#include <glad/glad.h>
#include <GLFW/glfw3.h>

#include <imgui.h>
#include <imgui_impl_glfw.h>
#include <imgui_impl_opengl3.h>
#include <iostream>

int main(int argc, char **argv) {
	std::cout << "Hello working!" << std::endl;


	glfwInit();
	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
	glfwWindowHint(GLFW_RESIZABLE, GLFW_TRUE);
	glfwWindowHint(GLFW_DECORATED, GLFW_FALSE);
	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);


	// make the window
	GLFWwindow *window = glfwCreateWindow(640, 480, "OpenGL Demo", NULL, NULL);
	if (!window) {

		std::cout << "Failed to create GLFW window." << std::endl;
		glfwTerminate();
		return -1;
	}
	glfwMakeContextCurrent(window);
	// d

	// load graphics
	if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
		std::cerr << "Failed to initialize OpenGL loader!" << std::endl;
		return -1;
	}
	glViewport(0, 0, 640, 480);
	// d

	// now make ImGui
	IMGUI_CHECKVERSION();
	ImGui::CreateContext();
	ImGuiIO &io = ImGui::GetIO();
	(void)io;
	io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;
	ImGui::StyleColorsDark();
	ImGui_ImplGlfw_InitForOpenGL(window, true);
	ImGui_ImplOpenGL3_Init("#version 130");
	/// im a dumbass
	///

	// program
	while (!glfwWindowShouldClose(window)) {

		ImGui_ImplOpenGL3_NewFrame();
		ImGui_ImplGlfw_NewFrame();
		ImGui::NewFrame();

		static bool dragging_window = false;
		static double drag_start_global_x, drag_start_global_y;
		static int drag_start_window_x, drag_start_window_y;

		glClearColor(1.0f, .5f, .2f, 1.0f);
		glClear(GL_COLOR_BUFFER_BIT);

		glfwPollEvents();


		if (ImGui::BeginMainMenuBar()) {
			// --- DRAG LOGIC FIRST ---
			bool is_hovered = ImGui::IsWindowHovered();
			bool is_clicked = ImGui::IsMouseClicked(0);
			bool is_held = ImGui::IsMouseDown(0);

			// Get current window position
			int window_x, window_y;
			glfwGetWindowPos(window, &window_x, &window_y);

			// Get current mouse position relative to window
			double local_mouse_x, local_mouse_y;
			glfwGetCursorPos(window, &local_mouse_x, &local_mouse_y);

			// Convert to global mouse position
			double global_mouse_x = window_x + local_mouse_x;
			double global_mouse_y = window_y + local_mouse_y;

			// ✅ Only start dragging if not over any ImGui menu item
			if (is_hovered && is_clicked && !ImGui::IsAnyItemHovered()) {
				dragging_window = true;
				drag_start_global_x = global_mouse_x;
				drag_start_global_y = global_mouse_y;
				drag_start_window_x = window_x;
				drag_start_window_y = window_y;
			}


			static bool is_maximized = false;
			static int restore_x, restore_y, restore_w, restore_h;




			if (dragging_window) {
				if (is_held) {
					double dx = global_mouse_x - drag_start_global_x;
					double dy = global_mouse_y - drag_start_global_y;

					int new_x = drag_start_window_x + static_cast<int>(dx);
					int new_y = drag_start_window_y + static_cast<int>(dy);

					glfwSetWindowPos(window, new_x, new_y);


					GLFWmonitor* primaryMonitor = glfwGetPrimaryMonitor();
					int monitor_x, monitor_y, monitor_w, monitor_h;
					if (glfwGetMonitorWorkarea) {
						glfwGetMonitorWorkarea(primaryMonitor, &monitor_x, &monitor_y, &monitor_w, &monitor_h);
					}


					const int tolerance = 2;
					if (!is_maximized && abs(new_y - monitor_y) <= tolerance) {

						glfwGetWindowPos(window, &restore_x, &restore_y);
						glfwGetWindowSize(window, &restore_w, &restore_h);


						glfwSetWindowPos(window, monitor_x, monitor_y);
						glfwSetWindowSize(window, monitor_w, monitor_h);
						is_maximized = true;
						dragging_window = false;
					}
				} else {
					dragging_window = false;
				}

				if (!dragging_window && is_maximized) {
					double mx, my;
					glfwGetCursorPos(window, &mx, &my);
					if (ImGui::IsMouseDown(0) && my < 10.0) {
						// Start unmaximize drag
						is_maximized = false;
						glfwSetWindowSize(window, restore_w, restore_h);
						glfwSetWindowPos(window,
										 static_cast<int>(global_mouse_x - restore_w / 2),
										 static_cast<int>(global_mouse_y - 10));
						dragging_window = true;
						drag_start_global_x = global_mouse_x;
						drag_start_global_y = global_mouse_y;
						drag_start_window_x = static_cast<int>(global_mouse_x - restore_w / 2);
						drag_start_window_y = static_cast<int>(global_mouse_y - 10);
					}
				}

			}


			// --- MENU ITEMS ALWAYS RENDERED ---
			if (ImGui::BeginMenu("File")) {
				if (ImGui::MenuItem("Quit")) {
					glfwSetWindowShouldClose(window, true);
				}
				ImGui::EndMenu();
			}

			float window_widthA = ImGui::GetWindowWidth();
			ImVec2 size = ImGui::CalcTextSize("x");
			float button_width = size.x + ImGui::GetStyle().FramePadding.x * 2;
			ImGui::SameLine(window_widthA - button_width - ImGui::GetStyle().ItemSpacing.x);

			if (ImGui::Button("x")) {

				std::cout << "Exiting..." << std::endl;
				glfwSetWindowShouldClose(window, true);
			}
			ImGui::EndMainMenuBar();


		}


		GLFWmonitor* primaryMonitor = glfwGetPrimaryMonitor();
		int monitor_x, monitor_y, monitor_width, monitor_height;


		if (glfwGetMonitorWorkarea) {
			glfwGetMonitorWorkarea(primaryMonitor, &monitor_x, &monitor_y, &monitor_width, &monitor_height);
		} else {
			// Fallback
			const GLFWvidmode* mode = glfwGetVideoMode(primaryMonitor);
			glfwGetMonitorPos(primaryMonitor, &monitor_x, &monitor_y);
			monitor_width = mode->width;
			monitor_height = mode->height;
		}


		int win_x, win_y;
		glfwGetWindowPos(window, &win_x, &win_y);


		const int tolerance = 5;
		if (abs(win_y - monitor_y) <= tolerance) {
			std::cout << "Window is at the top of the main screen!" << std::endl;
		}





		ImGui::Begin("Editor");
		ImGui::Text("Hello from editor");
		ImGui::End();

		ImGui::Render();
		ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
		glfwSwapBuffers(window);
	}

	glfwDestroyWindow(window);
	glfwTerminate();

	return 0;
}