#include <FL/Fl.H>
#include <cstdio>
#include <cstdlib>
#include <exception>
#include "main_window.hpp"
#include "xtc/xtc_version.h"
#include "xtc/xtc.h"
#include <cstring>

/**
 * @brief Runs the FLTK application and reports command-line or startup failures.
 *
 * @param argc Number of command-line arguments including the program name.
 * @param argv Command-line argument vector.
 * @return EXIT_SUCCESS after the event loop exits, or EXIT_FAILURE for invalid usage or startup failure.
 */
int main(int argc, char **argv)
{
    if (argc == 2 && !std::strcmp(argv[1], "--version")) {
        std::printf("%s %s\n", XTC_PROJECT_NAME, XTC_VERSION_STRING);
        return EXIT_SUCCESS;
    }
    if (argc == 2 && !std::strcmp(argv[1], "--diagnose")) {
        unsigned int features = xtc_build_features();
        std::printf("xtc %s; project formats 1..%u; JACK %s; LADSPA %s\nFor limits and recovery commands run xtc-check --diagnose/--help.\n",
            XTC_VERSION_STRING,XTC_PROJECT_FORMAT_VERSION,features & XTC_FEATURE_JACK ? "compiled" : "disabled",
            features & XTC_FEATURE_LADSPA ? "compiled" : "disabled");
        return EXIT_SUCCESS;
    }
    if (argc == 2 && !std::strcmp(argv[1], "--help")) {
        std::puts(
            "Usage: xtc [PROJECT] or xtc [FLTK options]\n--version, --diagnose and --help work without a display or audio server.");
        return EXIT_SUCCESS;
    }
    const char *project_path = nullptr;
    if (argc == 2 && argv[1][0] != '-') {
        project_path = argv[1];
        argc = 1;
        argv[1] = nullptr;
    }
    try {
        Fl::scheme("flat");
        Fl::background(34, 36, 40);
        Fl::background2(24, 26, 30);
        Fl::foreground(230, 232, 236);
        MainWindow window;
        if (project_path) {
            xtc_result result = window.open_project(project_path);
            if (result != XTC_OK) {
                std::fprintf(stderr, "Cannot open project: %s\n", xtc_result_string(result));
                return EXIT_FAILURE;
            }
        }
        window.show(argc, argv);
        return Fl::run();
    } catch (const std::exception &error) {
        std::fprintf(stderr, "GUI startup/runtime failure: %s\n", error.what());
    } catch (...) {
        std::fputs("Unexpected GUI startup/runtime failure.\n", stderr);
    }
    return EXIT_FAILURE;
}