import { useQuery } from '@tanstack/react-query';
import { Download, Loader2, Smartphone } from 'lucide-react';
import { useClient } from 'hooks/useClient';
import type { KioskApp, KioskBuild } from '../db/types';

/*
  The install list. This is the page that has to work on a phone in mobile Safari — see `layout.ts` for why
  it is first in a horizontal root.

  Deliberately plain: rows and a button. Somebody is holding a phone, and the whole content is "which apps
  exist and which one do I want".
*/

const prettyVersion = (v: string) =>
  v.length === 10 ? `${v.slice(0, 4)}.${v.slice(4, 6)}.${v.slice(6, 8)}.${v.slice(8)}` : v;

const mb = (bytes: number) => `${(bytes / 1024 / 1024).toFixed(1)} MB`;

const InstallButton = ({ build }: { build: KioskBuild }) => {
  const client = useClient();

  // The link is fetched at the moment of the tap, never rendered ahead of time: it embeds the caller's key,
  // and the key is re-read on demand precisely so rotating one costs nothing.
  const install = async () => {
    const { url } = await client.get<{ url: string; kind: 'itms' | 'apk' }>(
      `/kiosk/install/${encodeURIComponent(build.appName)}/${build.platform}/${encodeURIComponent(build.version)}`,
    );
    // `itms-services://` is handed to the OS, which takes over from here. There is no completion callback —
    // the app reports its own installs afterwards.
    window.location.href = url;
  };

  return (
    <button
      type="button"
      onClick={() => void install()}
      className="flex shrink-0 cursor-pointer items-center gap-1.5 rounded-md bg-primary px-3 py-1.5 text-xs font-medium text-primary-foreground transition-opacity hover:opacity-90"
    >
      <Download className="h-3.5 w-3.5" />
      Install
    </button>
  );
};

const BuildRow = ({ build }: { build: KioskBuild }) => (
  <div className="flex items-center gap-3 border-b border-border/60 px-4 py-3">
    <div className="min-w-0 flex-1">
      <div className="truncate text-sm font-medium">{build.displayName}</div>
      <div className="mt-0.5 flex flex-wrap items-center gap-x-2 gap-y-1 text-[11px] text-muted-foreground">
        <span className="rounded bg-muted px-1.5 py-0.5 font-medium uppercase">{build.platform}</span>
        <span className="tabular-nums">{prettyVersion(build.version)}</span>
        <span>{build.shortVersion}</span>
        <span>{mb(build.sizeBytes)}</span>
        {build.signing ? <span>{build.signing}</span> : null}
        {/* The date the app stops launching. Absent for an unsigned build, which has no profile. */}
        {build.profileExpiresAt ? (
          <span title="The provisioning profile expires — the app stops launching then">
            expires {new Date(build.profileExpiresAt).toISOString().slice(0, 10)}
          </span>
        ) : null}
      </div>
    </div>
    <InstallButton build={build} />
  </div>
);

export const AppsPanel = () => {
  const client = useClient();
  const { data, isLoading } = useQuery({
    queryKey: ['kiosk', 'apps'],
    queryFn: () => client.get<{ apps: KioskApp[] }>('/kiosk/apps'),
  });

  if (isLoading) {
    return (
      <div className="flex h-full items-center justify-center text-muted-foreground">
        <Loader2 className="h-4 w-4 animate-spin" />
      </div>
    );
  }

  const apps = data?.apps ?? [];
  if (!apps.length) {
    return (
      <div className="flex h-full flex-col items-center justify-center gap-2 px-6 text-center text-sm text-muted-foreground">
        <Smartphone className="h-8 w-8" />
        <span>No builds published yet.</span>
        <span className="text-xs">Builds are published from the machine that signs them.</span>
      </div>
    );
  }

  return (
    <div className="h-full overflow-y-auto">
      {apps.map((app) => (
        <div key={app.appName}>
          {app.ios ? <BuildRow build={app.ios} /> : null}
          {app.android ? <BuildRow build={app.android} /> : null}
        </div>
      ))}
    </div>
  );
};