const test = require('node:test')
const assert = require('node:assert/strict')

const { getTrendData, getBarPercent } = require('../utils/util')

test('weekly trend combines multiple sessions from the same day', () => {
  const records = {
    '2026-07': [
      { date: '2026-07-29 08:00:00', duration: 30 },
      { date: '2026-07-29 20:00:00', duration: 45 },
      { date: '2026-07-23 08:00:00', duration: 60 }
    ]
  }

  assert.deepEqual(getTrendData(records, 'week', new Date(2026, 6, 29)), [
    { label: '四', value: 60, valueText: '01:00', highlight: false },
    { label: '五', value: 0, valueText: '', highlight: false },
    { label: '六', value: 0, valueText: '', highlight: false },
    { label: '日', value: 0, valueText: '', highlight: false },
    { label: '一', value: 0, valueText: '', highlight: false },
    { label: '二', value: 0, valueText: '', highlight: false },
    { label: '今天', value: 75, valueText: '01:15', highlight: true }
  ])
})

test('monthly trend spans a year boundary from a single record snapshot', () => {
  const records = {
    '2025-08': [{ date: '2025-08-31 08:00:00', duration: 60 }],
    '2025-12': [{ date: '2025-12-01 08:00:00', duration: 120 }],
    '2026-01': [{ date: '2026-01-02 08:00:00', duration: 3600 }]
  }

  assert.deepEqual(getTrendData(records, 'month', new Date(2026, 0, 15)), [
    { label: '8月', value: 60, valueText: '01:00', highlight: false },
    { label: '9月', value: 0, valueText: '', highlight: false },
    { label: '10月', value: 0, valueText: '', highlight: false },
    { label: '11月', value: 0, valueText: '', highlight: false },
    { label: '12月', value: 120, valueText: '02:00', highlight: false },
    { label: '1月', value: 3600, valueText: '60m', highlight: true }
  ])
})

test('bar height remains proportional for very short sessions', () => {
  assert.equal(getBarPercent(0, 120), 0)
  assert.ok(getBarPercent(1, 120) < 1)
  assert.equal(getBarPercent(120, 120), 100)
})