from rest_framework import serializers
from .models import Activity, ActivitySignup, Topic, Reply, TopicMedia
from shop.serializers import WeChatUserSerializer, ESP32ConfigSerializer, ServiceSerializer, VCCourseSerializer

class ActivitySerializer(serializers.ModelSerializer):
    display_banner_url = serializers.ReadOnlyField()
    
    class Meta:
        model = Activity
        fields = '__all__'

class ActivitySignupSerializer(serializers.ModelSerializer):
    class Meta:
        model = ActivitySignup
        fields = ['id', 'activity', 'user', 'signup_time', 'status']
        read_only_fields = ['signup_time', 'status']

class TopicMediaSerializer(serializers.ModelSerializer):
    class Meta:
        model = TopicMedia
        fields = ['id', 'file', 'media_type', 'created_at']

class ReplySerializer(serializers.ModelSerializer):
    author_info = WeChatUserSerializer(source='author', read_only=True)
    media = TopicMediaSerializer(many=True, read_only=True)

    class Meta:
        model = Reply
        fields = ['id', 'topic', 'content', 'author', 'author_info', 'reply_to', 'media', 'created_at']

class TopicSerializer(serializers.ModelSerializer):
    author_info = WeChatUserSerializer(source='author', read_only=True)
    replies = ReplySerializer(many=True, read_only=True)
    media = TopicMediaSerializer(many=True, read_only=True)
    is_verified_owner = serializers.BooleanField(read_only=True)
    
    product_info = ESP32ConfigSerializer(source='related_product', read_only=True)
    service_info = ServiceSerializer(source='related_service', read_only=True)
    course_info = VCCourseSerializer(source='related_course', read_only=True)

    class Meta:
        model = Topic
        fields = [
            'id', 'title', 'content', 'author', 'author_info', 
            'related_product', 'product_info', 
            'related_service', 'service_info',
            'related_course', 'course_info',
            'view_count', 'is_pinned', 'created_at', 'updated_at', 
            'is_verified_owner', 'replies', 'media'
        ]
        read_only_fields = ['view_count', 'created_at', 'updated_at', 'is_verified_owner']