import { expect, describe, test } from 'bun:test'

describe('date', () => {
  test('date.now returns current timestamp', () => {
    expect(`date.now | number?`).toEvaluateTo(true)

    expect(`(date.now) > 1577836800000`).toEvaluateTo(true)
  })

  test('date.new creates timestamp from components', () => {
    expect(`
      t = date.new 2024 0 1 12 0 0 500
      [
        (date.year t)
        (date.month t)
        (date.date t)
        (date.hour t)
        (date.minute t)
        (date.second t)
        (date.ms t)
      ]
    `).toEvaluateTo([2024, 0, 1, 12, 0, 0, 500])
  })

  test('date.new with minimal arguments', () => {
    expect(`
      t = date.new 2024 5 15
      [
        (date.year t)
        (date.month t)
        (date.date t)
        (date.hour t)
        (date.minute t)
        (date.second t)
        (date.ms t)
      ]
    `).toEvaluateTo([2024, 5, 15, 0, 0, 0, 0])
  })

  test('date.year extracts year', () => {
    expect(`
      t = date.new 2024 0 1
      date.year t
    `).toEvaluateTo(2024)

    expect(`
      t = date.new 1999 11 31
      date.year t
    `).toEvaluateTo(1999)
  })

  test('date.month extracts month (0-indexed)', () => {
    // January = 0, December = 11
    expect(`
      jan = date.new 2024 0 1
      dec = date.new 2024 11 31
      [(date.month jan) (date.month dec)]
    `).toEvaluateTo([0, 11])
  })

  test('date.date extracts day of month', () => {
    expect(`
      t = date.new 2024 5 15
      date.date t
    `).toEvaluateTo(15)

    expect(`
      date.new 2024 0 1 | date.date
    `).toEvaluateTo(1)
  })

  test('date.hour extracts hour', () => {
    expect(`
      t = date.new 2024 0 1 14 30 45
      date.hour t
    `).toEvaluateTo(14)

    expect(`
      t = date.new 2024 0 1 0 0 0
      date.hour t
    `).toEvaluateTo(0)
  })

  test('date.minute extracts minute', () => {
    expect(`
      t = date.new 2024 0 1 14 30 45
      date.minute t
    `).toEvaluateTo(30)
  })

  test('date.second extracts second', () => {
    expect(`
      t = date.new 2024 0 1 14 30 45
      date.second t
    `).toEvaluateTo(45)
  })

  test('date.ms extracts milliseconds', () => {
    expect(`
      t = date.new 2024 0 1 14 30 45 250
      date.ms t
    `).toEvaluateTo(250)
  })

  test('round-trip: create and extract components', () => {
    expect(`
      t = date.new 2024 6 4 15 30 45 123
      year = date.year t
      month = date.month t
      day = date.date t
      hour = date.hour t
      min = date.minute t
      sec = date.second t
      ms = date.ms t
      [year month day hour min sec ms]
    `).toEvaluateTo([2024, 6, 4, 15, 30, 45, 123])
  })

  test('edge cases - midnight', () => {
    expect(`
      t = date.new 2024 0 1 0 0 0 0
      [
        (date.hour t)
        (date.minute t)
        (date.second t)
        (date.ms t)
      ]
    `).toEvaluateTo([0, 0, 0, 0])
  })

  test('edge cases - end of day', () => {
    expect(`
      t = date.new 2024 0 1 23 59 59 999
      [
        (date.hour t)
        (date.minute t)
        (date.second t)
        (date.ms t)
      ]
    `).toEvaluateTo([23, 59, 59, 999])
  })

  test('edge cases - leap year', () => {
    expect(`
      t = date.new 2024 1 29
      [
        (date.year t)
        (date.month t)
        (date.date t)
      ]
    `).toEvaluateTo([2024, 1, 29])
  })

  test('combining date functions with arithmetic', () => {
    expect(`
      t = date.new 2024 5 15 10 30 0
      next-hour = date.new 2024 5 15 11 30 0
      (date.hour next-hour) - (date.hour t)
    `).toEvaluateTo(1)
  })

  test('using date.now in calculations', () => {
    // Check that date.now is in the past compared to a future timestamp
    expect(`
      now = (date.now)
      future = date.new 2030 0 1
      future > now
    `).toEvaluateTo(true)
  })
})