/*
 Copyright (c) 2013 yvt

 This file is part of OpenSpades.

 OpenSpades 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, either version 3 of the License, or
 (at your option) any later version.

 OpenSpades 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 OpenSpades.  If not, see <http://www.gnu.org/licenses/>.

 */

#pragma once

#include <cstdint>
#include <map>
#include <string>

#include "IFileSystem.h"

extern "C" {
typedef void *unzFile;
struct zlib_filefunc_def_s;
typedef struct zlib_filefunc_def_s zlib_filefunc_def;
struct unz_file_pos_s;
}

namespace spades {
	class ZipFileSystem : public IFileSystem {
		class ZipFileInputStream;
		class ZipFileHandle;

		IStream *baseStream;
		bool autoClose;
		unzFile zip;

		std::map<std::string, unz_file_pos_s> files;

		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();
		bool MoveToFile(const char *);

	public:
		ZipFileSystem(IStream *, bool autoClose = true);
		~ZipFileSystem();

		std::vector<std::string> EnumFiles(const char *) override;

		std::unique_ptr<IStream> OpenForReading(const char *) override;
		std::unique_ptr<IStream> OpenForWriting(const char *) override;
		bool FileExists(const char *) override;
	};
}