from django.contrib.auth.models import User
from rest_framework import serializers
from rest_framework.validators import UniqueTogetherValidator
from standards.models import Standards
from chat.models import ChatRoom, ChatMessage

class StandardsSerializer(serializers.ModelSerializer):

    username = serializers.SerializerMethodField('getCreatedByUser')
    last_modified_on = serializers.SerializerMethodField('getFormatedLastModified')

    class Meta:
       model = Standards
       fields = ["id", "name", "last_modified_on", "username", "content"]

    def getCreatedByUser(self, standard):
        return standard.created_standard_by.first_name + " " + standard.created_standard_by.first_name

    def getFormatedLastModified(self, standard):
        return standard.last_modified_on.strftime("%d.%m.%Y %H:%M")


class ChatRoomSerializer(serializers.ModelSerializer):

	class Meta:
		model = ChatRoom
		fields = ["id", "roomname", "roomname_channel"]

class ChatMessageSerializer(serializers.ModelSerializer):
	sendtime = serializers.SerializerMethodField('getFormatedMessageTimeStarted')
	
	class Meta:
		model = ChatMessage
		fields = ["author", "content", "sendtime"]		


class ChatRoomFullSerializer(serializers.ModelSerializer):

	chatroom_createddate = serializers.SerializerMethodField('getFormatedChatStarted')
	#messages = ChatMessageSerializer(many=True)

	class Meta:
		model = ChatRoom
		fields = ["id", "roomname", "roomname_channel", "chatroom_createddate", "chatmembers", "chatmember_single","messages", "creator"]
		depth = 2

	def getFormatedChatStarted(self, chatroom):
		return chatroom.chatroom_createddate.strftime("%d.%m.%Y %H:%M")