/**
 * ─────────────────────────────────────────────
 *  SPB Git — Personal Git Platform
 * ─────────────────────────────────────────────
 *  Author  : Simon-Pierre Boucher
 *  Contact : contact@spboucher.ai
 *  File    : test/unit/activity.test.mjs
 *  Purpose : Unit tests — contribution calendar building
 *  License : MIT © Simon-Pierre Boucher
 * ─────────────────────────────────────────────
 */

import { describe, it, expect } from 'vitest';
import { bucketByDay, buildCalendar, calendarSvg } from '../../src/stats/activity.mjs';

describe('bucketByDay', () => {
  it('groups unix timestamps by UTC day', () => {
    const noon = Date.UTC(2026, 0, 15, 12) / 1000;
    const evening = Date.UTC(2026, 0, 15, 22) / 1000;
    const nextDay = Date.UTC(2026, 0, 16, 1) / 1000;
    const days = bucketByDay([noon, evening, nextDay]);
    expect(days.get('2026-01-15')).toBe(2);
    expect(days.get('2026-01-16')).toBe(1);
  });
});

describe('buildCalendar', () => {
  it('builds 52 weeks ending today with levels 0-4', () => {
    const today = new Date(Date.UTC(2026, 7, 9));
    const days = new Map([
      ['2026-08-09', 12],
      ['2026-08-08', 3],
      ['2026-08-01', 1],
    ]);
    const cal = buildCalendar(days, today);
    expect(cal.weeks).toHaveLength(52);
    expect(cal.total).toBe(16);
    expect(cal.max).toBe(12);
    const flat = cal.weeks.flat().filter(Boolean);
    const busiest = flat.find((d) => d.date === '2026-08-09');
    expect(busiest.level).toBe(4);
    const light = flat.find((d) => d.date === '2026-08-01');
    expect(light.level).toBe(1);
    // Last cell of the grid is today.
    expect(flat[flat.length - 1].date).toBe('2026-08-09');
  });
});

describe('calendarSvg', () => {
  it('renders an accessible SVG with tooltips', () => {
    const cal = buildCalendar(new Map([['2026-08-09', 2]]), new Date(Date.UTC(2026, 7, 9)));
    const svg = calendarSvg(cal);
    expect(svg).toContain('<svg');
    expect(svg).toContain('role="img"');
    expect(svg).toContain('<title>2 commits on 2026-08-09</title>');
  });
});