#include <opts.h>
#include <iostream>
#include <stdexcept>
#include <getopt.h>
#include <string>
#include <vector>
#include <sys/stat.h>
#include <sstream>


struct option OptionParser::longOptions[] = {
    {"devicespec", required_argument, 0, 's'},
    {"spec", required_argument, 0, 's'},
    {"devspec", required_argument, 0, 's'},
    {"devfile", required_argument, 0, 'd'},
    {"devicefile", required_argument, 0, 'd'},
    {"sense-api-lib", required_argument, 0, 'a'},
    {"senseapi", required_argument, 0, 'a'},
    {"sense-api-path", required_argument, 0, 'p'},
    {"verbose", no_argument, 0, 'v'},
    {"help", no_argument, 0, '?'},
    {0, 0, 0, 0}
};

void OptionParser::parseArguments(int argc, char *argv[], char **envp)
{
    (void)envp;
    int opt;
    int optionIndex = 0;

    argv0 = argv[0];

    optind = 1; // Reset optind to 1 before parsing
    while ((opt = getopt_long(
        argc, argv, "s:d:a:p:v?", longOptions, &optionIndex)) != -1)
    {
        switch (opt)
        {
        case 's':
            if (!deviceSpecs.empty()) {
                deviceSpecs += "||";
            }
            deviceSpecs += std::string(optarg);
            break;
        case 'd':
            deviceSpecFiles.push_back(optarg);
            break;
        case 'a':
            senseApiLibs.push_back(optarg);
            break;
        case 'p':
        {
            struct stat info;

            if (!senseApiLibPath.empty())
            {
                std::cerr << std::string(__func__)
                    + " - Overwriting previous sense-api-path with: " << optarg
                    << '\n';
            }

            if (stat(optarg, &info) != 0 || !(info.st_mode & S_IFDIR))
            {
                throw std::invalid_argument(
                    std::string(__func__) + " - The specified path is not a "
                    "directory: " + optarg);
            }

            senseApiLibPath = optarg;
            break;
        }
        case 'v':
            verbose = true;
            break;
        case '?':
            printUsage = true;
            return;
        default:
            throw std::invalid_argument(
                std::string(__func__) + " - Invalid argument encountered: "
                + std::string(argv[optind - 1]));
        }
    }
}

std::string OptionParser::getUsage() const
{
    return "Usage: " + argv0 + " [-s|--devicespec|--spec|--devspec <device_spec>] "
           "[-d|--devfile|--devicefile <filename>] "
           "[-a|--sense-api-lib|--senseapi <filename>] "
           "[-p|--sense-api-path <directory>] "
           "[-v|--verbose] "
           "[-?|--help]";
}

std::string OptionParser::stringifyOptions(void) const
{
    std::ostringstream oss;

    if (verbose) {
        oss << "Verbose mode is on" << std::endl;
    }

    oss << "Device Specs: " << deviceSpecs << std::endl;

    oss << "Device Spec Files: ";
    for (const auto& file : deviceSpecFiles) {
        oss << file << " ";
    }
    oss << std::endl;

    oss << "Sense API Library Path: " << senseApiLibPath << std::endl;
    oss << "Sense API Libraries: ";
    for (const auto& lib : senseApiLibs) {
        oss << lib << " ";
    }
    oss << std::endl;

    return oss.str();
}