DDM 2022-10-26

// MainActivity.java
package com.joythis.android.motivator;

import androidx.appcompat.app.AppCompatActivity;

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

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    //data members
    Context mContext;

    // for correspondence with whatever relevant in the layout
    TextView mTvAbout, mTvMsgs;
    SeekBar mSbProb; // the user picked probability (of a positive message)
    Button mBtnGetMsg;

    // trio for respecting MVC for ListView
    ListView mLvMsgs;
    //the data
    ArrayList<String> mAlMsgs;
    //the broker
    ArrayAdapter<String> mAd;

    String[] maPositive, maNegative;

    //behavior (click) handler
    View.OnClickListener mClickHandler =
    new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            switch(v.getId()){
                case R.id.idBtnGetMsg:
                    //displayMsgInTextView();
                    displayMessageInListView();
                    break;
            }//switch
        }//onClick
    };//mClickHandler

    void displayMessageInListView(){
        int iUserPickedProbabilityOfPositiveMsg =
                mSbProb.getProgress(); //0..100

        int iRandom = AmUtil.randomInt(
                0,
                mSbProb.getMax()
        );

        boolean bDecidePositive =
                iRandom<iUserPickedProbabilityOfPositiveMsg;

        String strMsg = "";
        if (bDecidePositive) {
            strMsg = maPositive[
                    AmUtil.randomInt(
                            0,
                            maPositive.length - 1
                    )
                    ];
        }
        else
        {
            strMsg = maNegative[
                    AmUtil.randomInt(
                            0,
                            maNegative.length-1
                    )
                    ];
        }

        //???? add strMsg to the ListView
        //mAlMsgs.add(strMsg); // inserts at the end
        mAlMsgs.add(0, strMsg);
        mAd.notifyDataSetChanged();
    }//displayMessageInListView

    void displayMsgInTextView(){
        //String strP1 = maPositive[0];
        //String strN3 = maNegative[2];
        int iUserPickedProbabilityOfPositiveMsg =
            mSbProb.getProgress(); //0..100

        int iRandom = AmUtil.randomInt(
            0,
            mSbProb.getMax()
        );

        boolean bDecidePositive =
            iRandom<iUserPickedProbabilityOfPositiveMsg;

        String strMsg = "";
        if (bDecidePositive) {
            strMsg = maPositive[
                AmUtil.randomInt(
                    0,
                    maPositive.length - 1
                )
            ];
        }
        else
        {
            strMsg = maNegative[
                AmUtil.randomInt(
                    0,
                    maNegative.length-1
                )
            ];
        }

        String strPast = mTvMsgs.getText().toString();
        mTvMsgs.setText(strMsg+"\n"+strPast);
    }//displayMsg

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //setContentView(R.layout.activity_main);
        //setContentView(R.layout.rl_motivator_v1);
        //setContentView(R.layout.cl_motivator_v1);
        setContentView(R.layout.rl_motivator_v2);

        init();
    }//onCreate

    void init(){
        //inits
        mContext = this;
        mTvAbout = findViewById(R.id.idTvAbout);
        mSbProb = findViewById(R.id.idSbProb);
        mBtnGetMsg = findViewById(R.id.idBtnGetMsg);

        //caution!
        mTvMsgs = findViewById(R.id.idTvMsgs);

        mLvMsgs = findViewById(R.id.idLvMsgs);
        mAlMsgs = new ArrayList<>();
        mAd = new ArrayAdapter<>(
            mContext,
            android.R.layout.simple_list_item_1,
            mAlMsgs
        );
        mLvMsgs.setAdapter(mAd);

        maPositive = this.getResources().
            getStringArray(R.array.saPositiveMsgs);
        maNegative = this.getResources().
            getStringArray(R.array.saNegativeMsgs);

        //quality control

        //set behavior
        //associate mBtnGetMsg to some behavior handler
        mBtnGetMsg.setOnClickListener(
            mClickHandler
        );

        /*
        testing randomInt
         */
        /*
        for(int idx=0; idx<100; idx+=1){
            int iRandom = AmUtil.randomInt(555, 777);
            mTvMsgs.setText(
                String.valueOf(iRandom)
                +"\n"+
                mTvMsgs.getText().toString()
            );
        }
         */
    }//init
}//class MainActivity