#include <iostream>
#include <fstream>
#include <ostream>
#include <string>
#include <vector>
#include <regex>

class log_entry {
public:
    std::string ip;
    std::string timestamp;
    std::string request;
    std::string status;
    std::string bytes;
    std::string referer;
    std::string os;
    std::string browser;

    log_entry(const std::smatch& match) {
        ip        = match[1].str();
        timestamp = match[2].str();
        request   = match[3].str();
        status    = match[4].str();
        bytes     = match[5].str();
        referer   = match[6].str();

        std::string raw_ua = match[7].str();
        
        if (raw_ua.find("Windows NT 10.0") != std::string::npos)       os = "Windows 10/11";
        else if (raw_ua.find("Windows NT 6.1") != std::string::npos)   os = "Windows 7";
        else if (raw_ua.find("iPhone") != std::string::npos)           os = "iOS (iPhone)";
        else if (raw_ua.find("iPad") != std::string::npos)             os = "iOS (iPad)";
        else if (raw_ua.find("Android") != std::string::npos)          os = "Android";
        else if (raw_ua.find("Macintosh") != std::string::npos)        os = "macOS";
        else if (raw_ua.find("Linux") != std::string::npos)            os = "Linux";
        else os = "Unknown OS";

        if (raw_ua.find("Edg/") != std::string::npos)                  browser = "Microsoft Edge";
        else if (raw_ua.find("OPR/") != std::string::npos)             browser = "Opera";
        else if (raw_ua.find("Chrome/") != std::string::npos)          browser = "Google Chrome";
        else if (raw_ua.find("Safari/") != std::string::npos)          browser = "Apple Safari";
        else if (raw_ua.find("Firefox/") != std::string::npos)         browser = "Mozilla Firefox";
        else if (raw_ua.find("curl/") != std::string::npos)            browser = "curl (CLI Tool)";
        else browser = "Unknown Browser/Bot";
    }
};

int main(int argc, char* argv[]) {
    std::ifstream file(argv[1]);

    if(!file.is_open()) {
        std::cerr << "Error loading " << argv[1] << std::endl;
        return 1;
    }


    std::vector<std::string> lines;
    std::string line;
    while(std::getline(file, line)){
        lines.push_back(std::move(line));
    }
    file.close();

    std::vector<log_entry> all_logs;
    std::regex log_pattern(R"((\S+)\s+-\s+-\s+\[([^\]]+)\]\s+\"([^\"]+)\"\s+(\d+)\s+(\d+|-)\s+\"([^\"]*)\"\s+\"([^\"]*)\")");

    for(const auto& log_line : lines) {
        std::smatch match;
        if(std::regex_search(log_line, match, log_pattern)) {
            all_logs.emplace_back(match);
        }
    }

    for (size_t i = 0; i < all_logs.size(); ++i) {
        std::cout << "Entry #" << i + 1 << ":\n"
                << "  IP:      " << all_logs[i].ip << "\n"
                << "  OS:      " << all_logs[i].os << "\n"
                << "  Browser: " << all_logs[i].browser << "\n"
                << "  Status:  " << all_logs[i].status << "\n\n";
    }

    return 0;
}