"use client";

import { Copy, FolderPlus, Search } from "lucide-react";
import { useEffect, useState } from "react";
import { useQuery } from "@tanstack/react-query";
import { App, Button, Card, Drawer, Empty, Image, Input, Pagination, Spin, Tag, Typography } from "antd";
import axios from "axios";
import copy from "copy-to-clipboard";

import { cn } from "@/lib/utils";
import { useAssetStore } from "@/stores/use-asset-store";
import { fetchAssetLibrary, type AssetLibraryItem } from "@/services/api/assets";
import { uploadImage } from "@/services/image-storage";

const PAGE_SIZE = 12;

export default function AssetLibraryPage() {
  const { message } = App.useApp();
  const [keyword, setKeyword] = useState("");
  const [selectedType, setSelectedType] = useState("");
  const [selectedTags, setSelectedTags] = useState<string[]>([]);
  const [page, setPage] = useState(1);
  const [selectedAsset, setSelectedAsset] = useState<AssetLibraryItem | null>(null);
  const addAsset = useAssetStore((state) => state.addAsset);

  const query = useQuery({
    queryKey: ["asset-library", keyword, selectedType, selectedTags, page],
    queryFn: () => fetchAssetLibrary({ keyword, type: selectedType, tag: selectedTags, page, pageSize: PAGE_SIZE }),
    retry: false,
  });

  useEffect(() => {
    if (query.isError) {
      message.error(query.error instanceof Error ? query.error.message : "获取素材库失败");
    }
  }, [message, query.error, query.isError]);

  const isReady = query.isFetched || query.isError;
  const items = query.data?.items || [];
  const availableTags = query.data?.tags || [];
  const total = query.data?.total || 0;

  const toggleTag = (tag: string) => {
    setSelectedTags((items) => items.includes(tag) ? items.filter((item) => item !== tag) : [...items, tag]);
  };

  const saveToMyAssets = async (asset: AssetLibraryItem) => {
    try {
      if (asset.type === "image") {
        const dataUrl = await remoteImageToDataUrl(asset.url);
        const image = await uploadImage(dataUrl);
        addAsset({
          kind: "image",
          title: asset.title,
          coverUrl: asset.coverUrl,
          tags: asset.tags,
          source: asset.category,
          note: asset.description,
          data: { dataUrl: image.url, storageKey: image.storageKey, width: image.width, height: image.height, bytes: image.bytes, mimeType: image.mimeType },
          metadata: { source: "asset-library", assetId: asset.id },
        });
      } else {
        addAsset({
          kind: "text",
          title: asset.title,
          coverUrl: asset.coverUrl,
          tags: asset.tags,
          source: asset.category,
          note: asset.description,
          data: { content: asset.content },
          metadata: { source: "asset-library", assetId: asset.id },
        });
      }
      message.success("已加入我的素材");
    } catch {
      message.error("加入失败");
    }
  };

  const copyText = async (value: string) => {
    copy(value);
    message.success("已复制");
  };

  if (!isReady) {
    return (
      <div className="flex h-full items-center justify-center">
        <Spin />
      </div>
    );
  }

  return (
    <div className="flex h-full flex-col overflow-hidden bg-background text-stone-800 dark:text-stone-100">
      <main className="min-h-0 flex-1 overflow-y-auto bg-background bg-[radial-gradient(#e5e7eb_1px,transparent_1px)] px-6 py-8 [background-size:16px_16px] dark:bg-[radial-gradient(rgba(245,245,244,.16)_1px,transparent_1px)]">
        <div className="pb-8">
          <div className="mx-auto max-w-5xl text-center">
            <h1 className="text-4xl font-semibold tracking-tight text-stone-950 dark:text-stone-100">素材库</h1>
            <p className="mt-3 text-sm text-stone-500 dark:text-stone-400">挑选团队素材，加入我的素材后继续编辑和使用。</p>
          </div>
          <div className="mx-auto mt-8 w-full max-w-2xl">
            <Input size="large" className="w-full" prefix={<Search className="size-4 text-stone-400" />} value={keyword} placeholder="按标题查询" onChange={(event) => { setPage(1); setKeyword(event.target.value); }} />
          </div>
          <div className="mx-auto mt-6 max-w-6xl space-y-3">
            <div className="grid gap-2 sm:grid-cols-[56px_minmax(0,1fr)] sm:items-start">
              <div className="pt-2 text-xs font-medium text-stone-500 dark:text-stone-400">类型</div>
              <div className="flex flex-wrap gap-2">
                {[
                  { label: "全部", value: "" },
                  { label: "文本", value: "text" },
                  { label: "图片", value: "image" },
                ].map((item) => (
                  <Tag.CheckableTag key={item.value || "all"} checked={selectedType === item.value} className={cn("prompt-filter-tag", selectedType === item.value && "is-active")} onChange={() => { setPage(1); setSelectedType(item.value); }}>
                    {item.label}
                  </Tag.CheckableTag>
                ))}
              </div>
            </div>
            <div className="grid gap-2 sm:grid-cols-[56px_minmax(0,1fr)] sm:items-start">
              <div className="pt-2 text-xs font-medium text-stone-500 dark:text-stone-400">标签</div>
              <div className="flex flex-wrap gap-2">
                <Tag.CheckableTag checked={selectedTags.length === 0} className={cn("prompt-filter-tag", selectedTags.length === 0 && "is-active")} onChange={() => { setPage(1); setSelectedTags([]); }}>
                  全部
                </Tag.CheckableTag>
                {availableTags.map((tag) => (
                  <Tag.CheckableTag key={tag} checked={selectedTags.includes(tag)} className={cn("prompt-filter-tag", selectedTags.includes(tag) && "is-active")} onChange={() => { setPage(1); toggleTag(tag); }}>
                    {tag}
                  </Tag.CheckableTag>
                ))}
              </div>
            </div>
          </div>
        </div>

        <div className="mx-auto flex max-w-7xl flex-col gap-5">
          <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-4 2xl:grid-cols-5">
            {items.map((asset) => (
              <LibraryCard key={asset.id} asset={asset} onOpen={() => setSelectedAsset(asset)} onAdd={() => void saveToMyAssets(asset)} />
            ))}
          </div>

          {!items.length ? <Empty image={Empty.PRESENTED_IMAGE_SIMPLE} description="没有找到素材" className="py-20" /> : null}

          <div className="flex justify-center">
            <Pagination current={page} pageSize={PAGE_SIZE} total={total} showSizeChanger={false} onChange={(nextPage) => setPage(nextPage)} />
          </div>
        </div>
      </main>

      <Drawer title="素材详情" open={Boolean(selectedAsset)} size="large" onClose={() => setSelectedAsset(null)}>
        {selectedAsset ? (
          <div className="space-y-5">
            {selectedAsset.coverUrl ? <Image src={selectedAsset.coverUrl} alt={selectedAsset.title} className="rounded-lg" /> : <div className="rounded-lg border border-stone-200 bg-stone-50 p-5 text-sm leading-6 text-stone-600 dark:border-stone-800 dark:bg-stone-900 dark:text-stone-300">{selectedAsset.content || "暂无封面"}</div>}
            <div>
              <Typography.Title level={4} className="!mb-2">{selectedAsset.title}</Typography.Title>
              <div className="flex flex-wrap gap-1.5">
                <Tag>{selectedAsset.type === "image" ? "图片" : "文本"}</Tag>
                {selectedAsset.tags.map((tag) => <Tag key={tag}>{tag}</Tag>)}
              </div>
            </div>
            <div className="rounded-lg border border-stone-200 p-4 dark:border-stone-800">
              <Typography.Text type="secondary" className="block text-xs">内容</Typography.Text>
              {selectedAsset.type === "text" ? <Typography.Paragraph className="mt-2 whitespace-pre-wrap">{selectedAsset.content}</Typography.Paragraph> : <Typography.Text className="mt-2 block">{selectedAsset.url}</Typography.Text>}
            </div>
            {selectedAsset.description ? <Typography.Paragraph type="secondary">{selectedAsset.description}</Typography.Paragraph> : null}
            <div className="flex flex-wrap gap-2">
              {selectedAsset.type === "text" ? <Button type="primary" icon={<Copy className="size-4" />} onClick={() => void copyText(selectedAsset.content)}>复制文本</Button> : null}
              {selectedAsset.type === "image" ? <Button type="primary" icon={<Copy className="size-4" />} onClick={() => void copyText(selectedAsset.url)}>复制链接</Button> : null}
              <Button icon={<FolderPlus className="size-4" />} onClick={() => void saveToMyAssets(selectedAsset)}>加入我的素材</Button>
            </div>
          </div>
        ) : null}
      </Drawer>
    </div>
  );
}

function LibraryCard({ asset, onOpen, onAdd }: { asset: AssetLibraryItem; onOpen: () => void; onAdd: () => void }) {
  const cover = asset.coverUrl;
  return (
    <Card hoverable className="overflow-hidden" styles={{ body: { padding: 0 } }} cover={<button type="button" className="block w-full text-left" onClick={onOpen}>{cover ? <img src={cover} alt={asset.title} className="aspect-[4/3] w-full object-cover" /> : <div className="flex aspect-[4/3] items-center justify-center bg-stone-100 p-5 text-center text-sm leading-6 text-stone-600 dark:bg-stone-900 dark:text-stone-300">{asset.content || "暂无封面"}</div>}</button>}>
      <button type="button" className="block w-full text-left" onClick={onOpen}>
        <div className="p-4">
          <div className="flex items-start justify-between gap-3">
            <h2 className="line-clamp-1 text-sm font-semibold text-stone-950 dark:text-stone-100">{asset.title}</h2>
            <Tag className="m-0 shrink-0 text-[11px]">{asset.type === "image" ? "图片" : "文本"}</Tag>
          </div>
          <Typography.Paragraph type="secondary" ellipsis={{ rows: 3 }} className="!mb-0 !mt-2 !text-xs !leading-5">
            {asset.type === "text" ? asset.content : asset.url}
          </Typography.Paragraph>
          <div className="mt-3 flex flex-wrap gap-1.5">
            {asset.tags.slice(0, 3).map((tag) => <Tag key={tag} className="m-0 text-[11px]">{tag}</Tag>)}
            {!asset.tags.length ? <Tag className="m-0 text-[11px]">无标签</Tag> : null}
          </div>
        </div>
      </button>
      <div className="flex items-center gap-2 px-4 pb-4">
        <Button size="small" onClick={onOpen}>查看</Button>
        <Button size="small" icon={<FolderPlus className="size-3.5" />} onClick={onAdd}>加入我的素材</Button>
      </div>
    </Card>
  );
}

async function remoteImageToDataUrl(url: string) {
  const response = await axios.get(url, { responseType: "blob" });
  const blob = response.data as Blob;
  return await blobToDataUrl(blob);
}

function blobToDataUrl(blob: Blob) {
  return new Promise<string>((resolve, reject) => {
    const reader = new FileReader();
    reader.onload = () => resolve(String(reader.result || ""));
    reader.onerror = () => reject(new Error("读取图片失败"));
    reader.readAsDataURL(blob);
  });
}