/*
 * 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.mesh_gradients.presentation

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.fillMaxSize
import androidx.compose.foundation.layout.padding
import com.t8rin.imagetoolbox.core.resources.Icons
import androidx.compose.material3.Icon
import androidx.compose.material3.Scaffold
import androidx.compose.material3.Text
import androidx.compose.material3.TopAppBarDefaults
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.input.nestedscroll.nestedScroll
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import com.t8rin.imagetoolbox.core.resources.R
import com.t8rin.imagetoolbox.core.resources.icons.ArrowBack
import com.t8rin.imagetoolbox.core.ui.utils.helper.ImageUtils.rememberHumanFileSize
import com.t8rin.imagetoolbox.core.ui.widget.enhanced.EnhancedIconButton
import com.t8rin.imagetoolbox.core.ui.widget.enhanced.EnhancedLoadingIndicator
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.image.ImagePreviewGrid
import com.t8rin.imagetoolbox.core.ui.widget.other.TopAppBarEmoji
import com.t8rin.imagetoolbox.core.ui.widget.text.marquee
import com.t8rin.imagetoolbox.feature.mesh_gradients.presentation.screenLogic.MeshGradientsComponent

@Composable
fun MeshGradientsContent(
    component: MeshGradientsComponent
) {
    val childScrollBehavior =
        TopAppBarDefaults.exitUntilCollapsedScrollBehavior()

    Scaffold(
        modifier = Modifier
            .fillMaxSize()
            .nestedScroll(childScrollBehavior.nestedScrollConnection),
        topBar = {
            EnhancedTopAppBar(
                title = {
                    Text(
                        text = stringResource(R.string.collection_mesh_gradients),
                        modifier = Modifier.marquee()
                    )
                },
                navigationIcon = {
                    EnhancedIconButton(
                        onClick = component.onGoBack
                    ) {
                        Icon(
                            imageVector = Icons.Rounded.ArrowBack,
                            contentDescription = null
                        )
                    }
                },
                actions = {
                    TopAppBarEmoji()
                },
                type = EnhancedTopAppBarType.Large,
                scrollBehavior = childScrollBehavior
            )
        }
    ) { contentPadding ->
        AnimatedContent(
            modifier = Modifier.fillMaxSize(),
            targetState = component.meshGradientUris
        ) { uris ->
            if (uris.isNotEmpty()) {
                ImagePreviewGrid(
                    data = uris,
                    onAddImages = null,
                    onShareImage = {
                        component.shareImages(
                            uriList = listOf(element = it),
                        )
                    },
                    onRemove = null,
                    onNavigate = component.onNavigate,
                    imageFrames = null,
                    onFrameSelectionChange = {},
                    contentPadding = PaddingValues(12.dp),
                    isSelectable = false,
                    modifier = Modifier.padding(contentPadding)
                )
            } else {
                val meshGradientDownloadProgress =
                    component.meshGradientDownloadProgress
                Box(
                    modifier = Modifier.fillMaxSize(),
                    contentAlignment = Alignment.Center
                ) {
                    val currentPercent =
                        meshGradientDownloadProgress?.currentPercent ?: 0f

                    if (currentPercent > 0f) {
                        EnhancedLoadingIndicator(
                            progress = currentPercent,
                            loaderSize = 72.dp
                        ) {
                            Column(
                                verticalArrangement = Arrangement.Center,
                                horizontalAlignment = Alignment.CenterHorizontally,
                                modifier = Modifier
                                    .fillMaxSize()
                                    .padding(8.dp)
                            ) {
                                Text(
                                    text = rememberHumanFileSize(
                                        meshGradientDownloadProgress?.currentTotalSize ?: 0
                                    ),
                                    maxLines = 1,
                                    textAlign = TextAlign.Center,
                                    fontSize = 10.sp,
                                    lineHeight = 10.sp
                                )
                            }
                        }
                    } else {
                        EnhancedLoadingIndicator()
                    }
                }
            }
        }
    }
}