/*

 * AboutOss is an utility library to retrieve and display

 * opensource licenses in Android applications.

 *

 * Copyright (C) 2023 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.sampleapp

import androidx.compose.foundation.layout.*

import androidx.compose.foundation.lazy.grid.GridCells

import androidx.compose.foundation.lazy.grid.LazyVerticalGrid

import androidx.compose.foundation.lazy.grid.itemsIndexed

import androidx.compose.material3.*

import androidx.compose.runtime.*

import androidx.compose.ui.Alignment

import androidx.compose.ui.Modifier

import androidx.compose.ui.unit.dp

import androidx.lifecycle.viewmodel.compose.viewModel

import com.geekorum.aboutoss.ui.common.OpenSourceLicensesViewModel

@Composable

fun CustomViewer(

    viewModel: OpenSourceLicensesViewModel = viewModel(

        initializer = {

            createPrebuildOpenSourceLicensesViewModel()

        }

    ),

    modifier: Modifier = Modifier

) {

    Column(modifier = modifier) {

        Text("This section shows our you can use a custom ui to display licenses")

        DependenciesGrid(viewModel, Modifier.padding(top = 16.dp))

    }

}

@Composable

private fun DependenciesGrid(

    viewModel: OpenSourceLicensesViewModel,

    modifier: Modifier = Modifier

) {

    val dependencies by viewModel.dependenciesList.collectAsState(initial = emptyList())

    var selected by remember { mutableStateOf(-1) }

    LazyVerticalGrid(

        GridCells.Adaptive(150.dp),

        horizontalArrangement = Arrangement.spacedBy(16.dp),

        verticalArrangement = Arrangement.spacedBy(16.dp),

        modifier = modifier

    ) {

        itemsIndexed(dependencies) { idx, dependency ->

            if (idx == selected) {

                val license by viewModel.getLicenseDependency(dependency)

                    .collectAsState(initial = "")

                LicenseCard(license, onClick = {

                    selected = -1

                })

            } else {

                DependencyCard(dependency, onClick = {

                    selected = idx

                })

            }

        }

    }

}

@OptIn(ExperimentalMaterial3Api::class)

@Composable

private fun LicenseCard(license: String, onClick: () -> Unit) {

    Card(modifier = Modifier.size(150.dp), onClick = onClick,

        colors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.primary)

    ) {

        Text(

            license, style = MaterialTheme.typography.bodyMedium,

            modifier = Modifier

                .padding(16.dp)

                .fillMaxSize()

                .wrapContentSize(

                    Alignment.Center

                )

        )

    }

}

@OptIn(ExperimentalMaterial3Api::class)

@Composable

private fun DependencyCard(dependency: String, onClick: () -> Unit) {

    Card(modifier = Modifier.size(150.dp), onClick = onClick) {

        Text(

            dependency,

            style = MaterialTheme.typography.titleLarge,

            modifier = Modifier

                .padding(16.dp)

                .fillMaxSize()

                .wrapContentSize(

                    Alignment.Center

                )

        )

    }

}