import logging

def relativeUsage(encPowerUsageAC, baysInUseCount, servers):
    # Input validation
    if not type(encPowerUsageAC) is int:
        raise TypeError("relativeUsage: command must be an integer, '" + str(encPowerUsageAC) + "' is not.")
    if not type(baysInUseCount) is int:
        raise TypeError("relativeUsage: command must be an integer, '" + str(baysInUseCount) + "' is not.")
    if not type(servers) is list:
        raise TypeError("relativeUsage: command must be a list, '" + str(servers) + "' is not.")

    # Add up the total DC usage of blades.
    absoluteBladesUsage = 0
    for n in range(baysInUseCount):
        absoluteBladesUsage += servers[n][6]
    # absoluteBladesUsage = sum(totalBladesUsage)
    logging.info("Blade raw usage DC: " + str(absoluteBladesUsage))

    # Get the relative percentage multiplier for blades AC.
    percentageMultiplier = encPowerUsageAC / absoluteBladesUsage

    for n in range(baysInUseCount):
        servers[n].append( round(servers[n][6] * percentageMultiplier) ) # Multiply to get the relative AC usage of the blade.
    
    srvAvg = 0
    for n in range(baysInUseCount):
        srvAvg += servers[n][7]
    serversAverageAC = round(srvAvg / baysInUseCount)

    return serversAverageAC, servers

# Testing data:
#encPowerUsageAC = 1775
#baysInUseCount = 11
#servers = [[1, 'tty-lab-1', '', 'OK', 'On', 'Off', 144], [2, 'tty-lab-2', 'CZ320263P9', 'OK', 'On', 'Off', 86], [3, 'tty-lab-3', 'CZJ14410KP', 'Failed', 'On', 'Off', 129], [4, 'kspve1', 'CZJ14410KK', 'OK', 'On', 'Off', 87], [5, 'kspve2-2', '', 'OK', 'On', 'Off', 87], [6, 'kspve3', '', 'OK', 'On', 'Off', 82], [7, 'plaes-blade', '', 'OK', 'On', 'Off', 81], [8, 'Ringly-01', 'CZ3402Y48C', 'OK', 'On', 'Off', 124], [9, 'toomas-lepik', 'CZ3217FNYE', 'OK', 'On', 'Off', 132], [10, 'toomas-lepik2', 'CZ3217FFSS', 'OK', 'On', 'Off', 101], [12, 'erki-naumanis', '', 'OK', 'On', 'Off', 88]]
#print(relativeUsage(encPowerUsageAC, baysInUseCount, servers))