package org.hedgewars.hedgeroid.Datastructures;

import java.io.File;

import java.io.IOException;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

import org.hedgewars.hedgeroid.frontlib.Flib;

import org.hedgewars.hedgeroid.frontlib.Frontlib.WeaponsetListPtr;

import android.content.Context;

public final class Weaponsets {

	private Weaponsets() {

		throw new AssertionError("This class is not meant to be instantiated");

	}

	public static File getUserWeaponsetsFile(Context c) {

		return new File(c.getFilesDir(), "weapons_user.ini");

	}

	public static File getBuiltinWeaponsetsFile(Context c) {

		return new File(c.getFilesDir(), "weapons_builtin.ini");

	}

	public static List<Weaponset> loadAllWeaponsets(Context c) throws IOException {

		List<Weaponset> result = loadBuiltinWeaponsets(c);

		result.addAll(loadUserWeaponsets(c));

		return result;

	}

	public static List<Weaponset> loadUserWeaponsets(Context c) throws IOException {

		return loadWeaponsets(c, getUserWeaponsetsFile(c));

	}

	public static List<Weaponset> loadBuiltinWeaponsets(Context c) throws IOException {

		return loadWeaponsets(c, getBuiltinWeaponsetsFile(c));

	}

	public static List<Weaponset> loadWeaponsets(Context c, File weaponsetFile) throws IOException {

		if(!weaponsetFile.isFile()) {

			// No file == no weaponsets, no error

			return new ArrayList<Weaponset>();

		}

		WeaponsetListPtr weaponsetListPtr = null;

		try {

			weaponsetListPtr = Flib.INSTANCE.flib_weaponsetlist_from_ini(weaponsetFile.getAbsolutePath());

			if(weaponsetListPtr == null) {

				throw new IOException("Unable to read weaponsets from "+weaponsetFile);

			}

			return weaponsetListPtr.deref();

		} finally {

			if(weaponsetListPtr != null) {

				Flib.INSTANCE.flib_weaponsetlist_destroy(weaponsetListPtr);

			}

		}

	}

	public static void saveUserWeaponsets(Context c, List<Weaponset> weaponsets) throws IOException {

		WeaponsetListPtr ptr = WeaponsetListPtr.createJavaOwned(weaponsets);

		Flib.INSTANCE.flib_weaponsetlist_to_ini(getUserWeaponsetsFile(c).getAbsolutePath(), ptr);

	}

	public static void deleteUserWeaponset(Context c, String setToDelete) throws IOException {

		List<Weaponset> userWeaponsets = loadUserWeaponsets(c);

		for(Iterator<Weaponset> iter = userWeaponsets.iterator(); iter.hasNext();) {

			Weaponset set = iter.next();

			if(set.name.equals(setToDelete)) {

				iter.remove();

				break;

			}

		}

		saveUserWeaponsets(c, userWeaponsets);

	}

	public static List<String> toNameList(List<Weaponset> weaponsets) {

		List<String> result = new ArrayList<String>();

		for(Weaponset weaponset : weaponsets) {

			result.add(weaponset.name);

		}

		return result;

	}

}