import {
  BASE_URL,
  createUser,
  db,
  insertDump,
  insertPlaylist,
  test,
} from "../helpers.ts";
import { assertEquals, assertFalse, assertStringIncludes } from "@std/assert";
import { Application } from "@oak/oak";
import { ogMiddleware } from "../../middleware/og.ts";

async function handle(
  app: Application,
  path: string,
  headers: HeadersInit = {},
) {
  const res = await app.handle(new Request(`${BASE_URL}${path}`, { headers }));
  if (!res) throw new Error("no response");
  return { res, text: await res.text() };
}

function ogApp() {
  const app = new Application();
  app.use(ogMiddleware);
  app.use((ctx) => {
    ctx.response.body = "fallthrough";
  });
  return app;
}

test("ogMiddleware: dump pages get escaped OG tags", async () => {
  const user = await createUser();
  const dump = insertDump({
    userId: user.id,
    title: `Tom & "Jerry" <script>`,
    comment: "A comment",
    richContent: {
      type: "generic",
      url: "x",
      thumbnailUrl: "https://img.test/a.jpg",
    },
  });
  const { res, text } = await handle(ogApp(), dump.path);
  assertEquals(res.headers.get("content-type"), "text/html; charset=utf-8");
  assertStringIncludes(
    text,
    `<meta property="og:title" content="Tom &amp; &quot;Jerry&quot; &lt;script&gt;" />`,
  );
  assertStringIncludes(
    text,
    `<title>Tom &amp; &quot;Jerry&quot; &lt;script&gt;</title>`,
  );
  assertStringIncludes(
    text,
    `<meta property="og:description" content="A comment" />`,
  );
  assertStringIncludes(
    text,
    `<meta property="og:image" content="https://img.test/a.jpg" />`,
  );
  assertStringIncludes(text, `content="summary_large_image"`);
  assertStringIncludes(
    text,
    `<meta property="og:url" content="${BASE_URL}${dump.path}" />`,
  );
  // The index's own title is replaced, not duplicated.
  assertEquals(text.match(/<title>/g)?.length, 1);
  assertFalse(text.includes("__SITE_NAME__"));
});

test("ogMiddleware: no artwork falls back to the site icon as a small card", async () => {
  const user = await createUser();
  const dump = insertDump({ userId: user.id, title: "Plain" });
  const { text } = await handle(ogApp(), dump.path);
  assertStringIncludes(text, `content="${BASE_URL}/apple-touch-icon.png"`);
  assertStringIncludes(text, `<meta name="twitter:card" content="summary" />`);
  const file = insertDump({
    userId: user.id,
    fileName: "a.png",
    fileMime: "image/png",
  });
  assertStringIncludes(
    (await handle(ogApp(), file.path)).text,
    `content="${BASE_URL}/api/dumps/${file.id}/file"`,
  );
});

test("ogMiddleware: users and public playlists; private things fall through", async () => {
  const user = await createUser();
  const app = ogApp();
  assertStringIncludes(
    (await handle(app, `/@${user.username}/upvoted`)).text,
    `<meta property="og:title" content="${user.username}" />`,
  );
  assertEquals(
    (await handle(app, `/@${user.username}/nope`)).text,
    "fallthrough",
  );
  const pub = insertPlaylist({ userId: user.id, title: "Open list" });
  assertStringIncludes(
    (await handle(app, pub.path)).text,
    "Open list",
  );
  const priv = insertPlaylist({
    userId: user.id,
    title: "Closed",
    isPublic: false,
  });
  assertEquals(
    (await handle(app, priv.path)).text,
    "fallthrough",
  );
  const secret = insertDump({
    userId: user.id,
    title: "Secret",
    isPrivate: true,
  });
  assertEquals((await handle(app, secret.path)).text, "fallthrough");
  assertEquals(
    (await handle(app, `/@${user.username}/dumps/nope`)).text,
    "fallthrough",
  );
  // v3 paths aren't redirected.
  assertEquals((await handle(app, `/dumps/${secret.id}`)).text, "fallthrough");
  assertEquals(
    (await handle(app, `/api/dumps/${secret.id}`)).text,
    "fallthrough",
  );
  assertEquals((await handle(app, `/favicon.ico`)).text, "fallthrough");
});

test("ogMiddleware: a former slug, a former name or another case gets a 301", async () => {
  const user = await createUser();
  const dump = insertDump({ userId: user.id, title: "Now" });
  db.prepare(
    `INSERT INTO dump_slug_aliases (user_id, slug, dump_id, created_at) VALUES (?, 'before', ?, ?);`,
  ).run(user.id, dump.id, new Date().toISOString());
  db.prepare(
    `INSERT INTO user_aliases (username, user_id, created_at) VALUES ('old_name', ?, ?);`,
  ).run(user.id, new Date().toISOString());
  for (
    const [from, to] of [
      [`/@${user.username}/dumps/before?x=1`, `${dump.path}?x=1`],
      [`/@OLD_NAME/dumps/now`, dump.path],
      [`/@old_name/follow/playlists`, `/@${user.username}/follow/playlists`],
      [`/@${user.username.toUpperCase()}`, `/@${user.username}`],
      [`/@${user.username}@gerbeur.test/upvoted`, `/@${user.username}/upvoted`],
    ]
  ) {
    const { res } = await handle(ogApp(), from);
    assertEquals(res.status, 301, from);
    assertEquals(res.headers.get("location"), `${BASE_URL}${to}`, from);
  }
  // A remote user's path has dots in it, as a file's does.
  const remote = await createUser({ username: "bob@music.example" });
  const remoteDump = insertDump({ userId: remote.id, title: "Far" });
  assertStringIncludes(
    (await handle(ogApp(), remoteDump.path)).text,
    `<meta property="og:title" content="Far" />`,
  );
  const { res } = await handle(ogApp(), "/@BOB@music.example/dumps/far");
  assertEquals(res.status, 301);
  assertEquals(res.headers.get("location"), `${BASE_URL}${remoteDump.path}`);
  // A private dump's former slug tells nothing.
  const secret = insertDump({ userId: user.id, title: "S", isPrivate: true });
  db.prepare(
    `INSERT INTO dump_slug_aliases (user_id, slug, dump_id, created_at) VALUES (?, 'hush', ?, ?);`,
  ).run(user.id, secret.id, new Date().toISOString());
  assertEquals(
    (await handle(ogApp(), `/@${user.username}/dumps/hush`)).text,
    "fallthrough",
  );
});