from rest_framework import serializers
from .models import Exercise


class ExerciseSerializer(serializers.ModelSerializer):
    category_display = serializers.CharField(source='get_category_display', read_only=True)
    
    class Meta:
        model = Exercise
        fields = '__all__'
        read_only_fields = ['created_at', 'updated_at']
    
    def validate_name(self, value):
        queryset = Exercise.objects.filter(name__iexact=value)
        if self.instance:
            queryset = queryset.exclude(pk=self.instance.pk)
        if queryset.exists():
            raise serializers.ValidationError("Eine Übung mit diesem Namen existiert bereits.")
        return value
    
    def create(self, validated_data):
        request = self.context.get('request')
        if request and hasattr(request.user, 'profile') and request.user.profile.club:
            validated_data['club'] = request.user.profile.club
        return super().create(validated_data)