package com.swmansion.rnscreens.events

import com.facebook.react.uimanager.UIManagerHelper
import com.swmansion.rnscreens.Screen
import com.swmansion.rnscreens.ScreenFragment

// TODO: Consider taking weak ref here or accepting screen as argument in every method
// to avoid reference cycle.
class ScreenEventEmitter(
    val screen: Screen,
) {
    val reactEventDispatcher
        get() = screen.reactEventDispatcher

    val reactSurfaceId
        get() = UIManagerHelper.getSurfaceId(screen)

    fun dispatchOnWillAppear() = reactEventDispatcher?.dispatchEvent(ScreenWillAppearEvent(reactSurfaceId, screen.id))

    fun dispatchOnAppear() = reactEventDispatcher?.dispatchEvent(ScreenAppearEvent(reactSurfaceId, screen.id))

    fun dispatchOnWillDisappear() = reactEventDispatcher?.dispatchEvent(ScreenWillDisappearEvent(reactSurfaceId, screen.id))

    fun dispatchOnDisappear() = reactEventDispatcher?.dispatchEvent(ScreenDisappearEvent(reactSurfaceId, screen.id))

    fun dispatchOnDismissed() = reactEventDispatcher?.dispatchEvent(ScreenDismissedEvent(reactSurfaceId, screen.id))

    fun dispatchTransitionProgress(
        progress: Float,
        isExitAnimation: Boolean,
        isGoingForward: Boolean,
    ) {
        val sanitizedProgress = progress.coerceIn(0.0f, 1.0f)
        val coalescingKey = ScreenFragment.getCoalescingKey(sanitizedProgress)
        reactEventDispatcher?.dispatchEvent(
            ScreenTransitionProgressEvent(reactSurfaceId, screen.id, sanitizedProgress, isExitAnimation, isGoingForward, coalescingKey),
        )
    }
}