from rest_framework import serializers
from utils import FileFieldSerializer
from .models import Comment, AppVersion


class CommentSerializer(serializers.ModelSerializer):
    """
    Serializer for Comment model with proper file field serialization for avatar
    """
    user_avatar = FileFieldSerializer(required=False, allow_null=True)
    
    class Meta:
        model = Comment
        fields = [
            'id',
            'user_avatar',
            'user_fullname', 
            'user_slogan',
            'comment_text',
            'order',
            'created_at'
        ]
        read_only_fields = ['id', 'created_at']
    
    def validate_user_fullname(self, value):
        if not value or not value.strip():
            raise serializers.ValidationError("User full name is required.")
        return value
    
    def validate_comment_text(self, value):
        if not value or not value.strip():
            raise serializers.ValidationError("Comment text is required.")
        return value



class AppVersionSerializer(serializers.ModelSerializer):
    apk_file = FileFieldSerializer()

    class Meta:
        model = AppVersion
        fields = [
            'id',
            'version',
            'apk_file',
            'description',
            'app_type',
            'app_store_downloads',
            'google_play_downloads',
            'is_active',
            'created_at',
            'updated_at',
        ]
        read_only_fields = ['id', 'created_at', 'updated_at']