package com.example.l6z1

import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import android.view.View
import android.widget.Button
import android.widget.EditText
import android.widget.TextView
import android.widget.Toast
import com.google.gson.Gson
import retrofit2.Call
import retrofit2.Callback
import retrofit2.Response
import retrofit2.Retrofit
import retrofit2.converter.gson.GsonConverterFactory
import retrofit2.converter.scalars.ScalarsConverterFactory
import retrofit2.http.GET
import retrofit2.http.Path
import org.json.JSONObject



class MainActivity : AppCompatActivity() {

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

    }

    fun getExpression() : String{
        return findViewById<EditText>(R.id.editText).text.toString()
    }


    interface NewtonApi{
        @GET("/{operation}/{expression}")
        fun getResult(@Path("operation") operation : String, @Path("expression") expression : String) : Call<String>
    }

    fun calculateResult(operation: String, expression: String){
        var retrofit = Retrofit.Builder()
            .baseUrl("https://newton.now.sh")
            .addConverterFactory(ScalarsConverterFactory.create())
            .build()

        var api = retrofit.create(NewtonApi::class.java)

        var call = api.getResult(operation, expression)

        call.enqueue(object : Callback<String> {
            override fun onResponse(call: Call<String>, response: Response<String>) {
                var result = response.body().toString()
                val obj = JSONObject(result)
                Log.d("am2019", "result: ${obj.get("result")}")
                findViewById<TextView>(R.id.result).text = obj.get("result").toString()

            }

            override fun onFailure(call: Call<String>, t: Throwable) {
                Log.d("am2019", "error")
                findViewById<TextView>(R.id.result).text = "error"
            }
        })
    }

    fun onClick(view : View){
        calculateResult((view as Button).text.toString(), getExpression())
        //Toast.makeText(this, (view as Button).text, Toast.LENGTH_SHORT).show()
    }
}