DDM 20201112

package com.joythis.android.distancebetweendates;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;

import java.util.ArrayList;

public class DatesRequesterActivity extends AppCompatActivity {
    Context mContext;

    Button mBtnRequestDate1, mBtnRequestDate2;
    TextView mTvShowDate1, mTvShowDate2;
    Button mBtnCompute;

    ListView mLvFeedback;
    ArrayList<String> mAlComputedDistances;
    ArrayAdapter<String> mAd;

    Button.OnClickListener mButtonClickHandler = new Button.OnClickListener() {
        @Override
        public void onClick(View v) {
            int id = v.getId();
            switch(id){
                case R.id.idBtnRequestDate1:
                    actionRequestDate1();
                    break;
                case R.id.idBtnRequestDate2:
                    actionRequestDate2();
                    break;
                case R.id.idBtnConfirmDate:
                    actionConfirmDate();
                    break;
            }//switch
        }//onClick
    };//mButtonClickHandler

    public final static int
        CALL_ME_ON_THIS_NUMBER_WHEN_YOU_HAVE_A_RESULT = 123;

    void goPickSomeDate(){
        Intent goToDatesInputActivityAndPickDate =
                new Intent(
                        this,
                        DateInputActivity.class
                );

        //startActivity(goToDatesInputActivityAndPickDate);

        startActivityForResult(
            goToDatesInputActivityAndPickDate,
            CALL_ME_ON_THIS_NUMBER_WHEN_YOU_HAVE_A_RESULT
        );
    }//goPickSomeDate

    //CTRL O
    @Override
    protected void onActivityResult
    (int requestCode, int resultCode, @Nullable Intent data)
    {
        super.onActivityResult(requestCode, resultCode, data);

        boolean bUserConfirmedData = resultCode == RESULT_OK;
        boolean bUserCanceled = resultCode == RESULT_CANCELED;

        if (bUserConfirmedData){
           switch(requestCode){
               case CALL_ME_ON_THIS_NUMBER_WHEN_YOU_HAVE_A_RESULT:
                   boolean bNotEmptyData = data!=null;
                   if (bNotEmptyData){
                       int y = data.getIntExtra(
                           DateInputActivity.KEY_YEAR, DEFAULT_YEAR
                       );
                       int m = data.getIntExtra(
                           DateInputActivity.KEY_MONTH, DEFAULT_MONTH
                       );
                       int d =
                           data.getIntExtra(
                               DateInputActivity.KEY_DAY, DEFAULT_DAY
                           );

                       //got y,m,d responded in DateInputActivity
                       /*
                       TODO: build a string + an object of type AmCalendar
                       corresponding to the received date
                       display the string
                        */
                   }//if there is data
                   break;
           }//switch
        }//if user confirmed the interaction
    }//onActivityResult

    void actionRequestDate1(){
        goPickSomeDate();
    }//actionRequestDate1

    void actionRequestDate2(){
        goPickSomeDate();
    }//actionRequestDate2

    void actionConfirmDate(){

    }//actionConfirmDate

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.dates_requester_rl);

        init();
    }//onCreate

    void init(){
        mContext = this;
        mBtnRequestDate1 = findViewById(R.id.idBtnRequestDate1);
        mBtnRequestDate2 = findViewById(R.id.idBtnRequestDate2);
        mTvShowDate1 = findViewById(R.id.idTvShowDate1);
        mTvShowDate2 = findViewById(R.id.idTvShowDate2);
        mBtnCompute = findViewById(R.id.idBtnCompute);
        mLvFeedback = findViewById(R.id.idLvFeedback);

        mAlComputedDistances = new ArrayList<>();
        mAd = new ArrayAdapter<>(
            mContext,
            android.R.layout.simple_list_item_1,
            mAlComputedDistances
        );
        mLvFeedback.setAdapter(mAd);

        Button[] aBtns = {
            mBtnRequestDate1,
            mBtnRequestDate2,
            mBtnCompute
        };
        for (Button b : aBtns)
            b.setOnClickListener(mButtonClickHandler);

    }


}//DatesRequesterActivity