"use client";

import { DeadlineList } from "@/components/deadlines/DeadlineList";
import { DeadlineCalendarView } from "@/components/deadlines/DeadlineCalendarView";
import { useQuery } from "@tanstack/react-query";
import { api } from "@/lib/api";
import type { Deadline } from "@/lib/types";
import { Calendar, List, Calculator } from "lucide-react";
import Link from "next/link";
import { useState } from "react";

type ViewMode = "list" | "calendar";

export default function FristenPage() {
  const [view, setView] = useState<ViewMode>("list");

  const { data: deadlines } = useQuery({
    queryKey: ["deadlines"],
    queryFn: () => api.get<Deadline[]>("/api/deadlines"),
  });

  return (
    <div className="animate-fade-in space-y-4">
      <div className="flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between">
        <div>
          <h1 className="text-lg font-semibold text-neutral-900">Fristen</h1>
          <p className="mt-0.5 text-sm text-neutral-500">
            Alle Fristen im Überblick
          </p>
        </div>
        <div className="flex items-center gap-2">
          <Link
            href="/fristen/rechner"
            className="flex items-center gap-1.5 rounded-md border border-neutral-200 bg-white px-3 py-1.5 text-sm text-neutral-700 transition-colors hover:bg-neutral-50"
          >
            <Calculator className="h-3.5 w-3.5" />
            Fristenrechner
          </Link>
          <div className="flex rounded-md border border-neutral-200 bg-white">
            <button
              onClick={() => setView("list")}
              className={`flex items-center gap-1 rounded-l-md px-2.5 py-1.5 text-sm transition-colors ${
                view === "list"
                  ? "bg-neutral-100 font-medium text-neutral-900"
                  : "text-neutral-500 hover:text-neutral-700"
              }`}
            >
              <List className="h-3.5 w-3.5" />
              Liste
            </button>
            <button
              onClick={() => setView("calendar")}
              className={`flex items-center gap-1 rounded-r-md px-2.5 py-1.5 text-sm transition-colors ${
                view === "calendar"
                  ? "bg-neutral-100 font-medium text-neutral-900"
                  : "text-neutral-500 hover:text-neutral-700"
              }`}
            >
              <Calendar className="h-3.5 w-3.5" />
              Kalender
            </button>
          </div>
        </div>
      </div>

      {view === "list" ? (
        <DeadlineList />
      ) : (
        <DeadlineCalendarView deadlines={deadlines || []} />
      )}
    </div>
  );
}