package worldData;
import java.util.Date;

public class RecordPS2Tap {
	public String serialNumber;
	public int sequenceNumber;

	/* PowerSyncII values */
	public int system_state, last_fault, user_state, autorun_enabled, autostart_count;
	public int bus_voltage, ac_voltage, dc_current, dc_voltage;
	public int ac_frequency, output_power, energy_produced;

	public int lCRC, rCRC;
	public Date rxDate;
	
	public RecordPS2Tap() {
		lCRC=-1;
		rCRC=-2;
	}
	
	public boolean isValid() {
		return lCRC==rCRC;
	}
	
	public int crc_chk(int data[],int start, int length) {
		int j;
		int reg_crc=0xFFFF;

		for ( int i=start ; i<(length+start) ; i++ ) {
			reg_crc ^= data[i];

			for ( j=0 ; j<8 ; j++ ) {
					if ( (reg_crc&0x01) == 1 ) { 
						reg_crc=(reg_crc>>1) ^ 0xA001;
					} else {
						reg_crc=reg_crc>>1;
					}
				}	
			}
	
			return reg_crc;
	}
	
	public void parseRecord(int[] buff) {
		rxDate = new Date();
		
		StringBuilder sb = new StringBuilder();
		
		/* Serial number */
		sb.append((char) buff[1]);
		sb.append((buff[2] << 8) + buff[3] );
		serialNumber=sb.toString();
				
		/* packet length */
		if ( 34 != buff[4] ) {
			return;
		}
		
		/* packet type */
		if ( 14 != buff[5] ) {
			return;
		}
		
		/* remote values */
		system_state = (buff[6]<<8) + buff[7];
		last_fault = (buff[8]<<8) + buff[9];
		user_state = (buff[10]<<8) + buff[11];
		autorun_enabled = (buff[12]<<8) + buff[13];
		bus_voltage = (buff[14]<<8) + buff[15];
		ac_voltage = (buff[16]<<8) + buff[17];
		dc_current = (buff[18]<<8) + buff[19];
		dc_voltage = (buff[20]<<8) + buff[21];
		ac_frequency = (buff[22]<<8) + buff[23];
		
		/* output power is signed */
		output_power = (buff[24]<<8) + buff[25];
		if ( output_power > 32767 )
			output_power=output_power-65536;
		
		energy_produced = (buff[26]<<8) + buff[27];
		autostart_count = (buff[28]<<8) + buff[29];

		/* sequence number */
		sequenceNumber = (buff[30] << 8) + buff[31];

		/* remote CRC */
		rCRC=(buff[32] << 8) + buff[33];
		lCRC=crc_chk(buff,1,31);
	}	
}