/*
 * 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.filters.presentation

import android.net.Uri
import androidx.compose.animation.AnimatedContent
import androidx.compose.animation.core.animateDpAsState
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.rememberScrollState
import androidx.compose.material3.Icon
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.unit.dp
import com.t8rin.imagetoolbox.core.filters.presentation.model.UiFilter
import com.t8rin.imagetoolbox.core.resources.Icons
import com.t8rin.imagetoolbox.core.resources.R
import com.t8rin.imagetoolbox.core.resources.icons.Tune
import com.t8rin.imagetoolbox.core.ui.utils.content_pickers.rememberImagePicker
import com.t8rin.imagetoolbox.core.ui.utils.helper.AppToastHost
import com.t8rin.imagetoolbox.core.ui.utils.helper.Clipboard
import com.t8rin.imagetoolbox.core.ui.utils.helper.ProvideFilterPreview
import com.t8rin.imagetoolbox.core.ui.utils.helper.isPortraitOrientationAsState
import com.t8rin.imagetoolbox.core.ui.widget.AdaptiveLayoutScreen
import com.t8rin.imagetoolbox.core.ui.widget.buttons.CompareButton
import com.t8rin.imagetoolbox.core.ui.widget.buttons.ShareButton
import com.t8rin.imagetoolbox.core.ui.widget.buttons.ShowOriginalButton
import com.t8rin.imagetoolbox.core.ui.widget.controls.UndoRedoButtons
import com.t8rin.imagetoolbox.core.ui.widget.dialogs.ExitWithoutSavingDialog
import com.t8rin.imagetoolbox.core.ui.widget.dialogs.LoadingDialog
import com.t8rin.imagetoolbox.core.ui.widget.enhanced.EnhancedBadge
import com.t8rin.imagetoolbox.core.ui.widget.enhanced.EnhancedIconButton
import com.t8rin.imagetoolbox.core.ui.widget.enhanced.enhancedHorizontalScroll
import com.t8rin.imagetoolbox.core.ui.widget.image.AutoFilePicker
import com.t8rin.imagetoolbox.core.ui.widget.image.ImageContainer
import com.t8rin.imagetoolbox.core.ui.widget.modifier.detectSwipes
import com.t8rin.imagetoolbox.core.ui.widget.modifier.fadingEdges
import com.t8rin.imagetoolbox.core.ui.widget.modifier.scaleOnTap
import com.t8rin.imagetoolbox.core.ui.widget.sheets.ProcessImagesPreferenceSheet
import com.t8rin.imagetoolbox.core.ui.widget.text.TopAppBarTitle
import com.t8rin.imagetoolbox.core.ui.widget.text.marquee
import com.t8rin.imagetoolbox.core.ui.widget.utils.AutoContentBasedColors
import com.t8rin.imagetoolbox.feature.compare.presentation.components.CompareSheet
import com.t8rin.imagetoolbox.feature.filters.presentation.components.FiltersContentActionButtons
import com.t8rin.imagetoolbox.feature.filters.presentation.components.FiltersContentControls
import com.t8rin.imagetoolbox.feature.filters.presentation.components.FiltersContentNoData
import com.t8rin.imagetoolbox.feature.filters.presentation.components.FiltersContentSheets
import com.t8rin.imagetoolbox.feature.filters.presentation.components.FiltersContentTopAppBarActions
import com.t8rin.imagetoolbox.feature.filters.presentation.screenLogic.FiltersComponent

@Composable
fun FiltersContent(
    component: FiltersComponent
) {
    AutoContentBasedColors(component.previewBitmap)

    val imagePicker = rememberImagePicker(onSuccess = component::setBasicFilter)

    val pickSingleImagePicker = rememberImagePicker(onSuccess = component::setMaskFilter)

    var showExitDialog by rememberSaveable { mutableStateOf(false) }

    val onBack = {
        if (component.haveChanges) showExitDialog = true
        else if (component.filterType != null) {
            component.clearType()
        } else component.onGoBack()
    }

    val isPortrait by isPortraitOrientationAsState()

    var showOriginal by remember { mutableStateOf(false) }

    val actions: @Composable RowScope.() -> Unit = {
        val state = rememberScrollState()
        Row(
            modifier = Modifier
                .fadingEdges(state)
                .enhancedHorizontalScroll(state),
            verticalAlignment = Alignment.CenterVertically
        ) {
            Spacer(modifier = Modifier.width(8.dp))
            if (component.bitmap != null) {
                var editSheetData by remember {
                    mutableStateOf(listOf<Uri>())
                }
                ShareButton(
                    enabled = component.canSave,
                    onShare = component::performSharing,
                    onCopy = {
                        component.cacheCurrentImage(Clipboard::copy)
                    },
                    onEdit = {
                        component.cacheImages {
                            editSheetData = it
                        }
                    }
                )
                ProcessImagesPreferenceSheet(
                    uris = editSheetData,
                    visible = editSheetData.isNotEmpty(),
                    onDismiss = {
                        editSheetData = emptyList()
                    },
                    onNavigate = component.onNavigate
                )
                ShowOriginalButton(
                    canShow = component.canShow(),
                    onStateChange = {
                        showOriginal = it
                    }
                )
            }
            var showCompareSheet by rememberSaveable { mutableStateOf(false) }
            CompareButton(
                onClick = { showCompareSheet = true },
                visible = component.previewBitmap != null
            )
            CompareSheet(
                data = component.bitmap to component.previewBitmap,
                visible = showCompareSheet,
                onDismiss = {
                    showCompareSheet = false
                }
            )

            if (component.bitmap != null && (component.basicFilterState.filters.size >= 2 || component.maskingFilterState.masks.size >= 2)) {
                EnhancedIconButton(
                    onClick = component::showReorderSheet
                ) {
                    Icon(
                        imageVector = Icons.Rounded.Tune,
                        contentDescription = stringResource(R.string.properties)
                    )
                }
            }
            if (isPortrait) {
                UndoRedoButtons(
                    canUndo = component.canUndo,
                    canRedo = component.canRedo,
                    onUndo = component::undo,
                    onRedo = component::redo,
                    modifier = Modifier.padding(2.dp)
                )
            }
        }
    }

    var tempSelectionUris by rememberSaveable {
        mutableStateOf<List<Uri>?>(
            null
        )
    }

    LaunchedEffect(component.isSelectionFilterPickerVisible) {
        if (!component.isSelectionFilterPickerVisible) tempSelectionUris = null
    }

    val selectionFilterPicker = rememberImagePicker { uris: List<Uri> ->
        tempSelectionUris = uris
        if (uris.size > 1) {
            component.setBasicFilter(tempSelectionUris)
        } else {
            component.showSelectionFilterPicker()
        }
    }

    AutoFilePicker(
        onAutoPick = selectionFilterPicker::pickImage,
        isPickedAlready = component.initialType != null
    )

    AdaptiveLayoutScreen(
        shouldDisableBackHandler = !(component.haveChanges || component.filterType != null),
        onGoBack = onBack,
        title = {
            AnimatedContent(
                targetState = component.filterType?.let {
                    stringResource(it.title)
                }
            ) { title ->
                if (title == null) {
                    Row(
                        verticalAlignment = Alignment.CenterVertically,
                        modifier = Modifier.marquee()
                    ) {
                        Text(
                            text = stringResource(R.string.filter)
                        )
                        EnhancedBadge(
                            content = {
                                Text(
                                    text = UiFilter.count.toString()
                                )
                            },
                            containerColor = MaterialTheme.colorScheme.tertiary,
                            contentColor = MaterialTheme.colorScheme.onTertiary,
                            modifier = Modifier
                                .padding(horizontal = 2.dp)
                                .padding(bottom = 12.dp)
                                .scaleOnTap {
                                    AppToastHost.showConfetti()
                                }
                        )
                    }
                } else {
                    TopAppBarTitle(
                        title = title,
                        input = component.bitmap,
                        isLoading = component.isImageLoading,
                        size = component.imageInfo.sizeInBytes.toLong()
                    )
                }
            }
        },
        topAppBarPersistentActions = {
            FiltersContentTopAppBarActions(
                component = component,
                actions = actions
            )
        },
        actions = actions,
        showActionsInTopAppBar = false,
        canShowScreenData = component.filterType != null,
        imagePreview = {
            ImageContainer(
                modifier = Modifier
                    .detectSwipes(
                        onSwipeRight = component::selectLeftUri,
                        onSwipeLeft = component::selectRightUri
                    ),
                imageInside = isPortrait,
                showOriginal = showOriginal,
                previewBitmap = component.previewBitmap,
                originalBitmap = component.bitmap,
                isLoading = component.isImageLoading,
                shouldShowPreview = true,
                animatePreviewChange = false
            )
        },
        forceImagePreviewToMax = showOriginal,
        controls = {
            FiltersContentControls(component)
        },
        buttons = { bottomActions ->
            FiltersContentActionButtons(
                component = component,
                actions = bottomActions,
                imagePicker = imagePicker,
                pickSingleImagePicker = pickSingleImagePicker,
                selectionFilterPicker = selectionFilterPicker
            )
        },
        insetsForNoData = WindowInsets(0),
        noDataControls = {
            FiltersContentNoData(
                component = component,
                imagePicker = imagePicker,
                pickSingleImagePicker = pickSingleImagePicker,
                tempSelectionUris = tempSelectionUris
            )
        },
        contentPadding = animateDpAsState(
            if (component.filterType == null) 12.dp
            else 20.dp
        ).value,
    )

    ProvideFilterPreview(component.previewBitmap)

    FiltersContentSheets(component)

    LoadingDialog(
        visible = component.isSaving,
        done = component.done,
        left = component.left,
        onCancelLoading = component::cancelSaving
    )

    ExitWithoutSavingDialog(
        onExit = {
            if (component.filterType != null) {
                component.clearType()
            } else {
                component.onGoBack()
            }
        },
        onDismiss = { showExitDialog = false },
        visible = showExitDialog
    )
}
