from rest_framework import serializers
from django.db.models import Avg
from core.apps.api.models import FeedbackModel, FeedbackImageModel, AdModel


class FeedbackImageSerializer(serializers.ModelSerializer):
    class Meta:
        model = FeedbackImageModel
        fields = ["id", "image"]
        read_only_fields = ["id"]


class FeedbackListSerializer(serializers.ModelSerializer):
    """List serializer for feedback with user and ad info"""
    user_name = serializers.CharField(source="user.username", read_only=True)
    ad_name = serializers.CharField(source="ad.name", read_only=True)
    images = FeedbackImageSerializer(many=True, read_only=True)

    class Meta:
        model = FeedbackModel
        fields = [
            "id",
            "star",
            "user",
            "user_name",
            "ad",
            "ad_name",
            "comment",
            "images",
            "created_at"
        ]
        read_only_fields = ["id", "user", "user_name", "ad_name", "created_at"]


class FeedbackDetailSerializer(FeedbackListSerializer):
    """Detailed feedback serializer"""
    class Meta(FeedbackListSerializer.Meta):
        fields = FeedbackListSerializer.Meta.fields + ["updated_at"]


class FeedbackCreateSerializer(serializers.ModelSerializer):
    """Create feedback serializer"""
    images = serializers.ListField(
        child=serializers.ImageField(),
        write_only=True,
        required=False
    )

    class Meta:
        model = FeedbackModel
        fields = ["ad", "star", "comment", "images"]

    def validate_star(self, value):
        """Validate star rating is between 1 and 5"""
        if not 1 <= value <= 5:
            raise serializers.ValidationError("Rating must be between 1 and 5")
        return value

    def create(self, validated_data):
        images_data = validated_data.pop("images", [])
        validated_data["user"] = self.context["request"].user
        
        feedback = FeedbackModel.objects.create(**validated_data)
        
        # Create feedback images
        for image_data in images_data:
            FeedbackImageModel.objects.create(
                feedback=feedback,
                image=image_data
            )
        
        return feedback


class FeedbackUpdateSerializer(serializers.ModelSerializer):
    """Update feedback serializer"""
    class Meta:
        model = FeedbackModel
        fields = ["star", "comment"]

    def validate_star(self, value):
        if not 1 <= value <= 5:
            raise serializers.ValidationError("Rating must be between 1 and 5")
        return value