//cli_parser.cpp
#include "cli_parser.h"
#include <getopt.h>
#include <iostream>

void config::parseCommandLine(int argc, char *argv[]) {
    const struct option longOptions[] = {
            {"host",    required_argument, nullptr, 'h'},
            {"port",    required_argument, nullptr, 'p'},
            {"vhost",   required_argument, nullptr, 'v'},
            {"vport",   required_argument, nullptr, 'b'},
            {"version", required_argument, nullptr, 'r'},
            {"state",   required_argument, nullptr, 's'},
            {"minimal",   no_argument, nullptr, 'm'},
            {"help",    no_argument,       nullptr, 0},
            {nullptr, 0,                   nullptr, 0}
    };

    int opt;
    bool minimal = false;
    while ((opt = getopt_long(argc, argv, "h:p:v:b:r:s:m:", longOptions, nullptr)) != -1) {
        switch (opt) {
            case 'h':
                hostname = optarg;
                break;
            case 'p':
                port = std::stoi(optarg);
                break;
            case 'v':
                virtualHostname = optarg;
                break;
            case 'b':
                virtualPort = std::stoi(optarg);
                break;
            case 'r':
                protocolVersion = std::stoi(optarg);
                break;
            case 's':
                nextState = std::stoi(optarg);
                break;
            case 'm':
                nextState = 1;
                protocolVersion = -1;
                virtualPort = 0;
                virtualHostname = "";
                minimal = true;
                break;
            case 0: // --help
                printHelp();
                exit(0);
            default: // '?'
                printHelp();
                exit(1);
        }
    }

    if (hostname.empty()) {
        std::cerr << "Error: Hostname is required.\n";
        printHelp();
        exit(1);
    }

    if (virtualHostname.empty() && !minimal) {
        virtualHostname = hostname;  // Default to real hostname
    }
}

void config::printHelp() {
    std::cout << "Usage: mcpinger [options]\n"
              << "Options:\n"
              << "  --host <hostname>        Real server hostname (required)\n"
              << "  --port <port>            Real server port (default 25565)\n"
              << "  --vhost <virtual host>   Virtual hostname (default is same as host)\n"
              << "  --vport <virtual port>   Virtual port (default is same as port)\n"
              << "  --version <protocol>     Protocol version (default -1)\n"
              << "  --state <next state>     Next state (default 1, status request)\n"
              << "  --help                   Show this help message\n";
}