Input.h

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// File: Input.h
// Description: The universal input system
// Author(s): Bryley Elder (bryley.elder@digipen.edu) Base Implementation
//            Ori Balashov (ori.balashov@digipen.edu) Refactoring and additions
// 2025 / 09 / 14
// (C) Digipen 2025
//   ____   __                  __  __
// /\__  _\/\ \                /\ \/\ \
// \/_/\ \/\ \ \___      __    \ \ \_\ \    ___   __  __    ____     __
//    \ \ \ \ \  _ `\  /'__`\   \ \  _  \  / __`\/\ \/\ \  /',__\  /'__`\
//     \ \ \ \ \ \ \ \/\  __/    \ \ \ \ \/\ \L\ \ \ \_\ \/\__, `\/\  __/
//      \ \_\ \ \_\ \_\ \____\    \ \_\ \_\ \____/\ \____/\/\____/\ \____\
//       \/_/  \/_/\/_/\/____/     \/_/\/_/\/___/  \/___/  \/___/  \/____/
#pragma once
 
 
#include "System/opengl.h"
#include <unordered_map>
#include "Logging.h"
#include "Utility/Math/Vector4D.h"
 
namespace sys
{
class Editor;
class Input;
}
 
struct KeyPressedMessage;
 
class Controllers
{
 
public:
    Controllers();
    Controllers(int playerNumber); // Will be standard initializer when there are multiple players
    ~Controllers();
 
    auto testController() -> void; // Temporary test function
 
    auto showMenu() -> void;
 
    auto isPressed(const std::string& keyName) -> bool;
 
    auto Update() -> void;
 
private:
    static std::unordered_map<std::string, unsigned int> bind;
 
    static int playerNum;
    static int active;
    static int NUMBER_OF_AXES;
    const unsigned char* hat;
};
 
 
class Keys
{
public:
    friend sys::Input;
    friend sys::Editor;
    Keys();
    
    auto update(float dt) -> void;
 
    auto getInputMap() const -> const std::unordered_map<int, std::string>&;
 
    auto showMenu() -> void;
 
    auto getEnabled() const -> bool;
    auto setEnabled(bool newState) -> void;
    
    // Gets the mouse position in GLFW space (top left is 0,0)
    auto getMousePosition() const -> std::pair<float,float>;
    
    // Gets the mouse position in the world of the gameplay viewport (center is 0,0)
    auto getMouseWorldCoords() const -> const Vector4D&;

    static auto keyCallback(GLFWwindow* window, int pressedKey, int scancode, int action, int mods) -> void;
    
    static auto mouseButtonCallback(GLFWwindow* window, int pressedButton, int action, int mods) -> void;

    static auto sendKeyPressedMessage(unsigned int GLFWKey) -> void;
    
    
 
private:
    std::unordered_map<int, std::string> inputMap;

    bool enabled;
    
    Vector4D mouseWorldCoords = {0.f, 0.f, 0.f, 1.f};
 
    auto setMouseWorldCoords(const Vector4D& coords) -> void;
    auto setImGuiMouseWorldCoords(Vector4D& pos) -> void;
};
 
namespace sys
{
class Input : public System
{
 
public:
    Input()
        : System("Input", Type::Input)
    {
    }
 
    ~Input() override = default;

    static auto getEnum() -> Type
    {
        return Type::Input;
    }
 
    auto clone() const -> std::unique_ptr<GameObject> override;
 
protected:
    auto systemShowMenu() -> void override;
 
public:
    auto onUpdate(float dt) -> void override;
 
    auto endWindow() -> void override
    {
    } // for debug ImGUI
    auto onRender() -> void override;
    auto load(Stream& stream) -> void override;
    auto save(Stream& stream) const -> void override;
 
    auto setEnabled(bool newState) -> void;
    auto getEnabled() const -> bool;

    [[nodiscard]] auto keys() -> Keys&
    {
        return k;
    }

    [[nodiscard]] auto controller() -> Controllers&
    {
        return c;
    }

    auto getMousePosition() const -> std::pair<float,float>;

    auto getWorldMousePosition() const -> const Vector4D&;
 
private:
    Keys k;
    Controllers c;
 
};
}