/*
 * 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.pick_color.presentation.components

import android.graphics.Bitmap
import androidx.compose.animation.AnimatedContent
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.PaddingValues
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.WindowInsetsSides
import androidx.compose.foundation.layout.asPaddingValues
import androidx.compose.foundation.layout.calculateEndPadding
import androidx.compose.foundation.layout.calculateStartPadding
import androidx.compose.foundation.layout.displayCutout
import androidx.compose.foundation.layout.fillMaxHeight
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.navigationBars
import androidx.compose.foundation.layout.navigationBarsPadding
import androidx.compose.foundation.layout.only
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.union
import androidx.compose.foundation.layout.windowInsetsPadding
import androidx.compose.foundation.rememberScrollState
import com.t8rin.imagetoolbox.core.resources.Icons
import androidx.compose.material3.Icon
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.RectangleShape
import androidx.compose.ui.graphics.asImageBitmap
import androidx.compose.ui.platform.LocalLayoutDirection
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.unit.dp
import com.t8rin.colors.ImageColorDetector
import com.t8rin.imagetoolbox.core.resources.R
import com.t8rin.imagetoolbox.core.resources.icons.AddPhotoAlt
import com.t8rin.imagetoolbox.core.settings.presentation.provider.LocalSettingsState
import com.t8rin.imagetoolbox.core.ui.widget.enhanced.EnhancedFloatingActionButton
import com.t8rin.imagetoolbox.core.ui.widget.enhanced.enhancedVerticalScroll
import com.t8rin.imagetoolbox.core.ui.widget.image.ImageNotPickedWidget
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.modifier.transparencyChecker

@Composable
internal fun PickColorFromImageContentImpl(
    bitmap: Bitmap?,
    isPortrait: Boolean,
    panEnabled: Boolean,
    onColorChange: (Color) -> Unit,
    onPickImage: () -> Unit,
    magnifierButton: @Composable () -> Unit,
    switch: @Composable () -> Unit,
    onOneTimePickImage: () -> Unit,
    color: Color,
    contentPadding: PaddingValues
) {
    val settingsState = LocalSettingsState.current

    Box(
        modifier = Modifier
            .fillMaxSize()
            .padding(contentPadding)
    ) {
        bitmap?.let {
            if (isPortrait) {
                AnimatedContent(
                    targetState = it
                ) { bitmap ->
                    ImageColorDetector(
                        panEnabled = panEnabled,
                        imageBitmap = bitmap.asImageBitmap(),
                        color = color,
                        modifier = Modifier
                            .fillMaxSize()
                            .padding(16.dp)
                            .windowInsetsPadding(
                                WindowInsets.navigationBars
                                    .only(WindowInsetsSides.Bottom)
                                    .union(WindowInsets.displayCutout)
                            )
                            .container(resultPadding = 8.dp)
                            .clip(
                                ShapeDefaults.small
                            )
                            .transparencyChecker(),
                        isMagnifierEnabled = settingsState.magnifierEnabled,
                        onColorChange = onColorChange
                    )
                }
            } else {
                Row {
                    Box(
                        modifier = Modifier.weight(0.8f)
                    ) {
                        Box(Modifier.align(Alignment.Center)) {
                            AnimatedContent(
                                targetState = it
                            ) { bitmap ->
                                val direction = LocalLayoutDirection.current
                                ImageColorDetector(
                                    panEnabled = panEnabled,
                                    imageBitmap = bitmap.asImageBitmap(),
                                    color = color,
                                    modifier = Modifier
                                        .fillMaxSize()
                                        .padding(20.dp)
                                        .windowInsetsPadding(
                                            WindowInsets.navigationBars
                                                .only(WindowInsetsSides.Bottom)
                                                .union(WindowInsets.displayCutout)
                                        )
                                        .padding(
                                            start = WindowInsets
                                                .displayCutout
                                                .asPaddingValues()
                                                .calculateStartPadding(direction)
                                        )
                                        .container(resultPadding = 8.dp)
                                        .clip(ShapeDefaults.small)
                                        .transparencyChecker(),
                                    isMagnifierEnabled = settingsState.magnifierEnabled,
                                    onColorChange = onColorChange
                                )
                            }
                        }
                    }
                    val direction = LocalLayoutDirection.current
                    Column(
                        modifier = Modifier
                            .container(
                                shape = RectangleShape,
                                resultPadding = 0.dp
                            )
                            .fillMaxHeight()
                            .padding(horizontal = 20.dp)
                            .padding(
                                end = WindowInsets.displayCutout
                                    .asPaddingValues()
                                    .calculateEndPadding(direction)
                            )
                            .navigationBarsPadding(),
                        horizontalAlignment = Alignment.CenterHorizontally,
                        verticalArrangement = Arrangement.Center
                    ) {
                        magnifierButton()
                        Spacer(modifier = Modifier.height(8.dp))
                        switch()
                        Spacer(modifier = Modifier.height(8.dp))
                        EnhancedFloatingActionButton(
                            onClick = onPickImage,
                            onLongClick = onOneTimePickImage
                        ) {
                            Icon(
                                imageVector = Icons.Rounded.AddPhotoAlt,
                                contentDescription = stringResource(R.string.pick_image_alt)
                            )
                        }
                    }
                }
            }
        } ?: Column(
            modifier = Modifier
                .fillMaxWidth()
                .enhancedVerticalScroll(rememberScrollState()),
            horizontalAlignment = Alignment.CenterHorizontally
        ) {
            ImageNotPickedWidget(
                onPickImage = onPickImage,
                modifier = Modifier
                    .padding(bottom = 88.dp, top = 20.dp, start = 20.dp, end = 20.dp)
                    .navigationBarsPadding()
            )
        }
    }
}