Study/src/services/activityService.test.ts

import { describe, expect, it } from "vitest";
import { summarizeActivityBuckets, summarizeActivityRows } from "./activityService";

describe("summarizeActivityRows", () => {
  it("summarizes the remaining activity categories without Arcade fields", () => {
    const now = new Date("2026-08-07T18:00:00.000Z");
    const summary = summarizeActivityBuckets([
      { date: "2026-08-07", type: "FLASHCARD", count: 2 },
      { date: "2026-08-07", type: "QUIZ_QUESTION", count: 3 },
    ], now);

    expect(summary).toMatchObject({ flashcards: 2, questions: 3, currentStreak: 0 });
    expect(summary.days.find((day) => day.date === summary.today)).toMatchObject({ flashcards: 2, questions: 3, total: 5 });
    expect(summary).not.toHaveProperty("arcade");
  });

  it("keeps a 53-week display while preserving a longer current streak", () => {
    const now = new Date("2026-08-07T18:00:00.000Z");
    const activities = Array.from({ length: 400 }, (_, age) =>
      Array.from({ length: 20 }, () => ({
        type: "FLASHCARD",
        occurredAt: new Date(now.getTime() - age * 24 * 60 * 60 * 1000),
      }))
    ).flat();
    const summary = summarizeActivityRows(activities, now);
    expect(summary.days).toHaveLength(371);
    expect(summary.currentStreak).toBe(400);
    expect(summary.days.filter((day) => day.date <= summary.today).at(-1)?.date).toBe(summary.today);
  });

  it("preserves counts and long streaks from database-aggregated daily buckets", () => {
    const now = new Date("2026-08-07T18:00:00.000Z");
    const buckets = Array.from({ length: 400 }, (_, age) => ({
      date: new Date(now.getTime() - 7 * 60 * 60 * 1000 - age * 86_400_000)
        .toISOString()
        .slice(0, 10),
      type: "FLASHCARD",
      count: 20,
    }));
    const summary = summarizeActivityBuckets(buckets, now);
    expect(summary.currentStreak).toBe(400);
    expect(summary.days).toHaveLength(371);
  });
});