function sane()
{

}

sane.socket = null;
sane.printlog = false;

sane.onInit = null;
sane.onGetDevices = null;
sane.onScanOneFileDone = null;
sane.onErrorMessage = null;

sane.showbase64 = 0;
sane.source = "Adf-duplex";
sane.mode = "Color";
sane.resolution = 200;

sane.init = function(port, printlog)
{
	if (sane.socket != null)
	{
		return;
	}

	sane.socket = new WebSocket("ws://127.0.0.1:" + port.toString());
	sane.printlog = printlog;
	
	sane.socket.onopen = function(msg)
	{
		sane.socket.send(JSON.stringify({
			'func':'is_device_init'
		}));
		
		sane.socket.onmessage = function(msg)
		{
			if (sane.printlog)
				console.log(msg.data);
			
			var message = JSON.parse(msg.data);			
			if ("is_device_init" == message['func'])
			{				
				if (message['ret'] != 0)
				{
					sane.socket.send(JSON.stringify({
						'func':'init_device'
					}));
				}
				else
				{
					if (typeof sane.onInit === 'function')
					{
						sane.onInit();
					}
				}
			}
			else if ("init_device" == message['func'])
			{
				if (0 == message['ret'])
				{
					if (typeof sane.onInit === 'function')
					{
						sane.onInit();
					}
				}
				else
				{
					if (typeof sane.onErrorMessage === 'function')
					{
						sane.onErrorMessage(message['err_info']);	
					}
				}
			}
		}
	}
	
	sane.socket.onclose = function(msg)
	{ 
		//alert('socket.onclose');
	}
	
	sane.socket.onerror = function(msg)
	{
		//alert('socket.onerror');
	}
}

sane.deinit = function()
{
	if (sane.socket === null)
	{
		return;
	}
	
	sane.socket.close();
	sane.socket = null;
}


sane.registerevent = function(eventName, callback)
{
	if ("OnInit" == eventName)
	{
		sane.onInit = callback;
	}
	else if ("OnGetDevices" == eventName)
	{
		sane.onGetDevices = callback;
	}
	else if ("OnScanOneFileDone" == eventName)
	{
		sane.onScanOneFileDone = callback;
	}
	else if ("OnErrorMessage" == eventName)
	{
		sane.onErrorMessage = callback;
	}
}

sane.getdevices = function()
{
	if (sane.socket === null)
	{
		return;
	}

	sane.socket.send(JSON.stringify({
		'func':'get_device_name_list'
	}));
	
	sane.socket.onmessage = function(msg)
	{
		if (sane.printlog)
			console.log(msg.data);
		
		var message = JSON.parse(msg.data);		
		if ("get_device_name_list" == message['func'])
		{
			if (0 == message['ret'])
			{
				if (typeof sane.onGetDevices === 'function')
				{
					sane.onGetDevices(message['device_name_list']);
				}
			}
			else
			{
				if (typeof sane.onErrorMessage === 'function')
				{
					sane.onErrorMessage(message['err_info']);	
				}
			}
		}
	}
}

sane.clear = function()
{
	if (sane.socket === null)
	{
		return;
	}
	
	sane.socket.send(JSON.stringify({
		'func':'clear_global_file_save_path'
	}));
	
	sane.socket.onmessage = function(msg)
	{
		if (sane.printlog)
			console.log(msg.data);
		
		var message = JSON.parse(msg.data);		
		if ("clear_global_file_save_path" == message['func'])
		{
			if (0 != message['ret'])
			{
				if (typeof sane.onErrorMessage === 'function')
				{
					sane.onErrorMessage(message['err_info']);	
				}	
			}
		}
	}
}

sane.scan = function(devname)
{
	if (sane.socket === null)
	{
		return;
	}
	
	if (devname === "" || typeof devname === 'undefined')
	{
		return;
	}

	sane.socket.send(JSON.stringify({
		'func':'get_curr_device_name'
	}));
	
	sane.socket.onmessage = function(msg)
	{
		if (sane.printlog)
			console.log(msg.data);
		
		var message = JSON.parse(msg.data);		
		if ("get_curr_device_name" == message['func'])
		{
			if (0 != message['ret'])
			{
				var openDeviceJsonData = {};
				openDeviceJsonData.func = 'open_device';
				openDeviceJsonData.device_name = devname;
				
				//alert(JSON.stringify(openDeviceJsonData));
				sane.socket.send(JSON.stringify(openDeviceJsonData));
			}
			else
			{
				if (message['device_name'] != devname)
				{
					sane.socket.send(JSON.stringify({
						'func':'close_device'
					}));
				}
				else
				{
					sane.socket.send(JSON.stringify({
						'func':'is_device_scanning'
					}));
				}
			}
		}
		else if ("close_device" == message['func'])
		{
			if (0 == message['ret'])
			{
				var openDeviceJsonData = {};
				openDeviceJsonData.func = 'open_device';
				openDeviceJsonData.device_name = devname;
				
				//alert(JSON.stringify(openDeviceJsonData));
				sane.socket.send(JSON.stringify(openDeviceJsonData));
			}
			else
			{
				if (typeof sane.onErrorMessage === 'function')
				{
					sane.onErrorMessage(message['err_info']);	
				}		
			}
		}
		else if ("open_device" == message['func'])
		{
			if (0 == message['ret'])
			{
				sane.socket.send(JSON.stringify({
					'func':'is_device_scanning'
				}));
			}
			else
			{
				if (typeof sane.onErrorMessage === 'function')
				{
					sane.onErrorMessage(message['err_info']);	
				}		
			}
		}
		else if ("is_device_scanning" == message['func'])
		{
			if (0 != message['ret'])
			{				
				var setDeviceParamJsonData = {};
				setDeviceParamJsonData.func = 'set_device_param';
				setDeviceParamJsonData.device_param = [];
				
				var ele1 = {};
				ele1.name = '颜色模式';
				ele1.value = '24位彩色';
				if (sane.mode == 'Gray')
					ele1.value = '256级灰度';
				else if (sane.mode == 'Lineart')
					ele1.value = '黑白';
				setDeviceParamJsonData.device_param.push(ele1);
				
				var ele2 = {};
				ele2.name = '扫描页面';
				ele2.value = '双面';
				if (sane.source == 'Adf-front')
					ele2.value = '单面';
				setDeviceParamJsonData.device_param.push(ele2);
				
				var ele3 = {};
				ele3.name = '分辨率';
				ele3.value = sane.resolution;
				setDeviceParamJsonData.device_param.push(ele3);
				
				//alert(JSON.stringify(setDeviceParamJsonData));
				sane.socket.send(JSON.stringify(setDeviceParamJsonData));
			}
			else
			{
				if (typeof sane.onErrorMessage === 'function')
				{
					sane.onErrorMessage('设备正在扫描中...');	
				}	
			}
		}
		else if ("set_device_param" == message['func'])
		{
			if (0 == message['ret'])
			{
				var startScanJsonData = {};
				startScanJsonData.func = 'start_scan';
				startScanJsonData.get_base64 = false;
				if (sane.showbase64)
					startScanJsonData.get_base64 = true;
				
				//alert(JSON.stringify(startScanJsonData));
				sane.socket.send(JSON.stringify(startScanJsonData));
			}
			else
			{
				if (typeof sane.onErrorMessage === 'function')
				{
					sane.onErrorMessage(message['err_info']);	
				}
			}
		}
		else if ("start_scan" == message['func'])
		{
			if (0 != message['ret'])
			{
				if (typeof sane.onErrorMessage === 'function')
				{
					sane.onErrorMessage(message['err_info']);	
				}
			}
		}
		else if ("scan_begin" == message['func'])
		{
			//
		}
		else if ("scan_end" == message['func'])
		{
			//
		}
		else if ("scan_info" == message['func'])
		{
			if (message['is_error'] && typeof sane.onErrorMessage === 'function')
			{
				sane.onErrorMessage(message['info']);	
			}
		}
		else if ("scan_image" == message['func'])
		{
			if (typeof sane.onScanOneFileDone === 'function')
			{
				sane.onScanOneFileDone("string", "jpg", message['image_path'], message['image_base64']);
			}
		}
	}
}