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/*
 * Copyright © 2017-2019 WireGuard LLC. All Rights Reserved.
 * SPDX-License-Identifier: Apache-2.0
 */
package com.wireguard.android.activity

import android.os.Build
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.appcompat.app.AppCompatDelegate
import androidx.lifecycle.lifecycleScope
import com.wireguard.android.util.UserKnobs
import kotlinx.coroutines.flow.launchIn
import kotlinx.coroutines.flow.onEach

abstract class ThemeChangeAwareActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
            UserKnobs.darkTheme.onEach {
                val newMode = if (it) {
                    AppCompatDelegate.MODE_NIGHT_YES
                } else {
                    AppCompatDelegate.MODE_NIGHT_NO
                }
                if (AppCompatDelegate.getDefaultNightMode() != newMode) {
                    AppCompatDelegate.setDefaultNightMode(newMode)
                    recreate()
                }
            }.launchIn(lifecycleScope)
        }
    }
}