import {
  createUser,
  db,
  insertComment,
  insertDump,
  insertPlaylist,
  test,
} from "../helpers.ts";
import { assertEquals } from "@std/assert";
import {
  communityStatsOf,
  getCommunityStats,
  refreshCommunityStats,
} from "../../services/community-service.ts";

const DAY = 86_400_000;
const ago = (ms: number) => new Date(Date.now() - ms).toISOString();
const week = () =>
  [new Date(Date.now() - 7 * DAY), new Date(Date.now() + 60_000)] as const;

function vote(dumpId: string, n: number) {
  db.prepare(`UPDATE dumps SET vote_count = ? WHERE id = ?;`).run(n, dumpId);
}

test("communityStatsOf: the period's top public dumps, members, public playlists and totals", async () => {
  const ann = await createUser({ createdAt: ago(20 * DAY) });
  const bob = await createUser({ invitedBy: ann.id, createdAt: ago(2 * DAY) });
  const cy = await createUser({ createdAt: ago(DAY) });
  const hit = insertDump({ userId: bob.id, title: "Hit" });
  vote(hit.id, 5);
  const tie = insertDump({ userId: ann.id, title: "Tie", createdAt: ago(DAY) });
  vote(tie.id, 2);
  const newer = insertDump({ userId: ann.id, title: "Newer" });
  vote(newer.id, 2);
  insertDump({ userId: ann.id, title: "No votes" });
  vote(insertDump({ userId: ann.id, title: "Private", isPrivate: true }).id, 9);
  vote(
    insertDump({ userId: ann.id, title: "Too old", createdAt: ago(10 * DAY) })
      .id,
    9,
  );
  insertComment({ dumpId: hit.id, userId: cy.id, body: "nice" });
  insertPlaylist({ userId: ann.id, title: "Small" });
  const full = insertPlaylist({ userId: bob.id, title: "Full" });
  insertPlaylist({ userId: bob.id, title: "Hidden", isPublic: false });
  db.prepare(
    `INSERT INTO playlist_dumps (playlist_id, dump_id, position, added_at) VALUES (?, ?, 0, ?), (?, ?, 1, ?);`,
  ).run(full.id, hit.id, ago(0), full.id, tie.id, ago(0));

  const stats = communityStatsOf(...week());
  assertEquals(stats.top.map((d) => d.title), ["Hit", "Newer", "Tie"]);
  assertEquals(stats.top[0].ownerUsername, bob.username);
  assertEquals(
    stats.members.map((m) => [m.username, m.invitedByUsername]),
    [[bob.username, ann.username], [cy.username, undefined]],
  );
  assertEquals(
    stats.playlists.map((p) => [p.title, p.dumpCount]),
    [["Full", 2], ["Small", 0]],
  );
  assertEquals(stats.totals, { dumps: 4, upvotes: 0, comments: 1 });
  assertEquals(stats.chatMessages, 0);
});

test("getCommunityStats: serves the last refresh, of the week or the month", async () => {
  const ann = await createUser({ createdAt: ago(20 * DAY) });
  vote(
    insertDump({ userId: ann.id, title: "Month", createdAt: ago(20 * DAY) })
      .id,
    1,
  );
  refreshCommunityStats();
  assertEquals(getCommunityStats("weekly").top, []);
  assertEquals(getCommunityStats("monthly").top.map((d) => d.title), [
    "Month",
  ]);
  assertEquals(getCommunityStats("monthly").members.length, 1);

  vote(
    insertDump({ userId: ann.id, title: "Later", createdAt: ago(1000) }).id,
    1,
  );
  assertEquals(getCommunityStats("weekly").top, []);
  refreshCommunityStats();
  assertEquals(getCommunityStats("weekly").top.map((d) => d.title), [
    "Later",
  ]);
});