package gamegui;

import java.awt.image.ImageObserver;
import java.awt.Image;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;
import java.awt.Font;
import java.awt.FontMetrics;
import java.util.ArrayList;

public class MultiTextbox extends Textbox {
    ArrayList<String> lstStrings;
    FontMetrics metrics;
    boolean active;
    
    public MultiTextbox(final String newName, final int newX, final int newY, final int newWidth, final int newHeight, final String newLabel, final boolean isActive, final Font newFont, final FontMetrics newMetrics) {
        super(newName, newX, newY, newWidth, newHeight, newLabel, newFont, false);
        this.lstStrings = new ArrayList<String>();
        this.metrics = newMetrics;
        this.active = isActive;
        this.splitString();
    }
    
    public void append(final String str) {
        if (this.getText().equals("")) {
            this.setText(str);
        }
        else {
            this.setText(String.valueOf(this.getText()) + "\n" + str);
        }
        this.splitString();
        if (this.lstStrings.size() * 15 + 6 > this.getHeight()) {
            this.getScrollBar().setSize(this.getScrollBar().getMaxSize() * this.getHeight() / (this.lstStrings.size() * 15 + 6));
        }
        else {
            this.getScrollBar().setSize(this.getScrollBar().getMaxSize());
        }
        this.getScrollBar().setPosition(this.getScrollBar().getMaxSize() - this.getScrollBar().getSize());
    }
    
    @Override
    public void setText(final String s) {
        super.setText(s);
        this.splitString();
    }
    
    @Override
    public void clear() {
        super.clear();
        this.lstStrings = new ArrayList<String>();
    }
    
    @Override
    public boolean handleEvent(final MouseEvent e) {
        if (!this.getScrollBar().handleEvent(e)) {
            return false;
        }
        if (e.getY() < this.getY() + this.getWidth()) {
            this.changeTextStart(-30);
        }
        else if (this.getY() + this.getHeight() - this.getWidth() < e.getY()) {
            this.changeTextStart(30);
        }
        return true;
    }
    
    @Override
    public void handleEvent(final KeyEvent e) {
        if (!this.active) {
            return;
        }
        super.handleEvent(e);
        this.splitString();
        if (this.lstStrings.size() * 15 + 6 > this.getHeight()) {
            this.getScrollBar().setSize(this.getScrollBar().getMaxSize() * this.getHeight() / (this.lstStrings.size() * 15 + 6));
        }
        else {
            this.getScrollBar().setSize(this.getScrollBar().getMaxSize());
        }
        this.getScrollBar().setPosition(this.getScrollBar().getMaxSize() - this.getScrollBar().getSize());
    }
    
    private void changeTextStart(final int increment) {
        this.setTextStart(this.getTextStart() + increment);
        if (this.lstStrings.size() * 15 + 6 > this.getHeight() && this.getTextStart() >= this.lstStrings.size() * 15 + 6 - this.getHeight()) {
            this.setTextStart(this.lstStrings.size() * 15 + 6 - this.getHeight());
            this.getScrollBar().setPosition(this.getScrollBar().getMaxSize() - this.getScrollBar().getSize());
        }
        else if (this.getTextStart() < 0 || this.lstStrings.size() * 15 + 6 <= this.getHeight()) {
            this.setTextStart(0);
            this.getScrollBar().setPosition(0);
        }
        else {
            this.getScrollBar().setPosition(this.getTextStart() * this.getScrollBar().getMaxSize() / (this.lstStrings.size() * 15 + 6));
        }
    }
    
    private void splitString() {
        String drawnString = this.getText();
        final ArrayList<String> lstTemp = new ArrayList<String>();
        do {
            int x = 0;
            int lastSpace = -1;
            while (x < drawnString.length() && this.metrics.stringWidth(drawnString.substring(0, x + 1)) <= this.getWidth() - 10 && !drawnString.substring(x, x + 1).equals("\n")) {
                if (drawnString.charAt(x) == ' ') {
                    lastSpace = x;
                }
                ++x;
            }
            final int xReal = x;
            if (lastSpace > 0 && drawnString.length() > x) {
                x = lastSpace + 1;
            }
            if (drawnString.length() > xReal && drawnString.substring(xReal, xReal + 1).equals("\n")) {
                lstTemp.add(drawnString.substring(0, xReal));
                drawnString = drawnString.substring(xReal + 1);
            }
            else {
                lstTemp.add(drawnString.substring(0, x));
                drawnString = drawnString.substring(x);
            }
        } while (this.metrics.stringWidth(drawnString) > 0);
        if (lstTemp.size() * 15 - this.getHeight() + 6 > 0) {
            this.setTextStart(lstTemp.size() * 15 - this.getHeight() + 6);
        }
        else {
            this.setTextStart(0);
        }
        this.lstStrings = lstTemp;
    }
    
    @Override
    public void draw(final Graphics g) {
        if (this.isSelected() && System.currentTimeMillis() - this.getLastCursorChange() > this.getBlinkInterval()) {
            if (this.getCursorState() == 0) {
                this.setCursorState(1);
            }
            else {
                this.setCursorState(0);
            }
            this.setLastCursorChange(System.currentTimeMillis());
        }
        this.srcGraphics.setColor(new Color(0, 160, 0));
        this.srcGraphics.setFont(this.getFont());
        for (int x = 0; x < this.lstStrings.size(); ++x) {
            this.srcGraphics.drawString(this.lstStrings.get(x), 5, this.metrics.getHeight() + x * 15 - this.getTextStart());
        }
        g.drawImage(this.source, this.getX(), this.getY(), null);
        g.setColor(Color.red);
        if (!this.noBorder) {
            g.drawRect(this.getX(), this.getY(), this.getWidth(), this.getHeight());
        }
    }
}