import assert from 'node:assert/strict'
import { test } from 'node:test'
import { getWindowThresholdAlarm } from '../src/utils/thresholdAlarmWindow.ts'

const second = (value) => value * 1000

test('第 25 秒检查第 16～25 秒，窗口内任一点超限就告警', () => {
  const points = Array.from({ length: 10 }, (_, index) => ({
    ts: second(index + 16),
    value: index === 0 ? 1101 : 800
  }))

  assert.deepEqual(getWindowThresholdAlarm(points, second(25), 10, 500, 1000, 100), {
    value: 1101,
    threshold: 1100,
    baseThreshold: 1000,
    direction: 'high'
  })
})

test('第 15 秒的越限点不属于第 25 秒的 10 秒窗口', () => {
  const points = [
    { ts: second(15), value: 1101 },
    { ts: second(25), value: 800 }
  ]

  assert.equal(getWindowThresholdAlarm(points, second(25), 10, 500, 1000, 100), undefined)
})

test('窗口随当前时间右移，旧越限点退出后告警解除', () => {
  const points = [
    { ts: second(16), value: 1101 },
    { ts: second(25), value: 800 },
    { ts: second(26), value: 800 }
  ]

  assert.equal(getWindowThresholdAlarm(points, second(26), 10, 500, 1000, 100), undefined)
})

test('下限按阈值减去范围检查，优先展示最近一次越限点', () => {
  const points = [
    { ts: second(16), value: 1101 },
    { ts: second(22), value: 399 },
    { ts: second(25), value: 800 }
  ]

  assert.deepEqual(getWindowThresholdAlarm(points, second(25), 10, 500, 1000, 100), {
    value: 399,
    threshold: 400,
    baseThreshold: 500,
    direction: 'low'
  })
})

test('范围边界相等时不触发', () => {
  const points = [
    { ts: second(24), value: 1100 },
    { ts: second(25), value: 400 }
  ]

  assert.equal(getWindowThresholdAlarm(points, second(25), 10, 500, 1000, 100), undefined)
})

test('乱序数据中晚于当前时间的点不参与检查', () => {
  const points = [
    { ts: second(25), value: 800 },
    { ts: second(26), value: 1101 }
  ]

  assert.equal(getWindowThresholdAlarm(points, second(25), 10, 500, 1000, 100), undefined)
})

test('未设置窗口时只检查当前点，保留原有立即告警语义', () => {
  const points = [
    { ts: second(24), value: 1001 },
    { ts: second(25), value: 800 }
  ]

  assert.equal(getWindowThresholdAlarm(points, second(25), 0, 500, 1000), undefined)
})