#include <cstdint>
#include <cstdio>
#include <iostream>
#include <filesystem>

#include <Windows.h>
#include <debugapi.h>
#include "MyZip.h"

static uint32_t g_recursive_counter = 0;

bool FileReader(MyZip &zip, std::string strInputPath, const std::filesystem::path &rootPath)
{
	using namespace std;
	bool bRet = true;

	// path class obj 생성.
	filesystem::path pathObj(strInputPath);

	// file valid check
	if (!filesystem::exists(pathObj))
	{
		printf("[ERROR](FileReader) Something went Wrong..!! \r\n");
		printf("[ERROR] File not found : %s ", pathObj.string().c_str());
		
		bRet = false;
	}
	enum class eFILETYPE
	{
		isFile, isDir, ETC
	};

	// distinguish file type
	eFILETYPE eFileDist;
	if (filesystem::is_directory(pathObj)) eFileDist = eFILETYPE::isDir;
	else if (filesystem::is_regular_file(pathObj)) eFileDist = eFILETYPE::isFile;
	else eFileDist = eFILETYPE::ETC;

	switch (eFileDist)
	{
		// case 1 : input one file
		case eFILETYPE::isFile:
		{
			// TODO : export to debugging log function
			string strDbg = "[INFO] Current Entry (File)\t: " + pathObj.string();
			strDbg += "\t Counter : " + to_string(g_recursive_counter);
			strDbg += "\r\n";
			OutputDebugStringA(strDbg.c_str());

			auto absPathOjb = filesystem::absolute(pathObj);
			bRet = zip.AddFileToZip(absPathOjb.generic_string(), pathObj.generic_string());

			break;
		}
		// case 2 : input directory
		case eFILETYPE::isDir:
		{
			// make iterator to traversal
			filesystem::directory_iterator itrDir(pathObj);

			g_recursive_counter++;
			while (itrDir != filesystem::end(itrDir))
			{
				// get entry one by one
				const filesystem::directory_entry& currentEntry = *itrDir;
				const filesystem::path& currentAbsPath = currentEntry.path();
				if (filesystem::is_directory(currentEntry))
				{
					// TODO : export to debugging log function
					string strDbg = "[INFO] Current Entry (Dir)\t: " + currentAbsPath.string();
					strDbg += "\t Counter : " + to_string(g_recursive_counter);
					strDbg += "\r\n";
					OutputDebugStringA(strDbg.c_str());

					// recursive traversal
					// TODO : bRet 쓰는 곳이 없음. 파일 처리 실패 시 어떻게 할 건지 정해야 함.
					bRet = FileReader(zip, currentAbsPath.string(), rootPath);
				}
				else if (filesystem::is_regular_file(currentEntry))
				{
					// TODO : export to debugging log function
					string strDbg = "[INFO] Current Entry (File)\t: " + currentAbsPath.string();
					strDbg += "\t Counter : " + to_string(g_recursive_counter);
					strDbg += "\r\n";
					OutputDebugStringA(strDbg.c_str());

					// archiving file
					auto relativePath = filesystem::relative(currentAbsPath, rootPath);
					// generic_string : make back-slash to OS independant delimeter ("\\" -> "/")
					// TODO : bRet 쓰는 곳이 없음. 파일 처리 실패 시 어떻게 할 건지 정해야 함.
					bRet = zip.AddFileToZip(currentAbsPath.generic_string(), relativePath.generic_string());
				}
				else
				{
					printf("[ERROR](FileReader) Something went Wrong..!! \r\n");
					printf("[ERROR](FileReader) Maybe its corrupted file. \r\n");

					bRet = false;
				}

				// step forward entry
				itrDir++;
			}
			g_recursive_counter--;

			break;
		}
		// case 3 : ERROR
		case eFILETYPE::ETC:
		{
			printf("[ERROR](FileReader) Something went Wrong..!! \r\n");
			printf("[ERROR](FileReader) Maybe its corrupted file. \r\n");

			bRet = false;
			break;
		}
		default:
			break;
	};

	// TODO : 실패 상황 별 다른 코드 부여? + 코드 별 처리 어떻게 할 건지?
	return bRet;
}

int main(int argc, char* argv[])
{
	using namespace std;

	int iRet = 0;
	printf("==================== Hello Zip! ====================\r\n");
	printf("===            Please enter Target Path          ===\r\n");
	printf("===            (FOR TEST, Input below)           ===\r\n");
	printf("===            (1 : File Test, 2 : Dir Test)     ===\r\n");
	printf("====================================================\r\n");

	string strInputPath;
	getline(cin, strInputPath);
	
	// Testing input
	if (stoi(strInputPath) == 1)
		strInputPath = INPUT_FILE_NAME;
	else if (stoi(strInputPath) == 2)
		strInputPath = INPUT_DIR_NAME;

	filesystem::path absPath = filesystem::absolute(strInputPath);
	filesystem::path rootPath = absPath.parent_path();

	// Main Zip archive method
	MyZip zip;
	if (!FileReader(zip, strInputPath, rootPath))
	{
		printf("[ ERROR ](FileReader) Somthing went Wrong... \r\n");
		iRet = -1;
	}
	else
	{
		if (!zip.FinalizeZip())
		{
			printf("[ ERROR ](Finallize) Somthing went Wrong... \r\n");
			iRet = -1;
		}
		else
		{
			printf("It Works Fine. \r\n");
			printf("==================== Good Bye Zip! =================\r\n");
			iRet = 0;
		}
	}

	return iRet;
}