package my.package

import android.app.Application
import my.package.ble.ScannerManager

class MainApplication : Application() {
    override fun onCreate() {
        super.onCreate()

        // delegated to a ble component, to keep the pure app module clean of direct accesses to the library
        ScannerManager.init(this)
    }
}

package my.package

import android.os.Bundle
import android.util.Log
import androidx.activity.ComponentActivity
import my.package.ble.Configuration
import my.package.ble.IStatusCallback
import my.package.ble.ScannerManager
import my.package.ble.UserConfig

class MainActivity : ComponentActivity() {
    // actions are delegated to a component
    private lateinit var mScannerManager: ScannerManager
    // configuration settings are delegated to a component
    private lateinit var mConfiguration: Configuration
    // a status is kept to know if the scanning is active
    private var mIsScanning: Boolean = false

    override fun onCreate(savedInstanceState: Bundle?) {
        if (BuildConfig.DEBUG) Log.d(TAG, "lifecycle onCreate")
        super.onCreate(savedInstanceState)

        mScannerManager = ScannerManager(this)
        // here, a simple interactive configuration, assuming a user in control
        mConfiguration = UserConfig.create()

        // ... (UI) setup your screen layout
        // typically, for this sample, with start and stop buttons to act on the scanning,
        // respectively associated with onClickSetup() and onClickTeardown()
    }

    override fun onDestroy() {
        // should be harmless if already stopped some other way (for example a receiver detecting that the Bluetooth has turned off)
        if (mIsScanning) mScannerManager.tearDown()
        super.onDestroy()
    }

    private val mStatusCallback = object : IStatusCallback {
        override fun onResult(isScanning: Boolean) {
            if (BuildConfig.DEBUG) Log.d(TAG, "onResult: isScanning $isScanning")
            mIsScanning = isScanning
            // ... (UI) may need to update some elements, like button properties (text, enabled, ...)
        }

        override fun onError(message: String) {
            if (BuildConfig.DEBUG) Log.d(TAG, "onError $message")
            // ... (UI) inform of the failure
        }
    }

    private fun onClickSetup() {
        if (BuildConfig.DEBUG) Log.d(TAG, "onClickSetUp")
        if (mScannerManager.isBluetoothDisabled) {
            // ... (UI) inform that the app can't work at all if the Bluetooth is off
        } else {
            if (mScannerManager.isLocationDisabled) {
                // ... (UI) inform that no detection will be accessible until Location is enabled
            }
            // ... (UI) according to RadioButtons, may call mConfiguration.setRangingScanFrequency() (default setting)
            // or mConfiguration.setMonitoringScanFrequency()
            // ... (UI) according to a CheckBox, may set mConfiguration.verbose = true
            mScannerManager.setUp(mConfiguration, mStatusCallback)
        }
    }

    private fun onClickTeardown() {
      if (BuildConfig.DEBUG) Log.d(TAG, "onClickTearDown")
        mScannerManager.tearDown(mStatusCallback)
    }

    private companion object {
        private val TAG = MainActivity::class.java.simpleName
    }
}

package my.package.ble

interface IStatusCallback {
    fun onResult(isScanning: Boolean)
    fun onError(message: String)
}