"""
Serializers for review-related API endpoints.
"""

from rest_framework import serializers
from apps.parks.models.reviews import ParkReview
from apps.rides.models.reviews import RideReview
from apps.accounts.models import User


class ReviewUserSerializer(serializers.ModelSerializer):
    """Serializer for user information in reviews."""

    avatar_url = serializers.SerializerMethodField()
    display_name = serializers.SerializerMethodField()

    class Meta:
        model = User
        fields = ["username", "display_name", "avatar_url"]

    def get_avatar_url(self, obj):
        """Get the user's avatar URL."""
        if hasattr(obj, "profile") and obj.profile:
            return obj.profile.get_avatar()
        return "/static/images/default-avatar.png"

    def get_display_name(self, obj):
        """Get the user's display name."""
        return obj.get_display_name()


class LatestReviewSerializer(serializers.Serializer):
    """Serializer for latest reviews combining park and ride reviews."""

    id = serializers.IntegerField()
    type = serializers.CharField()  # 'park' or 'ride'
    title = serializers.CharField()
    content_snippet = serializers.CharField()
    rating = serializers.IntegerField()
    created_at = serializers.DateTimeField()
    user = ReviewUserSerializer()

    # Subject information (park or ride)
    subject_name = serializers.CharField()
    subject_slug = serializers.CharField()
    subject_url = serializers.CharField()

    # Park information (for ride reviews)
    park_name = serializers.CharField(allow_null=True)
    park_slug = serializers.CharField(allow_null=True)
    park_url = serializers.CharField(allow_null=True)

    def to_representation(self, instance):
        """Convert review instance to serialized representation."""
        if isinstance(instance, ParkReview):
            return {
                "id": instance.pk,
                "type": "park",
                "title": instance.title,
                "content_snippet": self._get_content_snippet(instance.content),
                "rating": instance.rating,
                "created_at": instance.created_at,
                "user": ReviewUserSerializer(instance.user).data,
                "subject_name": instance.park.name,
                "subject_slug": instance.park.slug,
                "subject_url": f"/parks/{instance.park.slug}/",
                "park_name": None,
                "park_slug": None,
                "park_url": None,
            }
        elif isinstance(instance, RideReview):
            return {
                "id": instance.pk,
                "type": "ride",
                "title": instance.title,
                "content_snippet": self._get_content_snippet(instance.content),
                "rating": instance.rating,
                "created_at": instance.created_at,
                "user": ReviewUserSerializer(instance.user).data,
                "subject_name": instance.ride.name,
                "subject_slug": instance.ride.slug,
                "subject_url": f"/parks/{instance.ride.park.slug}/rides/{instance.ride.slug}/",
                "park_name": instance.ride.park.name,
                "park_slug": instance.ride.park.slug,
                "park_url": f"/parks/{instance.ride.park.slug}/",
            }
        return {}

    def _get_content_snippet(self, content, max_length=150):
        """Get a snippet of the review content."""
        if len(content) <= max_length:
            return content

        # Find the last complete word within the limit
        snippet = content[:max_length]
        last_space = snippet.rfind(" ")
        if last_space > 0:
            snippet = snippet[:last_space]

        return snippet + "..."