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package com.github.kzwang.osem.jackson;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.ser.BeanPropertyWriter;
import com.fasterxml.jackson.databind.ser.impl.PropertySerializerMap;
import com.github.kzwang.osem.annotations.IndexableComponent;
import com.github.kzwang.osem.annotations.IndexableProperties;
import com.github.kzwang.osem.annotations.IndexableProperty;


/**
 * Override to use custom serializer for null value
 */
public class OsemBeanPropertyWriter extends BeanPropertyWriter {

    protected OsemBeanPropertyWriter(BeanPropertyWriter base) {
        super(base);
    }

    @Override
    public void serializeAsField(Object bean, JsonGenerator jgen, SerializerProvider prov) throws Exception {
        Object value = get(bean);
        // Null handling is bit different, check that first
        if (value == null) {
            if (_nullSerializer != null) {
                jgen.writeFieldName(_name);
                // check has custom serializer first
                IndexableProperty indexableProperty = _member.getAnnotation(IndexableProperty.class);
                IndexableComponent indexableComponent = _member.getAnnotation(IndexableComponent.class);
                IndexableProperties indexableProperties = _member.getAnnotation(IndexableProperties.class);
                if (indexableProperty != null && indexableProperty.serializer() != JsonSerializer.class) {
                    JsonSerializer serializer = indexableProperty.serializer().newInstance();
                    serializer.serialize(null, jgen, prov);
                } else if (indexableComponent != null && indexableComponent.serializer() != JsonSerializer.class) {
                    JsonSerializer serializer = indexableComponent.serializer().newInstance();
                    serializer.serialize(null, jgen, prov);
                } else if (indexableProperties != null && indexableProperties.serializer() != JsonSerializer.class) {
                    JsonSerializer serializer = indexableProperties.serializer().newInstance();
                    serializer.serialize(null, jgen, prov);
                } else {
                    _nullSerializer.serialize(null, jgen, prov);
                }

            }
            return;
        }
        // then find serializer to use
        JsonSerializer