// @flow
/* eslint-env mocha */

import assert from 'power-assert'
import set from '.'

describe('set', function() {
  it('sets all values', function() {
    const result = set(new Date(2013, 0 /* Jan */), {
      year: 2014,
      month: 8, // Sep
      date: 20,
      hours: 12,
      minutes: 12,
      seconds: 12,
      milliseconds: 12
    })
    assert.deepEqual(
      result.toString(),
      new Date(2014, 8 /* Sep */, 20, 12, 12, 12, 12).toString()
    )
  })

  it('sets year', function() {
    const result = set(new Date(2013, 8 /* Sep */), { year: 2014 })
    assert.deepEqual(result, new Date(2014, 8 /* Sep */))
  })

  it('sets month', function() {
    const result = set(new Date(2014, 8 /* Sep */), { month: 9 /* Oct */ })
    assert.deepEqual(result, new Date(2014, 9 /* Oct */))
  })

  it('sets day of month', function() {
    const result = set(new Date(2014, 8 /* Sep */), { date: 20 })
    assert.deepEqual(result, new Date(2014, 8 /* Sep */, 20))
  })

  it('sets hours', function() {
    const result = set(new Date(2014, 8 /* Sep */, 1), { hours: 12 })
    assert.deepEqual(result, new Date(2014, 8 /* Sep */, 1, 12))
  })

  it('sets minutes', function() {
    const result = set(new Date(2014, 8 /* Sep */, 1, 1), { minutes: 12 })
    assert.deepEqual(result, new Date(2014, 8 /* Sep */, 1, 1, 12))
  })

  it('sets seconds', function() {
    const result = set(new Date(2014, 8 /* Sep */, 1, 1, 1), { seconds: 12 })
    assert.deepEqual(result, new Date(2014, 8 /* Sep */, 1, 1, 1, 12))
  })

  it('sets milliseconds', function() {
    const result = set(new Date(2014, 8 /* Sep */, 1, 1, 1, 1), {
      milliseconds: 500
    })
    assert.deepEqual(result, new Date(2014, 8 /* Sep */, 1, 1, 1, 1, 500))
  })

  describe('value overflow', function() {
    it('months overflow into years', function() {
      const result = set(new Date(2014, 8 /* Sep */, 1), {
        month: 12 /* 13th month */
      })
      assert.deepEqual(result, new Date(2015, 0 /* Jan */, 1))
    })

    it('days of months overflow into months', function() {
      const result = set(new Date(2014, 8 /* Sep */, 1), { date: 31 })
      assert.deepEqual(result, new Date(2014, 9 /* Oct */, 1))
    })

    it('hours overflow into days', function() {
      const result = set(new Date(2014, 8 /* Sep */, 19), { hours: 24 })
      assert.deepEqual(result, new Date(2014, 8 /* Sep */, 20))
    })

    it('minutes overflow into hours', function() {
      const result = set(new Date(2014, 8 /* Sep */, 20, 11), { minutes: 60 })
      assert.deepEqual(result, new Date(2014, 8 /* Sep */, 20, 12))
    })

    it('seconds overflow into minutes', function() {
      const result = set(new Date(2014, 8 /* Sep */, 20, 12, 58), { seconds: 60 })
      assert.deepEqual(result, new Date(2014, 8 /* Sep */, 20, 12, 59))
    })

    it('milliseconds overflow into seconds', function() {
      const result = set(new Date(2014, 8 /* Sep */, 20, 12, 58, 30), {
        milliseconds: 1000
      })
      assert.deepEqual(result, new Date(2014, 8 /* Sep */, 20, 12, 58, 31))
    })
  })

  describe('edge cases', function() {
    it('sets January', function() {
      const result = set(new Date(2014, 8 /* Sep */), { month: 0 /* Jan */ })
      assert.deepEqual(result, new Date(2014, 0 /* Jan */))
    })

    it('sets the last day of new month if the initial date was the last day of a longer month', function() {
      const result = set(new Date(2014, 7 /* Aug */, 31), { month: 8 /* Sep */ })
      assert.deepEqual(result, new Date(2014, 8 /* Sep */, 30))
    })

    it('ignores undefined values', function() {
      const result = set(new Date(2014, 8 /* Sep */), { year: undefined })
      assert.deepEqual(result, new Date(2014, 8 /* Sep */))
    })

    it('ignores null values', function() {
      // @ts-expect-error
      const result = set(new Date(2014, 8 /* Sep */), { year: null })
      assert.deepEqual(result, new Date(2014, 8 /* Sep */))
    })

    it('throws TypeError exception if passed less than 2 arguments', function() {
      assert.throws(set.bind(null), TypeError)
    })

    it('returns Invalid Date if any value in values is NaN', function() {
      const result = set(new Date(2014, 8 /* Sep */), { year: NaN })
      assert.deepEqual(isNaN(result.getTime()), isNaN((new Date(NaN)).getTime()))
    })

    it('returns Invalid Date the initial date was Invalid Date as well', function() {
      const result = set(new Date(NaN), { year: 2019 })
      assert.deepEqual(isNaN(result.getTime()), isNaN((new Date(NaN)).getTime()))
    })

    it('throws RangeError exception if `values` is not an object', function() {
      // @ts-expect-error
      assert.throws(set.bind(null, new Date(), true), RangeError)
    })

    it('throws RangeError exception if `values` is null', function() {
      // @ts-expect-error
      assert.throws(set.bind(null, new Date(), null), RangeError)
    })
  })
})