package de.srsoftware.web4rail.tiles;

import java.io.File;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Scanner;
import java.util.Vector;

import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import de.keawe.tools.translations.Translation;
import de.srsoftware.tools.Tag;
import de.srsoftware.web4rail.Application;
import de.srsoftware.web4rail.Connector;
import de.srsoftware.web4rail.Window;

public abstract class Tile {
	
	protected int x = -1,y = -1;
	protected HashSet<String> classes = new HashSet<String>();
	protected static Logger LOG = LoggerFactory.getLogger(Tile.class);
	
	public Tile() {
		classes.add("tile");
		classes.add(getClass().getSimpleName());
	}
	
	public JSONObject config() {
		return new JSONObject();
	}
	
	public List<Connector> connections(String from){
		return new Vector<>();
	}


	public void configure(JSONObject config) {}
	
	public int height() {
		return 1;
	}
	
	public int len() {
		return 1;
	}
	
	public Tile position(int x, int y) {
		this.x = x;
		this.y = y;
		return this;
	}
	
	public Tag propForm() {
		return null;
	}
	
	public Tag propMenu() {	
		Window menu = new Window("tile-properties",t("Properties of {} @ ({},{})",getClass().getSimpleName(),x,y));
		Tag form = propForm();
		if (form!=null) {
			new Tag("button").attr("type", "submit").content(t("save")).addTo(form);
			form.addTo(menu);
		} else {
			menu.content(t("This tile ({}) has no properties",getClass().getSimpleName()));
		}
		return menu;
	}

	public Tag tag(Map<String,Object> replacements) throws IOException {
		int width = 100*len();
		int height = 100*height();
		if (replacements == null) replacements = new HashMap<String, Object>();
		replacements.put("%width%",width);
		replacements.put("%height%",height);
		String style = "";
		Tag svg = new Tag("svg")
				.id((x!=-1 && y!=-1)?("tile-"+x+"-"+y):(getClass().getSimpleName()))
				.clazz(classes)
				.size(100,100)
				.attr("name", getClass().getSimpleName())
				.attr("viewbox", "0 0 "+width+" "+height);
				if (x>-1) style="left: "+(30*x)+"px; top: "+(30*y)+"px;";
				if (len()>1) style+=" width: "+(30*len())+"px;";
				if (height()>1) style+=" height: "+(30*height())+"px;";
		if (!style.isEmpty()) svg.style(style);

		File file = new File(System.getProperty("user.dir")+"/resources/svg/"+getClass().getSimpleName()+".svg");
		if (file.exists()) {
			Scanner scanner = new Scanner(file, StandardCharsets.UTF_8);
			StringBuffer sb = new StringBuffer();
			while (scanner.hasNextLine()) {
				String line = scanner.nextLine();
				if (line.startsWith("<svg") || line.endsWith("svg>")) continue;
				for (Entry<String, Object> replacement : replacements.entrySet()) {
					line = replace(line,replacement);
				}
				sb.append(line+"\n");
			}
			scanner.close();
			svg.content(sb.toString());
		} else {
			new Tag("title").content(t("No display defined for this tile ({})",getClass().getSimpleName())).addTo(svg);
			new Tag("text")
				.pos(35,70)	
				.content("?")
				.addTo(svg);
		}
		
		return svg;
	}

	private static String replace(String line, Entry<String, Object> replacement) {
		String key = replacement.getKey();
		Object val = replacement.getValue();
		int start = line.indexOf(key);
		int len = key.length();
		while (start>0) {
			int end = line.indexOf("\"",start);
			int end2 = line.indexOf("<",start);
			if (end2>0 && (end<0 || end2<end)) end=end2;
			String tag = line.substring(start, end);
			if (tag.length()>len) {
				val = Integer.parseInt(tag.substring(len)) + (int) val;
			}
			line = line.replace(tag, ""+val);
			start = line.indexOf(key);
		}
		return line;
	}

	protected static String t(String txt, Object...fills) {
		return Translation.get(Application.class, txt, fills);
	}	
	
	@Override
	public String toString() {
		return t("{}({},{})",getClass().getSimpleName(),x,y) ;
	}

	public Tile update(HashMap<String, String> params) {
		LOG.debug("{}.update({})",getClass().getSimpleName(),params);
		return this;
	}
}