<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns="http://javaops.ru"
           xmlns:xs="http://www.w3.org/2001/XMLSchema"
           targetNamespace="http://javaops.ru" elementFormDefault="qualified">

    <xs:element name="UsersWithMeals">
        <xs:complexType>
            <xs:all>
                <xs:element name="Users">
                    <xs:complexType>
                        <xs:sequence minOccurs="0" maxOccurs="unbounded">
                            <xs:element ref="User"/>
                        </xs:sequence>
                    </xs:complexType>
                </xs:element>
            </xs:all>
        </xs:complexType>
    </xs:element>

    <xs:element name="User">
        <xs:complexType>
            <xs:sequence>
                <xs:element ref="Meals" minOccurs="0"/>
            </xs:sequence>
            <xs:attribute type="xs:string" name="name" use="required"/>
            <xs:attribute type="xs:string" name="email" use="required"/>
            <xs:attribute type="xs:string" name="password" use="required"/>
            <xs:attribute type="xs:int" name="caloriesPerDay" use="required"/>
            <xs:attribute type="xs:dateTime" name="registered" use="required"/>
            <xs:attribute type="xs:boolean" name="enabled" use="required"/>
            <xs:attribute type="roles" name="roles"/>
        </xs:complexType>
    </xs:element>

    <xs:simpleType name="roles">
        <xs:list itemType="roleTypes"/>
    </xs:simpleType>

    <xs:simpleType name="roleTypes">
        <xs:restriction base="xs:string">
            <xs:enumeration value="admin"/>
            <xs:enumeration value="user"/>
        </xs:restriction>
    </xs:simpleType>

    <xs:element name="Meals">
        <xs:complexType>
            <xs:sequence minOccurs="0" maxOccurs="unbounded">
                <xs:element ref="Meal"/>
            </xs:sequence>
        </xs:complexType>
    </xs:element>

    <xs:element name="Meal">
        <xs:complexType>
            <xs:simpleContent>
                <xs:extension base="xs:string">
                    <xs:attribute type="xs:int" name="calories" use="required"/>
                    <xs:attribute type="xs:dateTime" name="dateTime" use="required"/>
                    <xs:attribute type="xs:boolean" name="excess"/>
                </xs:extension>
            </xs:simpleContent>
        </xs:complexType>
    </xs:element>
</xs:schema>