#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <windows.h>
#include <tchar.h>

void searchFiles(const TCHAR* folder, const TCHAR* searchString) {
    WIN32_FIND_DATA FindFileData;
    HANDLE hFind = INVALID_HANDLE_VALUE;
    TCHAR DirSpec[MAX_PATH];
    DWORD dwError;

    _stprintf_s(DirSpec, MAX_PATH, _T("%s\\*"), folder);
    hFind = FindFirstFile(DirSpec, &FindFileData);

    if (hFind == INVALID_HANDLE_VALUE) {
        _tprintf(_T("Invalid file handle. Error is %u\n"), GetLastError());
    }
    else {
        do {
            if (FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
                if (_tcscmp(FindFileData.cFileName, _T(".")) != 0 && _tcscmp(FindFileData.cFileName, _T("..")) != 0) {
                    _stprintf_s(DirSpec, MAX_PATH, _T("%s\\%s"), folder, FindFileData.cFileName);
                    searchFiles(DirSpec, searchString);
                }
            }
            else {
                // Open the file and search for the string
                TCHAR filePath[MAX_PATH];
                _stprintf_s(filePath, MAX_PATH, _T("%s\\%s"), folder, FindFileData.cFileName);
                FILE* file;
                errno_t err = _tfopen_s(&file, filePath, _T("r"));
                if (err != 0) {
                    _tprintf(_T("Failed to open file: %s\n"), filePath);
                }
                else {
                    TCHAR buffer[1024];
                    if (file != 0) {
                        while (_fgetts(buffer, sizeof(buffer) / sizeof(TCHAR), file) != NULL) {
                            if (_tcsstr(buffer, searchString) != NULL) {
                                _tprintf(_T("Found in file: %s\n"), filePath);
                                break;
                            }
                        }
                        fclose(file);
                    }
                }
            }
        } while (FindNextFile(hFind, &FindFileData) != 0);
        dwError = GetLastError();
        FindClose(hFind);
        if (dwError != ERROR_NO_MORE_FILES) {
            _tprintf(_T("FindNextFile error. Error is %u\n"), dwError);
        }
    }
}

int _tmain(int argc, TCHAR* argv[]) {
    const TCHAR* folderPath = _T("C:\\Users\\SEEDAGX\\source\\repos\\Grep");
    const TCHAR* searchString = _T("Grep");
    searchFiles(folderPath, searchString);
    return 0;
}