import { describe, expect, it } from 'vitest'
import { isQuietAt, type QuietHours } from './types'

function at(iso: string): Date {
  return new Date(iso)
}

const ALL_DAYS = [0, 1, 2, 3, 4, 5, 6]

describe('isQuietAt', () => {
  it('returns false when disabled', () => {
    const qh: QuietHours = {
      enabled: false,
      from: '00:00',
      to: '23:59',
      days: ALL_DAYS
    }
    expect(isQuietAt(qh, at('2026-05-17T12:00:00'))).toBe(false)
  })

  it('same-day window: inside is quiet, outside is not', () => {
    const qh: QuietHours = {
      enabled: true,
      from: '13:00',
      to: '14:00',
      days: ALL_DAYS
    }
    expect(isQuietAt(qh, at('2026-05-17T13:30:00'))).toBe(true)
    expect(isQuietAt(qh, at('2026-05-17T12:59:00'))).toBe(false)
    expect(isQuietAt(qh, at('2026-05-17T14:00:00'))).toBe(false) // exclusive end
  })

  it('wrap-around window 22:00 → 08:00', () => {
    const qh: QuietHours = {
      enabled: true,
      from: '22:00',
      to: '08:00',
      days: ALL_DAYS
    }
    expect(isQuietAt(qh, at('2026-05-17T23:00:00'))).toBe(true)
    expect(isQuietAt(qh, at('2026-05-17T02:00:00'))).toBe(true)
    expect(isQuietAt(qh, at('2026-05-17T07:59:00'))).toBe(true)
    expect(isQuietAt(qh, at('2026-05-17T08:00:00'))).toBe(false)
    expect(isQuietAt(qh, at('2026-05-17T15:00:00'))).toBe(false)
    expect(isQuietAt(qh, at('2026-05-17T21:59:00'))).toBe(false)
  })

  it('day filtering: window inactive on excluded days', () => {
    const qh: QuietHours = {
      enabled: true,
      from: '13:00',
      to: '14:00',
      days: [1, 2, 3, 4, 5] // weekdays only
    }
    // 2026-05-17 is Sunday (day 0)
    expect(isQuietAt(qh, at('2026-05-17T13:30:00'))).toBe(false)
    // 2026-05-18 is Monday (day 1)
    expect(isQuietAt(qh, at('2026-05-18T13:30:00'))).toBe(true)
  })

  it('wrap-around + day filter: window day matters, not current day', () => {
    // from=22:00, to=07:00, days=[Mon..Fri].
    const qh: QuietHours = {
      enabled: true,
      from: '22:00',
      to: '07:00',
      days: [1, 2, 3, 4, 5]
    }
    // Friday 23:00 -> window starts today, Friday in filter -> quiet
    expect(isQuietAt(qh, at('2026-05-15T23:00:00'))).toBe(true)
    // Saturday 02:00 -> window started Friday 22:00, Friday in filter -> quiet
    expect(isQuietAt(qh, at('2026-05-16T02:00:00'))).toBe(true)
    // Saturday 23:00 -> would start today, Saturday not in filter -> noisy
    expect(isQuietAt(qh, at('2026-05-16T23:00:00'))).toBe(false)
    // Sunday 02:00 -> started Saturday, Saturday not in filter -> noisy
    expect(isQuietAt(qh, at('2026-05-17T02:00:00'))).toBe(false)
    // Monday 01:00 -> would have started Sunday, Sunday not in filter -> noisy
    expect(isQuietAt(qh, at('2026-05-18T01:00:00'))).toBe(false)
    // Monday 23:00 -> starts today, Monday in filter -> quiet
    expect(isQuietAt(qh, at('2026-05-18T23:00:00'))).toBe(true)
  })

  it('malformed from/to falls back to non-quiet', () => {
    const qh: QuietHours = {
      enabled: true,
      from: 'bogus',
      to: '08:00',
      days: ALL_DAYS
    }
    expect(isQuietAt(qh, at('2026-05-17T05:00:00'))).toBe(false)
  })

  it('zero-length window (from === to) is never quiet', () => {
    const qh: QuietHours = {
      enabled: true,
      from: '12:00',
      to: '12:00',
      days: ALL_DAYS
    }
    expect(isQuietAt(qh, at('2026-05-17T12:00:00'))).toBe(false)
    expect(isQuietAt(qh, at('2026-05-17T12:00:01'))).toBe(false)
  })
})