// Copyright (c) 2026 Storm Dragon
// Authors: Storm Dragon, Angus Kola
// SPDX-License-Identifier: GPL-3.0-or-later

#include "commands_native.h"
#include <X11/extensions/XTest.h>

int cthulhu_ocr_click(unsigned long foreground, int x, int y, int root_width, int root_height) {
    Display *display = XOpenDisplay(NULL);
    if (!display) return 0;
    Window root = DefaultRootWindow(display), query_root, child;
    XWindowAttributes attributes;
    int pointer_x, pointer_y, window_x, window_y;
    unsigned int mask;
    int event_base, error_base, major, minor;
    int ok = XGetWindowAttributes(display, root, &attributes) &&
        attributes.width == root_width && attributes.height == root_height &&
        x >= 0 && x < root_width && y >= 0 && y < root_height &&
        XTestQueryExtension(display, &event_base, &error_base, &major, &minor) &&
        XQueryPointer(display, root, &query_root, &child, &pointer_x, &pointer_y,
                      &window_x, &window_y, &mask) &&
        read_foreground(display).window == foreground;
    int moved = 0;
    if (ok) {
        cthulhu_x11_begin_read(display);
        moved = XTestFakeMotionEvent(display, -1, x, y, CurrentTime);
        ok = moved;
        XSync(display, False);
        if (cthulhu_x11_end_read(display)) ok = 0;
    }
    if (ok && read_foreground(display).window == foreground) {
        cthulhu_x11_begin_read(display);
        int pressed = XTestFakeButtonEvent(display, 1, True, CurrentTime);
        XSync(display, False);
        int released = !pressed || XTestFakeButtonEvent(display, 1, False, CurrentTime);
        XTestFakeMotionEvent(display, -1, pointer_x, pointer_y, CurrentTime);
        XSync(display, False);
        int native_error = cthulhu_x11_end_read(display);
        ok = pressed && released && !native_error;
    } else {
        ok = 0;
        if (moved) {
            cthulhu_x11_begin_read(display);
            XTestFakeMotionEvent(display, -1, pointer_x, pointer_y, CurrentTime);
            cthulhu_x11_end_read(display);
        }
    }
    XCloseDisplay(display);
    return ok;
}