from rest_framework import serializers

from core.apps.chat.models import ChatroomModel


class MemberSerializer(serializers.Serializer):
    id = serializers.IntegerField()
    full_name = serializers.SerializerMethodField()
    role = serializers.CharField()

    def get_full_name(self, obj):
        name = obj.get_full_name().strip()
        return name if name else str(obj.phone)


class BaseChatroomSerializer(serializers.ModelSerializer):
    members = serializers.SerializerMethodField()

    def get_members(self, obj):
        return [
            {
                "id": u.id,
                "full_name": (u.get_full_name().strip() or str(u.phone)),
                "role": u.role,
            }
            for u in obj.members.only("id", "first_name", "last_name", "phone", "role")
        ]

    class Meta:
        model = ChatroomModel
        fields = [
            "id",
            "type",
            "auto_evaluation",
            "members",
            "created_at",
        ]


class ListChatroomSerializer(BaseChatroomSerializer):
    class Meta(BaseChatroomSerializer.Meta): ...


class RetrieveChatroomSerializer(BaseChatroomSerializer):
    class Meta(BaseChatroomSerializer.Meta): ...


class CreateChatroomSerializer(serializers.ModelSerializer):
    type = serializers.ChoiceField(
        choices=["auto_evaluation", "direct"],
        required=True,
    )

    class Meta:
        model = ChatroomModel
        fields = [
            "type",
            "auto_evaluation",
            "members",
        ]

    def validate(self, attrs):
        room_type = attrs.get("type")
        if room_type == "auto_evaluation" and not attrs.get("auto_evaluation"):
            raise serializers.ValidationError(
                {"auto_evaluation": "auto_evaluation turi uchun AutoEvaluation majburiy."}
            )
        return attrs