import time

class DM:
    def __init__(self, max_history_length=2):
        self.working_history_sep = ""
        self.working_history_consec = ""
        self.chitchat_history_consec = ""
        self.max_history_length = max_history_length
        self.chat_history = []
        self.curr_state = None
    
    def update_history(self):
        to_consider = [x['modified_query'] for x in self.chat_history[-self.max_history_length*2:]]
        self.working_history_consec = " . ".join(to_consider)
        self.working_history_sep = " ||| ".join(to_consider)
        
        chat = []
        for utt in self.chat_history:
            if utt['intent'] == 'CHITCHAT':
                if len(chat) == 4:
                    chat = chat[1:]
                chat.append(utt['modified_query'])
        self.chitchat_history_consec = '. '.join(chat)
                
      
    def get_consec_history(self):
        return self.working_history_consec
    
    def get_chitchat_history(self):
        return self.chitchat_history_consec

    def get_sep_history(self):
        return self.working_history_sep

    def get_recent_state(self):
        return self.curr_state

    def get_dialogue_history(self):
        return self.chat_history

    def update(self, new_state):
        self.chat_history.append(new_state)
        self.curr_state = new_state
        self.update_history()

    def next_action(self):
        if self.curr_state['help']:
            return "Help"
        elif self.curr_state['inactive']:
            return "Recommend"
        elif self.curr_state['is_clear']:
            if self.curr_state['is_offensive']:
                return "OffenseReject"
            else:
                if self.curr_state['intent'] == 'QA':
                    return "RetGen"
                if self.curr_state['intent'] == 'EXPLAINPOST':
                    return "findPost" 
                if self.curr_state['intent'] == 'HELP':
                    return "getHelp"
                elif self.curr_state['intent'] == 'CHITCHAT':
                    return "ConvGen"
                elif self.curr_state['intent'] == 'FINDPAPER':
                    return "findPaper"
                elif self.curr_state['intent'] == 'FINDDATASET':
                    return "findDataset"
                elif self.curr_state['intent'] == 'SUMMARIZEPAPER':
                    return "sumPaper"
                elif self.curr_state['intent'] == 'LISTPAPERS':
                    return "listPapers"
                elif self.curr_state['intent'] == 'LISTDATASETS':
                    return "listDatasets"
                elif self.curr_state['intent'] == 'LISTCOMMANDS':
                    return "listCommands"
                elif self.curr_state['intent'] == 'LISTTOPICS':
                    return "listTopics"
                elif self.curr_state['intent'] == 'LISTRESOURCES':
                    return "listResources"
                elif self.curr_state['intent'] == 'COMMAND':
                    return "command"
                else:
                    return "RetGen"
        else:
            return "Clarify"