#pragma once

#include "util/types.hpp"
#include "Emu/Io/PadHandler.h"

#include <QWindow>
#include <QKeyEvent>
#include <string>
#include <vector>
#include <unordered_map>

enum mouse
{
	move_left = 0x05555550,
	move_right = 0x05555551,
	move_up = 0x05555552,
	move_down = 0x05555553,
	wheel_up = 0x05555554,
	wheel_down = 0x05555555,
	wheel_left = 0x05555556,
	wheel_right = 0x05555557
};

// Unique button names for the config files and our pad settings dialog
const std::unordered_map<u32, std::string> mouse_list =
	{
		{Qt::NoButton, ""},
		{Qt::LeftButton, "Mouse Left"},
		{Qt::RightButton, "Mouse Right"},
		{Qt::MiddleButton, "Mouse Middle"},
		{Qt::BackButton, "Mouse Back"},
		{Qt::ForwardButton, "Mouse Fwd"},
		{Qt::TaskButton, "Mouse Task"},
		{Qt::ExtraButton4, "Mouse 4"},
		{Qt::ExtraButton5, "Mouse 5"},
		{Qt::ExtraButton6, "Mouse 6"},
		{Qt::ExtraButton7, "Mouse 7"},
		{Qt::ExtraButton8, "Mouse 8"},
		{Qt::ExtraButton9, "Mouse 9"},
		{Qt::ExtraButton10, "Mouse 10"},
		{Qt::ExtraButton11, "Mouse 11"},
		{Qt::ExtraButton12, "Mouse 12"},
		{Qt::ExtraButton13, "Mouse 13"},
		{Qt::ExtraButton14, "Mouse 14"},
		{Qt::ExtraButton15, "Mouse 15"},
		{Qt::ExtraButton16, "Mouse 16"},
		{Qt::ExtraButton17, "Mouse 17"},
		{Qt::ExtraButton18, "Mouse 18"},
		{Qt::ExtraButton19, "Mouse 19"},
		{Qt::ExtraButton20, "Mouse 20"},
		{Qt::ExtraButton21, "Mouse 21"},
		{Qt::ExtraButton22, "Mouse 22"},
		{Qt::ExtraButton23, "Mouse 23"},
		{Qt::ExtraButton24, "Mouse 24"},

		{mouse::move_left, "Mouse MLeft"},
		{mouse::move_right, "Mouse MRight"},
		{mouse::move_up, "Mouse MUp"},
		{mouse::move_down, "Mouse MDown"},

		{mouse::wheel_up, "Wheel Up"},
		{mouse::wheel_down, "Wheel Down"},
		{mouse::wheel_left, "Wheel Left"},
		{mouse::wheel_right, "Wheel Right"},
};

class keyboard_pad_handler final : public QObject, public PadHandlerBase
{
public:
	bool Init() override;

	keyboard_pad_handler();

	void SetTargetWindow(QWindow* target);
	void processKeyEvent(QKeyEvent* event, bool pressed);
	void keyPressEvent(QKeyEvent* event);
	void keyReleaseEvent(QKeyEvent* event);
	void mousePressEvent(QMouseEvent* event);
	void mouseReleaseEvent(QMouseEvent* event);
	void mouseMoveEvent(QMouseEvent* event);
	void mouseWheelEvent(QWheelEvent* event);

	bool eventFilter(QObject* target, QEvent* ev) override;

	void init_config(cfg_pad* cfg) override;
	std::vector<pad_list_entry> list_devices() override;
	connection get_next_button_press(const std::string& /*padId*/, const pad_callback& /*callback*/, const pad_fail_callback& /*fail_callback*/, gui_call_type /*call_type*/, const std::vector<std::string>& /*buttons*/) override
	{
		return connection::connected;
	}
	bool bindPadToDevice(std::shared_ptr<Pad> pad) override;
	void process() override;

	static std::string GetMouseName(const QMouseEvent* event);
	static std::string GetMouseName(u32 button);
	static QStringList GetKeyNames(const QKeyEvent* keyEvent);
	static std::string GetKeyName(const QKeyEvent* keyEvent, bool with_modifiers);
	static std::string GetKeyName(const u32& keyCode);
	static std::set<u32> GetKeyCodes(const cfg::string& cfg_string);
	static u32 GetKeyCode(const QString& keyName);

	static int native_scan_code_from_string(const std::string& key);
	static std::string native_scan_code_to_string(int native_scan_code);

protected:
	void Key(const u32 code, bool pressed, u16 value = 255);

private:
	QWindow* m_target = nullptr;
	mouse_movement_mode m_mouse_movement_mode = mouse_movement_mode::relative;
	bool m_keys_released = false;
	bool m_mouse_move_used = false;
	bool m_mouse_wheel_used = false;
	bool get_mouse_lock_state() const;
	void release_all_keys();

	std::vector<Pad> m_pads_internal; // Accumulates input until the next poll. Only used for user input!

	// Button Movements
	steady_clock::time_point m_button_time;
	f32 m_analog_lerp_factor = 1.0f;
	f32 m_trigger_lerp_factor = 1.0f;
	bool m_analog_limiter_toggle_mode = false;
	bool m_pressure_intensity_toggle_mode = false;
	u32 m_pressure_intensity_deadzone = 0;

	// Stick Movements
	steady_clock::time_point m_stick_time;
	f32 m_l_stick_lerp_factor = 1.0f;
	f32 m_r_stick_lerp_factor = 1.0f;
	u32 m_l_stick_multiplier = 100;
	u32 m_r_stick_multiplier = 100;

	static constexpr usz max_sticks = 4;
	std::array<u8, max_sticks> m_stick_min{0, 0, 0, 0};
	std::array<u8, max_sticks> m_stick_max{128, 128, 128, 128};
	std::array<u8, max_sticks> m_stick_val{128, 128, 128, 128};

	// Mouse Movements
	steady_clock::time_point m_last_mouse_move_left;
	steady_clock::time_point m_last_mouse_move_right;
	steady_clock::time_point m_last_mouse_move_up;
	steady_clock::time_point m_last_mouse_move_down;
	int m_deadzone_x = 60;
	int m_deadzone_y = 60;
	double m_multi_x = 2;
	double m_multi_y = 2.5;

	// Mousewheel
	steady_clock::time_point m_last_wheel_move_up;
	steady_clock::time_point m_last_wheel_move_down;
	steady_clock::time_point m_last_wheel_move_left;
	steady_clock::time_point m_last_wheel_move_right;
};