/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.juneau.jsonschema.annotation;

import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.RetentionPolicy.*;

import java.lang.annotation.*;

import org.apache.juneau.*;
import org.apache.juneau.annotation.*;
import org.apache.juneau.collections.*;
import org.apache.juneau.json.*;
import org.apache.juneau.jsonschema.*;
import org.apache.juneau.parser.*;

/**
 * Annotation for specifying config properties defined in {@link JsonSchemaGenerator}.
 *
 * <p>
 * Used primarily for specifying bean configuration properties on REST classes and methods.
 *
 * <h5 class='section'>See Also:</h5><ul>
 *    <li class='link'><a class="doclink" href="https://juneau.apache.org/docs/topics/JsonSchemaDetails">JSON-Schema Support</a>
 * </ul>
 */
@Target({ TYPE, METHOD })
@Retention(RUNTIME)
@Inherited
@ContextApply(JsonSchemaConfigAnnotation.Apply.class)
public @interface JsonSchemaConfig {

   /**
    * Add descriptions to types.
    *
    * <p>
    * Identifies which categories of types that descriptions should be automatically added to generated schemas.
    *
    * <p>
    * The description is the result of calling {@link ClassMeta#getName()}.
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       The format is a comma-delimited list of any of the following values:
    *       <ul class='doctree'>
    *          <li><js>"BEAN"</js>
    *          <li><js>"COLLECTION"</js>
    *          <li><js>"ARRAY"</js>
    *          <li><js>"MAP"</js>
    *          <li><js>"STRING"</js>
    *          <li><js>"NUMBER"</js>
    *          <li><js>"BOOLEAN"</js>
    *          <li><js>"ANY"</js>
    *          <li><js>"OTHER"</js>
    *       </ul>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.jsonschema.JsonSchemaGenerator.Builder#addDescriptionsTo(TypeCategory...)}
    * </ul>
    *
    * @return The annotation value.
    */
   String addDescriptionsTo() default "";

   /**
    * Add examples.
    *
    * <p>
    * Identifies which categories of types that examples should be automatically added to generated schemas.
    * <p>
    * The examples come from calling {@link ClassMeta#getExample(BeanSession,JsonParserSession)} which in turn gets examples
    * from the following:
    * <ul class='javatree'>
    *    <li class='ja'>{@link Example}
    *    <li class='ja'>{@link Marshalled#example() Marshalled(example)}
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       The format is a comma-delimited list of any of the following values:
    *       <ul class='doctree'>
    *          <li><js>"BEAN"</js>
    *          <li><js>"COLLECTION"</js>
    *          <li><js>"ARRAY"</js>
    *          <li><js>"MAP"</js>
    *          <li><js>"STRING"</js>
    *          <li><js>"NUMBER"</js>
    *          <li><js>"BOOLEAN"</js>
    *          <li><js>"ANY"</js>
    *          <li><js>"OTHER"</js>
    *       </ul>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.jsonschema.JsonSchemaGenerator.Builder#addDescriptionsTo(TypeCategory...)}
    * </ul>
    *
    * @return The annotation value.
    */
   String addExamplesTo() default "";

   /**
    * Allow nested descriptions.
    *
    * <p>
    * Identifies whether nested descriptions are allowed in schema definitions.
    *
    * <ul class='values'>
    *    <li><js>"true"</js>
    *    <li><js>"false"</js> (default)
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.jsonschema.JsonSchemaGenerator.Builder#allowNestedDescriptions()}
    * </ul>
    *
    * @return The annotation value.
    */
   String allowNestedDescriptions() default "";

   /**
    * Allow nested examples.
    *
    * <p>
    * Identifies whether nested examples are allowed in schema definitions.
    *
    * <ul class='values'>
    *    <li><js>"true"</js>
    *    <li><js>"false"</js> (default)
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.jsonschema.JsonSchemaGenerator.Builder#allowNestedExamples()}
    * </ul>
    *
    * @return The annotation value.
    */
   String allowNestedExamples() default "";

   /**
    * Bean schema definition mapper.
    *
    * <p>
    * Interface to use for converting Bean classes to definition IDs and URIs.
    *
    * <p>
    * Used primarily for defining common definition sections for beans in Swagger JSON.
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       This setting is ignored if {@link org.apache.juneau.jsonschema.JsonSchemaGenerator.Builder#useBeanDefs()} is not enabled.
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.jsonschema.JsonSchemaGenerator.Builder#beanDefMapper(Class)}
    * </ul>
    *
    * @return The annotation value.
    */
   Class<? extends BeanDefMapper> beanDefMapper() default BeanDefMapper.Void.class;

   /**
    * Automatically detect POJO recursions.
    *
    * <p>
    * Specifies that recursions should be checked for during traversal.
    *
    * <p>
    * Recursions can occur when traversing models that aren't true trees but rather contain loops.
    * <br>In general, unchecked recursions cause stack-overflow-errors.
    * <br>These show up as {@link ParseException ParseExceptions} with the message <js>"Depth too deep.  Stack overflow occurred."</js>.
    *
    * <p>
    * The behavior when recursions are detected depends on the value for {@link org.apache.juneau.BeanTraverseContext.Builder#ignoreRecursions()}.
    *
    * <p>
    * For example, if a model contains the links A-&gt;B-&gt;C-&gt;A, then the JSON generated will look like
    *    the following when <jsf>BEANTRAVERSE_ignoreRecursions</jsf> is <jk>true</jk>...
    *
    * <p class='bjson'>
    *    {A:{B:{C:<jk>null</jk>}}}
    * </p>
    *
    * <ul class='values'>
    *    <li><js>"true"</js>
    *    <li><js>"false"</js> (default)
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='warn'>
    *       Checking for recursion can cause a small performance penalty.
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.BeanTraverseContext.Builder#detectRecursions()}
    * </ul>
    *
    * @return The annotation value.
    */
   String detectRecursions() default "";

   /**
    * Ignore recursion errors.
    *
    * <p>
    * Used in conjunction with {@link org.apache.juneau.BeanTraverseContext.Builder#detectRecursions()}.
    * <br>Setting is ignored if <jsf>BEANTRAVERSE_detectRecursions</jsf> is <js>"false"</js>.
    *
    * <p>
    * If <js>"true"</js>, when we encounter the same object when traversing a tree, we set the value to <jk>null</jk>.
    * <br>Otherwise, a {@link BeanRecursionException} is thrown with the message <js>"Recursion occurred, stack=..."</js>.
    *
    * <ul class='values'>
    *    <li><js>"true"</js>
    *    <li><js>"false"</js> (default)
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.BeanTraverseContext.Builder#ignoreRecursions()}
    * </ul>
    *
    * @return The annotation value.
    */
   String ignoreRecursions() default "";

   /**
    * Ignore types from schema definitions.
    *
    * <p>
    * Defines class name patterns that should be ignored when generating schema definitions in the generated
    * Swagger documentation.
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Format: Comma-delimited list of patterns
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.jsonschema.JsonSchemaGenerator.Builder#ignoreTypes(String...)}
    * </ul>
    *
    * @return The annotation value.
    */
   String ignoreTypes() default "";

   /**
    * Initial depth.
    *
    * <p>
    * The initial indentation level at the root.
    * <br>Useful when constructing document fragments that need to be indented at a certain level.
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Format: integer
    * <li class='note'>
    *       Default value: <js>"0"</js>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.BeanTraverseContext.Builder#initialDepth(int)}
    * </ul>
    *
    * @return The annotation value.
    */
   String initialDepth() default "";

   /**
    * Max traversal depth.
    *
    * <p>
    * Abort traversal if specified depth is reached in the POJO tree.
    * <br>If this depth is exceeded, an exception is thrown.
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Format: integer
    *    <li class='note'>
    *       Default value: <js>"100"</js>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.BeanTraverseContext.Builder#maxDepth(int)}
    * </ul>
    *
    * @return The annotation value.
    */
   String maxDepth() default "";

   /**
    * Optional rank for this config.
    *
    * <p>
    * Can be used to override default ordering and application of config annotations.
    *
    * @return The annotation value.
    */
   int rank() default 0;

   /**
    * Use bean definitions.
    *
    * <p>
    * When enabled, schemas on beans will be serialized as the following:
    * <p class='bjson'>
    *    {
    *       type: <js>'object'</js>,
    *       <js>'$ref'</js>: <js>'#/definitions/TypeId'</js>
    *    }
    * </p>
    *
    * <p>
    * The definitions can then be retrieved from the session using {@link JsonSchemaGeneratorSession#getBeanDefs()}.
    *
    * <p>
    * Definitions can also be added programmatically using {@link JsonSchemaGeneratorSession#addBeanDef(String, JsonMap)}.
    *
    * <ul class='values'>
    *    <li><js>"true"</js>
    *    <li><js>"false"</js> (default)
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.jsonschema.JsonSchemaGenerator.Builder#useBeanDefs()}
    * </ul>
    *
    * @return The annotation value.
    */
   String useBeanDefs() default "";
}