/*

 * Hedgewars for Android. An Android port of Hedgewars, a free turn based strategy game

 * Copyright (c) 2011-2012 Richard Deurwaarder <xeli@xelification.com>

 * 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; version 2 of the License

 *

 * 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, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA

 */

package org.hedgewars.hedgeroid.Datastructures;

import java.util.Map;

import java.io.File;

import java.io.FilenameFilter;

import java.io.IOException;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import java.util.Map.Entry;

import java.util.TreeMap;

import org.hedgewars.hedgeroid.EngineProtocol.EngineProtocolNetwork;

import org.ini4j.Ini;

import org.ini4j.InvalidFileFormatException;

import org.ini4j.Profile.Section;

import android.content.Context;

import android.os.Parcel;

import android.os.Parcelable;

import android.util.Log;

public class Scheme implements Parcelable, Comparable<Scheme>{

	public static final String DIRECTORY_SCHEME = "schemes";

	private static final Map<String, BasicSettingMeta> basicSettingsMeta = new TreeMap<String, BasicSettingMeta>();

	private static final Map<String, GameModMeta> gameModsMeta = new TreeMap<String, GameModMeta>();

	private final String name;

	private final int gamemod;

	private final Map<String, Integer> basic = new TreeMap<String, Integer>();

	public Scheme(String _name, Map<String, Integer> _basic, int _gamemod) {

		name = _name;

		gamemod = _gamemod;

		basic.putAll(_basic);

	}

	public Scheme(Parcel in){

		name = in.readString();

		gamemod = in.readInt();

		in.readMap(basic, Integer.class.getClassLoader());

	}

	public int getHealth() {

		return basic.get("InitialHealth");

	}

	public void sendToEngine(EngineProtocolNetwork epn) throws IOException{ 

		epn.sendToEngine(String.format("e$gmflags %d", gamemod));

		for(Map.Entry<String, Integer> entry : basic.entrySet()) {

			BasicSettingMeta basicflag = basicSettingsMeta.get(entry.getKey());

			//Health is a special case, it doesn't need to be send 				                             

			//to the engine yet, we'll do that with the other HH info

			if(!basicflag.command.equals("inithealth")){

				epn.sendToEngine(String.format("%s %d", basicflag.command, entry.getValue()));

			}

		}

	}

	public String toString(){

		return name;

	}

	public static List<Scheme> getSchemes(Context c) throws IllegalArgumentException {

		File schemeDir = new File(c.getFilesDir(), DIRECTORY_SCHEME);

		File[] files = schemeDir.listFiles(new FilenameFilter() {

			public boolean accept(File dir, String filename) {

				return filename.toLowerCase().startsWith("scheme_");

			}

		});

		if(files == null) files = new File[0];

		Arrays.sort(files);

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

		for(File file : files) {

			try {

				Ini ini = new Ini(file);

				String name = ini.get("Scheme", "name");

				if(name==null) {

					name = file.getName();

				}

				Section basicSettingsSection = ini.get("BasicSettings");

				Section gameModsSection = ini.get("GameMods");

				if(basicSettingsSection == null || gameModsSection == null) {

					Log.e(Scheme.class.getCanonicalName(), "Scheme file "+file+" is missing the BasicSettings or GameMods section - skipping.");

					continue;

				}

				Map<String, Integer> basicSettings = new TreeMap<String, Integer>();

				for(Entry<String, BasicSettingMeta> entry : basicSettingsMeta.entrySet()) {

					String key = entry.getKey();

					BasicSettingMeta settingMeta = entry.getValue();

					Integer value = null;

					if(basicSettingsSection.containsKey(key)) {

						try {

							value = Integer.valueOf(basicSettingsSection.get(key));						

						} catch (NumberFormatException e) {

							// ignore

						}

					}

					if(value==null) {

						Log.w(Scheme.class.getCanonicalName(), "Scheme file "+file+" setting "+key+" is missing or invalid, using default.");

						value = settingMeta.def;

					}

					if(settingMeta.checkOverMax) {

						value = Math.min(value, settingMeta.max);

					}

					if(settingMeta.times1000) {

						value *= 1000;

					}

					basicSettings.put(key, value);						

				}

				int gamemods = 0;

				for(Entry<String, GameModMeta> entry : gameModsMeta.entrySet()) {

					String key = entry.getKey();

					GameModMeta modMeta = entry.getValue();

					if(Boolean.parseBoolean(gameModsSection.get(key))) {

						gamemods |= (1 << modMeta.bitmaskIndex);

					}

				}

				schemes.add(new Scheme(name, basicSettings, gamemods));

			} catch (InvalidFileFormatException e) {

				throw new RuntimeException(e);

			} catch (IOException e) {

				throw new RuntimeException(e);

			}

		}

		return schemes;

	}

	/**

	 * This method will parse the basic flags from a prespecified ini file.

	 * In the future we could use one provided by the Data folder.

	 */

	public static void parseConfiguration(Context c) {

		File schemeDir = new File(c.getFilesDir(), DIRECTORY_SCHEME);

		File settingsFile = new File(schemeDir, "basicsettings");

		File gameModsFile = new File(schemeDir, "gamemods");

		try {

			Ini ini = new Ini(settingsFile);

			for(Entry<String, Section> sectionEntry : ini.entrySet()) {

				basicSettingsMeta.put(sectionEntry.getKey(), new BasicSettingMeta(sectionEntry.getValue()));

			}

			ini = new Ini(gameModsFile);

			for(Entry<String, Section> sectionEntry : ini.entrySet()) {

				gameModsMeta.put(sectionEntry.getKey(), new GameModMeta(sectionEntry.getValue()));

			}

		} catch (InvalidFileFormatException e) {

			throw new RuntimeException(e);

		} catch (IOException e) {

			throw new RuntimeException(e);

		}

	}

	public int describeContents() {

		return 0;

	}

	public void writeToParcel(Parcel dest, int flags) {

		dest.writeString(name);

		dest.writeInt(gamemod);

		dest.writeMap(basic);

	}

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

		public Scheme createFromParcel(Parcel source) {

			return new Scheme(source);

		}

		public Scheme[] newArray(int size) {

			return new Scheme[size];

		}

	};

	public int compareTo(Scheme another) {

		return name.compareTo(another.name);

	}

}

class BasicSettingMeta {

	final String command;

	final String title;

	final int def;

	final int min;

	final int max;

	final boolean times1000;

	final boolean checkOverMax;

	public BasicSettingMeta(Ini.Section section) {

		command = getRequired(section, "command");

		title = section.get("title", "");

		def = Integer.parseInt(getRequired(section, "default"));

		min = Integer.parseInt(getRequired(section, "min"));

		max = Integer.parseInt(getRequired(section, "max"));

		times1000 = Boolean.parseBoolean(section.get("times1000", "false"));

		checkOverMax = Boolean.parseBoolean(section.get("checkOverMax", "false"));

	}

	private String getRequired(Ini.Section section, String key) {

		String result = section.get(key);

		if(result==null) {

			throw new IllegalArgumentException("basicsettings.ini, section "+section.getName()+" is missing required setting "+key+".");

		}

		return result;

	}

	@Override

	public String toString() {

		return String

				.format("BasicSettingMeta [command=%s, title=%s, def=%s, min=%s, max=%s, times1000=%s, checkOverMax=%s]",

						command, title, def, min, max, times1000, checkOverMax);

	}

}

// TODO: Extend with additional metadata

class GameModMeta {

	final int bitmaskIndex;

	public GameModMeta(Ini.Section section) {

		bitmaskIndex = Integer.parseInt(getRequired(section, "bitmaskIndex"));

	}

	private String getRequired(Ini.Section section, String key) {

		String result = section.get(key);

		if(result==null) {

			throw new IllegalArgumentException("gamemods.ini, section "+section.getName()+" is missing required setting "+key+".");

		}

		return result;

	}

	@Override

	public String toString() {

		return String.format("GameModMeta [bitmaskIndex=%s]", bitmaskIndex);

	}

}