TitleScreen.java

import processing.core.PImage;

import java.awt.*;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;

public class TitleScreen implements Renderable{
    private StringBuilder stringBuilder = new StringBuilder();
    private final Main main = Main.getInstance();
    private Mode mode;
    private final float centerX = main.width / 2;

    // title screen variables
    private final PImage titleImage, whatIsThisImage, playImage;
    private float titleImageY = .2F * main.height;
    private float whatIsThisButtonY = .40F * main.height;
    private float playButtonY = .60F * main.height;
    private final float widthTitleButton = .5F * main.width; // 50% of width
    private final float heightTitleButton = .1F * main.height; // 10% of width

    // play screen variables
    private final PImage widthImage, heightImage, monsterImage;
    private PlayField playField;
    private float leftX = .2F * main.width;
    private float widthY = .1F * main.height;
    private float heightY = .3F * main.height;
    private float monstersY = .5F * main.height;
    private float playY = .7F * main.height;
    private float inputAreaX = .7F * main.width;
    private float inputAreaWidth = .5F * main.width;
    private float inputAreaHeight = .1F * main.height;
    private int height = 15;
    private int width = 15;
    private int amountMonsters = 2;

    public TitleScreen(){
        mode = Mode.TITLE;
        titleImage = main.loadImage("maze_runner.png");
        titleImage.resize(800, 0);
        whatIsThisImage = main.loadImage("what_is_this.png");
        whatIsThisImage.resize(400, 0);
        playImage = main.loadImage("play.png");
        playImage.resize(200, 0);
        widthImage = main.loadImage("width.png");
        widthImage.resize(400, 0);
        heightImage = main.loadImage("height.png");
        heightImage.resize(400, 0);
        monsterImage = main.loadImage("monsters.png");
        monsterImage.resize(400, 0);
    }

    @Override
    public void render(){
        switch(mode){
            case TITLE:
                renderTitleMode();
                break;
            case PLAY:
                renderPlayMode();
                break;
        }
    }

    private void renderTitleMode(){
        main.imageMode(main.CENTER);
        main.image(titleImage, centerX, titleImageY);
        main.rectMode(main.CENTER);
        main.fill(0, 105, 217);
        main.rect(centerX, whatIsThisButtonY, widthTitleButton, heightTitleButton);
        main.image(whatIsThisImage, centerX, whatIsThisButtonY);
        main.fill(33, 136, 56);
        main.rect(centerX, playButtonY, widthTitleButton, heightTitleButton);
        main.image(playImage, centerX, playButtonY);
    }

    private void renderPlayMode(){
        main.imageMode(main.CENTER);
        main.rectMode(main.CENTER);
        main.textSize(widthY * .7F);
        main.stroke(255);

        // width input
        main.fill(255);
        main.rect(inputAreaX, widthY, inputAreaWidth, inputAreaHeight);
        main.fill(0);
        main.text(width, inputAreaX - inputAreaX * .3F, widthY + widthY * .3F);
        main.image(widthImage, leftX, widthY);

        // height input
        main.fill(255);
        main.rect(inputAreaX, heightY, inputAreaWidth, inputAreaHeight);
        main.fill(0);
        main.text(height, inputAreaX - inputAreaX * .3F, heightY + widthY * .3F);
        main.image(heightImage, leftX, heightY);

        // monster amount input
        main.fill(255);
        main.rect(inputAreaX, monstersY, inputAreaWidth, inputAreaHeight);
        main.fill(0);
        main.text(amountMonsters, inputAreaX - inputAreaX * .3F, monstersY + widthY * .3F);
        main.image(monsterImage, leftX, monstersY);

        // play button
        main.fill(33, 136, 56);
        main.rect(centerX, playY, widthTitleButton, heightTitleButton);
        main.image(playImage, centerX, playY);
    }

    public void feedCharacter(char key){
        if(mode == Mode.PLAY){
            if(key == '\b' && stringBuilder.length() >= 1){
                // backspace
                stringBuilder.replace(stringBuilder.length() - 1, stringBuilder.length(), "");
            }

            // make sure input is a number
            try{
                int value = Integer.parseInt(key + "");
                stringBuilder.append(value);
            }catch (NumberFormatException e){
                // cannot accept non number
            }

            if(playField != null){
                parseInput();
            }
        }
    }

    public void click(){
        switch(mode){
            case TITLE:
                // what is this section clicked
                if(main.mouseX >= centerX - widthTitleButton / 2 && main.mouseX <= centerX + widthTitleButton / 2 &&
                        main.mouseY >= whatIsThisButtonY - heightTitleButton / 2 && main.mouseY <= whatIsThisButtonY + heightTitleButton / 2){
                    Desktop desktop = Desktop.getDesktop();
                    try{
                        desktop.browse(new URI("https://github.com/WilliamC07/MazeRunner/blob/master/README.md"));
                    }catch (URISyntaxException | IOException e){
                        e.printStackTrace();
                    }
                }
                // play section clicked
                if(main.mouseX >= centerX - widthTitleButton / 2 && main.mouseX <= centerX + widthTitleButton / 2 &&
                        main.mouseY >= playButtonY - heightTitleButton / 2 && main.mouseY <= playButtonY + heightTitleButton / 2){
                    mode = Mode.PLAY;
                }
                break;
            case PLAY:
                // parse input when clicked
                stringBuilder = new StringBuilder();
                fixBounds();

                // width section clicked
                if(main.mouseX >= inputAreaX - inputAreaWidth / 2 && main.mouseX <= inputAreaX + inputAreaWidth / 2 &&
                   main.mouseY >= widthY - inputAreaHeight / 2 && main.mouseY <= widthY + inputAreaHeight / 2){
                    playField = PlayField.WIDTH;
                }

                // height section clicked
                if(main.mouseX >= inputAreaX - inputAreaWidth / 2 && main.mouseX <= inputAreaX + inputAreaWidth / 2 &&
                        main.mouseY >= heightY - inputAreaHeight / 2 && main.mouseY <= heightY + inputAreaHeight / 2){
                    playField = PlayField.HEIGHT;
                }

                // monster section clicked
                if(main.mouseX >= inputAreaX - inputAreaWidth / 2 && main.mouseX <= inputAreaX + inputAreaWidth / 2 &&
                        main.mouseY >= monstersY - inputAreaHeight / 2 && main.mouseY <= monstersY + inputAreaHeight / 2){
                    playField = PlayField.MONSTER;
                }

                // play button clicked
                if(main.mouseX >= centerX - widthTitleButton / 2 && main.mouseX <= centerX + widthTitleButton / 2 &&
                        main.mouseY >= playY - heightTitleButton / 2 && main.mouseY <= playY + heightTitleButton / 2){
                    main.startGame(height, width, amountMonsters);
                }

                break;
        }
    }

    private void parseInput(){
        int value = 0;
        try{
            value = Integer.parseInt(stringBuilder.toString());
        }catch(NumberFormatException e){
            // Cannot get the value, so just use the default one
        }
        switch (playField) {
            case HEIGHT:
                height = value;
                break;
            case WIDTH:
                    width = value;
                break;
            case MONSTER:
                amountMonsters = value;
                break;
        }
    }

    private void fixBounds(){
        if(height < 10){
            height = 10;
        }else if(height > 50){
            height = 50;
        }

        if(width < 10){
            width = 10;
        }else if(width > 50){
            width = 50;
        }

        if(amountMonsters < 0){
            amountMonsters = 0;
        }else if(amountMonsters > 10){
            amountMonsters = 10;
        }
    }

    private enum Mode{
        TITLE,
        WHAT_IS_THIS,
        PLAY
    }

    private enum PlayField{
        HEIGHT,
        WIDTH,
        MONSTER
    }
}