<?xml version="1.0" encoding="UTF-8"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:element name="config">
        <xs:complexType>
            <xs:choice minOccurs="0" maxOccurs="unbounded">
                <xs:element name="topic" type="topicType">
                    <xs:unique name="uniqueHandlerName">
                        <xs:annotation>
                            <xs:documentation>
                                Handler name must be unique.
                            </xs:documentation>
                        </xs:annotation>
                        <xs:selector xpath="handler"/>
                        <xs:field xpath="@name"/>
                    </xs:unique>
                </xs:element>
            </xs:choice>
        </xs:complexType>
        <xs:unique name="topic-unique-name">
            <xs:annotation>
                <xs:documentation>
                    Topic name must be unique.
                </xs:documentation>
            </xs:annotation>
            <xs:selector xpath="topic"/>
            <xs:field xpath="@name"/>
        </xs:unique>
    </xs:element>
    <xs:complexType name="topicType">
        <xs:choice minOccurs="0" maxOccurs="unbounded">
            <xs:element name="handler" type="handlerType"/>
        </xs:choice>
        <xs:attribute type="xs:string" name="name" use="required"/>
        <xs:attribute type="schemaType" name="schema" use="optional"/>
        <xs:attribute type="xs:string" name="request" use="optional"/>
        <xs:attribute type="xs:string" name="response" use="optional"/>
        <xs:attribute type="xs:boolean" name="is_synchronous" use="optional"/>
    </xs:complexType>
    <xs:complexType name="handlerType">
        <xs:attribute type="xs:string" name="name" use="required"/>
        <xs:attribute type="serviceTypeType" name="type" use="required"/>
        <xs:attribute type="serviceMethodType" name="method" use="required"/>
        <xs:attribute type="xs:boolean" name="disabled" use="optional"/>
    </xs:complexType>
    <xs:simpleType name="schemaType">
        <xs:annotation>
            <xs:documentation>
                Service schema is expected in a format "Vendor\Module\Api\ServiceName::methodName".
            </xs:documentation>
        </xs:annotation>
        <xs:restriction base="xs:string">
            <xs:pattern value="[a-zA-Z]+[a-zA-Z0-9\\]+::[a-zA-Z0-9]+" />
            <xs:minLength value="5" />
        </xs:restriction>
    </xs:simpleType>
    <xs:simpleType name="serviceTypeType">
        <xs:annotation>
            <xs:documentation>
                Service class/interface name is expected in a format "Vendor\Module\Api\ServiceName".
            </xs:documentation>
        </xs:annotation>
        <xs:restriction base="xs:string">
            <xs:pattern value="[a-zA-Z]+[a-zA-Z0-9\\]+" />
            <xs:minLength value="4" />
        </xs:restriction>
    </xs:simpleType>
    <xs:simpleType name="serviceMethodType">
        <xs:annotation>
            <xs:documentation>
                Method name is expected in a format "someMethodName".
            </xs:documentation>
        </xs:annotation>
        <xs:restriction base="xs:string">
            <xs:pattern value="[a-zA-Z0-9]+" />
            <xs:minLength value="2" />
        </xs:restriction>
    </xs:simpleType>
</xs:schema>