import Hammer from '@egjs/hammerjs';

import { State } from '../State';
import {
  CONTENT_TOUCHES_DELAY,
  CONTENT_TOUCHES_QUICK_TAP_END_DELAY,
  HammerInputNames,
} from './constants';
import DiscreteGestureHandler from './DiscreteGestureHandler';
import { Config, HammerInputExt } from './GestureHandler';
import { fireAfterInterval, isValidNumber, isnan } from './utils';

class PressGestureHandler extends DiscreteGestureHandler {
  private visualFeedbackTimer: any;
  private initialEvent: HammerInputExt | null = null;
  get name() {
    return 'press';
  }

  get minDurationMs() {
    // @ts-ignore FIXME(TS)
    return isnan(this.config.minDurationMs) ? 5 : this.config.minDurationMs;
  }

  get maxDist() {
    return isnan(this.config.maxDist) ? 9 : this.config.maxDist;
  }

  get NativeGestureClass() {
    return Hammer.Press;
  }

  shouldDelayTouches = true;

  simulateCancelEvent(inputData: HammerInputExt) {
    // Long press never starts so we can't rely on the running event boolean.
    this.hasGestureFailed = true;
    this.cancelEvent(inputData);
  }

  updateHasCustomActivationCriteria({
    shouldCancelWhenOutside,
    maxDistSq,
  }: Config & { shouldCancelWhenOutside: boolean }) {
    return shouldCancelWhenOutside || !isValidNumber(maxDistSq);
  }

  getState(type: keyof typeof HammerInputNames): State {
    return {
      [Hammer.INPUT_START]: State.BEGAN,
      [Hammer.INPUT_MOVE]: State.ACTIVE,
      [Hammer.INPUT_END]: State.END,
      [Hammer.INPUT_CANCEL]: State.CANCELLED,
    }[type];
  }

  getConfig() {
    if (!this.hasCustomActivationCriteria) {
      // Default config
      // If no params have been defined then this config should emulate the native gesture as closely as possible.
      return {
        shouldCancelWhenOutside: true,
        maxDistSq: 10,
      };
    }
    return this.config;
  }

  getHammerConfig() {
    return {
      ...super.getHammerConfig(),
      // threshold: this.maxDist,
      time: this.minDurationMs,
    };
  }

  onGestureActivated(ev: HammerInputExt) {
    this.onGestureStart(ev);
  }

  shouldDelayTouchForEvent({ pointerType }: HammerInputExt) {
    // Don't disable event for mouse input
    return this.shouldDelayTouches && pointerType === 'touch';
  }

  onGestureStart(ev: HammerInputExt) {
    this.isGestureRunning = true;
    clearTimeout(this.visualFeedbackTimer);
    this.initialEvent = ev;
    this.visualFeedbackTimer = fireAfterInterval(
      () => {
        this.sendGestureStartedEvent(this.initialEvent as HammerInputExt);
        this.initialEvent = null;
      },
      this.shouldDelayTouchForEvent(ev) && CONTENT_TOUCHES_DELAY
    );
  }

  sendGestureStartedEvent(ev: HammerInputExt) {
    clearTimeout(this.visualFeedbackTimer);
    this.visualFeedbackTimer = null;
    this.sendEvent({
      ...ev,
      eventType: Hammer.INPUT_MOVE,
      isFirst: true,
    });
  }

  forceInvalidate(event: HammerInputExt) {
    super.forceInvalidate(event);
    clearTimeout(this.visualFeedbackTimer);
    this.visualFeedbackTimer = null;
    this.initialEvent = null;
  }

  onRawEvent(ev: HammerInputExt) {
    super.onRawEvent(ev);
    if (this.isGestureRunning) {
      if (ev.isFinal) {
        let timeout;
        if (this.visualFeedbackTimer) {
          // Aesthetic timing for a quick tap.
          // We haven't activated the tap right away to emulate iOS `delaysContentTouches`
          // Now we must send the initial activation event and wait a set amount of time before firing the end event.
          timeout = CONTENT_TOUCHES_QUICK_TAP_END_DELAY;
          this.sendGestureStartedEvent(this.initialEvent as HammerInputExt);
          this.initialEvent = null;
        }
        fireAfterInterval(() => {
          this.sendEvent({
            ...ev,
            eventType: Hammer.INPUT_END,
            isFinal: true,
          });
          // @ts-ignore -- this should explicitly support undefined
          this.onGestureEnded();
        }, timeout);
      } else {
        this.sendEvent({
          ...ev,
          eventType: Hammer.INPUT_MOVE,
          isFinal: false,
        });
      }
    }
  }

  updateGestureConfig({
    shouldActivateOnStart = false,
    disallowInterruption = false,
    shouldCancelWhenOutside = true,
    minDurationMs = Number.NaN,
    maxDist = Number.NaN,
    minPointers = 1,
    maxPointers = 1,
    ...props
  }) {
    return super.updateGestureConfig({
      shouldActivateOnStart,
      disallowInterruption,
      shouldCancelWhenOutside,
      minDurationMs,
      maxDist,
      minPointers,
      maxPointers,
      ...props,
    });
  }
}
export default PressGestureHandler;