package com.swmansion.rnscreens.gamma.tabs.container

import android.annotation.SuppressLint
import android.content.Context
import androidx.core.view.isVisible
import com.facebook.react.uimanager.PointerEvents
import com.facebook.react.uimanager.ReactPointerEventsView
import com.google.android.material.bottomnavigation.BottomNavigationView

@SuppressLint("ViewConstructor") // Should not be restored & should only be constructed by us.
class CustomBottomNavigationView(
    context: Context,
    val container: TabsContainer,
) : BottomNavigationView(context),
    ReactPointerEventsView {
    private var actionOrigin: TabsActionOrigin? = null

    /**
     * The tab bar is hidden by setting its visibility to `GONE`. A `GONE` view is skipped by its
     * parent's layout pass, so it keeps the bounds it was last laid out with, and Android's own
     * touch dispatch ignores it (`ViewGroup.canViewReceivePointerEvents` requires `VISIBLE`).
     *
     * React Native does not go through Android's dispatch to pick a touch target - it runs its own
     * hit-test over the native view tree in `TouchTargetHelper`, which only checks bounds. The
     * retained bounds of the hidden bar therefore keep capturing every touch aimed at the content
     * laid out underneath it. Declaring [PointerEvents.NONE] while hidden is how a native view opts
     * out of that hit-test, which brings it back in line with Android's dispatch.
     *
     * See https://github.com/software-mansion/react-native-screens/issues/4132.
     */
    override val pointerEvents: PointerEvents
        get() = if (isVisible) PointerEvents.AUTO else PointerEvents.NONE

    internal fun setSelectedItemIdWithActionOrigin(
        itemId: Int,
        actionOrigin: TabsActionOrigin,
    ) {
        require(actionOrigin !== TabsActionOrigin.USER) {
            "[RNScreens] User-triggered actions should be processed via regular setSelectedItemId callback"
        }
        this.actionOrigin = actionOrigin
        selectedItemId = itemId
        this.actionOrigin = null
    }

    override fun setSelectedItemId(itemId: Int) {
        if (this.actionOrigin == null) {
            this.actionOrigin = TabsActionOrigin.USER
        }

        val actionOrigin = checkNotNull(this.actionOrigin)
        super.setSelectedItemId(itemId)
        container.onAfterSetSelectedItemId(itemId, actionOrigin)

        this.actionOrigin = null
    }
}