function hgwebsdk()
{
	
}

hgwebsdk.socket = null;

hgwebsdk.scan = function(host, port, path)
{
	if (hgwebsdk.socket != null)
	{
		return;
	}
	
	hgwebsdk.socket = new WebSocket("ws://127.0.0.1:38999");

	hgwebsdk.socket.onopen = function(msg)
	{
		hgwebsdk.socket.send(JSON.stringify({
			'func':'is_device_init'
		}));
		
		hgwebsdk.socket.onmessage = function(msg)
		{
			console.log(msg.data);
			
			var message = JSON.parse(msg.data);			
			if ("is_device_init" == message['func'])
			{				
				if (message['ret'] != 0)
				{
					hgwebsdk.socket.send(JSON.stringify({
						'func':'init_device'
					}));
				}
				else
				{
					hgwebsdk.socket.send(JSON.stringify({
						'func':'get_curr_device_name'
					}));
				}
			}
			else if ("init_device" == message['func'])
			{
				if (0 == message['ret'])
				{
					hgwebsdk.socket.send(JSON.stringify({
						'func':'get_curr_device_name'
					}));
				}
				else
				{
					hgwebsdk.socket.close();
				}
			}
			else if ("get_curr_device_name" == message['func'])
			{
				if (0 != message['ret'])
				{
					hgwebsdk.socket.send(JSON.stringify({
						'func':'open_device'
					}));
				}
				else
				{
					hgwebsdk.socket.send(JSON.stringify({
						'func':'is_device_scanning'
					}));
				}
			}
			else if ("open_device" == message['func'])
			{
				if (0 == message['ret'])
				{
					hgwebsdk.socket.send(JSON.stringify({
						'func':'is_device_scanning'
					}));
				}
				else
				{
					hgwebsdk.socket.close();		
				}
			}
			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';
					setDeviceParamJsonData.device_param.push(ele1);
					
					var ele2 = {};
					ele2.name = '扫描页面';
					ele2.value = '双面';
					setDeviceParamJsonData.device_param.push(ele2);
					
					var ele3 = {};
					ele3.name = '分辨率';
					ele3.value = 200;
					setDeviceParamJsonData.device_param.push(ele3);
					
					//alert(JSON.stringify(setDeviceParamJsonData));
					hgwebsdk.socket.send(JSON.stringify(setDeviceParamJsonData));
				}
				else
				{
					hgwebsdk.socket.close();
				}
			}
			else if ("set_device_param" == message['func'])
			{
				if (0 == message['ret'])
				{
					var startScanJsonData = {};
					startScanJsonData.func = 'start_scan';
					startScanJsonData.get_base64 = false;
					
					//alert(JSON.stringify(startScanJsonData));
					hgwebsdk.socket.send(JSON.stringify(startScanJsonData));
				}
				else
				{
					hgwebsdk.socket.close();
				}
			}
			else if ("start_scan" == message['func'])
			{
				if (0 != message['ret'])
				{
					hgwebsdk.socket.close();
				}
			}
			else if ("scan_begin" == message['func'])
			{
				//
			}
			else if ("scan_end" == message['func'])
			{
				hgwebsdk.socket.close();
			}
			else if ("scan_info" == message['func'])
			{
				// 
			}
			else if ("scan_image" == message['func'])
			{
				var uploadJsonData = {};
				uploadJsonData.func = 'upload_local_file';
				uploadJsonData.file_path = message['image_path'];
				uploadJsonData.upload_mode = 'http';
				uploadJsonData.http_host = host;
				uploadJsonData.http_port = port;
				uploadJsonData.http_path = path;
				
				//alert(JSON.stringify(uploadJsonData));
				hgwebsdk.socket.send(JSON.stringify(uploadJsonData));
				
				var deleteJsonData = {};
				deleteJsonData.func = 'delete_local_file';
				deleteJsonData.file_path = message['image_path'];
				
				//alert(JSON.stringify(deleteJsonData));
				hgwebsdk.socket.send(JSON.stringify(deleteJsonData));
			}
		}
	}
	
	hgwebsdk.socket.onclose = function(msg)
	{ 
		hgwebsdk.socket = null;
	}
	
	hgwebsdk.socket.onerror = function(msg)
	{
		//alert('socket.onerror');
	}
}