#pragma once

#include <SDL3/SDL.h>
#include <glm/glm.hpp>

// Simple polling-based input state. Call begin_frame() once per frame,
// then query state during update.

class Input {
public:
    // Call once per frame BEFORE reading any input state.
    // Processes the SDL event queue and updates internal state.
    void begin_frame();

    // Keyboard

    bool key_down(SDL_Keycode key) const;
    bool key_pressed(SDL_Keycode key) const;   // true only on the frame it went down
    bool key_released(SDL_Keycode key) const;  // true only on the frame it went up

    // Mouse

    glm::vec2 mouse_pos() const;         // in window coordinates
    glm::vec2 mouse_delta() const;       // movement since last frame
    float scroll_delta() const;          // vertical scroll (positive = scroll up)

    bool mouse_down(int button) const;   // SDL_BUTTON_LEFT, MIDDLE, RIGHT
    bool mouse_pressed(int button) const;
    bool mouse_released(int button) const;

    // Window

    bool quit_requested() const { return quit_; }

private:
    // Keyboard
    bool key_state_[SDL_SCANCODE_COUNT] = {};
    bool key_prev_[SDL_SCANCODE_COUNT] = {};
    bool key_just_pressed_[SDL_SCANCODE_COUNT] = {};
    bool key_just_released_[SDL_SCANCODE_COUNT] = {};

    // Mouse
    glm::vec2 mouse_pos_   = {0.0f, 0.0f};
    glm::vec2 mouse_prev_  = {0.0f, 0.0f};
    glm::vec2 mouse_delta_ = {0.0f, 0.0f};
    float scroll_          = 0.0f;
    bool  mouse_state_[8]       = {};
    bool  mouse_prev_state_[8]  = {};
    bool  mouse_pressed_[8]     = {};
    bool  mouse_released_[8]    = {};

    bool quit_ = false;
};