refactor: refactor getAndroidVersionCodeChar()

) {

    private val systemAppProjectList = mutableListOf<SystemAppProject>()

    private val androidVersionCode by lazy { getAndroidVersionCodeChar() }

    private val androidVersionCode by lazy {

        try { getAndroidVersionCodeChar() }

        catch (exception: RuntimeException) {

            Timber.w(exception.message)

            "UnsupportedAndroidAPI"

        }

    }

    private fun getUpdatableSystemApps(): List<String> {

        return systemAppProjectList.map { it.packageName }

        }?.sortedByDescending { it.releasedAt }?.firstOrNull()

    }

    /*

    todo: this method cannot match upper version. UPSIDE_DOWN_CAKE or VANILLA or note available

    through BUILD.VERSIO_CODES (may be due to targeted SDK or minimum SDK.)

    todo: This method shouldn't be called for each app. We need to define it only once!

     */

    private fun getAndroidVersionCodeChar(): String {

        return when (Build.VERSION.SDK_INT) {

            Build.VERSION_CODES.Q -> "Q"

            Build.VERSION_CODES.R -> "R"

        val baseAPI = Build.VERSION_CODES.BASE

        val lastUnsupportedAPI = Build.VERSION_CODES.R

        return when (val currentAPI = Build.VERSION.SDK_INT) {

            in baseAPI.. lastUnsupportedAPI -> throw RuntimeException("Android $currentAPI is not supported anymore")

            Build.VERSION_CODES.S -> "S"

            Build.VERSION_CODES.TIRAMISU -> "T"

            else -> "unknown"

            else -> throw RuntimeException("Android $currentAPI and above is not yet supported")

        }

    }