package org.hedgewars.mobile;

import java.io.BufferedOutputStream;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.FileReader;

import java.io.IOException;

import java.io.InputStream;

import java.util.ArrayList;

import java.util.Arrays;

import org.xmlpull.v1.XmlPullParser;

import org.xmlpull.v1.XmlPullParserException;

import org.xmlpull.v1.XmlPullParserFactory;

import android.content.Context;

import android.content.res.TypedArray;

public class Scheme {

	public static final String DIRECTORY_SCHEME = "schemes";

	private String name;

	private ArrayList<Integer> basic;

	private ArrayList<Boolean> gamemod;

	public Scheme(String _name, ArrayList<Integer> _basic, ArrayList<Boolean> _gamemod){

		name = _name;

		basic = _basic;

		gamemod = _gamemod;

	}

	public String toString(){

		return name;

	}

	public static final int STATE_START = 0;

	public static final int STATE_ROOT = 1;

	public static final int STATE_NAME = 2;

	public static final int STATE_BASICFLAGS = 3;

	public static final int STATE_GAMEMOD = 4;

	public static final int STATE_BASICFLAG_INTEGER = 5;

	public static final int STATE_GAMEMOD_TRUE = 6;

	public static final int STATE_GAMEMOD_FALSE = 7;

	public static Scheme[] getSchemes(Context c) throws IllegalArgumentException{

		String dir = c.getFilesDir().getAbsolutePath() + '/' + DIRECTORY_SCHEME + '/';

		String[] files = new File(dir).list();

		if(files == null) files = new String[]{};

		Arrays.sort(files);

		ArrayList<Scheme> schemes = new ArrayList<Scheme>();

		try {

			XmlPullParserFactory xmlPullFactory = XmlPullParserFactory.newInstance();

			XmlPullParser xmlPuller = xmlPullFactory.newPullParser();

			for(String file : files){

				BufferedReader br = new BufferedReader(new FileReader(dir + file), 1024);

				xmlPuller.setInput(br);

				String name = null;

				ArrayList<Integer> basic = new ArrayList<Integer>();

				ArrayList<Boolean> gamemod = new ArrayList<Boolean>();

				int eventType = xmlPuller.getEventType();

				int state = STATE_START;

				while(eventType != XmlPullParser.END_DOCUMENT){

					switch(state){

					case STATE_START:

						if(eventType == XmlPullParser.START_TAG && xmlPuller.getName().equals("scheme")) state = STATE_ROOT;

						else if(eventType != XmlPullParser.START_DOCUMENT) throwException(file, eventType);

						break;

					case STATE_ROOT:

						if(eventType == XmlPullParser.START_TAG){

							if(xmlPuller.getName().equals("basicflags")) state = STATE_BASICFLAGS;

							else if(xmlPuller.getName().toLowerCase().equals("gamemod")) state = STATE_GAMEMOD;

							else if(xmlPuller.getName().toLowerCase().equals("name")) state = STATE_NAME;

							else throwException(file, eventType);

						}else if(eventType == XmlPullParser.END_TAG) state = STATE_START;

						else throwException(xmlPuller.getText(), eventType);

						break;

					case STATE_BASICFLAGS:

						if(eventType == XmlPullParser.START_TAG && xmlPuller.getName().toLowerCase().equals("integer")) state = STATE_BASICFLAG_INTEGER;

						else if(eventType == XmlPullParser.END_TAG)	state = STATE_ROOT;

						else throwException(file, eventType);

						break;

					case STATE_GAMEMOD:

						if(eventType == XmlPullParser.START_TAG){

							if(xmlPuller.getName().toLowerCase().equals("true")) state = STATE_GAMEMOD_TRUE;

							else if(xmlPuller.getName().toLowerCase().equals("false")) state = STATE_GAMEMOD_FALSE;

							else throwException(file, eventType);

						}else if(eventType == XmlPullParser.END_TAG) state = STATE_ROOT;

						else throwException(file, eventType);

						break;

					case STATE_NAME:

						if(eventType == XmlPullParser.TEXT) name = xmlPuller.getText().trim();

						else if(eventType == XmlPullParser.END_TAG) state = STATE_ROOT;

						else throwException(file, eventType);

						break;

					case STATE_BASICFLAG_INTEGER:

						if(eventType == XmlPullParser.TEXT) basic.add(Integer.parseInt(xmlPuller.getText().trim()));

						else if(eventType == XmlPullParser.END_TAG) state = STATE_BASICFLAGS;

						else throwException(file, eventType);

						break;

					case STATE_GAMEMOD_FALSE:

						if(eventType == XmlPullParser.TEXT) gamemod.add(false);

						else if(eventType == XmlPullParser.END_TAG) state = STATE_GAMEMOD;

						else throwException(file, eventType);

						break;

					case STATE_GAMEMOD_TRUE:

						if(eventType == XmlPullParser.TEXT) gamemod.add(true);

						else if(eventType == XmlPullParser.END_TAG) state = STATE_GAMEMOD;

						else throwException(file, eventType);

						break;

					}

					eventType = xmlPuller.next();

					while(eventType == XmlPullParser.TEXT && xmlPuller.isWhitespace()){//Skip whitespaces

						eventType = xmlPuller.next();

					}

				}//end while(eventtype != END_DOCUMENT

				schemes.add(new Scheme(name, basic, gamemod));

			}//end for(string file : files

			Scheme[] ret = new Scheme[schemes.size()];

			schemes.toArray(ret);

			return ret;

		} catch (XmlPullParserException e) {

			e.printStackTrace();

		} catch (FileNotFoundException e) {

			e.printStackTrace();

		} catch (IOException e) {

			e.printStackTrace();

		}

		return new Scheme[]{};//TODO handle correctly

	}

	private static void throwException(String file, int eventType){

		throw new IllegalArgumentException(String.format("Xml file: %s malformed with eventType: %d.", file, eventType));

	}

}