package org.hedgewars.mobile;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileReader;

import java.io.IOException;

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;

public class Weapon {

	public static final String DIRECTORY_WEAPON = "weapons";

	private String name;

	private String QT;

	private String prob;

	private String delay;

	private String crate;

	public Weapon(String _name, String _QT, String _prob, String _delay, String _crate){

		name = _name;

		QT = _QT;

		prob = _prob;

		delay = _delay;

		crate = _crate;

	}

	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_QT = 3;

	public static final int STATE_PROBABILITY = 4;

	public static final int STATE_DELAY = 5;

	public static final int STATE_CRATE = 6;

	public static Weapon[] getWeapons(Context c) throws IllegalArgumentException{

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

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

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

		Arrays.sort(files);

		ArrayList<Weapon> weapons = new ArrayList<Weapon>();

		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;

				String qt = null;

				String prob = null;

				String delay = null;

				String crate = null;

				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("weapon")) state = STATE_ROOT;

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

						break;

					case STATE_ROOT:

						if(eventType == XmlPullParser.START_TAG){

							if(xmlPuller.getName().toLowerCase().equals("qt")) state = STATE_QT;

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

							else if(xmlPuller.getName().toLowerCase().equals("probability")) state = STATE_PROBABILITY;

							else if(xmlPuller.getName().toLowerCase().equals("delay")) state = STATE_DELAY;

							else if(xmlPuller.getName().toLowerCase().equals("crate")) state = STATE_CRATE;

							else throwException(file, eventType);

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

						else throwException(xmlPuller.getText(), 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_QT:

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

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

						else throwException(file, eventType);

						break;

					case STATE_PROBABILITY:

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

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

						else throwException(file, eventType);

						break;

					case STATE_DELAY:

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

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

						else throwException(file, eventType);

						break;

					case STATE_CRATE:

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

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

						else throwException(file, eventType);

						break;

					}

					eventType = xmlPuller.next();

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

						eventType = xmlPuller.next();

					}

				}//end while(eventtype != END_DOCUMENT

				weapons.add(new Weapon(name, qt, prob, delay, crate));

			}//end for(string file : files

			Weapon[] ret = new Weapon[weapons.size()];

			weapons.toArray(ret);

			return ret;

		} catch (XmlPullParserException e) {

			e.printStackTrace();

		} catch (FileNotFoundException e) {

			e.printStackTrace();

		} catch (IOException e) {

			e.printStackTrace();

		}

		return new Weapon[]{};//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));

	}

}