# npc_dialog.py - Dialog helper class
#
# Copyright (C) 2007 David Delbecq
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
#
# This is a simple script that make use of CFDialog.py and receive it's
# parameters from a JSON inside the event message. Alternativey, the JSON
# parameters, if >= 4096 characters, can be stored in a file that will be
# loaded. Use the classical script parameter to specify relative location
# of dialog.
# exemple
#{
#  "location" : "test_grandpa_01",
#  "rules": [
#  {
#    "match" : "hello|hi",
#    "pre" : [["hello","0"]],
#    "post" : [["hello","1"]],
#    "msg" : ["Hello, lad!","Hi, young fellow!","Howdy!"]
#  },
#  {
#    "match": "hello|hi",
#    "pre" :[["hello","1"]],
#    "post" :[["hello", "*"]],
#    "msg" : ["I've heard, you know, I'm not deaf *grmbl*"]
#  },
#  {
#    "match" : "*",
#    "pre" : [["hello","*"]],
#    "post" : [["hello", "*"]],
#    "msg" : ["What ?", "Huh ?", "What do you want ?"]
#  }
#]}
# The pre and post in rule are variable to test and set depending on that dialog rule.
# For example, first rule applie if "hello" is set to "0"  (default) and immediatly 
# sets it to "1" when rule is used.
# the Double [ around pre and post are needed. The pre and post are
# arrays of arrays. Each item in pre and post is an array of [variable,value]
# The match is the rule to apply to what user says

import Crossfire
import os

from CFDialog import DialogRule, Dialog
import cjson
def ruleConnected(character,rule):
        m = character.Map
        m.TriggerConnected(rule.connected,1)
event = Crossfire.WhatIsEvent()
player = Crossfire.WhoIsActivator()
npc = Crossfire.WhoAmI()
if (Crossfire.ScriptParameters() != None):
    filename = os.path.join(Crossfire.DataDirectory(),Crossfire.MapDirectory(),Crossfire.ScriptParameters())
    try:
        f = open(filename,'rb')
    except:
        raise 'Unable to read %s' % filename
    else:
        Crossfire.Log(Crossfire.LogDebug,"Reading from file %s" %filename)
        parameters=cjson.decode(f.read())
        f.close()
else:
    parameters = cjson.decode(event.Message)
location = parameters["location"];
speech = Dialog(player, npc, location)
index=0;

for jsonRule in parameters["rules"]:
    if (jsonRule.has_key("connected")):
        rule = DialogRule(jsonRule["match"], jsonRule["pre"], jsonRule["msg"], jsonRule["post"],None,ruleConnected);
        rule.connected = jsonRule["connected"]
    else:
        rule = DialogRule(jsonRule["match"], jsonRule["pre"], jsonRule["msg"], jsonRule["post"])
    speech.addRule(rule,index)
    index=index+1
        
if speech.speak(Crossfire.WhatIsMessage()) == 0:
    Crossfire.SetReturnValue(1)