package edu.ualr.jlgraham2.magic8ball

import android.content.Context
import android.hardware.Sensor
import android.hardware.SensorEvent
import android.hardware.SensorEventListener
import android.hardware.SensorManager
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.widget.TextView
import java.util.Random
import kotlin.math.abs
import kotlinx.android.synthetic.main.activity_main.*
import android.os.PersistableBundle

class MainActivity : AppCompatActivity(), SensorEventListener {

    // Sets up a Sensor and SensorManager

    var mySensorManager: SensorManager? = null
    var myAccelerometer: Sensor? = null


    //declare the initial values for the sensors

    var lastX = 0.0f
    var lastY = 0.0f
    var lastZ = 0.0f
    var lastTime = System.currentTimeMillis()



    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        // Initializes Sensor and Sensor Manager

        mySensorManager = getSystemService(Context.SENSOR_SERVICE) as SensorManager
        myAccelerometer = mySensorManager!!.getDefaultSensor(Sensor.TYPE_ACCELEROMETER)

    }


    override fun onResume() {
        super.onResume()

        // Allows SensorManager to begin receiving readings

        mySensorManager!!.registerListener(this, myAccelerometer, SensorManager.SENSOR_DELAY_UI)

    }


    override fun onPause() {
        super.onPause()

        // This function call suspends the accelerometer to save battery life

        mySensorManager!!.unregisterListener(this)
    }


    override fun onAccuracyChanged(sensor: Sensor?, accuracy: Int) {

        // Implemented because SensorEventListener is an abstract class

    }


    override fun onSensorChanged(event: SensorEvent?) {

        // Initializes the message that will be output to the text view

        val randomMessage : TextView =
                findViewById(R.id.randomMessage)

        // Creates a randomizer that gives us a randomly generated number between two values

        val random = Random()

        fun randomizer(min: Int, max: Int): Int {
            return random.nextInt(max - min) + min
        }


        // Assigns the values grabbed by getResult to a message that is passed to randomMessage

        var currentTime = System.currentTimeMillis()

        if(currentTime - lastTime > 500) {
            val x = event!!.values[0]
            val y = event!!.values[1]
            val z = event!!.values[2]
            val changeInPosition = abs(x + y + z - lastX - lastY - lastZ)
            val changeInTime = currentTime - lastTime
            val speed = changeInPosition / changeInTime

            if(speed > 12){

                // getResult calls the randomizer function, passing 1 to min and 10 to max

                val getResult = randomizer(1, 10)

                when (getResult)
                {
                    1 -> randomMessage.text = "I don't think so."
                    2 -> randomMessage.text = "Reply hazy, try again."
                    3 -> randomMessage.text = "Very doubtful."
                    4 -> randomMessage.text = "Better not tell you now."
                    5 -> randomMessage.text = "Don't count on it."
                    6 -> randomMessage.text = "Definitely not."
                    7 -> randomMessage.text = "Outlook not so good."
                    8 -> randomMessage.text = "My sources say no."
                    9 -> randomMessage.text = "Extremely unlikely."
                    10 -> randomMessage.text = "Concentrate and ask again."
                }
            }

            lastX = x
            lastY = y
            lastZ = z

            lastTime = currentTime

        }

    }
}