import random

user = []
jokes = [
    ["Testing","Testing you!"],
    ["singing pokemon","Jiggalypuff! 🎙️"]
]
#jokes = []

def handle_command(state,message):
    for command in commands:
        if command in message:
            result = commands[command](state,message)           
            print("Bot: "+result["response"])
            return result["state"]
        else:
            if len(user) > 0:
                try:
                    result = commands[user[0]](state,message)
                    print("Bot: "+result["response"])
                    return result["state"]
                except:
                    print(e)
                    print("Error saving state:",message)
                    pass
    return state

    """
    Knock-knock implimentation
    
    when you receive message, read state.
    user: knock knock
    bot: who's there? -> bot responds and registers state 
    (user.state=[knock-knock])
    user: {statement}
    bot: {statement} who? -> bot responds and stores statement
    (user.stage=[knock-knock,{statement}])
    user: {punchline}
    bot: Nice one! -> bot saves knock-knock joke
    """
    
def nevermind(state,message):
    return {
        "response":"starting over.",
        "state":[]
    }

def knock_knock(state,message):
    #return {response:"",state:""}
    try:
        if state[0] != "knock knock":
            #clear the state
            state = []  
    except:
        pass
    if len(state) == 0:
        state.append("knock knock")
        return {
            "response":"Who's there?",
            "state": state
        }
    if len(state) == 1:
        state.append(message)
        return {
            "response":message + " who?",
            "state":state
        }
    if len(state) == 2:
        state.append(message)
        jokes.append([
            state[1],state[2]
        ])
        print("joke registered.")
        return {
            "response":"Hah! very funny!",
            "state":[]
        }
        
    return {
        "response":"Cleared.",
        "state":[]
    }

"""'joke' command
    -------------
    user:!joke
    bot:Knock knock -> bot initializes state
    (user.state=[joke])
    user: Who's there?
    bot: {statement} -> bot responds with chosen joke
    (user.state=[joke,chosenjoke])
    user: {statement} who?
    bot: 
    
    """
def joke(state,message):
    if len(jokes) == 0:
        return {
            "response":"I don't know any jokes...",
            "state":[]
        }
    try:
        if state[0] != "joke":
            state = []
    except:
        pass
    
    if len(state) == 0:
        return {
            "response":"Knock knock",
            "state":["joke"]
        }
    if len(state) == 1:
        if message.find("there?") > 0 :
            #get random joke index
            state.append(random.randint(0,len(jokes)-1))
            return {
                "response":jokes[state[1]][0],
                "state":state
            }
        else:
            return {
                "response":"ask, \"who's there?\"",
                "state":state
            }
    if len(state) == 2:
        if  message.find("who?") > 0:
            return {
                "response":jokes[state[1]][1],
                "state":[]               
            }
        else:
            return {
                "response":"ask, \""+ jokes[state[1]][0] +" who?\"",
                "state":state
            }
        
    return state
        

commands = {
    "nevermind":nevermind,
    "knock knock":knock_knock,
    "joke":joke
}




if __name__ == '__main__':
    msg = ""
    while msg != "exit":
        msg = input("user:")
        user = handle_command(user,msg)
        #print("state:",user)