/*
 * ImageToolbox is an image editor for android
 * Copyright (c) 2026 T8RIN (Malik Mukhametzyanov)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * You should have received a copy of the Apache License
 * along with this program.  If not, see <http://www.apache.org/licenses/LICENSE-2.0>.
 */

package com.t8rin.imagetoolbox.feature.root.presentation.components.dialogs

import android.os.Build
import androidx.activity.compose.BackHandler
import com.t8rin.imagetoolbox.core.resources.Icons
import androidx.compose.material3.Icon
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
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.res.stringResource
import androidx.compose.ui.text.style.TextAlign
import com.t8rin.imagetoolbox.core.resources.R
import com.t8rin.imagetoolbox.core.resources.icons.DoorBack
import com.t8rin.imagetoolbox.core.ui.utils.navigation.Screen
import com.t8rin.imagetoolbox.core.ui.utils.provider.LocalComponentActivity
import com.t8rin.imagetoolbox.core.ui.utils.provider.LocalCurrentScreen
import com.t8rin.imagetoolbox.core.ui.widget.enhanced.EnhancedAlertDialog
import com.t8rin.imagetoolbox.core.ui.widget.enhanced.EnhancedButton
import com.t8rin.imagetoolbox.feature.root.presentation.screenLogic.RootComponent


@Composable
internal fun AppExitDialog(component: RootComponent) {
    val currentScreen = LocalCurrentScreen.current

    if (currentScreen is Screen.Main) {
        val context = LocalComponentActivity.current

        var showExitDialog by rememberSaveable { mutableStateOf(false) }

        val tiramisu = Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU
        BackHandler(enabled = !tiramisu) {
            if (component.shouldShowDialog) showExitDialog = true
            else context.finishAffinity()
        }

        AppExitDialogImpl(
            onDismiss = { showExitDialog = false },
            visible = showExitDialog && !tiramisu
        )
    }
}

@Composable
private fun AppExitDialogImpl(
    onDismiss: () -> Unit,
    visible: Boolean
) {
    val activity = LocalComponentActivity.current

    EnhancedAlertDialog(
        visible = visible,
        onDismissRequest = onDismiss,
        dismissButton = {
            EnhancedButton(
                containerColor = MaterialTheme.colorScheme.secondaryContainer,
                onClick = activity::finishAffinity
            ) {
                Text(stringResource(R.string.close))
            }
        },
        confirmButton = {
            EnhancedButton(onClick = onDismiss) {
                Text(stringResource(R.string.stay))
            }
        },
        title = { Text(stringResource(R.string.app_closing)) },
        text = {
            Text(
                stringResource(R.string.app_closing_sub),
                textAlign = TextAlign.Center
            )
        },
        icon = {
            Icon(
                imageVector = Icons.Outlined.DoorBack,
                contentDescription = null
            )
        }
    )
}