from rest_framework import serializers

from .models import ContentBlock, CourseTheme, MediaAsset


class MediaAssetSerializer(serializers.ModelSerializer):
    class Meta:
        model = MediaAsset
        fields = [
            "id", "file_name", "file_path", "file_size", "mime_type",
            "extension", "scan_status", "alt_text", "created_at",
        ]
        read_only_fields = ["id", "file_name", "file_path", "file_size", "mime_type",
                            "extension", "scan_status", "created_at"]


class ContentBlockSerializer(serializers.ModelSerializer):
    media_asset = MediaAssetSerializer(read_only=True)
    media_asset_id = serializers.UUIDField(write_only=True, required=False, allow_null=True)

    class Meta:
        model = ContentBlock
        fields = [
            "id", "page", "order", "block_type", "body",
            "media_asset", "media_asset_id", "embed_url", "caption", "alt_text", "extra",
            "created_at", "updated_at",
        ]
        read_only_fields = ["id", "created_at", "updated_at", "media_asset"]


class CourseThemeSerializer(serializers.ModelSerializer):
    class Meta:
        model = CourseTheme
        fields = ["id", "course", "primary_color", "secondary_color", "logo", "extra"]
        read_only_fields = ["id", "course"]