/*
    LibrePods - AirPods liberated from Apple’s ecosystem
    Copyright (C) 2025 LibrePods contributors

    This program 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
    any later version.

    This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
*/

package me.kavishdevar.librepods.presentation.screens

import android.annotation.SuppressLint
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.asPaddingValues
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.navigationBars
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.statusBars
import androidx.compose.material3.ExperimentalMaterial3Api
import androidx.compose.material3.MaterialTheme
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.unit.dp
import com.kyant.backdrop.backdrops.layerBackdrop
import com.kyant.backdrop.backdrops.rememberLayerBackdrop
import com.mikepenz.aboutlibraries.ui.compose.m3.LibrariesContainer
import com.mikepenz.aboutlibraries.ui.compose.produceLibraries
import dev.chrisbanes.haze.materials.ExperimentalHazeMaterialsApi
import kotlinx.coroutines.Job
import me.kavishdevar.librepods.R
import me.kavishdevar.librepods.presentation.theme.DesignSystem
import me.kavishdevar.librepods.presentation.theme.LocalDesignSystem
import kotlin.io.encoding.ExperimentalEncodingApi

private var debounceJob: Job? = null

@SuppressLint("DefaultLocale")
@ExperimentalHazeMaterialsApi
@OptIn(ExperimentalMaterial3Api::class, ExperimentalEncodingApi::class)
@Composable
fun OpenSourceLicensesScreen() {
    val backdrop = rememberLayerBackdrop()

    val m3eEnabled = LocalDesignSystem.current == DesignSystem.Material
    val topPadding = if (m3eEnabled) 0.dp else WindowInsets.statusBars.asPaddingValues().calculateTopPadding() + 84.dp
    val bottomPadding = if (m3eEnabled) 0.dp else WindowInsets.navigationBars.asPaddingValues().calculateBottomPadding() + 12.dp

    Column(
        modifier = Modifier
            .fillMaxSize()
            .layerBackdrop(backdrop)
            .background(MaterialTheme.colorScheme.surfaceContainer)
            .padding(horizontal = 16.dp),
        verticalArrangement = Arrangement.spacedBy(16.dp)
    ) {
        Spacer(modifier = Modifier.height(topPadding))
        val context = LocalContext.current
        val libraries by produceLibraries {
            context.resources.openRawResource(R.raw.aboutlibraries)
                .bufferedReader()
                .use { it.readText() }
        }
        LibrariesContainer(
            libraries = libraries,
            modifier = Modifier
                .padding(0.dp)
                .fillMaxSize()
        )
        Spacer(modifier = Modifier.height(bottomPadding))
    }
}
