import { CloudUpload, Download, FileCode2, Search } from "lucide-solid";
import { createMemo, For, Show } from "solid-js";
import { EmptyState } from "../../components/feedback/empty-state";
import { Page } from "../../components/layout/page";
import { PageHeading } from "../../components/layout/page-heading";
import { Button, IconLink } from "../../components/ui/button";
import { Card, CardHeader } from "../../components/ui/card";
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from "../../components/ui/table";
import { witPackageDownloadUrl } from "../../lib/api";
import type { PageProps } from "../types";

export default function WitPackagesPage(props: PageProps) {
  const packages = createMemo(() => {
    const state = props.state();
    const query = state?.query.trim().toLowerCase() ?? "";
    return (
      state?.snapshot?.witPackages.filter(
        (item) =>
          !query ||
          item.name.toLowerCase().includes(query) ||
          item.version.toLowerCase().includes(query) ||
          item.sha256.toLowerCase().includes(query),
      ) ?? []
    );
  });

  return (
    <Page>
      <PageHeading
        eyebrow="INTERFACES"
        title="WIT 包"
        description="管理不可变、版本化的 Component 接口依赖。"
        actions={
          <Button variant="primary" onClick={() => props.command({ type: "open-wit-publish" })}>
            <CloudUpload size={16} />
            发布 WIT 包
          </Button>
        }
      />
      <Card as="section">
        <CardHeader>
          <div>
            <h2>Registry</h2>
            <p>{packages().length} 个匹配包版本</p>
          </div>
        </CardHeader>
        <Show
          when={packages().length > 0}
          fallback={
            <EmptyState icon={Search} title="没有匹配的 WIT 包" detail="发布或调整搜索关键词。" />
          }
        >
          <Table>
            <TableHeader>
              <TableRow>
                <TableHead>包</TableHead>
                <TableHead>版本</TableHead>
                <TableHead>直接依赖</TableHead>
                <TableHead>SHA-256</TableHead>
                <TableHead>
                  <span class="sr-only">下载</span>
                </TableHead>
              </TableRow>
            </TableHeader>
            <TableBody>
              <For each={packages()}>
                {(item) => (
                  <TableRow>
                    <TableCell>
                      <span class="flex items-center gap-2">
                        <FileCode2 size={15} class="text-cyan-strong" />
                        <strong>{item.name}</strong>
                      </span>
                    </TableCell>
                    <TableCell class="font-mono text-xs">{item.version}</TableCell>
                    <TableCell class="text-xs text-muted">
                      {item.dependencies.length
                        ? item.dependencies
                            .map((dependency) => `${dependency.name}@${dependency.version}`)
                            .join(", ")
                        : "无"}
                    </TableCell>
                    <TableCell
                      class="max-w-64 truncate font-mono text-xs text-muted"
                      title={item.sha256}
                    >
                      {item.sha256}
                    </TableCell>
                    <TableCell class="text-right">
                      <IconLink
                        aria-label={`下载 ${item.name}@${item.version}`}
                        title="下载"
                        href={witPackageDownloadUrl(props.state()?.apiBase ?? "", item)}
                      >
                        <Download size={15} />
                      </IconLink>
                    </TableCell>
                  </TableRow>
                )}
              </For>
            </TableBody>
          </Table>
        </Show>
      </Card>
    </Page>
  );
}