#include "directx9_test.h"

// I would like to move opengl and directx into their own classes.
// So I can switch between them and the main file won't be so messy.

// This is my ImGui C++ demo, I mess around with it sometimes.

#ifndef _TEST
#define _TEST
#endif

#ifndef _DIRECTX9
//#define _DIRECTX9
#endif

#ifdef _DIRECTX9
#ifdef _TEST
// Dear ImGui: standalone example application for DirectX 9

// Learn about Dear ImGui:
// - FAQ                  https://dearimgui.com/faq
// - Getting Started      https://dearimgui.com/getting-started
// - Documentation        https://dearimgui.com/docs (same as your local docs/ folder).
// - Introduction, links and more at the top of imgui.cpp

// ImGui
#include "imgui.h"
#include "imgui_impl_dx9.h"

#if _WIN32
#include "imgui_impl_win32.h"
#include <Windows.h>
#include "../util/keystates.h"
#endif
//

#include <d3d9.h>
#include <tchar.h>

#include <string>
#include <iostream>
#include <fstream>

// Util
#include "../util/text_file_functions.h"
#include "../util/text_functions.h"
//
// Menus
#include "../menus/main_menu.h"
#include "../menus/text_menu.h"
//

// https://www.geeksforgeeks.org/macros-and-its-types-in-c-cpp/
// Test macros
#define LIMIT 5

// Test code
#ifndef _TEST
//#define _TEST
#endif

// Data
static LPDIRECT3D9              g_pD3D = nullptr;
static LPDIRECT3DDEVICE9        g_pd3dDevice = nullptr;
static UINT                     g_ResizeWidth = 0, g_ResizeHeight = 0;
static D3DPRESENT_PARAMETERS    g_d3dpp = {};

// Forward declarations of helper functions
bool CreateDeviceD3D(HWND hWnd);
void CleanupDeviceD3D();
void ResetDevice();
LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);

static void HelpMarker(const char* desc)
{
	ImGui::TextDisabled("(?)");
	if (ImGui::BeginItemTooltip())
	{
		ImGui::PushTextWrapPos(ImGui::GetFontSize() * 35.0f);
		ImGui::TextUnformatted(desc);
		ImGui::PopTextWrapPos();
		ImGui::EndTooltip();
	}
}

// Windows specific features
// https://stackoverflow.com/questions/41600981/how-do-i-check-if-a-key-is-pressed-on-c
#ifdef _WIN32
SHORT keyState = GetKeyState(VK_CAPITAL/*(caps lock)*/);
bool isToggled = keyState & 1;
bool isDown = keyState & 0x8000;
//[DllImport("kernel32.dll")]
//static extern IntPtr GetConsoleWindow();
#endif


// Will this work?

//static void setBulletText(const char* text)
//{
//	ImGui::BulletText(text);
//}
//

int test()
{
	int num1 = 5;
	int num2 = 10;

	return num1 + num2;
}

// https://www.geeksforgeeks.org/converting-number-to-string-in-cpp/
// Prints the value of 
std::string testString1()
{
	int num1 = 5;
	int num2 = 10;
	int sum = num1 + num2;
	// Convert the numbers to strings for the return value.
	std::string num1_string = std::to_string(num1);
	std::string num2_string = std::to_string(num2);
	std::string sum_string = std::to_string(sum);

	return "The value of " + num1_string + " + " + num2_string + " = " + sum_string;
}


// imgui_demo line 256
static void ShowWindow(bool* p_open)
{
	static bool show_main_menu = false;

	if (show_main_menu)
	{
		if (ImGui::Begin("Test"))
		{
			ImGui::Text("Hello World!");
		}
	}

	if (!ImGui::Begin("Test", p_open))
	{

		ImGui::End();
		return;
	}


}

// Main code
void DirectX9Test::directX9Test()
{

	// Define custom booleans and features.
	TextMenu *textMenu = new TextMenu();

#ifdef _TEST
	//std::cout << testString1();
#endif

	// Create application window
	//ImGui_ImplWin32_EnableDpiAwareness();
	WNDCLASSEXW wc = { sizeof(wc), CS_CLASSDC, WndProc, 0L, 0L, GetModuleHandle(nullptr), nullptr, nullptr, nullptr, nullptr, L"ImGui Example", nullptr };
	::RegisterClassExW(&wc);
	HWND hwnd = ::CreateWindowW(wc.lpszClassName, L"Dear ImGui DirectX9 Example", WS_OVERLAPPEDWINDOW, 100, 100, 1280, 800, nullptr, nullptr, wc.hInstance, nullptr);

	// Initialize Direct3D
	if (!CreateDeviceD3D(hwnd))
	{
		CleanupDeviceD3D();
		::UnregisterClassW(wc.lpszClassName, wc.hInstance);
		//return 1;
	}

	// Show the window
	::ShowWindow(hwnd, SW_SHOWDEFAULT);
	::UpdateWindow(hwnd);

	// Setup Dear ImGui context
	IMGUI_CHECKVERSION();
	ImGui::CreateContext();
	ImGuiIO& io = ImGui::GetIO(); (void)io;
	io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
	io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;      // Enable Gamepad Controls

	// Setup Dear ImGui style
	ImGui::StyleColorsDark();
	//ImGui::StyleColorsLight();

	// Setup Platform/Renderer backends
	ImGui_ImplWin32_Init(hwnd);
	ImGui_ImplDX9_Init(g_pd3dDevice);

	// Load Fonts
	// - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
	// - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
	// - If the file cannot be loaded, the function will return a nullptr. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
	// - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
	// - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use Freetype for higher quality font rendering.
	// - Read 'docs/FONTS.md' for more instructions and details.
	// - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
	//io.Fonts->AddFontDefault();
	//io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf", 18.0f);
	//io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
	//io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
	//io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
	//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, nullptr, io.Fonts->GetGlyphRangesJapanese());
	//IM_ASSERT(font != nullptr);

	// Our state
	//bool show_demo_window = true;
	bool show_another_window = false;
	ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);

	// Show window
	// Main loop
	bool done = false;
	//bool button1_clicked = false;
	//bool show_app_main_menu_bar = false;
	//static bool toggle_text = false;
	//static bool dark_mode = false;
	//static bool define_test = false;
	//static bool list_values = false;

	while (!done)
	{
		// Poll and handle messages (inputs, window resize, etc.)
		// See the WndProc() function below for our to dispatch events to the Win32 backend.
		MSG msg;
		while (::PeekMessage(&msg, nullptr, 0U, 0U, PM_REMOVE))
		{
			::TranslateMessage(&msg);
			::DispatchMessage(&msg);
			if (msg.message == WM_QUIT)
				done = true;
		}
		if (done)
			break;

		// Handle window resize (we don't resize directly in the WM_SIZE handler)
		if (g_ResizeWidth != 0 && g_ResizeHeight != 0)
		{
			g_d3dpp.BackBufferWidth = g_ResizeWidth;
			g_d3dpp.BackBufferHeight = g_ResizeHeight;
			g_ResizeWidth = g_ResizeHeight = 0;
			ResetDevice();
		}

		// Start the Dear ImGui frame
		ImGui_ImplDX9_NewFrame();
		ImGui_ImplWin32_NewFrame();
		ImGui::NewFrame();

		// 1. Show the big demo window (Most of the sample code is in ImGui::ShowDemoWindow()! You can browse its code to learn more about Dear ImGui!).
		if (show_demo_window)
			ImGui::ShowDemoWindow(&show_demo_window);

		//MainMenu::MainMenuTest();
//#define _OLD_CODE


		if (ImGui::Begin("KCNet ImGui", nullptr, ImGuiWindowFlags_MenuBar))
		{

			MainMenu::MainMenuTest();



			// Text file functions test menu
			if (ImGui::CollapsingHeader("Text File Functions"))
			{
				textMenu->TextMainMenu();
			}
			// End Text file functions test menu

			//if (ImGui::BeginMenu("My menu"))
			//{
			//    //ImGui::BulletText("You should see this");
			//    ImGui::MenuItem("test", NULL);
			//    ImGui::EndMenu();
			//}



	}
		// End ImGui
		ImGui::End();

		// Rendering
		ImGui::EndFrame();
		g_pd3dDevice->SetRenderState(D3DRS_ZENABLE, FALSE);
		g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, FALSE);
		g_pd3dDevice->SetRenderState(D3DRS_SCISSORTESTENABLE, FALSE);
		D3DCOLOR clear_col_dx = D3DCOLOR_RGBA((int)(clear_color.x * clear_color.w * 255.0f), (int)(clear_color.y * clear_color.w * 255.0f), (int)(clear_color.z * clear_color.w * 255.0f), (int)(clear_color.w * 255.0f));
		g_pd3dDevice->Clear(0, nullptr, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, clear_col_dx, 1.0f, 0);
		if (g_pd3dDevice->BeginScene() >= 0)
		{
			ImGui::Render();
			ImGui_ImplDX9_RenderDrawData(ImGui::GetDrawData());
			g_pd3dDevice->EndScene();
		}
		HRESULT result = g_pd3dDevice->Present(nullptr, nullptr, nullptr, nullptr);

		// Handle loss of D3D9 device
		if (result == D3DERR_DEVICELOST && g_pd3dDevice->TestCooperativeLevel() == D3DERR_DEVICENOTRESET)
			ResetDevice();
}

	ImGui_ImplDX9_Shutdown();
	ImGui_ImplWin32_Shutdown();
	ImGui::DestroyContext();

	CleanupDeviceD3D();
	::DestroyWindow(hwnd);
	::UnregisterClassW(wc.lpszClassName, wc.hInstance);
}

// Helper functions

bool CreateDeviceD3D(HWND hWnd)
{
	if ((g_pD3D = Direct3DCreate9(D3D_SDK_VERSION)) == nullptr)
		return false;

	// Create the D3DDevice
	ZeroMemory(&g_d3dpp, sizeof(g_d3dpp));
	g_d3dpp.Windowed = TRUE;
	g_d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
	g_d3dpp.BackBufferFormat = D3DFMT_UNKNOWN; // Need to use an explicit format with alpha if needing per-pixel alpha composition.
	g_d3dpp.EnableAutoDepthStencil = TRUE;
	g_d3dpp.AutoDepthStencilFormat = D3DFMT_D16;
	g_d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_ONE;           // Present with vsync
	//g_d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE;   // Present without vsync, maximum unthrottled framerate
	if (g_pD3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, D3DCREATE_HARDWARE_VERTEXPROCESSING, &g_d3dpp, &g_pd3dDevice) < 0)
		return false;

	return true;
}

void CleanupDeviceD3D()
{
	if (g_pd3dDevice) { g_pd3dDevice->Release(); g_pd3dDevice = nullptr; }
	if (g_pD3D) { g_pD3D->Release(); g_pD3D = nullptr; }
}

void ResetDevice()
{
	ImGui_ImplDX9_InvalidateDeviceObjects();
	HRESULT hr = g_pd3dDevice->Reset(&g_d3dpp);
	if (hr == D3DERR_INVALIDCALL)
		IM_ASSERT(0);
	ImGui_ImplDX9_CreateDeviceObjects();
}

// Forward declare message handler from imgui_impl_win32.cpp
extern IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);

// Win32 message handler
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
	if (ImGui_ImplWin32_WndProcHandler(hWnd, msg, wParam, lParam))
		return true;

	switch (msg)
	{
	case WM_SIZE:
		if (wParam == SIZE_MINIMIZED)
			return 0;
		g_ResizeWidth = (UINT)LOWORD(lParam); // Queue resize
		g_ResizeHeight = (UINT)HIWORD(lParam);
		return 0;
	case WM_SYSCOMMAND:
		if ((wParam & 0xfff0) == SC_KEYMENU) // Disable ALT application menu
			return 0;
		break;
	case WM_DESTROY:
		::PostQuitMessage(0);
		return 0;
	}
	return ::DefWindowProcW(hWnd, msg, wParam, lParam);
}

#endif //_TEST
#endif //_DIRECTX9