'''
Created on 11.06.2015

@author: wn
'''

from MeterbusLibExceptions import MediumConversionException



def bcd(data):
    v = ""
    for c in reversed(data):
        v += str((c & 0xf0) >> 4)
        v += str(c & 0x0f)
    v = int(v)
    return v

def manufCode(data):
    v = (data[1] << 8) + data[0]
    l3 = chr((v & 0x1f) + 64)
    l2 = chr(((v >> 5) & 0x1f) + 64)
    l1 = chr(((v >> 10) & 0x1f) + 64)
    return l1 + l2 + l3


def mediumCode(data):
    try:
        res = ('Other', 
               'Oil', 
               'Electrity', 
               'Gas', 
               'Heat (Volume measured at return temperature: outlet',
               'Steam', 
               'Hot Water', 
               'Water', 
               'Heat Cost Allocator', 
               'Compressed Air',
               'Cooling Load Meter (Volume measured at return temperature: outlet', 
               'Cooling Load Meter (Volume measured at flow temperature: inlet',
               'Heat (Volume measured at flow temperature: inlet)', 
               'Heat / Cooling Load Meter',
               'Bus / System', 
               'Unknown Medium',
               'Reserved (10)',
               'Reserved (11)',
               'Reserved (12)',
               'Reserved (13)',
               'Reserved (14)',
               'Reserved (15)',
               'Cold Water',
               'Dual Water',
               'Pressure',
               'A/D Converter',
               )[data]
        return res
    except IndexError:
        raise MediumConversionException