/**
 * Copyright (c) 2025 Dominic Masters
 * 
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */

#pragma once
#include "inputbutton.h"
#include "inputaction.h"
#include "event/event.h"

#if DOLPHIN
  #define INPUT_PAD_COUNT PAD_CHANMAX
  #define INPUT_AXIS_FLOAT(value) ((float_t)(value) / 128.0f)
#endif

#define INPUT_LISTENER_PRESSED_MAX 16
#define INPUT_LISTENER_RELEASED_MAX INPUT_LISTENER_PRESSED_MAX

typedef struct {
  const inputaction_t action;
} inputevent_t;

typedef struct {
  inputactiondata_t actions[INPUT_ACTION_COUNT];

  eventlistener_t pressedListeners[INPUT_LISTENER_PRESSED_MAX];
  event_t eventPressed;
  eventlistener_t releasedListeners[INPUT_LISTENER_RELEASED_MAX];
  event_t eventReleased;

  #if INPUT_GAMEPAD == 1
    float_t deadzone;
  #endif

  #if INPUT_SDL2 == 1
    #if INPUT_GAMEPAD == 1
      SDL_GameController *controller;
    #endif
    
    #if INPUT_KEYBOARD == 1
      const uint8_t *keyboardState;
    #endif

  #elif DOLPHIN
    int padState[INPUT_PAD_COUNT];
    float_t pads[INPUT_PAD_COUNT][INPUT_GAMEPAD_AXIS_COUNT];
  
  #endif
} input_t;

extern input_t INPUT;

/**
 * Initialize the input system.
 */
void inputInit(void);

/**
 * Updates the input state.
 */
void inputUpdate(void);

/**
 * Gets the current value of a specific input action.
 * 
 * @param action The input action to get the value for.
 * @return The current value of the action (0.0f to 1.0f).
 */
float_t inputGetCurrentValue(const inputaction_t action);

/**
 * Gets the last value of a specific input action.
 * 
 * @param action The input action to get the value for.
 * @return The last value of the action (0.0f to 1.0f).
 */
float_t inputGetLastValue(const inputaction_t action);

#if TIME_FIXED == 0
  /**
   * Gets the current value of a specific input action (dynamic timestep).
   * 
   * @param action The input action to get the value for.
   * @return The current value of the action (0.0f to 1.0f).
   */
  float_t inputGetCurrentValueDynamic(const inputaction_t action);

  /**
   * Gets the last value of a specific input action (dynamic timestep).
   * 
   * @param action The input action to get the value for.
   * @return The last value of the action (0.0f to 1.0f).
   */
  float_t inputGetLastValueDynamic(const inputaction_t action);
#endif

/**
 * Checks if a specific input action is currently pressed.
 * 
 * @param action The input action to check.
 * @return true if the action is currently pressed, false otherwise.
 */
bool_t inputIsDown(const inputaction_t action);

/**
 * Checks if a specific input action was pressed in the last update.
 * 
 * @param action The input action to check.
 * @return true if the action was pressed in the last update, false otherwise.
 */
bool_t inputWasDown(const inputaction_t action);

/**
 * Checks if a specific input action was down this frame but not in the the
 * previous frame.
 * 
 * @param action The input action to check.
 * @return true if the action is currently pressed, false otherwise.
 */
bool_t inputPressed(const inputaction_t action);

/**
 * Checks if a specific input action was released this frame.
 * 
 * @param action The input action to check.
 * @return true if the action was released this frame, false otherwise.
 */
bool_t inputReleased(const inputaction_t action);

/**
 * Gets the value of an input axis, defined by two actions (negative and
 * positive).
 * 
 * @param neg The action representing the negative direction of the axis.
 * @param pos The action representing the positive direction of the axis.
 * @return The current value of the axis (-1.0f to 1.0f).
 */
float_t inputAxis(const inputaction_t neg, const inputaction_t pos);

/**
 * Binds an input button to an action.
 * 
 * @param button The input button to bind.
 * @param action The input action to bind the button to.
 */
void inputBind(const inputbutton_t button, const inputaction_t act);