from rest_framework import serializers
from drf_spectacular.utils import extend_schema_field
from apps.accounts.models import UserProfile, TopList, TopListItem
from apps.accounts.serializers import UserSerializer  # existing shared user serializer


class UserProfileCreateInputSerializer(serializers.ModelSerializer):
    class Meta:
        model = UserProfile
        fields = "__all__"


class UserProfileUpdateInputSerializer(serializers.ModelSerializer):
    class Meta:
        model = UserProfile
        fields = "__all__"
        extra_kwargs = {"user": {"read_only": True}}


class UserProfileOutputSerializer(serializers.ModelSerializer):
    user = UserSerializer(read_only=True)
    avatar_url = serializers.SerializerMethodField()

    class Meta:
        model = UserProfile
        fields = "__all__"

    @extend_schema_field(serializers.URLField(allow_null=True))
    def get_avatar_url(self, obj) -> str | None:
        """Get user avatar URL"""
        # Safely try to return an avatar url if present
        avatar = getattr(obj, "avatar", None)
        if avatar:
            return getattr(avatar, "url", None)
        user_profile = getattr(obj, "user", None)
        if user_profile and getattr(user_profile, "profile", None):
            avatar = getattr(user_profile.profile, "avatar", None)
            if avatar:
                return getattr(avatar, "url", None)
        return None


class TopListItemCreateInputSerializer(serializers.ModelSerializer):
    class Meta:
        model = TopListItem
        fields = "__all__"


class TopListItemUpdateInputSerializer(serializers.ModelSerializer):
    class Meta:
        model = TopListItem
        fields = "__all__"
        # allow updates, adjust as needed
        extra_kwargs = {"top_list": {"read_only": False}}


class TopListItemOutputSerializer(serializers.ModelSerializer):
    # Remove the ride field since it doesn't exist on the model
    # The model likely uses a generic foreign key or different field name

    class Meta:
        model = TopListItem
        fields = "__all__"


class TopListCreateInputSerializer(serializers.ModelSerializer):
    class Meta:
        model = TopList
        fields = "__all__"


class TopListUpdateInputSerializer(serializers.ModelSerializer):
    class Meta:
        model = TopList
        fields = "__all__"
        # user is set by view's perform_create
        extra_kwargs = {"user": {"read_only": True}}


class TopListOutputSerializer(serializers.ModelSerializer):
    user = UserSerializer(read_only=True)
    items = TopListItemOutputSerializer(many=True, read_only=True)

    class Meta:
        model = TopList
        fields = "__all__"