// This file (AbstractNonNativeFileExtensionWarFoundryFactory.cs) is a part of the IBBoard.WarFoundry.API project and is copyright 2007, 2008, 2009 IBBoard.
//
// The file and the library/program it is in are licensed and distributed, without warranty, under the GNU Affero GPL license, either version 3 of the License or (at your option) any later version. Please see COPYING for more information and the full license.
using System;
using System.Collections.Generic;
using System.IO;
using IBBoard.WarFoundry.API.Objects;
using IBBoard.WarFoundry.API.Loading;

namespace IBBoard.WarFoundry.API.Factories
{	
	public abstract class AbstractNonNativeFileExtensionWarFoundryFactory : AbstractNonNativeWarFoundryFactory<ILoadableObject>
	{
		protected abstract string ArmyFileExtension { get; }

		protected abstract string RaceFileExtension { get; }

		protected abstract string GameSystemFileExtension { get; }
		
		protected override bool CheckCanHandleFileFormat(ILoadableObject file)
		{
			return CheckCanHandleFileAsArmy(file) || CheckCanHandleFileAsRace(file) || CheckCanHandleFileAsGameSystem(file);
		}
		
		protected override bool CheckCanHandleFileAsArmy(ILoadableObject file)
		{
			return ArmyFileExtension != null && file.Name.ToLower().EndsWith(ArmyFileExtension);
		}
		
		protected override bool CheckCanHandleFileAsRace(ILoadableObject file)
		{
			return RaceFileExtension != null && file.Name.ToLower().EndsWith(RaceFileExtension);
		}
		
		protected override bool CheckCanHandleFileAsGameSystem(ILoadableObject file)
		{
			return GameSystemFileExtension != null && file.Name.ToLower().EndsWith(GameSystemFileExtension);
		}
		
		protected override ILoadableObject GetFileAsSupportedType(ILoadableObject file)
		{
			return file;
		}
		
		protected abstract Army CreateArmyFromFile(ILoadableObject file);

		protected abstract Race CreateRaceFromFile(ILoadableObject file);

		protected abstract GameSystem CreateGameSystemFromFile(ILoadableObject file);
		
		protected override ICollection<IWarFoundryObject> DoCreateObjectsFromFile(ILoadableObject file)
		{
			IWarFoundryObject obj = null;
			
			if (CheckCanHandleFileAsGameSystem(file))
			{
				GameSystem gameSystem = CreateGameSystemFromFile(file);
				OnGameSystemLoaded(gameSystem);
				obj = gameSystem;
			}
			else if (CheckCanHandleFileAsRace(file))
			{
				Race race = CreateRaceFromFile(file);
				OnRaceLoaded(race);
				obj = race;
			}
			else //Must have been an army file
			{
				Army army = CreateArmyFromFile(file);
				OnArmyLoaded(army);
				obj = army;
			}
			
			ICollection<IWarFoundryObject> objects = new List<IWarFoundryObject>();
			
			if (obj != null)
			{
				objects.Add(obj);
			}
			
			return objects;
		}
	}
}