package moe.yuuta.workmode.gpl

import android.annotation.SuppressLint
import android.content.Context
import android.provider.Settings
import androidx.lifecycle.Lifecycle
import androidx.lifecycle.LifecycleObserver
import androidx.lifecycle.OnLifecycleEvent
import moe.yuuta.gplicense.AESObfuscator
import moe.yuuta.gplicense.LicenseChecker
import moe.yuuta.gplicense.LicenseCheckerCallback
import moe.yuuta.gplicense.ServerManagedPolicy
import moe.yuuta.workmode.BuildConfig

class GPLicenser(
        private val context: Context,
        private val lifecycle: Lifecycle,
        private val callback: LicenseCheckerCallback
) : LifecycleObserver {
    private val SALT = byteArrayOf(
            -90, 83, 80, -91, -37, -57, 74, -69, 52, 89,
            -9, -5, -77, -71, -36, -79, -11, 37, -69, 88
    )

    private lateinit var checker: LicenseChecker

    @OnLifecycleEvent(Lifecycle.Event.ON_CREATE)
    fun start() {
        @SuppressLint("HardwareIds") val android_id = Settings.Secure.getString(context.contentResolver,
                Settings.Secure.ANDROID_ID)
        checker = LicenseChecker(
                context,
                ServerManagedPolicy(context, AESObfuscator(SALT, BuildConfig.APPLICATION_ID, android_id)),
                BuildConfig.GOOGLE_PLAY_LICENSING_KEY
        )
        checker.checkAccess(callback)
    }

    @OnLifecycleEvent(Lifecycle.Event.ON_DESTROY)
    fun destroy() {
        if (::checker.isInitialized) {
            checker.onDestroy()
        }
    }
}