"use client";

import { useCallback, useMemo, useState } from "react";
import { AddPrototypeModal } from "@/components/AddPrototypeModal";
import { PrototypeCard } from "@/components/PrototypeCard";
import { ThemeToggle } from "@/components/ThemeToggle";
import { PrototypeSummary } from "@/lib/prototype";
import dayjs from "@/lib/dayjs"

interface PrototypeManagerPageProps {
  initialPrototypes: PrototypeSummary[];
}

export function PrototypeManagerPage({ initialPrototypes }: PrototypeManagerPageProps) {
  const [prototypes, setPrototypes] = useState<PrototypeSummary[]>(initialPrototypes);
  const [keyword, setKeyword] = useState("");

  const onCreated = useCallback((item: PrototypeSummary) => {
    setPrototypes((prev) => [item, ...prev.filter((current) => current.id !== item.id)]);
  }, []);

  const onDelete = useCallback(async (id: string) => {
    const confirmed = window.confirm("确定删除这个原型吗？删除后不可恢复。");
    if (!confirmed) {
      return;
    }

    const response = await fetch(`/api/prototypes/${encodeURIComponent(id)}`, {
      method: "DELETE",
    });

    if (!response.ok) {
      const payload = await response.json().catch(() => ({ error: "删除失败" }));
      throw new Error(payload.error || "删除失败");
    }

    setPrototypes((prev) => prev.filter((item) => item.id !== id));
  }, []);

  const filteredPrototypes = useMemo(() => {
    const query = keyword.trim().toLowerCase();

    if (!query) {
      return prototypes;
    }

    return prototypes.filter((item) => item.name.toLowerCase().includes(query));
  }, [keyword, prototypes]);

  const content = useMemo(() => {
    if (!prototypes.length) {
      return (
        <div className="rounded-xl border border-dashed border-slate-300 bg-white px-6 py-16 text-center dark:border-slate-700 dark:bg-slate-900">
          <p className="text-base text-slate-600 dark:text-slate-300">暂无原型，请点击右上角“添加原型”进行上传。</p>
        </div>
      );
    }

    if (!filteredPrototypes.length) {
      return (
        <div className="rounded-xl border border-dashed border-slate-300 bg-white px-6 py-16 text-center dark:border-slate-700 dark:bg-slate-900">
          <p className="text-base text-slate-600 dark:text-slate-300">
            未找到名称包含“{keyword}”的原型。
          </p>
        </div>
      );
    }

    return (
      <div className="grid grid-cols-1 gap-8 md:grid-cols-2 xl:grid-cols-3">
        {filteredPrototypes.map((item) => (
          <PrototypeCard
            key={item.id}
            prototype={item}
            onDelete={async (id) => {
              try {
                await onDelete(id);
              } catch (deleteError) {
                const message =
                  deleteError instanceof Error ? deleteError.message : "删除失败，请稍后重试";
                window.alert(message);
              }
            }}
          />
        ))}
      </div>
    );
  }, [filteredPrototypes, keyword, onDelete, prototypes]);

  return (
    <div className="min-h-screen bg-slate-50 text-slate-800 dark:bg-slate-950 dark:text-slate-100">
      <div className="mx-auto flex w-full max-w-6xl flex-col px-4 py-8 md:px-8 md:py-10">
        <header className="mb-10 flex flex-wrap items-end justify-between gap-4 border-b border-slate-200 pb-8 dark:border-slate-800">
          <div>
            <h1 className="text-4xl font-bold tracking-tight text-sky-600 dark:text-sky-400">原型导航</h1>
            <p className="mt-2 text-slate-600 dark:text-slate-300">Axure 原型集合 · Prototype Collection</p>
          </div>
          <AddPrototypeModal onCreated={onCreated} />
        </header>

        <main className="flex-1 space-y-6">
          <div className="flex flex-wrap items-center gap-3">
            <input
              type="text"
              value={keyword}
              onChange={(event) => setKeyword(event.target.value)}
              placeholder="根据名称筛选原型..."
              className="w-full max-w-md rounded-xl border border-slate-300 bg-white px-4 py-2.5 text-sm outline-none transition focus:ring-2 focus:ring-sky-200 dark:border-slate-700 dark:bg-slate-900 dark:text-slate-100"
            />
            {keyword ? (
              <button
                type="button"
                onClick={() => setKeyword("")}
                className="rounded-lg border border-slate-300 px-3 py-2 text-sm text-slate-700 transition hover:bg-slate-100 dark:border-slate-700 dark:text-slate-200 dark:hover:bg-slate-800"
              >
                清空
              </button>
            ) : null}
          </div>

          {content}
        </main>

        <footer className="mt-16 border-t border-slate-200 pt-8 text-center text-sm text-slate-500 dark:border-slate-800 dark:text-slate-400">
          &copy; {dayjs().format("YYYY")} 原型导航 | Powered by OnixByte
        </footer>
      </div>

      <ThemeToggle />
    </div>
  );
}