/* DESKTOP - desktop environment / window manager / compositor module for modfetch
 *
 * author: jacekpoz
 * 09 Feb 2024
 */

#include <mod.h>

#include <stdio.h>
#include <stdlib.h>
#ifdef MF_DESKTOP_X11
#include <X11/Xlib.h>
#endif

static const semver _version = {
    .major = 0,
    .minor = 1,
    .patch = 0,
};

semver version(void) { return _version; }
const char *name(void) { return "desktop"; }

uint8_t init(semver api_ver, char **config) {
    if (!sveq(api_ver, API_VERSION)) {
        return MFERR_APIVER;
    }

    (void)config;

    return 0;
}

const char *get(void) {
    char *ret;

    char *current_desktop = getenv("XDG_CURRENT_DESKTOP");

    if (current_desktop == NULL) {
#ifdef MF_DESKTOP_X11
        Display *disp = XOpenDisplay(NULL);
        Window root = XDefaultRootWindow(disp);
        Atom atom = XInternAtom(disp, "_NET_WM_NAME", 0);
        Atom type;
        int fmt;
        unsigned long num_items;
        unsigned long bytes_after;
        unsigned char *prop;
        XGetWindowProperty(disp, root, atom, 0, 4096 / sizeof(int32_t), 0, AnyPropertyType,
                           &type, &fmt, &num_items, &bytes_after, &prop);
        current_desktop = prop;
#else
        current_desktop = "Unknown";
#endif
    }

    if (asprintf(&ret, "Desktop: %s", current_desktop) < 0) {
        fprintf(stderr, "error: failed formatting (this shouldn't happen)");
        exit(EXIT_FAILURE);
    }

    return ret;
}