//
//  ZipFileSystem.h
//  OpenSpades
//
//  Created by yvt on 8/8/13.
//  Copyright (c) 2013 yvt.jp. All rights reserved.
//

#pragma once

#include "IFileSystem.h"
#include <stdint.h>

extern "C"{
	typedef void *unzFile;
	struct zlib_filefunc_def_s;
	typedef struct zlib_filefunc_def_s zlib_filefunc_def;
}
	
namespace spades {
	class ZipFileSystem: public IFileSystem {
		class ZipFileInputStream;
		class ZipFileHandle;
		
		IStream *baseStream;
		bool autoClose;
		unzFile zip;
		
		ZipFileInputStream *currentStream;
		
		uint64_t cursorPos;
		
		static ZipFileHandle *InternalOpen(ZipFileSystem *fs,
										   const char *fn,
										   int mode);
		
		static uint32_t InternalRead(ZipFileSystem *fs,
										   ZipFileHandle *h,
										   void *buf, uint32_t size);
		static uint32_t InternalWrite(ZipFileSystem *fs,
										   ZipFileHandle *h,
										   void *buf, uint32_t size);
		static long InternalTell(ZipFileSystem *fs,
									  ZipFileHandle *h);
		static long InternalSeek(ZipFileSystem *fs,
								 ZipFileHandle *h,
								 int32_t offset, int origin);
		static int InternalClose(ZipFileSystem *fs,
								 ZipFileHandle *h);
		static int InternalTestError(ZipFileSystem *fs,
								 ZipFileHandle *h);
		
		zlib_filefunc_def CreateZLibFileFunc();
	public:
		ZipFileSystem(IStream *, bool autoClose = true);
		virtual ~ZipFileSystem();
		
		virtual std::vector<std::string> EnumFiles(const char *);
		
		virtual IStream *OpenForReading(const char *);
		virtual IStream *OpenForWriting(const char *);
		virtual bool FileExists(const char *);
	};
}