// @ts-nocheck
/**
 * Copyright (c) Nicolas Gallagher.
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow
 */

import React from 'react'
import {
  Platform,
  StyleSheet,
  TextInputState,
  UIManager,
  dismissKeyboard,
  invariant,
  mergeRefs,
  warning,
} from '@tamagui/react-native-web-internals'

import { Dimensions } from '../Dimensions/index'
import { View } from '../View/index'
import { ScrollViewBase } from './ScrollViewBase'

const emptyObject = {} as any
const IS_ANIMATING_TOUCH_START_THRESHOLD_MS = 16

type Event = object

class ScrollView extends React.Component<any> {
  _scrollNodeRef: any
  _innerViewRef: any

  keyboardWillOpenTo: any = null
  additionalScrollOffset = 0
  preventNegativeScrollOffset = false
  isTouching = false
  lastMomentumScrollBeginTime = 0
  lastMomentumScrollEndTime = 0

  // Reset to false every time becomes responder. This is used to:
  // - Determine if the scroll view has been scrolled and therefore should
  // refuse to give up its responder lock.
  // - Determine if releasing should dismiss the keyboard when we are in
  // tap-to-dismiss mode (!this.props.keyboardShouldPersistTaps).
  observedScrollSinceBecomingResponder = false
  becameResponderWhileAnimating = false

  /**
   * Returns a reference to the underlying scroll responder, which supports
   * operations like `scrollTo`. All ScrollView-like components should
   * implement this method so that they can be composed while providing access
   * to the underlying scroll responder's methods.
   */
  getScrollResponder() {
    return this
  }

  getScrollableNode() {
    return this._scrollNodeRef
  }

  getInnerViewRef() {
    return this._innerViewRef
  }

  getInnerViewNode() {
    return this._innerViewRef
  }

  getNativeScrollRef() {
    return this._scrollNodeRef
  }

  flashScrollIndicators = () => {
    this.scrollResponderFlashScrollIndicators()
  }

  /**
   * Scrolls to a given x, y offset, either immediately or with a smooth animation.
   * Syntax:
   *
   * scrollTo(options: {x: number = 0; y: number = 0; animated: boolean = true})
   *
   * Note: The weird argument signature is due to the fact that, for historical reasons,
   * the function also accepts separate arguments as as alternative to the options object.
   * This is deprecated due to ambiguity (y before x), and SHOULD NOT BE USED.
   */
  scrollTo = (
    y?: number | { x?: number; y?: number; animated?: boolean },
    x?: number,
    animated?: boolean
  ) => {
    if (typeof y === 'number') {
      console.warn(
        '`scrollTo(y, x, animated)` is deprecated. Use `scrollTo({x: 5, y: 5, animated: true})` instead.'
      )
    } else {
      ;({ x, y, animated } = y || emptyObject)
    }

    this.scrollResponderScrollTo({
      x: x || 0,
      y: y || 0,
      animated: animated !== false,
    })
  }

  /**
   * If this is a vertical ScrollView scrolls to the bottom.
   * If this is a horizontal ScrollView scrolls to the right.
   *
   * Use `scrollToEnd({ animated: true })` for smooth animated scrolling,
   * `scrollToEnd({ animated: false })` for immediate scrolling.
   * If no options are passed, `animated` defaults to true.
   */
  scrollToEnd = (options?: { animated?: boolean }) => {
    // Default to true
    const animated = (options && options.animated) !== false
    const { horizontal } = this.props
    const scrollResponderNode = this.getScrollableNode()
    const x = horizontal ? scrollResponderNode.scrollWidth : 0
    const y = horizontal ? 0 : scrollResponderNode.scrollHeight
    this.scrollResponderScrollTo({ x, y, animated })
  }

  render() {
    const {
      contentContainerStyle,
      horizontal,
      onContentSizeChange,
      refreshControl,
      stickyHeaderIndices,
      pagingEnabled,
      /* eslint-disable */
      forwardedRef,
      keyboardDismissMode,
      onScroll,
      centerContent,
      // strip RN-only props that shouldn't reach the DOM
      contentOffset,
      contentInset,
      contentInsetAdjustmentBehavior,
      decelerationRate,
      directionalLockEnabled,
      disableIntervalMomentum,
      disableScrollViewPanResponder,
      endFillColor,
      fadingEdgeLength,
      indicatorStyle,
      invertStickyHeaders,
      keyboardShouldPersistTaps,
      maintainVisibleContentPosition,
      maximumZoomScale,
      minimumZoomScale,
      nestedScrollEnabled,
      onScrollToTop,
      overScrollMode,
      pinchGestureEnabled,
      removeClippedSubviews,
      scrollIndicatorInsets,
      scrollPerfTag,
      scrollToOverflowEnabled,
      snapToAlignment,
      snapToEnd,
      snapToInterval,
      snapToOffsets,
      snapToStart,
      StickyHeaderComponent,
      ScrollComponent,
      /* eslint-enable */
      ...other
    } = this.props

    if (process.env.NODE_ENV !== 'production' && this.props.style) {
      const style = StyleSheet.flatten(this.props.style)
      const childLayoutProps = ['alignItems', 'justifyContent'].filter(
        (prop) => style && style[prop] !== undefined
      )
      invariant(
        childLayoutProps.length === 0,
        `ScrollView child layout (${JSON.stringify(childLayoutProps)}) ` +
          'must be applied through the contentContainerStyle prop.'
      )
    }

    let contentSizeChangeProps = {}
    if (onContentSizeChange) {
      contentSizeChangeProps = {
        onLayout: this._handleContentOnLayout.bind(this),
      }
    }

    const hasStickyHeaderIndices = !horizontal && Array.isArray(stickyHeaderIndices)
    const children =
      hasStickyHeaderIndices || pagingEnabled
        ? React.Children.map(this.props.children, (child, i) => {
            const isSticky = hasStickyHeaderIndices && stickyHeaderIndices.indexOf(i) > -1
            if (child != null && (isSticky || pagingEnabled)) {
              return (
                <View
                  style={StyleSheet.compose(
                    isSticky && styles.stickyHeader,
                    pagingEnabled && styles.pagingEnabledChild
                  )}
                >
                  {child}
                </View>
              )
            } else {
              return child
            }
          })
        : this.props.children

    const contentContainer = (
      <View
        {...contentSizeChangeProps}
        // @ts-ignore
        collapsable={false}
        ref={this._setInnerViewRef.bind(this)}
        style={[
          horizontal && styles.contentContainerHorizontal,
          centerContent && styles.contentContainerCenterContent,
          contentContainerStyle,
        ]}
      >
        {children}
      </View>
    )

    const baseStyle = horizontal ? styles.baseHorizontal : styles.baseVertical
    const pagingEnabledStyle = horizontal
      ? styles.pagingEnabledHorizontal
      : styles.pagingEnabledVertical

    const props = {
      ...other,
      style: [baseStyle, pagingEnabled && pagingEnabledStyle, this.props.style],
      onTouchStart: this.scrollResponderHandleTouchStart.bind(this),
      onTouchMove: this.scrollResponderHandleTouchMove.bind(this),
      onTouchEnd: this.scrollResponderHandleTouchEnd.bind(this),
      onScrollBeginDrag: this.scrollResponderHandleScrollBeginDrag.bind(this),
      onScrollEndDrag: this.scrollResponderHandleScrollEndDrag.bind(this),
      onMomentumScrollBegin: this.scrollResponderHandleMomentumScrollBegin.bind(this),
      onMomentumScrollEnd: this.scrollResponderHandleMomentumScrollEnd.bind(this),
      onStartShouldSetResponder:
        this.scrollResponderHandleStartShouldSetResponder.bind(this),
      onStartShouldSetResponderCapture:
        this.scrollResponderHandleStartShouldSetResponderCapture.bind(this),
      onScrollShouldSetResponder:
        this.scrollResponderHandleScrollShouldSetResponder.bind(this),
      onScroll: this._handleScroll.bind(this),
      onResponderGrant: this.scrollResponderHandleResponderGrant.bind(this),
      onResponderTerminationRequest:
        this.scrollResponderHandleTerminationRequest.bind(this),
      onResponderRelease: this.scrollResponderHandleResponderRelease.bind(this),
      onResponderReject: this.scrollResponderHandleResponderReject.bind(this),
      onResponderTerminate: this.scrollResponderHandleTerminate.bind(this),
    }

    const ScrollViewClass = ScrollViewBase

    invariant(ScrollViewClass !== undefined, 'ScrollViewClass must not be undefined')

    const scrollView = (
      <ScrollViewClass {...props} ref={this._setScrollNodeRef.bind(this)}>
        {contentContainer}
      </ScrollViewClass>
    )

    if (refreshControl) {
      return React.cloneElement(refreshControl, { style: props.style }, scrollView)
    }

    return scrollView
  }

  _handleContentOnLayout(e: any) {
    const { width, height } = e.nativeEvent.layout
    this.props.onContentSizeChange?.(width, height)
  }

  _handleScroll(e: object) {
    if (process.env.NODE_ENV !== 'production') {
      if (this.props.onScroll && this.props.scrollEventThrottle == null) {
        console.info(
          'You specified `onScroll` on a <ScrollView> but not ' +
            '`scrollEventThrottle`. You will only receive one event. ' +
            'Using `16` you get all the events but be aware that it may ' +
            "cause frame drops, use a bigger number if you don't need as " +
            'much precision.'
        )
      }
    }

    if (this.props.keyboardDismissMode === 'on-drag') {
      dismissKeyboard()
    }

    this.scrollResponderHandleScroll(e)
  }

  _setInnerViewRef(node) {
    this._innerViewRef = node
  }

  _setScrollNodeRef(node) {
    this._scrollNodeRef = node
    // ScrollView needs to add more methods to the hostNode in addition to those
    // added by `usePlatformMethods`. This is temporarily until an API like
    // `ScrollView.scrollTo(hostNode, { x, y })` is added to React Native.
    if (node != null) {
      node.getScrollResponder = this.getScrollResponder
      node.getInnerViewNode = this.getInnerViewNode
      node.getInnerViewRef = this.getInnerViewRef
      node.getNativeScrollRef = this.getNativeScrollRef
      node.getScrollableNode = this.getScrollableNode
      node.scrollTo = this.scrollTo
      node.scrollToEnd = this.scrollToEnd
      node.flashScrollIndicators = this.flashScrollIndicators
      node.scrollResponderZoomTo = this.scrollResponderZoomTo
      node.scrollResponderScrollNativeHandleToKeyboard =
        this.scrollResponderScrollNativeHandleToKeyboard
    }
    const ref = mergeRefs(this.props.forwardedRef)
    ref(node)
  }

  /**
   * Invoke this from an `onScroll` event.
   */
  scrollResponderHandleScrollShouldSetResponder(): boolean {
    return this.isTouching
  }

  /**
   * Merely touch starting is not sufficient for a scroll view to become the
   * responder. Being the "responder" means that the very next touch move/end
   * event will result in an action/movement.
   *
   * Invoke this from an `onStartShouldSetResponder` event.
   *
   * `onStartShouldSetResponder` is used when the next move/end will trigger
   * some UI movement/action, but when you want to yield priority to views
   * nested inside of the view.
   *
   * There may be some cases where scroll views actually should return `true`
   * from `onStartShouldSetResponder`: Any time we are detecting a standard tap
   * that gives priority to nested views.
   *
   * - If a single tap on the scroll view triggers an action such as
   *   recentering a map style view yet wants to give priority to interaction
   *   views inside (such as dropped pins or labels), then we would return true
   *   from this method when there is a single touch.
   *
   * - Similar to the previous case, if a two finger "tap" should trigger a
   *   zoom, we would check the `touches` count, and if `>= 2`, we would return
   *   true.
   *
   */
  scrollResponderHandleStartShouldSetResponder(): boolean {
    return false
  }

  /**
   * There are times when the scroll view wants to become the responder
   * (meaning respond to the next immediate `touchStart/touchEnd`), in a way
   * that *doesn't* give priority to nested views (hence the capture phase):
   *
   * - Currently animating.
   * - Tapping anywhere that is not the focused input, while the keyboard is
   *   up (which should dismiss the keyboard).
   *
   * Invoke this from an `onStartShouldSetResponderCapture` event.
   */
  scrollResponderHandleStartShouldSetResponderCapture(e: Event): boolean {
    // First see if we want to eat taps while the keyboard is up
    // var currentlyFocusedTextInput = TextInputState.currentlyFocusedField();
    // if (!this.props.keyboardShouldPersistTaps &&
    //   currentlyFocusedTextInput != null &&
    //   e.target !== currentlyFocusedTextInput) {
    //   return true;
    // }
    return this.scrollResponderIsAnimating()
  }

  /**
   * Invoke this from an `onResponderReject` event.
   *
   * Some other element is not yielding its role as responder. Normally, we'd
   * just disable the `UIScrollView`, but a touch has already began on it, the
   * `UIScrollView` will not accept being disabled after that. The easiest
   * solution for now is to accept the limitation of disallowing this
   * altogether. To improve this, find a way to disable the `UIScrollView` after
   * a touch has already started.
   */
  scrollResponderHandleResponderReject() {
    warning(false, "ScrollView doesn't take rejection well - scrolls anyway")
  }

  /**
   * We will allow the scroll view to give up its lock iff it acquired the lock
   * during an animation. This is a very useful default that happens to satisfy
   * many common user experiences.
   *
   * - Stop a scroll on the left edge, then turn that into an outer view's
   *   backswipe.
   * - Stop a scroll mid-bounce at the top, continue pulling to have the outer
   *   view dismiss.
   * - However, without catching the scroll view mid-bounce (while it is
   *   motionless), if you drag far enough for the scroll view to become
   *   responder (and therefore drag the scroll view a bit), any backswipe
   *   navigation of a swipe gesture higher in the view hierarchy, should be
   *   rejected.
   */
  scrollResponderHandleTerminationRequest(): boolean {
    return !this.observedScrollSinceBecomingResponder
  }

  /**
   * Invoke this from an `onTouchEnd` event.
   *
   * @param {SyntheticEvent} e Event.
   */
  scrollResponderHandleTouchEnd(e: Event) {
    const nativeEvent = e.nativeEvent
    this.isTouching = nativeEvent.touches.length !== 0
    this.props.onTouchEnd && this.props.onTouchEnd(e)
  }

  /**
   * Invoke this from an `onResponderRelease` event.
   */
  scrollResponderHandleResponderRelease(e: Event) {
    this.props.onResponderRelease && this.props.onResponderRelease(e)

    // By default scroll views will unfocus a textField
    // if another touch occurs outside of it
    const currentlyFocusedTextInput = TextInputState.currentlyFocusedField()
    if (
      !this.props.keyboardShouldPersistTaps &&
      currentlyFocusedTextInput != null &&
      e.target !== currentlyFocusedTextInput &&
      !this.observedScrollSinceBecomingResponder &&
      !this.becameResponderWhileAnimating
    ) {
      this.props.onScrollResponderKeyboardDismissed &&
        this.props.onScrollResponderKeyboardDismissed(e)
      TextInputState.blurTextInput(currentlyFocusedTextInput)
    }
  }

  scrollResponderHandleScroll(e: Event) {
    this.observedScrollSinceBecomingResponder = true
    this.props.onScroll && this.props.onScroll(e)
  }

  /**
   * Invoke this from an `onResponderGrant` event.
   */
  scrollResponderHandleResponderGrant(e: Event) {
    this.observedScrollSinceBecomingResponder = false
    this.props.onResponderGrant && this.props.onResponderGrant(e)
    this.becameResponderWhileAnimating = this.scrollResponderIsAnimating()
  }

  /**
   * Unfortunately, `onScrollBeginDrag` also fires when *stopping* the scroll
   * animation, and there's not an easy way to distinguish a drag vs. stopping
   * momentum.
   *
   * Invoke this from an `onScrollBeginDrag` event.
   */
  scrollResponderHandleScrollBeginDrag(e: Event) {
    this.props.onScrollBeginDrag && this.props.onScrollBeginDrag(e)
  }

  /**
   * Invoke this from an `onScrollEndDrag` event.
   */
  scrollResponderHandleScrollEndDrag(e: Event) {
    this.props.onScrollEndDrag && this.props.onScrollEndDrag(e)
  }

  /**
   * Invoke this from an `onMomentumScrollBegin` event.
   */
  scrollResponderHandleMomentumScrollBegin(e: Event) {
    this.lastMomentumScrollBeginTime = Date.now()
    this.props.onMomentumScrollBegin && this.props.onMomentumScrollBegin(e)
  }

  /**
   * Invoke this from an `onMomentumScrollEnd` event.
   */
  scrollResponderHandleMomentumScrollEnd(e: Event) {
    this.lastMomentumScrollEndTime = Date.now()
    this.props.onMomentumScrollEnd && this.props.onMomentumScrollEnd(e)
  }

  /**
   * Invoke this from an `onTouchStart` event.
   *
   * Since we know that the `SimpleEventPlugin` occurs later in the plugin
   * order, after `ResponderEventPlugin`, we can detect that we were *not*
   * permitted to be the responder (presumably because a contained view became
   * responder). The `onResponderReject` won't fire in that case - it only
   * fires when a *current* responder rejects our request.
   *
   * @param {SyntheticEvent} e Touch Start event.
   */
  scrollResponderHandleTouchStart(e: Event) {
    this.isTouching = true
    this.props.onTouchStart && this.props.onTouchStart(e)
  }

  /**
   * Invoke this from an `onTouchMove` event.
   *
   * Since we know that the `SimpleEventPlugin` occurs later in the plugin
   * order, after `ResponderEventPlugin`, we can detect that we were *not*
   * permitted to be the responder (presumably because a contained view became
   * responder). The `onResponderReject` won't fire in that case - it only
   * fires when a *current* responder rejects our request.
   *
   * @param {SyntheticEvent} e Touch Start event.
   */
  scrollResponderHandleTouchMove(e: Event) {
    this.props.onTouchMove && this.props.onTouchMove(e)
  }

  scrollResponderHandleTerminate(e: Event) {
    this.props.onResponderTerminate && this.props.onResponderTerminate(e)
  }

  /**
   * A helper function for this class that lets us quickly determine if the
   * view is currently animating. This is particularly useful to know when
   * a touch has just started or ended.
   */
  scrollResponderIsAnimating(): boolean {
    const now = Date.now()
    const timeSinceLastMomentumScrollEnd = now - this.lastMomentumScrollEndTime
    const isAnimating =
      timeSinceLastMomentumScrollEnd < IS_ANIMATING_TOUCH_START_THRESHOLD_MS ||
      this.lastMomentumScrollEndTime < this.lastMomentumScrollBeginTime
    return isAnimating
  }

  /**
   * A helper function to scroll to a specific point in the scrollview.
   * This is currently used to help focus on child textviews, but can also
   * be used to quickly scroll to any element we want to focus. Syntax:
   *
   * scrollResponderScrollTo(options: {x: number = 0; y: number = 0; animated: boolean = true})
   *
   * Note: The weird argument signature is due to the fact that, for historical reasons,
   * the function also accepts separate arguments as as alternative to the options object.
   * This is deprecated due to ambiguity (y before x), and SHOULD NOT BE USED.
   */
  scrollResponderScrollTo = (
    x?: number | { x?: number; y?: number; animated?: boolean },
    y?: number,
    animated?: boolean
  ) => {
    if (typeof x === 'number') {
      console.warn(
        '`scrollResponderScrollTo(x, y, animated)` is deprecated. Use `scrollResponderScrollTo({x: 5, y: 5, animated: true})` instead.'
      )
    } else {
      ;({ x, y, animated } = x || emptyObject)
    }
    const node = this.getScrollableNode()
    const left = x || 0
    const top = y || 0
    if (node != null) {
      if (typeof node.scroll === 'function') {
        node.scroll({ top, left, behavior: !animated ? 'auto' : 'smooth' })
      } else {
        node.scrollLeft = left
        node.scrollTop = top
      }
    }
  }

  /**
   * A helper function to zoom to a specific rect in the scrollview. The argument has the shape
   * {x: number; y: number; width: number; height: number; animated: boolean = true}
   *
   * @platform ios
   */
  scrollResponderZoomTo = (
    rect: {
      x: number
      y: number
      width: number
      height: number
      animated?: boolean
    },
    animated?: boolean // deprecated, put this inside the rect argument instead
  ) => {
    if (Platform.OS !== 'ios') {
      invariant('zoomToRect is not implemented')
    }
  }

  /**
   * Displays the scroll indicators momentarily.
   */
  scrollResponderFlashScrollIndicators() {}

  /**
   * This method should be used as the callback to onFocus in a TextInputs'
   * parent view. Note that any module using this mixin needs to return
   * the parent view's ref in getScrollViewRef() in order to use this method.
   * @param {any} nodeHandle The TextInput node handle
   * @param {number} additionalOffset The scroll view's top "contentInset".
   *        Default is 0.
   * @param {bool} preventNegativeScrolling Whether to allow pulling the content
   *        down to make it meet the keyboard's top. Default is false.
   */
  scrollResponderScrollNativeHandleToKeyboard = (
    nodeHandle: any,
    additionalOffset?: number,
    preventNegativeScrollOffset?: boolean
  ) => {
    this.additionalScrollOffset = additionalOffset || 0
    this.preventNegativeScrollOffset = !!preventNegativeScrollOffset
    UIManager.measureLayout(
      nodeHandle,
      this.getInnerViewNode(),
      this.scrollResponderTextInputFocusError,
      this.scrollResponderInputMeasureAndScrollToKeyboard
    )
  }

  /**
   * The calculations performed here assume the scroll view takes up the entire
   * screen - even if has some content inset. We then measure the offsets of the
   * keyboard, and compensate both for the scroll view's "contentInset".
   *
   * @param {number} left Position of input w.r.t. table view.
   * @param {number} top Position of input w.r.t. table view.
   * @param {number} width Width of the text input.
   * @param {number} height Height of the text input.
   */
  scrollResponderInputMeasureAndScrollToKeyboard = (
    left: number,
    top: number,
    width: number,
    height: number
  ) => {
    let keyboardScreenY = Dimensions.get('window').height
    if (this.keyboardWillOpenTo) {
      keyboardScreenY = this.keyboardWillOpenTo.endCoordinates.screenY
    }
    let scrollOffsetY = top - keyboardScreenY + height + this.additionalScrollOffset

    // By default, this can scroll with negative offset, pulling the content
    // down so that the target component's bottom meets the keyboard's top.
    // If requested otherwise, cap the offset at 0 minimum to avoid content
    // shifting down.
    if (this.preventNegativeScrollOffset) {
      scrollOffsetY = Math.max(0, scrollOffsetY)
    }
    this.scrollResponderScrollTo({ x: 0, y: scrollOffsetY, animated: true })

    this.additionalScrollOffset = 0
    this.preventNegativeScrollOffset = false
  }

  scrollResponderTextInputFocusError(e: Event) {
    console.error('Error measuring text field: ', e)
  }

  /**
   * Warning, this may be called several times for a single keyboard opening.
   * It's best to store the information in this method and then take any action
   * at a later point (either in `keyboardDidShow` or other).
   *
   * Here's the order that events occur in:
   * - focus
   * - willShow {startCoordinates, endCoordinates} several times
   * - didShow several times
   * - blur
   * - willHide {startCoordinates, endCoordinates} several times
   * - didHide several times
   *
   * The `ScrollResponder` providesModule callbacks for each of these events.
   * Even though any user could have easily listened to keyboard events
   * themselves, using these `props` callbacks ensures that ordering of events
   * is consistent - and not dependent on the order that the keyboard events are
   * subscribed to. This matters when telling the scroll view to scroll to where
   * the keyboard is headed - the scroll responder better have been notified of
   * the keyboard destination before being instructed to scroll to where the
   * keyboard will be. Stick to the `ScrollResponder` callbacks, and everything
   * will work.
   *
   * WARNING: These callbacks will fire even if a keyboard is displayed in a
   * different navigation pane. Filter out the events to determine if they are
   * relevant to you. (For example, only if you receive these callbacks after
   * you had explicitly focused a node etc).
   */
  scrollResponderKeyboardWillShow = (e: Event) => {
    this.keyboardWillOpenTo = e
    this.props.onKeyboardWillShow && this.props.onKeyboardWillShow(e)
  }

  scrollResponderKeyboardWillHide = (e: Event) => {
    this.keyboardWillOpenTo = null
    this.props.onKeyboardWillHide && this.props.onKeyboardWillHide(e)
  }

  scrollResponderKeyboardDidShow = (e: Event) => {
    // TODO(7693961): The event for DidShow is not available on iOS yet.
    // Use the one from WillShow and do not assign.
    if (e) {
      this.keyboardWillOpenTo = e
    }
    this.props.onKeyboardDidShow && this.props.onKeyboardDidShow(e)
  }

  scrollResponderKeyboardDidHide = (e: Event) => {
    this.keyboardWillOpenTo = null
    this.props.onKeyboardDidHide && this.props.onKeyboardDidHide(e)
  }
}

const commonStyle = {
  flexGrow: 1,
  flexShrink: 1,
  // Enable hardware compositing in modern browsers.
  // Creates a new layer with its own backing surface that can significantly
  // improve scroll performance.
  transform: [{ translateZ: 0 }],
  // iOS native scrolling
  WebkitOverflowScrolling: 'touch',
}

const styles = {
  baseVertical: {
    ...commonStyle,
    flexDirection: 'column',
    overflowX: 'hidden',
    overflowY: 'auto',
  },
  baseHorizontal: {
    ...commonStyle,
    flexDirection: 'row',
    overflowX: 'auto',
    overflowY: 'hidden',
  },
  contentContainerHorizontal: {
    flexDirection: 'row',
  },
  contentContainerCenterContent: {
    justifyContent: 'center',
    flexGrow: 1,
  },
  stickyHeader: {
    position: 'sticky',
    top: 0,
    zIndex: 10,
  },
  pagingEnabledHorizontal: {
    scrollSnapType: 'x mandatory',
  },
  pagingEnabledVertical: {
    scrollSnapType: 'y mandatory',
  },
  pagingEnabledChild: {
    scrollSnapAlign: 'start',
  },
}

export interface ScrollViewMethods {
  getScrollResponder: () => ScrollView
  getScrollableNode: () => HTMLElement
  getInnerViewNode: () => HTMLElement
  getInnerViewRef: () => HTMLElement
  getNativeScrollRef: () => HTMLElement
  scrollTo: (options?: { x?: number; y?: number; animated?: boolean }) => void
  scrollToEnd: (options?: { animated?: boolean }) => void
  flashScrollIndicators: () => void
  scrollResponderZoomTo: (rect: {
    x: number
    y: number
    width: number
    height: number
    animated?: boolean
  }) => void
  scrollResponderScrollNativeHandleToKeyboard: (
    nodeHandle: any,
    additionalOffset?: number,
    preventNegativeScrollOffset?: boolean
  ) => void
}

export type ScrollViewRef = HTMLElement & ScrollViewMethods

const ForwardedScrollView = React.forwardRef<ScrollViewRef, any>(
  (props, forwardedRef) => {
    return <ScrollView {...props} forwardedRef={forwardedRef} />
  }
)

ForwardedScrollView.displayName = 'ScrollView'

export { ForwardedScrollView as ScrollView }
export default ForwardedScrollView

/**
 * Mixin that can be integrated in order to handle scrolling that plays well
 * with `ResponderEventPlugin`. Integrate with your platform specific scroll
 * views, or even your custom built (every-frame animating) scroll views so that
 * all of these systems play well with the `ResponderEventPlugin`.
 *
 * iOS scroll event timing nuances:
 * ===============================
 *
 *
 * Scrolling without bouncing, if you touch down:
 * -------------------------------
 *
 * 1. `onMomentumScrollBegin` (when animation begins after letting up)
 *    ... physical touch starts ...
 * 2. `onTouchStartCapture`   (when you press down to stop the scroll)
 * 3. `onTouchStart`          (same, but bubble phase)
 * 4. `onResponderRelease`    (when lifting up - you could pause forever before * lifting)
 * 5. `onMomentumScrollEnd`
 *
 *
 * Scrolling with bouncing, if you touch down:
 * -------------------------------
 *
 * 1. `onMomentumScrollBegin` (when animation begins after letting up)
 *    ... bounce begins ...
 *    ... some time elapses ...
 *    ... physical touch during bounce ...
 * 2. `onMomentumScrollEnd`   (Makes no sense why this occurs first during bounce)
 * 3. `onTouchStartCapture`   (immediately after `onMomentumScrollEnd`)
 * 4. `onTouchStart`          (same, but bubble phase)
 * 5. `onTouchEnd`            (You could hold the touch start for a long time)
 * 6. `onMomentumScrollBegin` (When releasing the view starts bouncing back)
 *
 * So when we receive an `onTouchStart`, how can we tell if we are touching
 * *during* an animation (which then causes the animation to stop)? The only way
 * to tell is if the `touchStart` occurred immediately after the
 * `onMomentumScrollEnd`.
 *
 * This is abstracted out for you, so you can just call this.scrollResponderIsAnimating() if
 * necessary
 *
 * `ScrollResponder` also includes logic for blurring a currently focused input
 * if one is focused while scrolling. The `ScrollResponder` is a natural place
 * to put this logic since it can support not dismissing the keyboard while
 * scrolling, unless a recognized "tap"-like gesture has occurred.
 *
 * The public lifecycle API includes events for keyboard interaction, responder
 * interaction, and scrolling (among others). The keyboard callbacks
 * `onKeyboardWill/Did/*` are *global* events, but are invoked on scroll
 * responder's props so that you can guarantee that the scroll responder's
 * internal state has been updated accordingly (and deterministically) by
 * the time the props callbacks are invoke. Otherwise, you would always wonder
 * if the scroll responder is currently in a state where it recognizes new
 * keyboard positions etc. If coordinating scrolling with keyboard movement,
 * *always* use these hooks instead of listening to your own global keyboard
 * events.
 *
 * Public keyboard lifecycle API: (props callbacks)
 *
 * Standard Keyboard Appearance Sequence:
 *
 *   this.props.onKeyboardWillShow
 *   this.props.onKeyboardDidShow
 *
 * `onScrollResponderKeyboardDismissed` will be invoked if an appropriate
 * tap inside the scroll responder's scrollable region was responsible
 * for the dismissal of the keyboard. There are other reasons why the
 * keyboard could be dismissed.
 *
 *   this.props.onScrollResponderKeyboardDismissed
 *
 * Standard Keyboard Hide Sequence:
 *
 *   this.props.onKeyboardWillHide
 *   this.props.onKeyboardDidHide
 */