import assert from 'assert'
import math from '../../../../src/bundleAny'

describe('intersect', function () {
  it('should calculate the intersection point of two 2D lines', function () {
    assert.deepStrictEqual(math.intersect([0, 0], [10, 10], [10, 0], [0, 10]), [5, 5])
    assert.deepStrictEqual(math.intersect(math.matrix([0, 0]), [10, 10], math.matrix([10, 0]), math.matrix([0, 10])), math.matrix([5, 5]))
    assert.deepStrictEqual(math.intersect(math.matrix([0, 0]), math.matrix([10, 10]), math.matrix([10, 0]), math.matrix([0, 10])), math.matrix([5, 5]))
    assert.deepStrictEqual(math.intersect([300, 90], [400, 97], [300, 130], [400, 125]), [633.3333333333334, 113.33333333333334])
  })

  it('should calculate the intersection point of two 3D lines', function () {
    assert.deepStrictEqual(math.intersect([0, 0, 0], [10, 10, 0], [10, 0, 0], [0, 10, 0]), [5, 5, 0])
    assert.deepStrictEqual(math.intersect(math.matrix([0, 0, 0]), [10, 10, 0], [10, 0, 0], math.matrix([0, 10, 0])), math.matrix([5, 5, 0]))
    assert.deepStrictEqual(math.intersect(math.matrix([0, 0, 0]), math.matrix([10, 10, 0]), math.matrix([10, 0, 0]), math.matrix([0, 10, 0])), math.matrix([5, 5, 0]))
  })

  it('should calculate the intersection point of a line and a plane', function () {
    assert.deepStrictEqual(math.intersect([1, 0, 1], [4, -2, 2], [1, 1, 1, 6]), [7, -4, 3])
    assert.deepStrictEqual(math.intersect(math.matrix([1, 0, 1]), [4, -2, 2], math.matrix([1, 1, 1, 6])), math.matrix([7, -4, 3]))
    assert.deepStrictEqual(math.intersect(math.matrix([1, 0, 1]), math.matrix([4, -2, 2]), math.matrix([1, 1, 1, 6])), math.matrix([7, -4, 3]))
  })

  it('should calculate the intersection point of a line and a plane with plane coefficients other than (1, 1, 1)', function () {
    assert.deepStrictEqual(math.intersect([0, 30, 0], [0, 21, 0], [0, 9, 0, 0]), [0, 0, 0])
    assert.deepStrictEqual(math.intersect(math.matrix([0, 30, 0]), [0, 21, 0], math.matrix([0, 9, 0, 0])), math.matrix([0, 0, 0]))
    assert.deepStrictEqual(math.intersect(math.matrix([0, 30, 0]), math.matrix([0, 21, 0]), math.matrix([0, 9, 0, 0])), math.matrix([0, 0, 0]))
  })

  it('should return null if the points do not intersect', function () {
    assert.deepStrictEqual(math.intersect([0, 1, 0], [0, 0, 0], [1, 1, 0], [1, 0, 0]), null)
    assert.deepStrictEqual(math.intersect([0, 1], [0, 0], [1, 1], [1, 0]), null)
  })

  it('should throw an error when number of arguments are other than 3 or 4', function () {
    assert.throws(function () { math.intersect([2, 0, 1], [1, 1, 1, 6]) }, /TypeError: Too few arguments in function intersect/)
    assert.throws(function () { math.intersect([2, 0, 1], [1, 1, 6], [2, 0, 1], [1, 1, 6], [0, 8, 1]) }, /TypeError: Too many arguments in function intersect/)
  })

  it('should throw an error for incompatible parameter types', function () {
    assert.throws(function () { math.intersect(2, 3, 6) }, /TypeError: Unexpected type of argument in function intersect/)
    assert.throws(function () { math.intersect([2, 0, 1], [1, 1, 1], [5, 1, 10]) }, /TypeError: Array with 4 numbers expected as third argument/)
    assert.throws(function () { math.intersect([], [], [], []) }, /TypeError: Arrays with two or thee dimensional points expected/)
    assert.throws(function () { math.intersect([2, 8, 9], 3, 6) }, /TypeError: Unexpected type of argument in function intersect/)
    assert.throws(function () { math.intersect('a', 'b', 'c', 'd') }, /TypeError: Unexpected type of argument in function intersect/)
  })

  it('should calculate the intersection point if coordinates are bignumbers', function () {
    const bigmath = math.create({ number: 'BigNumber', precision: 32 })
    const bigintersect = bigmath.intersect
    const bignumber = bigmath.bignumber

    assert.deepStrictEqual(bigmath.evaluate('intersect([0, 0], [10, 10], [10, 0], [0, 10])'), bigmath.matrix([bignumber(5), bignumber(5)]))
    assert.deepStrictEqual(bigintersect([bignumber(0), bignumber(0)], [bignumber(10), bignumber(10)], [bignumber(10), bignumber(0)], [bignumber(0), bignumber(10)]),
      [bignumber(5), bignumber(5)])
    assert.deepStrictEqual(bigintersect([bignumber(0), 0], [10, bignumber(10)], [10, bignumber(0)], [0, bignumber(10)]), [bignumber(5), bignumber(5)])
    assert.deepStrictEqual(bigintersect([bignumber(0), bignumber(0), bignumber(0)], [bignumber(10), bignumber(10), bignumber(0)], [bignumber(10), bignumber(0), bignumber(0)], [bignumber(0), bignumber(10), bignumber(0)]),
      [bignumber(5), bignumber(5), bignumber(0)])
    assert.deepStrictEqual(bigintersect([bignumber(1), bignumber(0), bignumber(1)], [bignumber(4), bignumber(-2), bignumber(2)], [bignumber(1), bignumber(1), bignumber(1), bignumber(6)]),
      [bignumber(7), bignumber(-4), bignumber(3)])
  })
})