from rest_framework import serializers
from backend.models import Snippet, SnippetParticipant
from django.contrib.auth.models import User


class UserSerializer(serializers.ModelSerializer):
    snippets = serializers.PrimaryKeyRelatedField(many=True, queryset=Snippet.objects.all())

    class Meta:
        model = User
        fields = ['id', 'username', 'snippets']


class SnippetSerializer(serializers.ModelSerializer):
    class Meta:
        model = Snippet
        fields = [
            "id",
            "created",
            "title",
            "linenos",
            "language",
            "style",
            "owner",
            "access"
        ]
        read_only_fields = ["created", "owner"]
        owner = serializers.ReadOnlyField(source='owner.username')


class SnippetParticipantSerializer(serializers.ModelSerializer):
    class Meta:
        model = SnippetParticipant
        fields = [
            "id",
            "user",
            "snippet"
        ]
        read_only_fields = ["id"]