package com.swmansion.gesturehandler.react

import android.view.View
import android.view.ViewGroup
import com.facebook.react.uimanager.PointerEvents
import com.facebook.react.uimanager.ReactPointerEventsView
import com.facebook.react.views.scroll.ReactHorizontalScrollView
import com.facebook.react.views.scroll.ReactScrollView
import com.facebook.react.views.view.ReactViewGroup
import com.swmansion.gesturehandler.core.PointerEventsConfig
import com.swmansion.gesturehandler.core.ViewConfigurationHelper

class RNViewConfigurationHelper : ViewConfigurationHelper {
  override fun getPointerEventsConfigForView(view: View): PointerEventsConfig {
    val pointerEvents: PointerEvents =
      if (view is ReactPointerEventsView) {
        (view as ReactPointerEventsView).pointerEvents
      } else {
        PointerEvents.AUTO
      }

    // Views that are disabled should never be the target of pointer events. However, their children
    // can be because some views (SwipeRefreshLayout) use enabled but still have children that can
    // be valid targets.
    if (!view.isEnabled) {
      if (pointerEvents == PointerEvents.AUTO) {
        return PointerEventsConfig.BOX_NONE
      } else if (pointerEvents == PointerEvents.BOX_ONLY) {
        return PointerEventsConfig.NONE
      }
    }

    return when (pointerEvents) {
      PointerEvents.BOX_ONLY -> PointerEventsConfig.BOX_ONLY
      PointerEvents.BOX_NONE -> PointerEventsConfig.BOX_NONE
      PointerEvents.NONE -> PointerEventsConfig.NONE
      PointerEvents.AUTO -> PointerEventsConfig.AUTO
    }
  }

  override fun getChildInDrawingOrderAtIndex(parent: ViewGroup, index: Int): View = if (parent is ReactViewGroup) {
    parent.getChildAt(parent.getZIndexMappedChildIndex(index))
  } else {
    parent.getChildAt(index)
  }

  override fun isViewClippingChildren(view: ViewGroup) = when {
    view.clipChildren -> true
    view is ReactScrollView -> view.overflow != "visible"
    view is ReactHorizontalScrollView -> view.overflow != "visible"
    view is ReactViewGroup -> view.overflow == "hidden"
    else -> false
  }
}