from rest_framework import serializers
from .models import Users, AcademicProfile, ResearchGroup, GroupMembership


class UsersGetSerializer(serializers.ModelSerializer):
   
    roles = serializers.SerializerMethodField()
    introduction = serializers.SerializerMethodField()
    avatar_url = serializers.SerializerMethodField()
    class Meta:
        model = Users
        fields = ['user_id','name', 'roles','avatar_url', 'introduction','create_time', 'update_time','email', 'phone', 'address']

    def get_roles(self, obj):

        # return obj.roles.all()
        return ['admin']

    def get_introduction(self, obj):
        return 'I am a super administrator'
    
    def get_avatar_url(self, obj):
        if obj.avatar:
            # 返回绝对URL
            request = self.context.get('request')
            return request.build_absolute_uri(obj.avatar.url) 
        return None
    
class UsersPostSerializer(serializers.ModelSerializer):
    class Meta:
        model = Users
        fields = ['name', 'email', 'phone', 'address']



class AcademicProfileGetSerializer(serializers.ModelSerializer):
    user = UsersGetSerializer(read_only=True)
    class Meta:
        model = AcademicProfile
        fields = ['user', 'degree', 'department', 'university', 'advisor', 'thesis_title', 'thesis_abstract', 'thesis_keywords']