from rest_framework import serializers
from django.utils import timezone
from datetime import timedelta
from .models import BrowsingHistory


class BrowsingHistorySerializer(serializers.ModelSerializer):
    class Meta:
        model = BrowsingHistory
        fields = ['id', 'type', 'title', 'description', 'image', 'category', 'link', 'viewed_at']
        read_only_fields = ['viewed_at']


class BrowsingHistoryCreateSerializer(serializers.ModelSerializer):
    class Meta:
        model = BrowsingHistory
        fields = ['type', 'title', 'description', 'image', 'category', 'link']

    def create(self, validated_data):
        user = self.context['request'].user
        link = validated_data.get('link', '')
        today = timezone.now().date()
        existing = BrowsingHistory.objects.filter(
            user=user, link=link, viewed_at__date=today
        ).first()
        if existing:
            existing.save()
            return existing
        return BrowsingHistory.objects.create(user=user, **validated_data)