package org.hedgewars.mobile.EngineProtocol;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileReader;

import java.io.IOException;

import java.io.OutputStream;

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.os.Parcel;

import android.os.Parcelable;

public class Weapon implements Parcelable{

	public static final String DIRECTORY_WEAPON = "weapons";

	private String name;

	private String QT;

	private String prob;

	private String delay;

	private String crate;

	private static int maxWeapons;

	static{

		//maxWeapons = PascalExports.HWgetNumberOfWeapons();

	}

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

		name = _name;

		//Incase there's a newer ammoStore which is bigger we append with zeros

		StringBuffer sb = new StringBuffer();

		while(_QT.length() + sb.length() < maxWeapons){

			sb.append('0');

		}

		QT = String.format("e%s %s%s", "ammloadt", _QT, sb);

		prob = String.format("e%s %s%s", "ammprob", _prob, sb);

		delay = String.format("e%s %s%s", "ammdelay", _delay, sb);

		crate = String.format("e%s %s%s", "ammreinf", _crate, sb);

	}

	public Weapon(Parcel in){

		readFromParcel(in);

	}

	public String toString(){

		return name;

	}

	public void sendToEngine(OutputStream os, int teamsCount) throws IOException{

		os.write(QT.getBytes());//command prefix is already in string 

		os.write(prob.getBytes());

		os.write(delay.getBytes());

		os.write(crate.getBytes());

		byte[] ammstore = "eammstore".getBytes();

		for(int i = 0; i < teamsCount; i++){

			os.write(ammstore);

		}

		os.flush();

	}

	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 ArrayList<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

			return weapons;

		} catch (XmlPullParserException e) {

			e.printStackTrace();

		} catch (FileNotFoundException e) {

			e.printStackTrace();

		} catch (IOException e) {

			e.printStackTrace();

		}

		return new ArrayList<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));

	}

	public int describeContents() {

		return 0;

	}

	public void writeToParcel(Parcel dest, int flags) {

		dest.writeString(name);

		dest.writeString(QT);

		dest.writeString(prob);

		dest.writeString(delay);

		dest.writeString(crate);

	}

	private void readFromParcel(Parcel src){

		name = src.readString();

		QT = src.readString();

		prob = src.readString();

		delay = src.readString();

		crate = src.readString();

	}

	public static final Parcelable.Creator<Weapon> CREATOR = new Parcelable.Creator<Weapon>() {

		public Weapon createFromParcel(Parcel source) {

			return new Weapon(source);

		}

		public Weapon[] newArray(int size) {

			return new Weapon[size];

		}

	};

}