#include <alignment/utils/FileUtils.hpp>

bool FileExists(std::string &fileName)
{
    FILE *fp = fopen(fileName.c_str(), "r");
    if (fp) {
        // exists
        fclose(fp);
        return true;
    } else {
        return false;
    }
}

void CriticalOpenRead(std::string &fileName, std::ifstream &file, std::ios::openmode mode)
{
    file.open(fileName.c_str(), mode | std::ios::in);
    if (!file.good()) {
        std::cerr << "Could not open file:" << fileName << std::endl;
        std::exit(EXIT_FAILURE);
    }
}

int OpenRead(std::string &fileName, std::ifstream &file, std::ios::openmode mode)
{
    file.open(fileName.c_str(), mode | std::ios::in);
    return file.good();
}

void CriticalOpenWrite(std::string &fileName, std::ofstream &file, std::ios::openmode mode)
{
    file.open(fileName.c_str(), mode | std::ios::out);
    if (!file.good()) {
        std::cerr << "Could not open file: " << fileName << std::endl;
        std::exit(EXIT_FAILURE);
    }
}

int OpenWrite(std::string &fileName, std::ofstream &file, std::ios::openmode mode)
{
    file.open(fileName.c_str(), mode | std::ios::out);
    return file.good();
}

int CountLinesInFile(std::string fileName)
{
    char *filePtr;
    long fileSize;
    int fileDes;
    fileDes = open(fileName.c_str(), O_RDONLY);
    fileSize = lseek(fileDes, 0, SEEK_END);
    lseek(fileDes, 0, SEEK_SET);
    filePtr = (char *)mmap(0, fileSize, PROT_READ, MAP_PRIVATE, fileDes, 0);
    long pos;
    int numLines = 0;
    for (pos = 0; pos < fileSize; pos++, filePtr++) {
        if (*filePtr == '\n') {
            numLines++;
        }
    }
    return numLines;
}