import { Fun } from '@ephox/katamari';
import Deltas from 'ephox/snooker/calc/Deltas';
import { UnitTest, assert } from '@ephox/bedrock';
import { TableSize } from 'ephox/snooker/resize/Types';

UnitTest.test('Deltas', function () {
  const min = 10;
  const check = function (expected: number[], input: number[], column: number, step: number) {
    const singleColumnWidth = function (width: number, _delta: number) {
      const newNext = Math.max(min, width + step);
      return [ newNext - width ];
    };
    const tableSize = {
      minCellWidth: Fun.constant(10),
      singleColumnWidth
    };
    const actual = Deltas.determine(input, column, step, tableSize as TableSize);
    assert.eq(expected, actual);
  };

  check([-20, 20, 0, 0], [100, 50, 250, 100], 0, -20);
  check([-90, 90, 0, 0], [100, 50, 250, 100], 0, -200);
  check([20, -20, 0, 0], [100, 50, 250, 100], 0, 20);
  check([80, -40, 0, 0], [100, 50, 250, 100], 0, 80);

  check([0, -30, 30, 0], [100, 50, 250, 100], 1, -30);
  check([0, -40, 40, 0], [100, 50, 250, 100], 1, -100);
  check([0, 30, -30, 0], [100, 50, 250, 100], 1, 30);
  check([0, 400, -240, 0], [100, 50, 250, 100], 1, 400);

  check([0, 0, -20, 20], [100, 50, 250, 100], 2, -20);
  check([0, 0, -240, 240], [100, 50, 250, 100], 2, -300);
  check([0, 0, 20, -20], [100, 50, 250, 100], 2, 20);
  check([0, 0, 150, -90], [100, 50, 250, 100], 2, 150);

  check([0, 0, 0, 50], [100, 50, 250, 100], 3, 50);
  check([0, 0, 0, 100], [100, 50, 250, 100], 3, 100);
  check([0, 0, 0, -50], [100, 50, 250, 100], 3, -50);
  check([0, 0, 0, -90], [100, 50, 250, 100], 3, -150);

  check([-70], [80], 0, -100);
  check([-100], [115], 0, -100);
  check([25], [25], 0, 25);

  check([], [], 0, 0);
  check([50, -50], [200, 200], 0, 50);
});