DDM 2021-11-17

package com.joythis.android.distanceindays;

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

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import java.util.Calendar;

public class MainActivity extends AppCompatActivity {
    AmUtil mUtil;
    TextView mTvResults;
    AmCalendar mCalendar;
    EditText mEtDate1, mEtDate2;
    Button mBtnComputeDistance, mBtnRequestDate1, mBtnRequestDate2;

    View.OnClickListener mClickHandler = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            switch(v.getId()){
                case R.id.idBtnComputeDistance:
                    actionComputeDistance();
                    break;
                case R.id.idBtnRequestDate1:
                    actionRequestDate1();
                    break;
                case R.id.idBtnRequestDate2:
                    actionRequestDate2();
                    break;
            }//switch
        }//onClick
    };

    public final static int CALL_ME_ON_THIS_REQUEST_CODE_WHEN_POSSIBLE = 123;
    void actionRequestDate1(){
        Intent goInputDate = new Intent(
            this,
            InputDateActivity.class
        );
        //startActivity(goInputDate);

        startActivityForResult(
            goInputDate,
            CALL_ME_ON_THIS_REQUEST_CODE_WHEN_POSSIBLE
        );
    }//actionRequestDate1

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

        //TODO
    }

    void actionRequestDate2(){

    }

    void actionComputeDistance(){
        int y,m,d;
        try {
            //TODO
        }
        catch (Exception e){
            //TODO
            mUtil.fb("Empty field.");
        }

    }//actionComputeDistance

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.rl_distance_in_days_v2);

        init();
    }//onCreate

    void init(){
        mUtil = new AmUtil (this);
        mEtDate1 = findViewById(R.id.idEtDate1);
        mEtDate2 = findViewById(R.id.idEtDate2);
        mBtnRequestDate1 = findViewById(R.id.idBtnRequestDate1);
        mBtnRequestDate2 = findViewById(R.id.idBtnRequestDate2);

        mBtnComputeDistance = findViewById(R.id.idBtnComputeDistance);

        String[] aDaysOfWeek =
            getResources().getStringArray
                (R.array.aDaysOfWeek);

        mTvResults = findViewById(R.id.idTvResults);

        mBtnRequestDate1.setOnClickListener(mClickHandler);
        mBtnRequestDate2.setOnClickListener(mClickHandler);

        mBtnComputeDistance.setOnClickListener(
            mClickHandler
        );
        displayCurrentYMD();

    }//init

    void displayCurrentYMD(){
        Calendar c = Calendar.getInstance();
        int y = c.get(Calendar.YEAR);
        int m = c.get(Calendar.MONTH)+1;
        int d = c.get(Calendar.DATE);
        /*
        mEtYear.setText(String.valueOf(y));
        mEtMonth.setText(String.valueOf(m));
        mEtDay.setText(String.valueOf(d));

         */
    }//displayCurrentYMD

    void auxTests(){
        //testing
        for (int day=1; day<=31; day+=1){
            AmCalendar calendarAtDay = new AmCalendar
                    (MainActivity.this, 2021, 1, day);
            String strDay = calendarAtDay.toString();
            mTvResults.setText(
                    strDay+"\n"+
                            mTvResults.getText().toString()
            );
        }//for
    }//auxTests

    /*
    EX1: on init make sure the EditTexts for
    year, month and day, are initialized to the
    device's current year, month and day

    EX2: create and print an AmCalendar object,
    corresponding to the user date
     */
}//MainActivity