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#ifndef PKE_PLAYER_INPUT_HPP
#define PKE_PLAYER_INPUT_HPP

#include "game-type-defs.hpp"
#include "vendor/pk.h"

#include <cstdint>

TypeSafeInt_H(InputActionSetHandle, uint8_t, 0xFF);

TypeSafeInt_constexpr(InputEventHash, uint16_t, 0xFFFF);

const InputEventHash PKE_INPUT_HASH_EVENT_TYPE_CURSOR_ENTER = InputEventHash    {0x0001};
const InputEventHash PKE_INPUT_HASH_EVENT_TYPE_CURSOR_POS = InputEventHash      {0x0002};
const InputEventHash PKE_INPUT_HASH_EVENT_TYPE_KEY = InputEventHash             {0x0004};
const InputEventHash PKE_INPUT_HASH_EVENT_TYPE_MOUSE_BUTTON = InputEventHash    {0x0008};
const InputEventHash PKE_INPUT_HASH_EVENT_TYPE_SCROLL = InputEventHash          {0x0010};
const InputEventHash PKE_INPUT_HASH_EVENT_TYPE_WINDOW_FOCUS = InputEventHash    {0x0020};
const InputEventHash PKE_INPUT_HASH_CURSOR_ENTERED_FALSE = InputEventHash       {0x0040};
const InputEventHash PKE_INPUT_HASH_CURSOR_ENTERED_TRUE = InputEventHash        {0x0080};
const InputEventHash PKE_INPUT_HASH_KEYBOARD_KEY_ACTION_RELEASE = InputEventHash{0x0100};
const InputEventHash PKE_INPUT_HASH_KEYBOARD_KEY_ACTION_PRESS = InputEventHash  {0x0200};
const InputEventHash PKE_INPUT_HASH_KEYBOARD_KEY_ACTION_REPEAT = InputEventHash {0x0400};
const InputEventHash PKE_INPUT_HASH_MOUSE_BUTTON_ACTION_RELEASE = InputEventHash{0x0800};
const InputEventHash PKE_INPUT_HASH_MOUSE_BUTTON_ACTION_PRESS = InputEventHash  {0x1000};
const InputEventHash PKE_INPUT_HASH_WINDOW_FOCUSED_FALSE = InputEventHash       {0x2000};
const InputEventHash PKE_INPUT_HASH_WINDOW_FOCUSED_TRUE = InputEventHash        {0x4000};

const InputEventHash PKE_INPUT_HASH_ALL_EVENTS =
	PKE_INPUT_HASH_EVENT_TYPE_CURSOR_ENTER
	| PKE_INPUT_HASH_EVENT_TYPE_CURSOR_POS
	| PKE_INPUT_HASH_EVENT_TYPE_KEY
	| PKE_INPUT_HASH_EVENT_TYPE_MOUSE_BUTTON
	| PKE_INPUT_HASH_EVENT_TYPE_SCROLL
	| PKE_INPUT_HASH_EVENT_TYPE_WINDOW_FOCUS;
const InputEventHash PKE_INPUT_HASH_ALL_CURSOR_ENTER_EVENTS =
	PKE_INPUT_HASH_EVENT_TYPE_CURSOR_ENTER
	| PKE_INPUT_HASH_CURSOR_ENTERED_FALSE
	| PKE_INPUT_HASH_CURSOR_ENTERED_TRUE;
const InputEventHash PKE_INPUT_HASH_ALL_CURSOR_POS_EVENTS =
	PKE_INPUT_HASH_EVENT_TYPE_CURSOR_POS;
const InputEventHash PKE_INPUT_HASH_ALL_KEY_EVENTS =
	PKE_INPUT_HASH_EVENT_TYPE_KEY
	| PKE_INPUT_HASH_KEYBOARD_KEY_ACTION_RELEASE
	| PKE_INPUT_HASH_KEYBOARD_KEY_ACTION_PRESS
	| PKE_INPUT_HASH_KEYBOARD_KEY_ACTION_REPEAT;
const InputEventHash PKE_INPUT_HASH_ALL_MOUSE_BUTTON_EVENTS =
	PKE_INPUT_HASH_EVENT_TYPE_MOUSE_BUTTON
	| PKE_INPUT_HASH_MOUSE_BUTTON_ACTION_RELEASE
	| PKE_INPUT_HASH_MOUSE_BUTTON_ACTION_PRESS;
const InputEventHash PKE_INPUT_HASH_ALL_SCROLL_EVENTS =
	PKE_INPUT_HASH_EVENT_TYPE_SCROLL;
const InputEventHash PKE_INPUT_HASH_ALL_WINDOW_FOCUS_EVENTS =
	PKE_INPUT_HASH_EVENT_TYPE_WINDOW_FOCUS
	| PKE_INPUT_HASH_WINDOW_FOCUSED_FALSE
	| PKE_INPUT_HASH_WINDOW_FOCUSED_FALSE;

struct PkeInputEventBase { };
struct PkeInputEventHolder {
	InputEventHash type = InputEventHash{0};
	PkeInputEventBase *ptr = nullptr;
};
struct PkeCursorEnterEvent : public PkeInputEventBase {
	InputActionSetHandle sourceSet;
	bool isEntered;
};
struct PkeCursorPosEvent : public PkeInputEventBase {
	InputActionSetHandle sourceSet;
	double xMotion;
	double yMotion;
};
struct PkeKeyEvent : public PkeInputEventBase {
	InputActionSetHandle sourceSet;
	bool isPressed;
	bool thisTick;
	int32_t button;
	int32_t mods;
};
struct PkeMouseButtonEvent : public PkeInputEventBase {
	InputActionSetHandle sourceSet;
	bool isPressed;
	bool thisTick;
	int32_t button;
	int32_t mods;
};
struct PkeScrollEvent : public PkeInputEventBase {
	InputActionSetHandle sourceSet;
	double xMotion;
	double yMotion;
};
struct PkeWindowFocusEvent : public PkeInputEventBase {
	InputActionSetHandle sourceSet;
	bool isFocused;
};

struct PkeInputEventMask {
	InputEventHash computedHash = InputEventHash{0};
	int32_t button = -1;
	int32_t mods = 0;
};

constexpr uint64_t PKE_INPUT_ACTION_MASK_COUNT = 1;
struct PkeInputAction {
	const char *name;
	union {
		PkeInputEventMask masks[PKE_INPUT_ACTION_MASK_COUNT] = {{}};
		struct {
			PkeInputEventMask primaryHash;
		};
	};
	int32_t eventIndex;
};
struct PkeInputSet {
	const char *title;
	uint64_t actionCount;
	PkeInputAction *actions;
};

void PkeInput_Tick(double delta);
PkeInputEventHolder PkeInput_Query(const char *actionName);
void PkeInput_Init();
InputActionSetHandle PkeInput_RegisterSet(const PkeInputSet &set);
void PkeInput_ActivateSet(InputActionSetHandle handle);
void PkeInput_DeactivateSet(InputActionSetHandle handle);
void PkeInput_UnregisterSet(InputActionSetHandle handle);
void PkeInput_Teardown();

#endif /* PKE_PLAYER_INPUT_HPP */