package sample

import android.arch.lifecycle.MutableLiveData
import android.os.Bundle
import android.support.v7.app.AppCompatActivity
import android.view.View
import android.widget.Toast
import com.devindi.wallpaper.R

interface CounterView {
    fun setCounterValue(value: Int)
}

class CounterActivityMvp : AppCompatActivity(), CounterView {

    val presenter = CounterPresenter()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        presenter.view = this

        val view = View(this)
        view.id = R.id.increment

        setContentView(view)

        view.setOnClickListener{ presenter.increment() }
    }

    override fun setCounterValue(value: Int) {
        Toast.makeText(this, "Counter: $value", Toast.LENGTH_SHORT).show()
    }

    override fun onDestroy() {
        super.onDestroy()
        presenter.view = null
    }
}

class CounterPresenter {
    val model = CounterRepository()

    var view: CounterView? = null

    init {
        model.counter.observeForever { t -> view?.setCounterValue(t!!) }
    }

    fun increment() {
        model.increment()
    }

}

class CounterRepository {

    val counter = MutableLiveData<Int>()

    init {
        counter.value = 0
    }

    fun increment() {
        counter.value = counter.value!! + 1
    }
}