#pragma once

#include "Config.h"
#include "InputConfig.h"
#include "ControllerInfo.h"
#include "InputProvider.h"
#include <atomic>
#include <array>
#include <condition_variable>
#include <thread>
#include <memory>
#include <functional>
#include <string>

class CInputBindingManager
{
public:
	class CBinding;
	class CMotorBinding;
	using ProviderPtr = std::shared_ptr<CInputProvider>;
	using ProviderConnectionMap = std::map<uint32, CInputProvider::OnInputSignalConnection>;
	using BindingPtr = std::shared_ptr<CBinding>;
	using MotorBindingPtr = std::shared_ptr<CMotorBinding>;
	using ProviderMap = std::map<uint32, ProviderPtr>;

	enum
	{
		MAX_PADS = 4,
	};

	enum BINDINGTYPE
	{
		BINDING_UNBOUND = 0,
		BINDING_SIMPLE = 1,
		BINDING_SIMULATEDAXIS = 2,
		BINDING_POVHAT = 3,
		BINDING_MOTOR = 4,
	};

	class CBinding
	{
	public:
		virtual ~CBinding() = default;

		virtual void ProcessEvent(const BINDINGTARGET&, uint32) = 0;

		virtual BINDINGTYPE GetBindingType() const = 0;
		virtual const char* GetBindingTypeName() const = 0;
		virtual uint32 GetValue() const = 0;
		virtual void SetValue(uint32) = 0;
		virtual std::string GetDescription(CInputBindingManager*) const = 0;

		virtual void Save(Framework::CConfig&, const char*) const = 0;
		virtual void Load(Framework::CConfig&, const char*) = 0;
	};

	class CMotorBinding
	{
	public:
		CMotorBinding(const BINDINGTARGET&, const ProviderMap&);
		CMotorBinding(ProviderMap& providers);
		CMotorBinding();
		~CMotorBinding();

		void ProcessEvent(uint8 largeMotor, uint8 smallMotor);

		BINDINGTYPE GetBindingType() const;
		BINDINGTARGET GetBindingTarget() const;

		void Save(Framework::CConfig&, const char*) const;
		void Load(Framework::CConfig&, const char*);

	private:
		void ThreadProc();

		BINDINGTARGET m_binding;
		const CInputBindingManager::ProviderMap& m_providers;

		std::thread m_thread;
		std::condition_variable m_cv;
		std::mutex m_mutex;
		bool m_running = false;
		std::atomic<std::chrono::steady_clock::time_point> m_nextTimeout;
	};

	CInputBindingManager();
	virtual ~CInputBindingManager() = default;

	bool HasBindings() const;

	void RegisterInputProvider(const ProviderPtr&);
	ProviderConnectionMap OverrideInputEventHandler(const InputEventFunction&);

	std::string GetTargetDescription(const BINDINGTARGET&) const;

	uint32 GetBindingValue(uint32, PS2::CControllerInfo::BUTTON) const;
	void ResetBindingValues();

	const CBinding* GetBinding(uint32, PS2::CControllerInfo::BUTTON) const;
	void SetSimpleBinding(uint32, PS2::CControllerInfo::BUTTON, const BINDINGTARGET&);
	void SetPovHatBinding(uint32, PS2::CControllerInfo::BUTTON, const BINDINGTARGET&, uint32);
	void SetSimulatedAxisBinding(uint32, PS2::CControllerInfo::BUTTON, const BINDINGTARGET&, const BINDINGTARGET&);
	void ResetBinding(uint32, PS2::CControllerInfo::BUTTON);

	std::vector<DEVICEINFO> GetDevices() const;
	CMotorBinding* GetMotorBinding(uint32) const;
	void SetMotorBinding(uint32, const BINDINGTARGET&);

	float GetAnalogSensitivity(uint32) const;
	void SetAnalogSensitivity(uint32, float);

	void Reload();
	void Load(std::string);
	void Save();

private:
	class CSimpleBinding : public CBinding
	{
	public:
		CSimpleBinding() = default;
		CSimpleBinding(const BINDINGTARGET&);

		void ProcessEvent(const BINDINGTARGET&, uint32) override;

		BINDINGTYPE GetBindingType() const override;
		const char* GetBindingTypeName() const override;
		std::string GetDescription(CInputBindingManager*) const override;

		uint32 GetValue() const override;
		void SetValue(uint32) override;

		void Save(Framework::CConfig&, const char*) const override;
		void Load(Framework::CConfig&, const char*) override;

	private:
		BINDINGTARGET m_binding;
		uint32 m_value = 0;
	};

	class CPovHatBinding : public CBinding
	{
	public:
		CPovHatBinding() = default;
		CPovHatBinding(const BINDINGTARGET&, uint32 = -1);

		void ProcessEvent(const BINDINGTARGET&, uint32) override;

		BINDINGTYPE GetBindingType() const override;
		const char* GetBindingTypeName() const override;
		std::string GetDescription(CInputBindingManager*) const override;

		uint32 GetValue() const override;
		void SetValue(uint32) override;

		static void RegisterPreferences(Framework::CConfig&, const char*);
		void Save(Framework::CConfig&, const char*) const override;
		void Load(Framework::CConfig&, const char*) override;

	private:
		static int32 GetShortestDistanceBetweenAngles(int32, int32);

		BINDINGTARGET m_binding;
		uint32 m_refValue = 0;
		uint32 m_value = 0;
	};

	class CSimulatedAxisBinding : public CBinding
	{
	public:
		CSimulatedAxisBinding() = default;
		CSimulatedAxisBinding(const BINDINGTARGET&, const BINDINGTARGET&);

		void ProcessEvent(const BINDINGTARGET&, uint32) override;

		BINDINGTYPE GetBindingType() const override;
		const char* GetBindingTypeName() const override;
		std::string GetDescription(CInputBindingManager*) const override;

		uint32 GetValue() const override;
		void SetValue(uint32) override;

		void Save(Framework::CConfig&, const char*) const override;
		void Load(Framework::CConfig&, const char*) override;

	private:
		BINDINGTARGET m_key1Binding;
		BINDINGTARGET m_key2Binding;

		uint32 m_key1State = 0;
		uint32 m_key2State = 0;
	};

	void OnInputEventReceived(const BINDINGTARGET&, uint32);

	static uint32 m_buttonDefaultValue[PS2::CControllerInfo::MAX_BUTTONS];
	static const char* m_padPreferenceName[MAX_PADS];

	//Order of members is quite important here:
	//- m_providersConnection should be last so that it can be destroyed first to avoid
	//  anything from calling into this (some providers run on threads) while dtor is running.
	//- m_motorBindings needs to appear after m_providers. Motor bindings run threads
	//  that can push updates to input providers, so they need to be destroyed before.

	ProviderMap m_providers;

	std::unique_ptr<CInputConfig> m_config;
	std::array<float, MAX_PADS> m_analogSensitivity;
	BindingPtr m_bindings[MAX_PADS][PS2::CControllerInfo::MAX_BUTTONS];
	MotorBindingPtr m_motorBindings[MAX_PADS];

	ProviderConnectionMap m_providersConnection;
};