package com.github.damontecres.wholphin

import androidx.compose.animation.AnimatedVisibility
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.size
import androidx.compose.material3.CircularProgressIndicator
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.collectAsState
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.RectangleShape
import androidx.compose.ui.unit.dp
import androidx.lifecycle.Lifecycle
import androidx.lifecycle.compose.LifecycleEventEffect
import androidx.lifecycle.viewmodel.navigation3.rememberViewModelStoreNavEntryDecorator
import androidx.navigation3.runtime.NavEntry
import androidx.navigation3.runtime.rememberSaveableStateHolderNavEntryDecorator
import androidx.navigation3.ui.NavDisplay
import androidx.tv.material3.MaterialTheme
import androidx.tv.material3.Surface
import com.github.damontecres.wholphin.preferences.AppPreferences
import com.github.damontecres.wholphin.preferences.UserPreferences
import com.github.damontecres.wholphin.services.BackdropService
import com.github.damontecres.wholphin.services.NavigationManager
import com.github.damontecres.wholphin.services.ScreensaverService
import com.github.damontecres.wholphin.services.SetupDestination
import com.github.damontecres.wholphin.ui.components.AppScreensaver
import com.github.damontecres.wholphin.ui.nav.ApplicationContent
import com.github.damontecres.wholphin.ui.setup.SwitchServerContent
import com.github.damontecres.wholphin.ui.setup.SwitchUserContent

@Composable
fun MainContent(
    backStack: MutableList<SetupDestination>,
    navigationManager: NavigationManager,
    appPreferences: AppPreferences,
    backdropService: BackdropService,
    screensaverService: ScreensaverService,
    modifier: Modifier = Modifier,
) {
    Surface(
        modifier =
            modifier
                .background(MaterialTheme.colorScheme.background),
        shape = RectangleShape,
    ) {
//                            val backStack = rememberNavBackStack(SetupDestination.Loading)
//                            setupNavigationManager.backStack = backStack
        NavDisplay(
            backStack = backStack,
            onBack = { backStack.removeLastOrNull() },
            entryDecorators =
                listOf(
                    rememberSaveableStateHolderNavEntryDecorator(),
                    rememberViewModelStoreNavEntryDecorator(),
                ),
            entryProvider = { key ->
                key as SetupDestination
                NavEntry(key) {
                    when (key) {
                        SetupDestination.Loading -> {
                            Box(
                                modifier = Modifier.size(200.dp),
                                contentAlignment = Alignment.Center,
                            ) {
                                CircularProgressIndicator(
                                    color = MaterialTheme.colorScheme.border,
                                    modifier = Modifier.align(Alignment.Center),
                                )
                            }
                        }

                        SetupDestination.ServerList -> {
                            SwitchServerContent(Modifier.fillMaxSize())
                        }

                        is SetupDestination.UserList -> {
                            SwitchUserContent(
                                currentServer = key.server,
                                Modifier.fillMaxSize(),
                            )
                        }

                        is SetupDestination.AppContent -> {
                            LaunchedEffect(Unit) {
                                backdropService.clearBackdrop()
                            }
                            val current = key.current
                            val preferences =
                                remember(appPreferences) {
                                    UserPreferences(appPreferences)
                                }
                            var showContent by remember {
                                mutableStateOf(true)
                            }
                            LifecycleEventEffect(Lifecycle.Event.ON_STOP) {
                                if (!appPreferences.signInAutomatically) {
                                    showContent = false
                                }
                            }

                            if (showContent) {
                                ApplicationContent(
                                    user = current.user,
                                    server = current.server,
                                    navigationManager = navigationManager,
                                    preferences = preferences,
                                    modifier = Modifier.fillMaxSize(),
                                )
                            } else {
                                Box(
                                    modifier = Modifier.size(200.dp),
                                    contentAlignment = Alignment.Center,
                                ) {
                                    CircularProgressIndicator(
                                        color = MaterialTheme.colorScheme.border,
                                        modifier = Modifier.align(Alignment.Center),
                                    )
                                }
                            }
                        }
                    }
                }
            },
        )
        val screenSaverState by screensaverService.state.collectAsState()
        if (screenSaverState.enabled || screenSaverState.enabledTemp) {
            AnimatedVisibility(
                screenSaverState.show,
                Modifier.fillMaxSize(),
            ) {
                AppScreensaver(appPreferences, Modifier.fillMaxSize())
            }
        }
    }
}