#!/usr/bin/env python

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'''
This script includes methods to
(1) generate name of layer, parameter, etc.
(2) set field values for proto.
'''

LAYERID = 0
PARAMID = 0

def generate_name(label, option=0, withnumber=True):
    ''' This method returns name of layer or parameter with unique id.
        option: 1 to increase id number
        withnumber: True to concatenate number to name
    '''

    global LAYERID, PARAMID
    num = LAYERID
    if label == 'layer':
        if option == 1: LAYERID += 1
        num = LAYERID
    elif label == 'param':
        if option == 1: PARAMID += 1
        num = PARAMID
    else:
        if option == 1: LAYERID += 1
        num = LAYERID
        if option == 2:
            num = LAYERID+1

    if withnumber == False:
        return '{0}'.format(label)

    return '{0}{1}'.format(label, num)

def setval(proto, **kwargs):
    ''' This method sets field values for give proto.
    '''

    for key, val in kwargs.items():
        #print 'kv: ', k, ', ', v
        if hasattr(proto, key):
            flabel = proto.DESCRIPTOR.fields_by_name[key].label
            ftype = proto.DESCRIPTOR.fields_by_name[key].type

            fattr = getattr(proto, key)
            if flabel == 3: # repeated field
                if ftype == 11: # message type
                    fattr = fattr.add()
                    fattr.MergeFrom(val)
                else:
                    if type(val) == list or type(val) == tuple:
                        for i in range(len(val)):
                            fattr.append(val[i])
                    else:
                        fattr.append(val)
            else:
                if ftype == 11: # message type
                    fattr = getattr(proto, key)
                    fattr.MergeFrom(val)
                else:
                    setattr(proto, key, val)