import {
  count,
  createUser,
  db,
  del,
  formWithFile,
  get,
  insertDump,
  insertPlaylist,
  PNG,
  post,
  put,
  test,
  TEST_DIR,
} from "./helpers.ts";
import { assert, assertEquals, assertMatch } from "@std/assert";

function ids(res: { body: { data: { dumps: { id: string }[] } } }): string[] {
  return res.body.data.dumps.map((d) => d.id);
}

test("POST /api/playlists creates; GET finds it by id or slug", async () => {
  const user = await createUser();
  const res = await post("/api/playlists", {
    auth: user.auth,
    json: { title: "Road Trip", description: "songs", isPublic: true },
  });
  assertEquals(res.status, 201);
  const { id, slug } = res.body.data;
  assertMatch(slug, /^road-trip-/);
  assertEquals(
    (await get(`/api/playlists/${id}`)).body.data.title,
    "Road Trip",
  );
  const bySlug = await get(`/api/playlists/${slug}`);
  assertEquals(bySlug.body.data.id, id);
  assertEquals(bySlug.body.data.ownerUsername, user.username);
  assertEquals(bySlug.body.data.dumps, []);
  assertEquals(
    (await post("/api/playlists", { auth: user.auth, json: { title: "" } }))
      .status,
    400,
  );
  assertEquals(
    (await post("/api/playlists", { json: { title: "x", isPublic: true } }))
      .status,
    401,
  );
});

test("private playlists are the owner's alone", async () => {
  const owner = await createUser();
  const other = await createUser();
  const { id } = insertPlaylist({ userId: owner.id, isPublic: false });
  assertEquals((await get(`/api/playlists/${id}`)).status, 404);
  assertEquals(
    (await get(`/api/playlists/${id}`, { auth: other.auth })).status,
    404,
  );
  assertEquals(
    (await get(`/api/playlists/${id}`, { auth: owner.auth })).status,
    200,
  );
  insertPlaylist({ userId: owner.id });
  const path = `/api/users/${owner.username}/playlists`;
  assertEquals((await get(path)).body.data.total, 1);
  assertEquals((await get(path, { auth: owner.auth })).body.data.total, 2);
});

test("adding dumps: newest on top, no duplicates, only dumps you can see", async () => {
  const owner = await createUser();
  const other = await createUser();
  const { id } = insertPlaylist({ userId: owner.id });
  const a = insertDump({ userId: owner.id, title: "a" });
  const b = insertDump({ userId: other.id, title: "b" });
  const theirs = insertDump({ userId: other.id, isPrivate: true });

  assertEquals(
    (await post(`/api/playlists/${id}/dumps/${a.id}`, { auth: owner.auth }))
      .status,
    204,
  );
  assertEquals(
    (await post(`/api/playlists/${id}/dumps/${b.id}`, { auth: owner.auth }))
      .status,
    204,
  );
  assertEquals(ids(await get(`/api/playlists/${id}`)), [b.id, a.id]);
  assertEquals(
    (await post(`/api/playlists/${id}/dumps/${a.id}`, { auth: owner.auth }))
      .status,
    409,
  );
  assertEquals(
    (await post(`/api/playlists/${id}/dumps/${theirs.id}`, {
      auth: owner.auth,
    })).status,
    404,
  );
  assertEquals(
    (await post(`/api/playlists/${id}/dumps/${crypto.randomUUID()}`, {
      auth: owner.auth,
    }))
      .status,
    404,
  );
  assertEquals(
    (await post(`/api/playlists/${id}/dumps/${a.id}`, { auth: other.auth }))
      .status,
    403,
  );
  assertEquals((await get(`/api/playlists/${id}`)).body.data.dumpCount, 2);
});

test("a public playlist hides its private dumps from everyone but their owner", async () => {
  const owner = await createUser();
  const { id } = insertPlaylist({ userId: owner.id });
  const pub = insertDump({ userId: owner.id });
  const priv = insertDump({ userId: owner.id, isPrivate: true });
  for (const d of [pub, priv]) {
    await post(`/api/playlists/${id}/dumps/${d.id}`, { auth: owner.auth });
  }
  assertEquals(ids(await get(`/api/playlists/${id}`)), [pub.id]);
  assertEquals(
    ids(await get(`/api/playlists/${id}`, { auth: owner.auth })).length,
    2,
  );
});

test("reorder: must name exactly the current members", async () => {
  const owner = await createUser();
  const { id } = insertPlaylist({ userId: owner.id });
  const [a, b, c] = [1, 2, 3].map(() => insertDump({ userId: owner.id }));
  for (const d of [a, b, c]) {
    await post(`/api/playlists/${id}/dumps/${d.id}`, { auth: owner.auth });
  }
  const order = [a.id, c.id, b.id];
  assertEquals(
    (await put(`/api/playlists/${id}/order`, {
      auth: owner.auth,
      json: { dumpIds: order },
    }))
      .status,
    200,
  );
  assertEquals(ids(await get(`/api/playlists/${id}`)), order);
  for (const dumpIds of [[a.id, b.id], [a.id, b.id, crypto.randomUUID()]]) {
    assertEquals(
      (await put(`/api/playlists/${id}/order`, {
        auth: owner.auth,
        json: { dumpIds },
      }))
        .status,
      400,
      JSON.stringify(dumpIds),
    );
  }
  // A dump added after reordering still lands on top.
  const d = insertDump({ userId: owner.id });
  await post(`/api/playlists/${id}/dumps/${d.id}`, { auth: owner.auth });
  assertEquals(ids(await get(`/api/playlists/${id}`))[0], d.id);
});

test("reorder: a list naming a member twice is not the current members", async () => {
  const owner = await createUser();
  const { id } = insertPlaylist({ userId: owner.id });
  const [a, b] = [1, 2].map(() => insertDump({ userId: owner.id }));
  for (const d of [a, b]) {
    await post(`/api/playlists/${id}/dumps/${d.id}`, { auth: owner.auth });
  }
  const res = await put(`/api/playlists/${id}/order`, {
    auth: owner.auth,
    json: { dumpIds: [a.id, b.id, a.id] },
  });
  assertEquals(res.status, 400);
});

test("removing a dump; updating; deleting", async () => {
  const owner = await createUser();
  const other = await createUser();
  const mod = await createUser({ role: "moderator" });
  const { id } = insertPlaylist({ userId: owner.id, title: "Old" });
  const a = insertDump({ userId: owner.id });
  await post(`/api/playlists/${id}/dumps/${a.id}`, { auth: owner.auth });
  assertEquals(
    (await del(`/api/playlists/${id}/dumps/${a.id}`, { auth: other.auth }))
      .status,
    403,
  );
  assertEquals(
    (await del(`/api/playlists/${id}/dumps/${a.id}`, { auth: owner.auth }))
      .status,
    204,
  );
  assertEquals(ids(await get(`/api/playlists/${id}`)), []);

  assertEquals(
    (await put(`/api/playlists/${id}`, {
      auth: other.auth,
      json: { title: "x" },
    })).status,
    403,
  );
  const updated = await put(`/api/playlists/${id}`, {
    auth: owner.auth,
    json: { title: "New", description: "d", isPublic: false },
  });
  assertEquals(updated.body.data.title, "New");
  assertMatch(updated.body.data.slug, /^new-/);
  assertEquals(updated.body.data.isPublic, false);
  const cleared = await put(`/api/playlists/${id}`, {
    auth: owner.auth,
    json: { description: null },
  });
  assertEquals(cleared.body.data.description, undefined);
  assertEquals(cleared.body.data.title, "New");

  assertEquals(
    (await del(`/api/playlists/${id}`, { auth: other.auth })).status,
    403,
  );
  assertEquals(
    (await del(`/api/playlists/${id}`, { auth: mod.auth })).status,
    204,
  );
  assertEquals(
    (await get(`/api/playlists/${id}`, { auth: owner.auth })).status,
    404,
  );
  assertEquals(count(`SELECT COUNT(*) as n FROM playlist_dumps;`), 0);
});

test("memberships: which of my playlists hold this dump", async () => {
  const owner = await createUser();
  const other = await createUser();
  const p1 = insertPlaylist({ userId: owner.id, title: "has" });
  insertPlaylist({ userId: owner.id, title: "hasnt" });
  insertPlaylist({ userId: other.id, title: "theirs" });
  const d = insertDump({ userId: owner.id });
  await post(`/api/playlists/${p1.id}/dumps/${d.id}`, { auth: owner.auth });
  const res = await get(`/api/playlists/by-dump/${d.id}/memberships`, {
    auth: owner.auth,
  });
  const byTitle = Object.fromEntries(
    res.body.data.map((
      m: { playlist: { title: string }; hasDump: boolean },
    ) => [
      m.playlist.title,
      m.hasDump,
    ]),
  );
  assertEquals(byTitle, { has: true, hasnt: false });
});

test("adding to a followed public playlist notifies followers, private dumps excepted", async () => {
  const owner = await createUser();
  const follower = await createUser();
  const { id } = insertPlaylist({ userId: owner.id, title: "Mix" });
  await post(`/api/follows/playlists/${id}`, { auth: follower.auth });
  db.exec(`DELETE FROM notifications;`); // the follow notified the owner
  const priv = insertDump({ userId: owner.id, isPrivate: true });
  await post(`/api/playlists/${id}/dumps/${priv.id}`, { auth: owner.auth });
  assertEquals(count(`SELECT COUNT(*) as n FROM notifications;`), 0);
  const pub = insertDump({ userId: owner.id, title: "Song" });
  await post(`/api/playlists/${id}/dumps/${pub.id}`, { auth: owner.auth });
  const note = db.prepare(`SELECT user_id, type, data FROM notifications;`)
    .get() as {
      user_id: string;
      type: string;
      data: string;
    };
  assertEquals(note.user_id, follower.id);
  assertEquals(note.type, "playlist_dump_added");
  assertEquals(JSON.parse(note.data), {
    dumpId: pub.id,
    dumpTitle: "Song",
    playlistId: id,
    playlistTitle: "Mix",
  });
});

test("playlist images: upload and serve", async () => {
  const owner = await createUser();
  const other = await createUser();
  const { id, slug } = insertPlaylist({ userId: owner.id });
  assertEquals((await get(`/api/playlists/${id}/image`)).status, 404);
  assertEquals(
    (await post(`/api/playlists/${id}/image`, {
      auth: other.auth,
      form: formWithFile(PNG),
    }))
      .status,
    403,
  );
  const res = await post(`/api/playlists/${slug}/image`, {
    auth: owner.auth,
    form: formWithFile(PNG),
  });
  assertEquals(res.status, 200);
  assertEquals(res.body.data.imageMime, "image/png");
  // A new cover counts as an edit, so image URLs versioned on it change.
  assert(res.body.data.updatedAt);
  const served = await get(`/api/playlists/${slug}/image`);
  assertEquals(served.status, 200);
  assertEquals(served.bytes, PNG);
});

test("playlist images: a failed write leaves the row and the old cover alone", async () => {
  const owner = await createUser();
  const { id } = insertPlaylist({ userId: owner.id });
  const dir = `${TEST_DIR}/uploads/playlist-images`;
  const row = () =>
    db.prepare(`SELECT image_mime, updated_at FROM playlists WHERE id = ?;`)
      .get(id) as { image_mime: string | null; updated_at: string | null };

  // No cover yet, and the write fails (a directory sits where the file goes):
  // the playlist mustn't claim a cover it hasn't got.
  await Deno.mkdir(`${dir}/${id}/blocker`, { recursive: true });
  try {
    const failed = await post(`/api/playlists/${id}/image`, {
      auth: owner.auth,
      form: formWithFile(PNG),
    });
    assertEquals(failed.status, 500);
    assertEquals(row(), { image_mime: null, updated_at: null });
    assertEquals((await get(`/api/playlists/${id}/image`)).status, 404);
  } finally {
    await Deno.remove(`${dir}/${id}`, { recursive: true });
  }

  // With a cover in place, a failed replacement keeps serving the old one
  // under the old version, and leaves no stray temporary file behind.
  await post(`/api/playlists/${id}/image`, {
    auth: owner.auth,
    form: formWithFile(PNG),
  });
  const before = row();
  await Deno.chmod(dir, 0o555);
  try {
    const failed = await post(`/api/playlists/${id}/image`, {
      auth: owner.auth,
      form: formWithFile(new Uint8Array([...PNG, 0])),
    });
    assertEquals(failed.status, 500);
  } finally {
    await Deno.chmod(dir, 0o755);
  }
  assertEquals(row(), before);
  assertEquals((await get(`/api/playlists/${id}/image`)).bytes, PNG);
  const left = [...Deno.readDirSync(dir)]
    .map((e) => e.name)
    .filter((name) => name.startsWith(id));
  assertEquals(left, [id]);
});

test("playlist images: a replaced cover is served under the new version", async () => {
  const owner = await createUser();
  const { id } = insertPlaylist({ userId: owner.id });
  const first = await post(`/api/playlists/${id}/image`, {
    auth: owner.auth,
    form: formWithFile(PNG),
  });
  await new Promise((r) => setTimeout(r, 5)); // a distinct updated_at
  const other = new Uint8Array([...PNG, 1, 2, 3]);
  const second = await post(`/api/playlists/${id}/image`, {
    auth: owner.auth,
    form: formWithFile(other),
  });
  assert(second.body.data.updatedAt !== first.body.data.updatedAt);
  assertEquals((await get(`/api/playlists/${id}/image`)).bytes, other);
});

test("reorder: someone else's dump that went private keeps its slot", async () => {
  const owner = await createUser();
  const author = await createUser();
  const { id } = insertPlaylist({ userId: owner.id });
  const a = insertDump({ userId: owner.id });
  const theirs = insertDump({ userId: author.id });
  const b = insertDump({ userId: owner.id });
  // Each add goes on top: the order is b, theirs, a.
  for (const d of [a, theirs, b]) {
    await post(`/api/playlists/${id}/dumps/${d.id}`, { auth: owner.auth });
  }
  await put(`/api/dumps/${theirs.id}`, {
    auth: author.auth,
    json: { isPrivate: true },
  });
  // The owner can't see it, so can't name it: what they see is theirs to order.
  assertEquals(ids(await get(`/api/playlists/${id}`, { auth: owner.auth })), [
    b.id,
    a.id,
  ]);
  const res = await put(`/api/playlists/${id}/order`, {
    auth: owner.auth,
    json: { dumpIds: [a.id, b.id] },
  });
  assertEquals(res.status, 200);
  assertEquals(ids(await get(`/api/playlists/${id}`, { auth: owner.auth })), [
    a.id,
    b.id,
  ]);
  // The hidden one hasn't moved, and comes back where it was if made public.
  await put(`/api/dumps/${theirs.id}`, {
    auth: author.auth,
    json: { isPrivate: false },
  });
  assertEquals(ids(await get(`/api/playlists/${id}`)), [a.id, theirs.id, b.id]);
  // Naming a hidden id is still not the list the requester sees.
  await put(`/api/dumps/${theirs.id}`, {
    auth: author.auth,
    json: { isPrivate: true },
  });
  assertEquals(
    (await put(`/api/playlists/${id}/order`, {
      auth: owner.auth,
      json: { dumpIds: [a.id, theirs.id, b.id] },
    })).status,
    400,
  );
});

test("reorder: a moderator orders around the owner's private dumps", async () => {
  const owner = await createUser();
  const mod = await createUser({ role: "moderator" });
  const { id } = insertPlaylist({ userId: owner.id });
  const a = insertDump({ userId: owner.id });
  const priv = insertDump({ userId: owner.id, isPrivate: true });
  const b = insertDump({ userId: owner.id });
  for (const d of [a, priv, b]) {
    await post(`/api/playlists/${id}/dumps/${d.id}`, { auth: owner.auth });
  }
  assertEquals(ids(await get(`/api/playlists/${id}`, { auth: mod.auth })), [
    b.id,
    a.id,
  ]);
  assertEquals(
    (await put(`/api/playlists/${id}/order`, {
      auth: mod.auth,
      json: { dumpIds: [a.id, b.id] },
    })).status,
    200,
  );
  assertEquals(ids(await get(`/api/playlists/${id}`, { auth: owner.auth })), [
    a.id,
    priv.id,
    b.id,
  ]);
});