/*
 * AboutOss is an utility library to retrieve and display
 * opensource licenses in Android applications.
 *
 * Copyright (C) 2023-2025 by Frederic-Charles Barthelery.
 *
 * This file is part of AboutOss.
 *
 * AboutOss is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * AboutOss is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with AboutOss.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.geekorum.aboutoss.ui.material

import androidx.compose.animation.core.animateDpAsState
import androidx.compose.foundation.clickable
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.lazy.items
import androidx.compose.foundation.lazy.rememberLazyListState
import androidx.compose.material.Divider
import androidx.compose.material.ExperimentalMaterialApi
import androidx.compose.material.Icon
import androidx.compose.material.IconButton
import androidx.compose.material.ListItem
import androidx.compose.material.Scaffold
import androidx.compose.material.Text
import androidx.compose.material.TopAppBar
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.automirrored.filled.ArrowBack
import androidx.compose.runtime.Composable
import androidx.compose.runtime.collectAsState
import androidx.compose.runtime.derivedStateOf
import androidx.compose.runtime.getValue
import androidx.compose.runtime.remember
import androidx.compose.ui.Modifier
import androidx.compose.ui.text.style.TextOverflow
import androidx.compose.ui.unit.dp
import com.geekorum.aboutoss.common.generated.resources.title_oss_licenses
import com.geekorum.aboutoss.ui.common.OpenSourceLicensesViewModel
import org.jetbrains.compose.resources.stringResource
import com.geekorum.aboutoss.common.generated.resources.Res as CommonRes

/**
 * Display the list of dependencies used in the application
 *
 * @param viewModel the [OpenSourceLicensesViewModel] to use
 * @param onDependencyClick lambda to execute on click on one dependency item
 * @param onUpClick lambda to execute on click on the up arrow
 */
@Composable
fun OpenSourceDependenciesListScreen(
    viewModel: OpenSourceLicensesViewModel,
    onDependencyClick: (String) -> Unit,
    onUpClick: () -> Unit
) {
    val dependencies by viewModel.dependenciesList.collectAsState(initial = emptyList())
    OpenSourceDependenciesListScreen(
        dependencies = dependencies,
        onDependencyClick = onDependencyClick,
        onUpClick = onUpClick
    )
}

/**
 * Display the list of dependencies used in the application
 *
 * @param dependencies the list of dependencies
 * @param onDependencyClick lambda to execute on click on one dependency item
 * @param onUpClick lambda to execute on click on the up arrow
 */
@OptIn(ExperimentalMaterialApi::class)
@Composable
fun OpenSourceDependenciesListScreen(
    dependencies: List<String>,
    onDependencyClick: (String) -> Unit,
    onUpClick: () -> Unit
) {
    val lazyListState = rememberLazyListState()
    val hasScrolled by remember {
        derivedStateOf {
            lazyListState.firstVisibleItemIndex  != 0 || lazyListState.firstVisibleItemScrollOffset > 0
        }
    }
    val topBarElevation by animateDpAsState(
        if (hasScrolled) 4.dp else 0.dp,
        label = "topBarElevation"
    )
    Scaffold(topBar = {
        TopAppBar(title = { Text(stringResource(CommonRes.string.title_oss_licenses)) },
            navigationIcon = {
                IconButton(onClick = onUpClick) {
                    Icon(
                        Icons.AutoMirrored.Filled.ArrowBack,
                        contentDescription = null
                    )
                }
            },
            elevation = topBarElevation
        )
    }) {
        LazyColumn(Modifier.fillMaxSize(), state = lazyListState, contentPadding = it) {
            items(dependencies) {
                Column {
                    ListItem(
                        Modifier
                            .height(64.dp)
                            .clickable(onClick = { onDependencyClick(it) })
                    ) {
                        Text(
                            it, modifier = Modifier.padding(horizontal = 16.dp),
                            overflow = TextOverflow.Ellipsis, maxLines = 1
                        )
                    }
                    Divider(Modifier.padding(horizontal = 16.dp))
                }
            }
        }
    }
}
