// Thermokon Sensortechnik GmbH 
// Payload Decoder for Thermokon LoRaWAN devices
// Template: Adaption to corresponding NS/AS necessary
// -Revision B-
// -Subject to change without further notice!
//*********************************************************
// Changelog: 	- Added Identifiers for addtitional features (eg. NOVOS 3 INC EPD,...) 
//				- Removed Identifiers which were not used
//				- Changed objectnames for quick access (1-Byte) identifier
//*********************************************************
// Questions or remarks:support@thermokon.de

//Decoder Mode
var DecoderLegacyMode = false;
//Only set to "true" if former object identifier must be used


var LPP_S_TEMP_0 = 0x0010;
var LPP_S_RHUM_0 = 0x0011;
var LPP_S_CO2_0 = 0x0012;
var LPP_S_VOC_0 = 0x0013;
var LPP_S_MOISTURE_0 = 0x0014;
var LPP_S_ATM_P_0 = 0x0030;
var LPP_S_DIF_P_0 = 0x0031;
var LPP_S_FLOW_0 = 0x0032;
var LPP_S_LIGHT_0 = 0x0040;
var LPP_S_OCCU_0 = 0x0041;
var LPP_S_REED_0 = 0x0050;
var LPP_S_CONDENSATION_0 = 0x0051;
var LPP_S_VBAT_0 = 0x0054;
var LPP_S_BUTTON_0 = 0x0055;
var LPP_S_DI_0 = 0x0058;
var LPP_S_SETPOINT_0 = 0x0063;
var LPP_TEMP_1 = 0x9100;
var LPP_MOISTURE_1 = 0x9140;
var LPP_DIF_P_1 = 0x9310;
var LPP_FLOW_1 = 0x9320;
var LPP_OCCU_1 = 0x9410;
var LPP_REED_1 = 0x9500;
var LPP_BUTTON_1 = 0x9550;
var LPP_DI_1 = 0x9580;
var LPP_SETPOINT_1 = 0x9630;
var LPP_TEMP_2 = 0xA100;
var LPP_DEV_KEY = 0xC000;
var LPP_EPD_VALUE_EXT_OVERLOAD_0 = 0xC194;
var LPP_EPD_VALUE_EXT_OVERLOAD_1 = 0xC19C;
var LPP_EPD_VALUE_EXT_OVERLOAD_2 = 0xC1A4;
var LPP_EPD_VALUE_EXT_OVERLOAD_3 = 0xC1AC;
var LPP_FORCED_UPLINK = 0xC230;

function u16_to_s16(u16) {
	var s16 = u16&0xFFFF;
	if (0x8000 & s16){s16 = - (0x010000 - s16);}
	return s16;
}
function u8_to_s8(u8) {
	var s8=u8&0xFF;
	if (0x80 & s8) {s8 = - (0x0100 - s8);}
	return s8;
}

function DecodeLPPPayload(data) {
	var obj = {};	

	for(i=0;i<data.length;i++){
		var lpp = 0;
		if(data[i] <= 0x7F) {lpp = data[i]; i++;}
		else {lpp = (data[i] << 8) + data[i + 1]; i+=2;}

		switch(lpp){
			case LPP_S_TEMP_0:
				if(DecoderLegacyMode==false)
				{obj.TEMP_0 = u16_to_s16(data[i] << 8 | data[i+1]) / 10;}
				else if(DecoderLegacyMode==true)
				{obj.TEMP = u16_to_s16(data[i] << 8 | data[i+1]) / 10;}
				i++;
			break;
			case LPP_S_RHUM_0:
				if(DecoderLegacyMode==false)
				{obj.RHUM_0 = u8_to_s8(data[i]) / 1;}
				else if(DecoderLegacyMode==true)
				{obj.RHUM = u8_to_s8(data[i]) / 1;}
			break;
			case LPP_S_CO2_0:
				if(DecoderLegacyMode==false)
				{obj.CO2_0 = (data[i]<<8 | data[i+1]) / 1;}
				else if(DecoderLegacyMode==true)
				{obj.CO2 = (data[i]<<8 | data[i+1]) / 1;}
				i++;
			break;
			case LPP_S_VOC_0:
				if(DecoderLegacyMode==false)
				{obj.VOC_0 = (data[i]<<8 | data[i+1]) / 1;}
				else if(DecoderLegacyMode==true)
				{obj.VOC = (data[i]<<8 | data[i+1]) / 1;}
				i++;
			break;
			case LPP_S_MOISTURE_0:
				obj.MOISTURE_0 = u16_to_s16(data[i] << 8 | data[i+1]) / 1;
				i++;
			break;
			case LPP_S_ATM_P_0:
				if(DecoderLegacyMode==false)
				{obj.ATM_P_0 = (data[i]<<8 | data[i+1]) / 1}
				else if(DecoderLegacyMode==true)
				{obj.ATM_P = (data[i]<<8 | data[i+1]) / 1;}
				i++;
			break;
			case LPP_S_DIF_P_0:
				if(DecoderLegacyMode==false)
				{obj.DIF_P_0 = u16_to_s16((data[i]<<8 | data[i+1]) / 1)}
				else if(DecoderLegacyMode==true)
				{obj.DP = u16_to_s16((data[i]<<8 | data[i+1]) / 1)}
				i++;
			break;
			case LPP_S_FLOW_0:
				if(DecoderLegacyMode==false)
				{obj.FLOW_0 = (data[i]<<8 | data[i+1]) / 1;}
				else if(DecoderLegacyMode==true)
				{obj.FLOW = (data[i]<<8 | data[i+1]) / 1;}
				i++;
			break;			
			case LPP_S_LIGHT_0:
				if(DecoderLegacyMode==false)
				{obj.LIGHT_0 = (data[i]<<8 | data[i+1]) / 1;}
				else if(DecoderLegacyMode==true)
				{obj.VISIBLE_LIGHT = (data[i]<<8 | data[i+1]) / 1;}
				i++;
			break;			
			case LPP_S_OCCU_0:
				if(DecoderLegacyMode==false)
				{obj.OCCU_0_STATE = data[i] & 0x01;
				obj.OCCU_0_CNT = data[i] >> 1;}						
				else if(DecoderLegacyMode==true)
				{obj.OCCU0_STATE = data[i] & 0x01;
				 obj.OCCU0_CNT = data[i] >> 1;}
			break;			
			case LPP_S_REED_0:
				if(DecoderLegacyMode==false)
				{obj.REED_0_STATE = data[i] & 0x01;
				obj.REED_0_CNT = data[i] >> 1;}						
				else if(DecoderLegacyMode==true)
				{obj.REED0_STATE = data[i] & 0x01;
				 obj.REED0_CNT = data[i] >> 1;}
			break;				
			case LPP_S_CONDENSATION_0:
				if(DecoderLegacyMode==false)
				{obj.CONDENSATION_0_STATE = (data[i] >>> 7);
				obj.CONDENSATION_0_RAW = (u16_to_s16(data[i] << 8 | data[i+1]) / 1)&0x0FFF;
				i++;}
				else if(DecoderLegacyMode==true)
				{obj.CONDENSATION_STATE = (data[i] >>> 7);
				obj.CONDENSATION_RAW = (u16_to_s16(data[i] << 8 | data[i+1]) / 1)&0x0FFF;
				i++;}
			break;						
			case LPP_S_VBAT_0:
				if(DecoderLegacyMode==false)
				{obj.VBAT_0 = data[i] / (1.0/20);}
				else if(DecoderLegacyMode==true)
				{obj.VBAT = data[i] / (1.0/20);}
			break;				
			case LPP_S_BUTTON_0:
				if(data[i]>=2)
                    	{obj.BUTTON_0_PRESSED = 1}	
				else
				    {obj.BUTTON_0_PRESSED = 0}	

				if (data[i] & 0x01 >= 1)
                	{obj.BUTTON_0_LAST_TYPE = "Long Press"}
				else
				    {obj.BUTTON_0_LAST_TYPE = "Short Press"}

				obj.BUTTON_0_CNT = data[i] >> 1;
            		break;
			case LPP_S_DI_0:
				obj.DI_0_STATE = data[i] & 0x01;
				obj.DI_0_CNT = data[i] >> 1;
			break;
			case LPP_S_SETPOINT_0:
				if(DecoderLegacyMode==false)
				{obj.SETPOINT_0 = data[i] / 1;}
				else if(DecoderLegacyMode==true)
				{obj.SETPOINT = data[i] / 1;}
			break;    	                     
			case LPP_TEMP_1:
				obj.TEMP_1 = u16_to_s16(data[i] << 8 | data[i+1]) / 10;
				i++;
			break;
			case LPP_MOISTURE_1:
				obj.MOISTURE_1 = (data[i] << 8 | data[i+1]) / 1;
				i++;
			break;			
			case LPP_DIF_P_1 :				
				obj.DIF_P_1 = u16_to_s16((data[i]<<8 | data[i+1]) / 1)
				i++;
			break;
			case LPP_FLOW_1:				
				obj.FLOW_1 = (data[i]<<8 | data[i+1]) / 1;
				i++;
			break;
			case LPP_REED_1:
				if(DecoderLegacyMode==false)
				{obj.REED_1_STATE = data[i] & 0x01;
				obj.REED_1_CNT = data[i] >> 1;}						
				else if(DecoderLegacyMode==true)
				{obj.REED1_STATE = data[i] & 0x01;
				 obj.REED1_CNT = data[i] >> 1;}
			break;	           
			case LPP_BUTTON_1:			
				if(data[i]>=2)
				    {obj.BUTTON_1_PRESSED = 1}	
				else
				    {obj.BUTTON_1_PRESSED = 0}

				if (data[i] & 0x01 >= 1)
				    {obj.BUTTON_1_LAST_TYPE = "Long Press"}
				else
				    {obj.BUTTON_1_LAST_TYPE = "Short Press"}

				obj.BUTTON_1_CNT = data[i] >> 1;
			break;
			case LPP_DI_1:
				obj.DI_1_STATE = data[i] & 0x01;
				obj.DI_1_CNT = data[i] >> 1;
			break;            
			case LPP_SETPOINT_1:
				obj.SETPOINT_1 = (data[i] << 8 | data[i+1]) / 10;
				i++;
			break;            
			case LPP_TEMP_2:
				obj.TEMP_2 = u16_to_s16(data[i] << 8 | data[i+1]) / 10;
				i++;
			break;			
			case LPP_DEV_KEY:
				obj.DEV_KEY = (data[i] << 8 | data[i+1]) / 1;
				i++;
			break;            
			case LPP_EPD_VALUE_EXT_OVERLOAD_0:
				obj.EPD_VALUE_EXT_OVERLOAD_0 = u16_to_s16(data[i] << 8 | data[i+1]) / 1;
				i++;
			break;
			case LPP_EPD_VALUE_EXT_OVERLOAD_1:
				obj.EPD_VALUE_EXT_OVERLOAD_1 = u16_to_s16(data[i] << 8 | data[i+1]) / 1;
				i++;
			break;
			case LPP_EPD_VALUE_EXT_OVERLOAD_2:
				obj.EPD_VALUE_EXT_OVERLOAD_2 = u16_to_s16(data[i] << 8 | data[i+1]) / 1;
				i++;
			break;
			case LPP_EPD_VALUE_EXT_OVERLOAD_3:
				obj.EPD_VALUE_EXT_OVERLOAD_3 = u16_to_s16(data[i] << 8 | data[i+1]) / 1;
				i++;
			break;            
			case LPP_FORCED_UPLINK:
				obj.FORCED_UPLINK = (data[i] << 8 | data[i+1]) / 1;
				i++;
			break;            
			default: //somthing is wrong with data
				i = data.length;
			break;
		}
	}
	return obj;
}

function decodeUplink(input) {
	var warnings = [];
	warnings.push();
	var data = DecodeLPPPayload(input.bytes);
	return {data,warnings};
}