#![allow(bad_style)]
#![allow(clippy::float_cmp)]
#![allow(clippy::unreadable_literal)]

use hektor::*;

#[test]
fn Mat2_transpose() {
  assert!(Mat2::default().inverse().is_none());
  //
  let m = Mat2::from([4.0, 3.0, 6.0, 8.0]);
  assert!(m.determinant() != 0.0);
  let actual_arr: [f32; 4] = (m.inverse().unwrap() * m).into();
  let expected_arr: [f32; 4] = Mat2::diagonal(1.0, 1.0).into();
  // TODO(Lokathor): how do we approx good?
  actual_arr
    .iter()
    .zip(expected_arr.iter())
    .for_each(|(a, e)| assert!((*a - *e).abs() <= 0.000001, "a:{}, e:{}", *a, *e));
  //
  let actual_arr: [f32; 4] = (m * m.inverse().unwrap()).into();
  let expected_arr: [f32; 4] = Mat2::diagonal(1.0, 1.0).into();
  actual_arr
    .iter()
    .zip(expected_arr.iter())
    .for_each(|(a, e)| assert!((*a - *e).abs() <= 0.000001, "a:{}, e:{}", *a, *e));
}

#[test]
fn Mat3_transpose() {
  assert!(Mat3::default().inverse().is_none());
  //
  let m = Mat3::from([6.0, 4.0, 2.0, 1.0, -2.0, 8.0, 1.0, 5.0, 7.0]);
  assert!(m.determinant() != 0.0);
  let actual_arr: [f32; 9] = (m.inverse().unwrap() * m).into();
  let expected_arr: [f32; 9] = Mat3::diagonal(1.0, 1.0, 1.0).into();
  // TODO(Lokathor): how do we approx good?
  actual_arr
    .iter()
    .zip(expected_arr.iter())
    .for_each(|(a, e)| assert!((*a - *e).abs() <= 0.000001, "a:{}, e:{}", *a, *e));
  //
  let actual_arr: [f32; 9] = (m * m.inverse().unwrap()).into();
  let expected_arr: [f32; 9] = Mat3::diagonal(1.0, 1.0, 1.0).into();
  actual_arr
    .iter()
    .zip(expected_arr.iter())
    .for_each(|(a, e)| assert!((*a - *e).abs() <= 0.000001, "a:{}, e:{}", *a, *e));
}

#[test]
fn Mat4_transpose() {
  assert!(Mat4::default().inverse().is_none());
  //
  let m = Mat4::from([
    1.0, 2.0, 3.0, 4.0, -1.0, 10.0, 6.0, 5.0, 20.0, 12.0, -8.0, -2.0, 4.0, -5.0, 2.0, 3.0,
  ]);
  assert!(m.determinant() != 0.0);
  let actual_arr: [f32; 16] = (m.inverse().unwrap() * m).into();
  let expected_arr: [f32; 16] = Mat4::diagonal(1.0, 1.0, 1.0, 1.0).into();
  // TODO(Lokathor): how do we approx good?
  actual_arr
    .iter()
    .zip(expected_arr.iter())
    .for_each(|(a, e)| assert!((*a - *e).abs() <= 0.000001, "a:{}, e:{}", *a, *e));
  //
  let actual_arr: [f32; 16] = (m * m.inverse().unwrap()).into();
  let expected_arr: [f32; 16] = Mat4::diagonal(1.0, 1.0, 1.0, 1.0).into();
  actual_arr
    .iter()
    .zip(expected_arr.iter())
    .for_each(|(a, e)| assert!((*a - *e).abs() <= 0.000001, "a:{}, e:{}", *a, *e));
}