#include "cat-file.h"

#include <iostream>
#include <filesystem>
#include <fstream>
#include <string>
#include <string_view>

#include "zstr.hpp"

int catFile(const int argc, const char** argv)
{
    if (argc < 4)
    {
        std::cerr << "please provide proper arguments. example '-p <blob_sha>'.\n";
        return 1;
    }

    const std::string flag = argv[2];
    if (flag != "-p")
    {
        std::cerr << flag << "is an invalid flag, please use \"-p\"\n";
        return 1;
    }

    const std::string input = argv[3];
    const std::string dir = input.substr(0, 2);
    const std::string file = input.substr(2);

    zstr::ifstream inputFile("./.git/objects/" + dir + "/" + file, std::ofstream::binary);
    if (!inputFile.is_open())
    {
        std::cerr << "Could not open file\n";
        return 1;
    }

    const std::string output{std::istreambuf_iterator<char>(inputFile), std::istreambuf_iterator<char>()};
    std::cout << std::string_view(output).substr(output.find('\0') + 1);
    inputFile.close();

    return 0;
}