/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import {animate, AnimationMetadata, style} from '@angular/animations';

import {
  AnimationStyleNormalizer,
  NoopAnimationStyleNormalizer,
} from '../../src/dsl/style_normalization/animation_style_normalizer';
import {AnimationDriver} from '../../src/render/animation_driver';
import {getBodyNode} from '../../src/render/shared';
import {TimelineAnimationEngine} from '../../src/render/timeline_animation_engine';
import {MockAnimationDriver, MockAnimationPlayer} from '../../testing/src/mock_animation_driver';

(function () {
  const defaultDriver = new MockAnimationDriver();

  function makeEngine(body: any, driver?: AnimationDriver, normalizer?: AnimationStyleNormalizer) {
    return new TimelineAnimationEngine(
      body,
      driver || defaultDriver,
      normalizer || new NoopAnimationStyleNormalizer(),
    );
  }

  // these tests are only meant to be run within the DOM
  if (isNode) return;

  describe('TimelineAnimationEngine', () => {
    let element: any;

    beforeEach(() => {
      MockAnimationDriver.log = [];
      element = document.createElement('div');
      document.body.appendChild(element);
    });

    afterEach(() => element.remove());

    it('should animate a timeline', () => {
      const engine = makeEngine(getBodyNode());
      const steps = [style({height: 100}), animate(1000, style({height: 0}))];
      expect(MockAnimationDriver.log.length).toEqual(0);
      invokeAnimation(engine, element, steps);
      expect(MockAnimationDriver.log.length).toEqual(1);
    });

    it('should not destroy timeline-based animations after they have finished', () => {
      const engine = makeEngine(getBodyNode());

      const log: string[] = [];
      function capture(value: string) {
        return () => {
          log.push(value);
        };
      }

      const steps = [style({height: 0}), animate(1000, style({height: 500}))];

      const player = invokeAnimation(engine, element, steps);
      player.onDone(capture('done'));
      player.onDestroy(capture('destroy'));
      expect(log).toEqual([]);

      player.finish();
      expect(log).toEqual(['done']);

      player.destroy();
      expect(log).toEqual(['done', 'destroy']);
    });

    it('should normalize the style values that are animateTransitioned within an a timeline animation', () => {
      const engine = makeEngine(getBodyNode(), defaultDriver, new SuffixNormalizer('-normalized'));

      const steps = [style({width: '333px'}), animate(1000, style({width: '999px'}))];

      const player = invokeAnimation(engine, element, steps) as MockAnimationPlayer;
      expect(player.keyframes).toEqual([
        new Map<string, string | number>([
          ['width-normalized', '333px-normalized'],
          ['offset', 0],
        ]),
        new Map<string, string | number>([
          ['width-normalized', '999px-normalized'],
          ['offset', 1],
        ]),
      ]);
    });

    it('should normalize `*` values', () => {
      const driver = new SuperMockDriver();
      const engine = makeEngine(getBodyNode(), driver);

      const steps = [style({width: '*'}), animate(1000, style({width: '999px'}))];
      const player = invokeAnimation(engine, element, steps) as MockAnimationPlayer;
      expect(player.keyframes).toEqual([
        new Map<string, string | number>([
          ['width', '*star*'],
          ['offset', 0],
        ]),
        new Map<string, string | number>([
          ['width', '999px'],
          ['offset', 1],
        ]),
      ]);
    });
  });
})();

function invokeAnimation(
  engine: TimelineAnimationEngine,
  element: any,
  steps: AnimationMetadata | AnimationMetadata[],
  id: string = 'id',
) {
  engine.register(id, steps);
  return engine.create(id, element);
}

class SuffixNormalizer extends AnimationStyleNormalizer {
  constructor(private _suffix: string) {
    super();
  }

  override normalizePropertyName(propertyName: string, errors: Error[]): string {
    return propertyName + this._suffix;
  }

  override normalizeStyleValue(
    userProvidedProperty: string,
    normalizedProperty: string,
    value: string | number,
    errors: Error[],
  ): string {
    return value + this._suffix;
  }
}

class SuperMockDriver extends MockAnimationDriver {
  override computeStyle(element: any, prop: string, defaultValue?: string): string {
    return '*star*';
  }
}
