from drf_spectacular.utils import extend_schema_field
from rest_framework import serializers

from apps.chat.models import Conversation, ConversationParticipant


class CreateConversationSerializer(serializers.Serializer):
    user_1_uuid = serializers.UUIDField()
    user_2_uuid = serializers.UUIDField()


class ConversationUserActionSerializer(serializers.Serializer):
    user_uuid = serializers.UUIDField()


class ConversationSerializer(serializers.ModelSerializer):
    participants = serializers.SerializerMethodField()

    class Meta:
        model = Conversation
        fields = ["uuid", "type", "status", "closed_by_uuid", "created_at", "participants"]

    @extend_schema_field(serializers.ListField(child=serializers.UUIDField()))
    def get_participants(self, obj):
        return list(
            ConversationParticipant.objects.filter(conversation_id=obj.uuid)
            .order_by("joined_at")
            .values_list("user_uuid", flat=True)
        )


class ConversationListSerializer(serializers.Serializer):
    uuid = serializers.UUIDField()
    type = serializers.CharField()
    status = serializers.CharField()
    closed_by_uuid = serializers.UUIDField(allow_null=True)
    created_at = serializers.DateTimeField()
    participants = serializers.ListField(child=serializers.UUIDField())
    has_unread = serializers.BooleanField()
    last_message = serializers.DictField(allow_null=True, required=False)