#ifndef __HGSANEIMPL_HPP__
#define __HGSANEIMPL_HPP__

#include "HGSane.h"
#include "../base/HGInc.h"
#include "../base/HGDll.h"
#include "../base/HGThread.h"
#include "../base/HGLock.h"
#include "sane/sane_ex.h"
#include "saneui/HGSaneUI.h"
#include <list>
#include <vector>
#include <string>

typedef SANE_Status (*f_sane_init)(SANE_Int* version_code, SANE_Auth_Callback authorize);
typedef void (*f_sane_exit)(void);
typedef SANE_Status (*f_sane_get_devices)(const SANE_Device*** device_list, SANE_Bool local_only);
typedef SANE_Status (*f_sane_open)(SANE_String_Const devicename, SANE_Handle* handle);
typedef void (*f_sane_close)(SANE_Handle handle);
typedef SANE_Status (*f_sane_start)(SANE_Handle handle);
typedef SANE_Status (*f_sane_read)(SANE_Handle handle, SANE_Byte* data, SANE_Int max_length, SANE_Int* length);
typedef void (*f_sane_cancel)(SANE_Handle handle);
typedef SANE_Status (*f_sane_set_io_mode)(SANE_Handle handle, SANE_Bool non_blocking);
typedef SANE_String_Const (*f_sane_strstatus)(SANE_Status status);
typedef SANE_Status (*f_sane_get_parameters)(SANE_Handle handle, SANE_Parameters* params);
typedef const SANE_Option_Descriptor* (*f_sane_get_option_descriptor)(SANE_Handle handle, SANE_Int option);
typedef SANE_Status (*f_sane_control_option)(SANE_Handle handle, SANE_Int option, SANE_Action action, void* value, SANE_Int* info);
// 非标准接口
typedef SANE_Status (*f_sane_io_control)(SANE_Handle h, unsigned long code, void* data, unsigned* len);

class HGSaneManagerImpl
{
	friend class HGSaneDeviceImpl;
public:
	HGSaneManagerImpl();
	~HGSaneManagerImpl();

	HGResult Create(const HGChar* sanePath);
	HGResult Destroy();
	HGResult GetDeviceCount(HGUInt *count);
	HGResult GetDeviceName(HGUInt index, HGChar* name, HGUInt maxLen);
	HGResult OpenDevice(HGUInt index, class HGSaneDeviceImpl **deviceImpl, HGChar* errInfo, HGUInt errInfoLen);
	HGResult OpenSelectedDevice(HGWindow parent, class HGSaneDeviceImpl** deviceImpl);

private:
	HGResult FindFunctions();
	void RemoveDevice(class HGSaneDeviceImpl* deviceImpl);

private:
	HGDll m_dll;
	f_sane_init m_f_sane_init;
	f_sane_exit m_f_sane_exit;
	f_sane_get_devices m_f_sane_get_devices;
	f_sane_open m_f_sane_open;
	f_sane_close m_f_sane_close;
	f_sane_start m_f_sane_start;
	f_sane_read m_f_sane_read;
	f_sane_cancel m_f_sane_cancel;
	f_sane_set_io_mode m_f_sane_set_io_mode;
	f_sane_strstatus m_f_sane_strstatus;
	f_sane_get_parameters m_f_sane_get_parameters;
	f_sane_get_option_descriptor m_f_sane_get_option_descriptor;
	f_sane_control_option m_f_sane_control_option;
    f_sane_io_control m_f_sane_io_control;
	SANEAPI m_saneApi;

	std::list<class HGSaneDeviceImpl*> m_listDeviceImpl;
};

class HGSaneDeviceImpl
{
public:
	HGSaneDeviceImpl(HGSaneManagerImpl* mgrImpl);
	~HGSaneDeviceImpl();

	HGResult Init(const HGChar* devName, SANE_Handle handle);
	HGResult Open(const HGChar *devName, HGChar* errInfo, HGUInt errInfoLen);
	HGResult Close();
	HGResult GetName(HGChar* name, HGUInt maxLen);
	HGResult ShowSettingDlg(HGWindow parent);
	HGResult Start(HGSane_DeviceEventFunc eventFunc, HGPointer eventParam,
		HGSane_DeviceImageFunc imageFunc, HGPointer imageParam, HGChar* errInfo, HGUInt errInfoLen);
	HGResult Stop();
	HGResult StartWithUI(HGWindow parent, HGSane_DeviceImageFunc imageFunc, HGPointer imageParam);

private:
	HGUInt GetDpi();
	static void HGAPI ThreadFunc(HGThread thread, HGPointer param);
	static void ShowScanImageCallback(const SANE_Parameters* imageFormat, const SANE_Byte* imageData, void* callbackParam);

private:
	HGSaneManagerImpl* m_mgrImpl;
	std::string m_devName;
	SANE_Handle m_devHandle;
	HGByte* m_buffer;
	HGInt m_bufferSize;
	HGUInt m_dpi;
	HGSane_DeviceEventFunc m_eventFunc;
	HGPointer m_eventParam;
	HGSane_DeviceImageFunc m_imageFunc;
	HGPointer m_imageParam;
	volatile HGBool m_stopThread;
	HGThread m_thread;
};

#endif /* __HGSANEIMPL_HPP__ */