#standard libraries
import struct
import re
import pprint
import binascii

from types import MsgType, MsgBlockType

class MsgData(object):
    """ Used as a Message that is being created that will be
        serialized and sent. """

    def __init__(self, name):
        self.name = name
        self.size = 0
        self.blocks = {}

    def add_block(self, block):
        if block.name not in self.blocks:
            self.blocks[block.name] = []

        self.blocks[block.name].append(block)

    def get_block(self, block_name):
        return self.blocks[block_name]

    def add_data(self, block_name, var_name, data, data_size):
        get_block(block_name).add_data(var_name, data, data_size)

class MsgBlockData(object):
    """ Used as a Message block that is being created that will be
        serialized and sent. """

    def __init__(self, name):
        self.name = name
        self.size = 0
        self.vars = {}
        self.var_list = []       #LDE 25oct2008 added a var_list to keep track of the order the vars are listed in the template file
        self.block_number = 0

    def get_variable(self, var_name):
        return self.vars[var_name]

    def get_variables(self):
        return self.vars.values()

    def add_variable(self, var):
        self.vars[var.name] = var
        self.var_list.append(var.name)   #LDE 25oct2008 wanted to keep in entry order for nice display later on

class MsgVariableData(object):
    """ Used as a Message Block variable that is being created that will be
        serialized and sent """
    def __init__(self, name, data, var_type=None):   #LDE 23oct2008 added var_type for display issues
        self.name = name
        #data_size holds info whether or not the variable is of type
        #MVT_VARIABLE
        self.size = -1
        self.data = data
        self.var_type = var_type    #LDE 25oct2008 adding var_type to allow for easier formatting of data in display
    def get_var_type_as_string(self):
        return MsgType.MVT_as_string(self.var_type) #LDE 23oct2008 adding var_type_as_string to allow for easier display

    def get_data_as_string(self):
        if self.var_type == MsgType.MVT_VARIABLE:

            #print '"',self.data[:-1].strip(),'"'
            hexlified =  binascii.hexlify(self.data)
            if 2*len(self.data) == len(hexlified):
                #print 'here i am first!'
                return self.data[:-1] #LDE 23oct2008. Returns hex-string version of var-length data for display
            else:
                #print 'here i am!'
                return binascii.hexlify(self.data)
        elif self.var_type == MsgType.MVT_FIXED:
            return str(struct.unpack('h'*(len(self.data)/2), self.data))
        else: 
            return str(self.data)

    def __repr__(self):
        return self.get_data_as_string()

class MessageTemplateVariable(object):
    """TODO: Add docstring"""

    def __init__(self, name, tp, size):
        self.name = name
        self.type = tp
        self.size = size

    def get_name(self):
        return self.name

    def get_type(self):
        return self.type
    def get_type_as_string(self):             
        return MsgType.MVT_as_string(self.type)      #LDE 23oct2008 Display convenience

class MessageTemplateBlock(object):
    """TODO: Add docstring"""


    def __init__(self, name):
        self.variables = []
        self.variable_map = {}
        self.name = name
        self.block_type = 0
        self.number = 0

    def add_variable(self, var):
        self.variable_map[var.name] = var
        self.variables.append(var)

    def get_variables(self):
        return self.variables #self.variable_map.values()

    def get_variable(self, name):
        return self.variable_map[name]

    def get_name(self):
        return self.name

    def get_block_type(self):
        return self.block_type

    def get_block_type_as_string(self):
        return MsgBlockType.MBT_as_string(self.block_type)  #LDE 23oct2008 Display convenience

    def get_block_number(self):
        return self.number

class MessageTemplate(object):
    frequency_strings = {-1:'fixed', 1:'high', 2:'medium', 4:'low'}      #strings for printout
    depecration_strings = ["Deprecated","UDPDeprecated","NotDeprecated"] #using _as_string methods
    encoding_strings = ["Unencoded","Zerocoded"]  #etc
    trusted_strings = ["Trusted","NotTrusted"]    #etc LDE 24oct2008
    def __init__(self, name):
        self.blocks = []
        self.block_map = {}

        #this is the function or object that will handle this type of message
        self.received_count = 0

        self.name = name
        self.frequency = None
        self.msg_num = 0
        self.msg_num_hex = None
        self.msg_trust = None
        self.msg_deprecation = None
        self.msg_encoding = None

    def add_block(self, block):
        self.block_map[block.name] = block
        self.blocks.append(block)

    def get_blocks(self):
        return self.blocks #self.block_map.values()

    def get_block(self, name):
        return self.block_map[name]

    def get_name(self):
        return self.name

    def get_frequency(self):
        return self.frequency

    def get_frequency_as_string(self):
        return MessageTemplate.frequency_strings[self.frequency]   #LDE 23oct2008 Display convenience

    def get_message_number(self):
        return self.msg_num

    def get_message_hex_num(self):
        return ''.join( [ "%02X" % ord( x ) for x in self.msg_num_hex ] ).strip()

    def get_message_trust(self):
        return self.msg_trust

    def get_message_trust_as_string(self):                 #LDE 23oct2008 Display convenience
        return MessageTemplate.trusted_strings[self.msg_trust]

    def get_message_encoding(self):
        return self.msg_encoding

    def get_message_encoding_as_string(self):   #added _as_string method for easier display
        return MessageTemplate.encoding_strings[self.msg_encoding]

    def get_deprecation(self):
        return self.msg_deprecation

    def get_deprecation_as_string(self):       #added _as_string method for easier display
        return MessageTemplate.depecration_strings[self.msg_deprecation]

"""
Contributors can be viewed at:
http://svn.secondlife.com/svn/linden/projects/2008/pyogp/CONTRIBUTORS.txt 

$LicenseInfo:firstyear=2008&license=apachev2$

Copyright 2009, Linden Research, Inc.

Licensed under the Apache License, Version 2.0 (the "License").
You may obtain a copy of the License at:
    http://www.apache.org/licenses/LICENSE-2.0
or in 
    http://svn.secondlife.com/svn/linden/projects/2008/pyogp/LICENSE.txt

$/LicenseInfo$
"""