/*
 * 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.core.ui.widget.buttons

import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.pager.PagerState
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.rememberCoroutineScope
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.text.font.FontWeight
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.icons.ArrowBackIos
import com.t8rin.imagetoolbox.core.resources.icons.ArrowForwardIos
import com.t8rin.imagetoolbox.core.ui.widget.enhanced.EnhancedIconButton
import com.t8rin.imagetoolbox.core.ui.widget.modifier.ShapeDefaults
import com.t8rin.imagetoolbox.core.ui.widget.modifier.container
import kotlinx.coroutines.launch

@Composable
fun PagerScrollPanel(
    pagerState: PagerState,
    modifier: Modifier = Modifier
) {
    val scope = rememberCoroutineScope()

    Row(
        modifier = modifier.container(
            shape = ShapeDefaults.circle,
            resultPadding = 4.dp
        ),
        verticalAlignment = Alignment.CenterVertically
    ) {
        EnhancedIconButton(
            onClick = {
                scope.launch {
                    pagerState.animateScrollToPage(
                        (pagerState.currentPage - 1).takeIf { it >= 0 }
                            ?: (pagerState.pageCount - 1)
                    )
                }
            },
            containerColor = MaterialTheme.colorScheme.surface
        ) {
            Icon(
                imageVector = Icons.Rounded.ArrowBackIos,
                contentDescription = null,
                modifier = Modifier.size(20.dp)
            )
        }

        Text(
            text = "${pagerState.currentPage + 1} / ${pagerState.pageCount}",
            modifier = Modifier.weight(1f),
            fontWeight = FontWeight.Bold,
            textAlign = TextAlign.Center,
            fontSize = 18.sp
        )

        EnhancedIconButton(
            onClick = {
                scope.launch {
                    pagerState.animateScrollToPage(
                        (pagerState.currentPage + 1) % pagerState.pageCount
                    )
                }
            },
            containerColor = MaterialTheme.colorScheme.surface
        ) {
            Icon(
                imageVector = Icons.Rounded.ArrowForwardIos,
                contentDescription = null,
                modifier = Modifier.size(20.dp)
            )
        }
    }
}