package dev.meloda.fast.presentation

import android.content.Intent
import android.net.Uri
import android.provider.Settings
import androidx.activity.compose.LocalActivity
import androidx.compose.animation.core.tween
import androidx.compose.animation.fadeIn
import androidx.compose.animation.fadeOut
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.material3.AlertDialog
import androidx.compose.material3.Text
import androidx.compose.material3.TextButton
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.window.DialogProperties
import androidx.lifecycle.compose.collectAsStateWithLifecycle
import androidx.navigation.NavController
import androidx.navigation.NavHostController
import androidx.navigation.compose.NavHost
import androidx.navigation.compose.rememberNavController
import dev.meloda.fast.MainViewModel
import dev.meloda.fast.auth.authNavGraph
import dev.meloda.fast.auth.navigateToAuth
import dev.meloda.fast.chatmaterials.navigation.chatMaterialsScreen
import dev.meloda.fast.chatmaterials.navigation.navigateToChatMaterials
import dev.meloda.fast.conversations.navigation.createChatScreen
import dev.meloda.fast.conversations.navigation.navigateToCreateChat
import dev.meloda.fast.languagepicker.navigation.languagePickerScreen
import dev.meloda.fast.languagepicker.navigation.navigateToLanguagePicker
import dev.meloda.fast.messageshistory.navigation.messagesHistoryScreen
import dev.meloda.fast.messageshistory.navigation.navigateToMessagesHistory
import dev.meloda.fast.navigation.Main
import dev.meloda.fast.navigation.mainScreen
import dev.meloda.fast.photoviewer.presentation.PhotoViewDialog
import dev.meloda.fast.settings.navigation.navigateToSettings
import dev.meloda.fast.settings.navigation.settingsScreen
import dev.meloda.fast.ui.R
import dev.meloda.fast.ui.theme.LocalNavController
import dev.meloda.fast.ui.theme.LocalNavRootController

@Composable
fun RootScreen(
    navController: NavHostController = rememberNavController(),
    viewModel: MainViewModel
) {
    val activity = LocalActivity.current
    val context = LocalContext.current
    val startDestination by viewModel.startDestination.collectAsStateWithLifecycle()
    val isNeedToOpenAuth by viewModel.isNeedToReplaceWithAuth.collectAsStateWithLifecycle()
    val isNeedToShowDeniedDialog by viewModel.isNeedToShowNotificationsDeniedDialog.collectAsStateWithLifecycle()
    val isNeedToShowRationaleDialog by viewModel.isNeedToShowNotificationsRationaleDialog.collectAsStateWithLifecycle()

    LaunchedEffect(isNeedToOpenAuth) {
        if (isNeedToOpenAuth) {
            viewModel.onNavigatedToAuth()
            navController.navigateToAuth(clearBackStack = true)
        }
    }

    if (isNeedToShowDeniedDialog) {
        AlertDialog(
            onDismissRequest = viewModel::onNotificationsDeniedDialogDismissed,
            title = { Text(text = stringResource(id = R.string.warning)) },
            text = { Text(text = stringResource(id = R.string.background_long_poll_denied_text)) },
            confirmButton = {
                TextButton(onClick = viewModel::onNotificationsDeniedDialogConfirmClicked) {
                    Text(text = stringResource(id = R.string.action_request))
                }
            },
            dismissButton = {
                TextButton(onClick = viewModel::onNotificationsDeniedDialogCancelClicked) {
                    Text(text = stringResource(id = R.string.action_disable))
                }
            },
            properties = DialogProperties(
                dismissOnBackPress = false,
                dismissOnClickOutside = false
            )
        )
    }

    if (isNeedToShowRationaleDialog) {
        AlertDialog(
            onDismissRequest = viewModel::onNotificationsRationaleDialogDismissed,
            title = { Text(text = stringResource(id = R.string.warning)) },
            text = { Text(text = stringResource(id = R.string.background_long_poll_rationale_text)) },
            confirmButton = {
                TextButton(
                    onClick = {
                        context.startActivity(
                            Intent(
                                Settings.ACTION_APPLICATION_DETAILS_SETTINGS,
                                Uri.fromParts("package", context.packageName, null)
                            )
                        )
                    }
                ) {
                    Text(text = stringResource(id = R.string.title_settings))
                }
            },
            dismissButton = {
                TextButton(onClick = viewModel::onNotificationsRationaleDialogCancelClicked) {
                    Text(text = stringResource(id = R.string.action_disable))
                }
            },
            properties = DialogProperties(
                dismissOnBackPress = false,
                dismissOnClickOutside = false
            )
        )
    }

    if (startDestination != null) {
        CompositionLocalProvider(
            LocalNavRootController provides navController,
            LocalNavController provides navController
        ) {
            var photoViewerInfo by rememberSaveable {
                mutableStateOf<Pair<List<String>, Int?>?>(null)
            }

            Box(modifier = Modifier.fillMaxSize()) {
                NavHost(
                    navController = navController,
                    startDestination = requireNotNull(startDestination),
                    enterTransition = { fadeIn(animationSpec = tween(200)) },
                    exitTransition = { fadeOut(animationSpec = tween(200)) }
                ) {
                    authNavGraph(
                        onNavigateToMain = {
                            viewModel.onUserAuthenticated()
                            navController.navigateToMain()
                        },
                        onNavigateToSettings = navController::navigateToSettings,
                        navController = navController
                    )

                    mainScreen(
                        onError = viewModel::onError,
                        onSettingsButtonClicked = navController::navigateToSettings,
                        onNavigateToMessagesHistory = navController::navigateToMessagesHistory,
                        onPhotoClicked = { url -> photoViewerInfo = listOf(url) to null },
                        onMessageClicked = navController::navigateToMessagesHistory,
                        onNavigateToCreateChat = navController::navigateToCreateChat
                    )

                    messagesHistoryScreen(
                        onError = viewModel::onError,
                        onBack = navController::navigateUp,
                        onNavigateToChatMaterials = navController::navigateToChatMaterials,
                        onNavigateToPhotoViewer = { photos, index ->
                            photoViewerInfo = photos to index
                        }
                    )
                    chatMaterialsScreen(
                        onBack = navController::navigateUp,
                        onPhotoClicked = { url -> photoViewerInfo = listOf(url) to null }
                    )
                    createChatScreen(
                        onChatCreated = { conversationId ->
                            navController.popBackStack()
                            navController.navigateToMessagesHistory(conversationId)
                        },
                        navController = navController
                    )

                    settingsScreen(
                        onBack = navController::navigateUp,
                        onLogOutButtonClicked = { navController.navigateToAuth(true) },
                        onLanguageItemClicked = navController::navigateToLanguagePicker,
                        onRestartRequired = {
                            activity?.let {
                                val intent = Intent(activity, MainActivity::class.java)
                                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK)
                                activity.startActivity(intent)
                                activity.finish()
                            }
                        }
                    )
                    languagePickerScreen(onBack = navController::navigateUp)
                }

                PhotoViewDialog(
                    photoViewerInfo = photoViewerInfo,
                    onDismiss = { photoViewerInfo = null }
                )
            }
        }
    }
}

fun NavController.navigateToMain() {
    this.navigate(Main) {
        popUpTo(0) {
            inclusive = true
        }
    }
}