from rest_framework import serializers
from .models import Post, Tag
from apps.accounts.serializers import UserSerializer
from apps.media.serializers import CloudflareImageSerializer
from django_cloudflareimages_toolkit.models import CloudflareImage

class TagSerializer(serializers.ModelSerializer):
    class Meta:
        model = Tag
        fields = ["id", "name", "slug"]

class PostListSerializer(serializers.ModelSerializer):
    """Lighter serializer for lists"""
    author = UserSerializer(read_only=True)
    tags = TagSerializer(many=True, read_only=True)
    image = CloudflareImageSerializer(read_only=True)
    
    class Meta:
        model = Post
        fields = [
            "id",
            "title",
            "slug",
            "excerpt",
            "image",
            "author",
            "published_at",
            "tags",
        ]

class PostDetailSerializer(serializers.ModelSerializer):
    author = UserSerializer(read_only=True)
    tags = TagSerializer(many=True, read_only=True)
    image = CloudflareImageSerializer(read_only=True)
    image_id = serializers.PrimaryKeyRelatedField(
        queryset=CloudflareImage.objects.all(), 
        source='image', 
        write_only=True,
        required=False,
        allow_null=True
    )
    
    class Meta:
        model = Post
        fields = [
            "id",
            "title",
            "slug",
            "content",
            "excerpt",
            "image",
            "image_id",
            "author",
            "published_at",
            "is_published",
            "tags",
            "created_at",
            "updated_at",
        ]
        read_only_fields = ["id", "slug", "created_at", "updated_at", "author"]