package com.example.pairs;

import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.view.View;
import android.view.WindowManager;
import android.widget.ImageButton;
import android.widget.ImageView;

import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
import androidx.cardview.widget.CardView;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;

import java.util.Random;

public class MainActivity extends AppCompatActivity {

    ImageButton home, retry;
    ImageView one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve;
    Bitmap[] images = new Bitmap[6];
    Bitmap defImage;
    ImageView firstClicked = null;
    boolean canClick = true;

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

        setUIVariables();
        setImages();
        setRandomizedPair();

        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
    }

    void setRandomizedPair() {
        int[] pairImages = {0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5};

        shuffleArray(pairImages);

        one.setTag(pairImages[0]);
        two.setTag(pairImages[1]);
        three.setTag(pairImages[2]);
        four.setTag(pairImages[3]);
        five.setTag(pairImages[4]);
        six.setTag(pairImages[5]);
        seven.setTag(pairImages[6]);
        eight.setTag(pairImages[7]);
        nine.setTag(pairImages[8]);
        ten.setTag(pairImages[9]);
        eleven.setTag(pairImages[10]);
        twelve.setTag(pairImages[11]);
    }
    void setImages() {
        defImage = ((BitmapDrawable) one.getDrawable()).getBitmap();

        for (int i = 0; i < images.length; i++) {
            int resID = getResources().getIdentifier("flip" + (i + 1), "drawable", getPackageName());
            images[i] = BitmapFactory.decodeResource(getResources(), resID);
        }
    }

    void setUIVariables() {
        one = findViewById(R.id.one);
        two = findViewById(R.id.two);
        three = findViewById(R.id.three);
        four = findViewById(R.id.four);
        five = findViewById(R.id.five);
        six = findViewById(R.id.six);
        seven = findViewById(R.id.seven);
        eight = findViewById(R.id.eight);
        nine = findViewById(R.id.nine);
        ten = findViewById(R.id.ten);
        eleven = findViewById(R.id.eleven);
        twelve = findViewById(R.id.twelve);

        retry = findViewById(R.id.retryBtn);
        home = findViewById(R.id.homeBtn);

        View.OnClickListener onClickListener = new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                handleImageClick((ImageView) view);
            }
        };

        one.setOnClickListener(onClickListener);
        two.setOnClickListener(onClickListener);
        three.setOnClickListener(onClickListener);
        four.setOnClickListener(onClickListener);
        five.setOnClickListener(onClickListener);
        six.setOnClickListener(onClickListener);
        seven.setOnClickListener(onClickListener);
        eight.setOnClickListener(onClickListener);
        nine.setOnClickListener(onClickListener);
        ten.setOnClickListener(onClickListener);
        eleven.setOnClickListener(onClickListener);
        twelve.setOnClickListener(onClickListener);

        home.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivity(new Intent(MainActivity.this, homeScreen.class));
            }
        });

        retry.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = getIntent();
                finish();
                startActivity(intent);
            }
        });
    }
    private void shuffleArray(int[] array) {
        Random rnd = new Random();
        for (int i = array.length - 1; i > 0; i--) {
            int index = rnd.nextInt(i + 1);
            int temp = array[index];
            array[index] = array[i];
            array[i] = temp;
        }
    }
    void handleImageClick(ImageView imageView) {
        if (imageView == firstClicked || !canClick)
            return;


        int pairID = (int) imageView.getTag();
        Bitmap image = images[pairID];

        imageView.setImageBitmap(image);

        if (firstClicked == null) {
            firstClicked = imageView;
        } else {
            canClick = false;
            if ((int) firstClicked.getTag() == pairID) {
                firstClicked.setEnabled(false);
                imageView.setEnabled(false);
                firstClicked = null;
                canClick = true;

                if(checkWin()) {
                    startActivity(new Intent(MainActivity.this, winScreen.class));
                }
            } else {
                imageView.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        // Reset image views to default image
                        firstClicked.setImageBitmap(defImage);
                        imageView.setImageBitmap(defImage);
                        firstClicked = null;
                        canClick = true;
                    }
                }, 1000);
            }
        }
    }

    boolean checkWin() {
        ImageView[] img = new ImageView[] {
                one, two, three, four, five, six,
                seven, eight, nine, ten, eleven, twelve
        };

        for (int i = 0; i < img.length; i++) {
            if(img[i].isEnabled()) return false;
        }

        return true;
    }
}