/*
 * 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.single_edit.presentation.components

import android.graphics.Bitmap
import androidx.compose.animation.AnimatedVisibility
import androidx.compose.animation.expandVertically
import androidx.compose.animation.fadeIn
import androidx.compose.animation.fadeOut
import androidx.compose.animation.scaleIn
import androidx.compose.animation.scaleOut
import androidx.compose.animation.shrinkVertically
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.asPaddingValues
import androidx.compose.foundation.layout.aspectRatio
import androidx.compose.foundation.layout.calculateStartPadding
import androidx.compose.foundation.layout.displayCutout
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.width
import androidx.compose.material3.Icon
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.SheetValue
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.derivedStateOf
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableFloatStateOf
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.graphics.Color
import androidx.compose.ui.graphics.asImageBitmap
import androidx.compose.ui.platform.LocalFocusManager
import androidx.compose.ui.platform.LocalLayoutDirection
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.unit.dp
import com.t8rin.imagetoolbox.core.domain.model.coerceIn
import com.t8rin.imagetoolbox.core.domain.model.pt
import com.t8rin.imagetoolbox.core.domain.utils.notNullAnd
import com.t8rin.imagetoolbox.core.filters.domain.model.Filter
import com.t8rin.imagetoolbox.core.filters.presentation.widget.FilterTemplateCreationSheetComponent
import com.t8rin.imagetoolbox.core.filters.presentation.widget.addFilters.AddFiltersSheetComponent
import com.t8rin.imagetoolbox.core.resources.Icons
import com.t8rin.imagetoolbox.core.resources.R
import com.t8rin.imagetoolbox.core.resources.icons.Done
import com.t8rin.imagetoolbox.core.resources.icons.Redo
import com.t8rin.imagetoolbox.core.resources.icons.Undo
import com.t8rin.imagetoolbox.core.settings.presentation.provider.LocalSettingsState
import com.t8rin.imagetoolbox.core.ui.theme.outlineVariant
import com.t8rin.imagetoolbox.core.ui.widget.buttons.EraseModeButton
import com.t8rin.imagetoolbox.core.ui.widget.buttons.PanModeButton
import com.t8rin.imagetoolbox.core.ui.widget.controls.selection.AlphaSelector
import com.t8rin.imagetoolbox.core.ui.widget.controls.selection.HelperGridParamsSelector
import com.t8rin.imagetoolbox.core.ui.widget.controls.selection.MagnifierEnabledSelector
import com.t8rin.imagetoolbox.core.ui.widget.enhanced.EnhancedIconButton
import com.t8rin.imagetoolbox.core.ui.widget.enhanced.EnhancedTopAppBar
import com.t8rin.imagetoolbox.core.ui.widget.enhanced.EnhancedTopAppBarType
import com.t8rin.imagetoolbox.core.ui.widget.modifier.HelperGridParams
import com.t8rin.imagetoolbox.core.ui.widget.modifier.ShapeDefaults
import com.t8rin.imagetoolbox.core.ui.widget.modifier.container
import com.t8rin.imagetoolbox.core.ui.widget.other.DrawLockScreenOrientation
import com.t8rin.imagetoolbox.core.ui.widget.saver.ColorSaver
import com.t8rin.imagetoolbox.core.ui.widget.saver.PtSaver
import com.t8rin.imagetoolbox.core.ui.widget.text.marquee
import com.t8rin.imagetoolbox.feature.draw.domain.DrawLineStyle
import com.t8rin.imagetoolbox.feature.draw.domain.DrawMode
import com.t8rin.imagetoolbox.feature.draw.domain.DrawPathMode
import com.t8rin.imagetoolbox.feature.draw.presentation.components.BitmapDrawer
import com.t8rin.imagetoolbox.feature.draw.presentation.components.BrushSoftnessSelector
import com.t8rin.imagetoolbox.feature.draw.presentation.components.DrawColorSelector
import com.t8rin.imagetoolbox.feature.draw.presentation.components.DrawLineAngleSelector
import com.t8rin.imagetoolbox.feature.draw.presentation.components.DrawLineStyleSelector
import com.t8rin.imagetoolbox.feature.draw.presentation.components.DrawModeSelector
import com.t8rin.imagetoolbox.feature.draw.presentation.components.DrawPathModeSelector
import com.t8rin.imagetoolbox.feature.draw.presentation.components.LineWidthSelector
import com.t8rin.imagetoolbox.feature.draw.presentation.components.OpenColorPickerCard
import com.t8rin.imagetoolbox.feature.draw.presentation.components.UiPathPaint
import com.t8rin.imagetoolbox.feature.draw.presentation.components.canShowLineAngle
import com.t8rin.imagetoolbox.feature.pick_color.presentation.components.PickColorFromImageSheet

@Composable
fun DrawEditOption(
    visible: Boolean,
    onRequestFiltering: suspend (Bitmap, List<Filter<*>>) -> Bitmap?,
    drawMode: DrawMode,
    onUpdateDrawMode: (DrawMode) -> Unit,
    drawPathMode: DrawPathMode,
    onUpdateDrawPathMode: (DrawPathMode) -> Unit,
    drawLineStyle: DrawLineStyle,
    onUpdateDrawLineStyle: (DrawLineStyle) -> Unit,
    onDismiss: () -> Unit,
    useScaffold: Boolean,
    bitmap: Bitmap?,
    onGetBitmap: (Bitmap) -> Unit,
    undo: () -> Unit,
    redo: () -> Unit,
    paths: List<UiPathPaint>,
    lastPaths: List<UiPathPaint>,
    undonePaths: List<UiPathPaint>,
    addPath: (UiPathPaint) -> Unit,
    spotHealCache: Map<Int, Bitmap>,
    onCacheSpotHealPathResult: (Int, Bitmap) -> Unit,
    helperGridParams: HelperGridParams,
    onUpdateHelperGridParams: (HelperGridParams) -> Unit,
    addFiltersSheetComponent: AddFiltersSheetComponent,
    filterTemplateCreationSheetComponent: FilterTemplateCreationSheetComponent,
    onRemovePath: (UiPathPaint) -> Unit
) {
    bitmap?.let {
        var panEnabled by rememberSaveable { mutableStateOf(false) }

        val switch = @Composable {
            PanModeButton(
                selected = panEnabled,
                onClick = {
                    panEnabled = !panEnabled
                }
            )
        }

        var showPickColorSheet by rememberSaveable { mutableStateOf(false) }

        var isEraserOn by rememberSaveable { mutableStateOf(false) }

        val settingsState = LocalSettingsState.current
        var strokeWidth by rememberSaveable(stateSaver = PtSaver) { mutableStateOf(settingsState.defaultDrawLineWidth.pt) }
        var drawColor by rememberSaveable(stateSaver = ColorSaver) { mutableStateOf(settingsState.defaultDrawColor) }

        var alpha by rememberSaveable(drawMode) {
            mutableFloatStateOf(if (drawMode is DrawMode.Highlighter) 0.4f else 1f)
        }
        var showLineAngle by rememberSaveable { mutableStateOf(false) }
        var brushSoftness by rememberSaveable(drawMode, stateSaver = PtSaver) {
            mutableStateOf(if (drawMode is DrawMode.Neon) 35.pt else 0.pt)
        }

        LaunchedEffect(drawMode, strokeWidth) {
            strokeWidth = if (drawMode is DrawMode.Image) {
                strokeWidth.coerceIn(10.pt, 120.pt)
            } else {
                strokeWidth.coerceIn(1.pt, 100.pt)
            }
        }

        val secondaryControls = @Composable {
            Row(
                modifier = Modifier.then(
                    if (!useScaffold) {
                        Modifier
                            .padding(16.dp)
                            .container(shape = ShapeDefaults.circle)
                    } else Modifier
                )
            ) {
                switch()
                Spacer(Modifier.width(8.dp))
                EnhancedIconButton(
                    containerColor = Color.Transparent,
                    borderColor = MaterialTheme.colorScheme.outlineVariant(
                        luminance = 0.1f
                    ),
                    onClick = undo,
                    enabled = lastPaths.isNotEmpty() || paths.isNotEmpty()
                ) {
                    Icon(
                        imageVector = Icons.Rounded.Undo,
                        contentDescription = "Undo"
                    )
                }
                EnhancedIconButton(
                    containerColor = Color.Transparent,
                    borderColor = MaterialTheme.colorScheme.outlineVariant(
                        luminance = 0.1f
                    ),
                    onClick = redo,
                    enabled = undonePaths.isNotEmpty()
                ) {
                    Icon(
                        imageVector = Icons.Rounded.Redo,
                        contentDescription = "Redo"
                    )
                }
                EraseModeButton(
                    selected = isEraserOn,
                    enabled = !panEnabled,
                    onClick = {
                        isEraserOn = !isEraserOn
                    }
                )
            }
        }

        var stateBitmap by remember(bitmap, visible) { mutableStateOf(bitmap) }
        FullscreenEditOption(
            canGoBack = paths.isEmpty(),
            visible = visible,
            onDismiss = onDismiss,
            useScaffold = useScaffold,
            controls = { scaffoldState ->
                Column(
                    modifier = Modifier.padding(vertical = 16.dp),
                    verticalArrangement = Arrangement.spacedBy(8.dp),
                    horizontalAlignment = Alignment.CenterHorizontally
                ) {
                    val focus = LocalFocusManager.current
                    LaunchedEffect(scaffoldState?.bottomSheetState?.currentValue, focus) {
                        val current = scaffoldState?.bottomSheetState?.currentValue
                        if (current.notNullAnd { it != SheetValue.Expanded }) {
                            focus.clearFocus()
                        }
                    }

                    if (!useScaffold) secondaryControls()
                    AnimatedVisibility(
                        visible = drawMode !is DrawMode.SpotHeal && drawMode !is DrawMode.Warp,
                        enter = fadeIn() + expandVertically(),
                        exit = fadeOut() + shrinkVertically(),
                        modifier = Modifier.fillMaxWidth()
                    ) {
                        OpenColorPickerCard(
                            onOpen = {
                                showPickColorSheet = true
                            }
                        )
                    }
                    AnimatedVisibility(
                        visible = drawMode !is DrawMode.PathEffect && drawMode !is DrawMode.Image && drawMode !is DrawMode.SpotHeal && drawMode !is DrawMode.Warp,
                        enter = fadeIn() + expandVertically(),
                        exit = fadeOut() + shrinkVertically(),
                        modifier = Modifier.fillMaxWidth()
                    ) {
                        DrawColorSelector(
                            value = drawColor,
                            onValueChange = { drawColor = it },
                            modifier = Modifier.padding(horizontal = 16.dp)
                        )
                    }
                    AnimatedVisibility(
                        visible = drawPathMode.canChangeStrokeWidth,
                        enter = fadeIn() + expandVertically(),
                        exit = fadeOut() + shrinkVertically(),
                        modifier = Modifier.fillMaxWidth()
                    ) {
                        LineWidthSelector(
                            modifier = Modifier.padding(horizontal = 16.dp),
                            title = if (drawMode is DrawMode.Text) {
                                stringResource(R.string.font_size)
                            } else stringResource(R.string.line_width),
                            valueRange = if (drawMode is DrawMode.Image) {
                                10f..120f
                            } else 1f..100f,
                            value = strokeWidth.value,
                            onValueChange = { strokeWidth = it.pt }
                        )
                    }
                    AnimatedVisibility(
                        visible = drawMode !is DrawMode.Highlighter && drawMode !is DrawMode.PathEffect && drawMode !is DrawMode.SpotHeal && drawMode !is DrawMode.Warp,
                        enter = fadeIn() + expandVertically(),
                        exit = fadeOut() + shrinkVertically(),
                        modifier = Modifier.fillMaxWidth()
                    ) {
                        BrushSoftnessSelector(
                            modifier = Modifier.padding(horizontal = 16.dp),
                            value = brushSoftness.value,
                            onValueChange = { brushSoftness = it.pt }
                        )
                    }
                    AnimatedVisibility(
                        visible = drawMode !is DrawMode.Neon && drawMode !is DrawMode.PathEffect && drawMode !is DrawMode.SpotHeal && drawMode !is DrawMode.Warp,
                        enter = fadeIn() + expandVertically(),
                        exit = fadeOut() + shrinkVertically(),
                        modifier = Modifier.fillMaxWidth()
                    ) {
                        AlphaSelector(
                            value = alpha,
                            onValueChange = { alpha = it },
                            modifier = Modifier.padding(horizontal = 16.dp)
                        )
                    }
                    DrawModeSelector(
                        addFiltersSheetComponent = addFiltersSheetComponent,
                        filterTemplateCreationSheetComponent = filterTemplateCreationSheetComponent,
                        modifier = Modifier.padding(horizontal = 16.dp),
                        value = drawMode,
                        strokeWidth = strokeWidth,
                        onValueChange = {
                            if (it is DrawMode.Warp) {
                                onUpdateDrawPathMode(DrawPathMode.Free)
                                onUpdateDrawLineStyle(DrawLineStyle.None)
                            }
                            onUpdateDrawMode(it)
                        },
                        values = remember(drawLineStyle) {
                            derivedStateOf {
                                if (drawLineStyle == DrawLineStyle.None) {
                                    DrawMode.entries
                                } else {
                                    listOf(
                                        DrawMode.Pen,
                                        DrawMode.Highlighter,
                                        DrawMode.Neon
                                    )
                                }
                            }
                        }.value
                    )
                    AnimatedVisibility(
                        visible = drawMode !is DrawMode.Warp,
                        enter = fadeIn() + expandVertically(),
                        exit = fadeOut() + shrinkVertically(),
                        modifier = Modifier.fillMaxWidth()
                    ) {
                        DrawPathModeSelector(
                            modifier = Modifier.padding(horizontal = 16.dp),
                            value = drawPathMode,
                            onValueChange = onUpdateDrawPathMode,
                            values = remember(drawMode, drawLineStyle) {
                                derivedStateOf {
                                    if (drawMode !is DrawMode.Text && drawMode !is DrawMode.Image) {
                                        when (drawLineStyle) {
                                            DrawLineStyle.None -> DrawPathMode.entries

                                            !is DrawLineStyle.Stamped<*> -> listOf(
                                                DrawPathMode.Free,
                                                DrawPathMode.Line,
                                                DrawPathMode.LinePointingArrow(),
                                                DrawPathMode.PointingArrow(),
                                                DrawPathMode.DoublePointingArrow(),
                                                DrawPathMode.DoubleLinePointingArrow(),
                                            ) + DrawPathMode.outlinedEntries

                                            else -> listOf(
                                                DrawPathMode.Free,
                                                DrawPathMode.Line
                                            ) + DrawPathMode.outlinedEntries
                                        }
                                    } else {
                                        listOf(
                                            DrawPathMode.Free,
                                            DrawPathMode.Line
                                        ) + DrawPathMode.outlinedEntries
                                    }
                                }
                            }.value,
                            drawMode = drawMode
                        )
                    }
                    AnimatedVisibility(
                        visible = drawPathMode.canShowLineAngle() && drawMode !is DrawMode.Warp,
                        enter = fadeIn() + expandVertically(),
                        exit = fadeOut() + shrinkVertically(),
                        modifier = Modifier.fillMaxWidth()
                    ) {
                        DrawLineAngleSelector(
                            modifier = Modifier
                                .fillMaxWidth()
                                .padding(horizontal = 16.dp),
                            checked = showLineAngle,
                            onCheckedChange = { showLineAngle = it }
                        )
                    }
                    AnimatedVisibility(
                        visible = drawMode !is DrawMode.Warp,
                        enter = fadeIn() + expandVertically(),
                        exit = fadeOut() + shrinkVertically(),
                        modifier = Modifier.fillMaxWidth()
                    ) {
                        DrawLineStyleSelector(
                            modifier = Modifier.padding(horizontal = 16.dp),
                            value = drawLineStyle,
                            onValueChange = onUpdateDrawLineStyle
                        )
                    }
                    HelperGridParamsSelector(
                        value = helperGridParams,
                        onValueChange = onUpdateHelperGridParams,
                        modifier = Modifier.padding(horizontal = 16.dp)
                    )
                    MagnifierEnabledSelector(
                        modifier = Modifier
                            .fillMaxWidth()
                            .padding(horizontal = 16.dp),
                        shape = ShapeDefaults.extraLarge,
                    )
                }
            },
            fabButtons = null,
            actions = {
                if (useScaffold) {
                    secondaryControls()
                    Spacer(Modifier.weight(1f))
                }
            },
            topAppBar = { closeButton ->
                EnhancedTopAppBar(
                    type = EnhancedTopAppBarType.Center,
                    navigationIcon = closeButton,
                    actions = {
                        AnimatedVisibility(
                            visible = paths.isNotEmpty(),
                            enter = fadeIn() + scaleIn(),
                            exit = fadeOut() + scaleOut()
                        ) {
                            EnhancedIconButton(
                                containerColor = MaterialTheme.colorScheme.tertiaryContainer,
                                onClick = {
                                    onGetBitmap(stateBitmap)
                                    onDismiss()
                                }
                            ) {
                                Icon(
                                    imageVector = Icons.Rounded.Done,
                                    contentDescription = "Done"
                                )
                            }
                        }
                    },
                    title = {
                        Text(
                            text = stringResource(R.string.draw),
                            modifier = Modifier.marquee()
                        )
                    }
                )
            }
        ) {
            val direction = LocalLayoutDirection.current
            Box(contentAlignment = Alignment.Center) {
                remember(bitmap) {
                    derivedStateOf {
                        bitmap.copy(Bitmap.Config.ARGB_8888, true).asImageBitmap()
                    }
                }.value.let { imageBitmap ->
                    val aspectRatio = imageBitmap.width / imageBitmap.height.toFloat()
                    BitmapDrawer(
                        imageBitmap = imageBitmap,
                        paths = paths,
                        onRequestFiltering = onRequestFiltering,
                        strokeWidth = strokeWidth,
                        brushSoftness = brushSoftness,
                        drawColor = drawColor.copy(alpha),
                        onAddPath = addPath,
                        isEraserOn = isEraserOn,
                        drawMode = drawMode,
                        modifier = Modifier
                            .padding(
                                start = WindowInsets
                                    .displayCutout
                                    .asPaddingValues()
                                    .calculateStartPadding(direction)
                            )
                            .padding(16.dp)
                            .aspectRatio(aspectRatio, !useScaffold)
                            .fillMaxSize(),
                        panEnabled = panEnabled,
                        onDraw = {
                            stateBitmap = it
                        },
                        drawPathMode = drawPathMode,
                        backgroundColor = Color.Transparent,
                        drawLineStyle = drawLineStyle,
                        helperGridParams = helperGridParams,
                        showLineAngle = showLineAngle,
                        spotHealCache = spotHealCache,
                        onCacheSpotHealPathResult = onCacheSpotHealPathResult,
                        onRemovePath = onRemovePath
                    )
                }
            }
        }
        var color by rememberSaveable(stateSaver = ColorSaver) {
            mutableStateOf(Color.Black)
        }
        PickColorFromImageSheet(
            visible = showPickColorSheet,
            onDismiss = {
                showPickColorSheet = false
            },
            bitmap = stateBitmap,
            onColorChange = { color = it },
            color = color
        )

        if (visible) {
            DrawLockScreenOrientation()
        }
    }
}