/*
 * Pixel Dungeon
 * Copyright (C) 2012-2015 Oleg Dolya
 *
 * Shattered Pixel Dungeon
 * Copyright (C) 2014-2019 Evan Debenham
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */

package com.shatteredpixel.shatteredpixeldungeon.ui;

import com.shatteredpixel.shatteredpixeldungeon.scenes.PixelScene;
import com.shatteredpixel.shatteredpixeldungeon.sprites.CharSprite;
import com.shatteredpixel.shatteredpixeldungeon.utils.GLog;
import com.watabou.noosa.ui.Component;
import com.watabou.utils.Signal;

import java.util.ArrayList;
import java.util.regex.Pattern;

public class GameLog extends Component implements Signal.Listener<String> {
	
	private static final int MAX_LINES = 3;
	
	private static final Pattern PUNCTUATION = Pattern.compile( ".*[.,;?! ]$" );
	
	private RenderedTextBlock lastEntry;
	private int lastColor;
	
	private static ArrayList<Entry> entries = new ArrayList<>();
	
	public GameLog() {
		super();
		GLog.update.replace( this );
		
		recreateLines();
	}
	
	private static ArrayList<String> textsToAdd = new ArrayList<>();
	
	@Override
	public synchronized void update() {
		for (String text : textsToAdd){
			if (length != entries.size()){
				clear();
				recreateLines();
			}
			
			int color = CharSprite.DEFAULT;
			if (text.startsWith( GLog.POSITIVE )) {
				text = text.substring( GLog.POSITIVE.length() );
				color = CharSprite.POSITIVE;
			} else
			if (text.startsWith( GLog.NEGATIVE )) {
				text = text.substring( GLog.NEGATIVE.length() );
				color = CharSprite.NEGATIVE;
			} else
			if (text.startsWith( GLog.WARNING )) {
				text = text.substring( GLog.WARNING.length() );
				color = CharSprite.WARNING;
			} else
			if (text.startsWith( GLog.HIGHLIGHT )) {
				text = text.substring( GLog.HIGHLIGHT.length() );
				color = CharSprite.NEUTRAL;
			}
			
			if (lastEntry != null && color == lastColor && lastEntry.nLines < MAX_LINES) {
				
				String lastMessage = lastEntry.text();
				lastEntry.text( lastMessage.length() == 0 ? text : lastMessage + " " + text );
				
				entries.get( entries.size() - 1 ).text = lastEntry.text();
				
			} else {
				
				lastEntry = PixelScene.renderTextBlock( text, 6 );
				lastEntry.setHightlighting( false );
				lastEntry.hardlight( color );
				lastColor = color;
				add( lastEntry );
				
				entries.add( new Entry( text, color ) );
				
			}
			
			if (length > 0) {
				int nLines;
				do {
					nLines = 0;
					for (int i = 0; i < length-1; i++) {
						nLines += ((RenderedTextBlock) members.get(i)).nLines;
					}
					
					if (nLines > MAX_LINES) {
						RenderedTextBlock r = ((RenderedTextBlock) members.get(0));
						remove(r);
						r.destroy();
						
						entries.remove( 0 );
					}
				} while (nLines > MAX_LINES);
				if (entries.isEmpty()) {
					lastEntry = null;
				}
			}
		}
		
		if (!textsToAdd.isEmpty()){
			layout();
			textsToAdd.clear();
		}
		super.update();
	}
	
	private synchronized void recreateLines() {
		for (Entry entry : entries) {
			lastEntry = PixelScene.renderTextBlock( entry.text, 6 );
			lastEntry.hardlight( lastColor = entry.color );
			add( lastEntry );
		}
	}
	
	public synchronized void newLine() {
		lastEntry = null;
	}
	
	@Override
	public synchronized void onSignal( String text ) {
		textsToAdd.add(text);
	}
	
	@Override
	protected void layout() {
		float pos = y;
		for (int i=length-1; i >= 0; i--) {
			RenderedTextBlock entry = (RenderedTextBlock)members.get( i );
			entry.maxWidth((int)width);
			entry.setPos(x, pos-entry.height());
			pos -= entry.height()+2;
		}
	}
	
	@Override
	public void destroy() {
		GLog.update.remove( this );
		super.destroy();
	}
	
	private static class Entry {
		public String text;
		public int color;
		public Entry( String text, int color ) {
			this.text = text;
			this.color = color;
		}
	}
	
	public static void wipe() {
		entries.clear();
	}
}
