import { find, render, settled, triggerEvent, waitUntil } from '@ember/test-helpers';
import { module, test } from 'qunit';
import { setupRenderingTest } from 'ember-qunit';
import hbs from 'htmlbars-inline-precompile';
import { componentA11yAudit } from 'nomad-ui/tests/helpers/a11y-audit';
import sinon from 'sinon';
import { create } from 'ember-cli-page-object';
import stepperInput from 'nomad-ui/tests/pages/components/stepper-input';

const StepperInput = create(stepperInput());
const valueChange = () => {
  const initial = StepperInput.input.value;
  return () => StepperInput.input.value !== initial;
};

module('Integration | Component | stepper input', function(hooks) {
  setupRenderingTest(hooks);

  const commonProperties = () => ({
    min: 0,
    max: 10,
    value: 5,
    label: 'Stepper',
    classVariant: 'is-primary',
    disabled: false,
    onChange: sinon.spy(),
  });

  const commonTemplate = hbs`
    <StepperInput
      @debounce=50
      @min={{min}}
      @max={{max}}
      @value={{value}}
      @class={{classVariant}}
      @disabled={{disabled}}
      @onChange={{onChange}}>
      {{label}}
    </StepperInput>
  `;

  test('basic appearance includes a label, an input, and two buttons', async function(assert) {
    this.setProperties(commonProperties());

    await render(commonTemplate);

    assert.equal(StepperInput.label, this.label);
    assert.equal(StepperInput.input.value, this.value);
    assert.ok(StepperInput.decrement.isPresent);
    assert.ok(StepperInput.increment.isPresent);
    assert.ok(StepperInput.decrement.classNames.split(' ').includes(this.classVariant));
    assert.ok(StepperInput.increment.classNames.split(' ').includes(this.classVariant));

    await componentA11yAudit(this.element, assert);
  });

  test('clicking the increment and decrement buttons immediately changes the shown value in the input but debounces the onUpdate call', async function(assert) {
    this.setProperties(commonProperties());

    const baseValue = this.value;

    await render(commonTemplate);

    StepperInput.increment.click();
    await waitUntil(valueChange());
    assert.equal(StepperInput.input.value, baseValue + 1);
    assert.notOk(this.onChange.called);

    StepperInput.decrement.click();
    await waitUntil(valueChange());
    assert.equal(StepperInput.input.value, baseValue);
    assert.notOk(this.onChange.called);

    StepperInput.decrement.click();
    await waitUntil(valueChange());
    assert.equal(StepperInput.input.value, baseValue - 1);
    assert.notOk(this.onChange.called);

    await settled();
    assert.ok(this.onChange.calledWith(baseValue - 1));
  });

  test('the increment button is disabled when the internal value is the max value', async function(assert) {
    this.setProperties(commonProperties());
    this.set('value', this.max);

    await render(commonTemplate);

    assert.ok(StepperInput.increment.isDisabled);
  });

  test('the decrement button is disabled when the internal value is the min value', async function(assert) {
    this.setProperties(commonProperties());
    this.set('value', this.min);

    await render(commonTemplate);

    assert.ok(StepperInput.decrement.isDisabled);
  });

  test('the text input does not call the onUpdate function on oninput', async function(assert) {
    this.setProperties(commonProperties());
    const newValue = 8;

    await render(commonTemplate);

    const input = find('[data-test-stepper-input]');

    input.value = newValue;
    assert.equal(StepperInput.input.value, newValue);
    assert.notOk(this.onChange.called);

    await triggerEvent(input, 'input');
    assert.equal(StepperInput.input.value, newValue);
    assert.notOk(this.onChange.called);

    await triggerEvent(input, 'change');
    assert.equal(StepperInput.input.value, newValue);
    assert.ok(this.onChange.calledWith(newValue));
  });

  test('the text input does call the onUpdate function on onchange', async function(assert) {
    this.setProperties(commonProperties());
    const newValue = 8;

    await render(commonTemplate);

    await StepperInput.input.fill(newValue);

    await settled();
    assert.equal(StepperInput.input.value, newValue);
    assert.ok(this.onChange.calledWith(newValue));
  });

  test('text input limits input to the bounds of the min/max range', async function(assert) {
    this.setProperties(commonProperties());
    let newValue = this.max + 1;

    await render(commonTemplate);

    await StepperInput.input.fill(newValue);
    await settled();

    assert.equal(StepperInput.input.value, this.max);
    assert.ok(this.onChange.calledWith(this.max));

    newValue = this.min - 1;

    await StepperInput.input.fill(newValue);
    await settled();

    assert.equal(StepperInput.input.value, this.min);
    assert.ok(this.onChange.calledWith(this.min));
  });

  test('pressing ESC in the text input reverts the text value back to the current value', async function(assert) {
    this.setProperties(commonProperties());
    const newValue = 8;

    await render(commonTemplate);

    const input = find('[data-test-stepper-input]');

    input.value = newValue;
    assert.equal(StepperInput.input.value, newValue);

    await StepperInput.input.esc();
    assert.equal(StepperInput.input.value, this.value);
  });

  test('clicking the label focuses in the input', async function(assert) {
    this.setProperties(commonProperties());

    await render(commonTemplate);
    await StepperInput.clickLabel();

    const input = find('[data-test-stepper-input]');
    assert.equal(document.activeElement, input);
  });

  test('focusing the input selects the input value', async function(assert) {
    this.setProperties(commonProperties());

    await render(commonTemplate);
    await StepperInput.input.focus();

    assert.equal(
      window
        .getSelection()
        .toString()
        .trim(),
      this.value.toString()
    );
  });

  test('entering a fractional value floors the value', async function(assert) {
    this.setProperties(commonProperties());
    const newValue = 3.14159;

    await render(commonTemplate);

    await StepperInput.input.fill(newValue);

    await settled();
    assert.equal(StepperInput.input.value, Math.floor(newValue));
    assert.ok(this.onChange.calledWith(Math.floor(newValue)));
  });

  test('entering an invalid value reverts the value', async function(assert) {
    this.setProperties(commonProperties());
    const newValue = 'NaN';

    await render(commonTemplate);

    await StepperInput.input.fill(newValue);

    await settled();
    assert.equal(StepperInput.input.value, this.value);
    assert.notOk(this.onChange.called);
  });
});