package com.suno.android.ui.screens.onboarding.welcome

import androidx.media3.common.MediaItem
import androidx.media3.common.Player
import androidx.media3.exoplayer.ExoPlayer
import com.suno.android.common_mvi.MviProcessorFactory
import com.suno.android.common_mvi.MviViewModel
import com.suno.android.media.VideoPreview
import dagger.hilt.android.lifecycle.HiltViewModel
import kotlinx.coroutines.flow.MutableStateFlow
import kotlinx.coroutines.flow.StateFlow
import kotlinx.coroutines.flow.asStateFlow
import javax.inject.Inject

@HiltViewModel
class WelcomeScreenVM @Inject constructor(
    processorFactory: MviProcessorFactory,
    @VideoPreview val exoPlayer: ExoPlayer,
) : MviViewModel<WelcomeScreenEvent, WelcomeScreenState, WelcomeScreenEffect>(
    processorFactory = processorFactory,
    initialState = WelcomeScreenState.NoOp,
) {
    init {
        exoPlayer.repeatMode = Player.REPEAT_MODE_ALL
        exoPlayer.setMediaItem(
            MediaItem.fromUri(
                "asset:///landing-video-1080p.webm",
            ),
        )
        exoPlayer.prepare()
        exoPlayer.play()
    }

    private val _viewStateFlow = MutableStateFlow(
        UiState(),
    )

    val viewStateFlow: StateFlow<UiState> = _viewStateFlow.asStateFlow()

    data class UiState(
        val loading: Boolean = false,
    )

    override suspend fun reduceEvent(
        currentState: WelcomeScreenState,
        event: WelcomeScreenEvent,
        emitEffect: suspend (WelcomeScreenEffect) -> Unit,
    ): WelcomeScreenState {
        when (event) {
            WelcomeScreenEvent.OnSignInClicked, WelcomeScreenEvent.OnSignUpClicked -> {
                emitEffect(WelcomeScreenEffect.NavigateToLoginOptionsEffect)
            }
        }
        return currentState
    }
}