunde hat einen eigenen Empfehlungscode (im Konto sichtbar). Löst ein echter Neukunde ihn ein, bekommt
        er selbst einen Rabatt — und der Werber automatisch einen neuen, nur für ihn gültigen Rabattcode gutgeschrieben.
      </p>

      <label className="flex items-center gap-2 text-sm">
        <input type="checkbox" name="enabled" defaultChecked={referralSettings?.enabled ?? true} className="h-4 w-4" />
        Empfehlungsprogramm aktivieren
      </label>

      <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
        <div className="flex flex-col gap-1.5">
          <span className="text-xs text-[var(--rk-ink-muted)]">Rabatt für den geworbenen Neukunden</span>
          <div className="flex gap-2">
            <select
              name="refereeDiscountType"
              defaultValue={referralSettings?.refereeDiscountType ?? "percent"}
              className="bg-[var(--rk-bg)] border border-white/15 rounded-lg px-3 py-2 text-sm focus:outline-none focus:border-white/50"
            >
              <option value="percent">Prozent %</option>
              <option value="fixed">Fester Betrag €</option>
            </select>
            <input
              name="refereeDiscountValue"
              type="number"
              min="0"
              step="0.01"
              defaultValue={referralSettings?.refereeDiscountValue ?? 10}
              className="w-full bg-transparent border border-white/15 rounded-lg px-3 py-2 text-sm focus:outline-none focus:border-white/50"
            />
          </div>
        </div>
        <div className="flex flex-col gap-1.5">
          <span className="text-xs text-[var(--rk-ink-muted)]">Prämie für den Werber</span>
          <div className="flex gap-2">
            <select
              name="referrerRewardType"
              defaultValue={referralSettings?.referrerRewardType ?? "percent"}
              className="bg-[var(--rk-bg)] border border-white/15 rounded-lg px-3 py-2 text-sm focus:outline-none focus:border-white/50"
            >
              <option value="percent">Prozent %</option>
              <option value="fixed">Fester Betrag €</option>
            </select>
            <input
              name="referrerRewardValue"
              type="number"
              min="0"
              step="0.01"
              defaultValue={referralSettings?.referrerRewardValue ?? 10}
              className="w-full bg-transparent border border-white/15 rounded-lg px-3 py-2 text-sm focus:outline-none focus:border-white/50"
            />
          </div>
        </div>
      </div>

      <button
        type="submit"
        disabled={pending}
        className="self-start border border-white/30 rounded-lg px-4 py-2 text-xs uppercase tracking-[0.15em] hover:border-white disabled:opacity-50"
      >
        Speichern
      </button>
      {state.error && <p className="text-sm text-red-400">{state.error}</p>}
      {state.success && <p className="text-sm text-emerald-400">Gespeichert.</p>}
    </form>
  );
}