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package org.apache.juneau.dto.swagger;

import static org.apache.juneau.internal.StringUtils.*;
import static org.apache.juneau.internal.ObjectUtils.*;

import java.net.*;
import java.net.URI;
import java.util.*;

import org.apache.juneau.*;
import org.apache.juneau.annotation.*;
import org.apache.juneau.internal.*;
import org.apache.juneau.utils.*;

/**
 * Allows referencing an external resource for extended documentation.
 *
 * <h5 class='section'>Example:</h5>
 * <p class='bcode w800'>
 * 	<jc>// Construct using SwaggerBuilder.</jc>
 * 	ExternalDocumentation x = <jsm>externalDocumentation</jsm>(<js>"https://swagger.io"</js>, <js>"Find more info here"</js>);
 *
 * 	<jc>// Serialize using JsonSerializer.</jc>
 * 	String json = JsonSerializer.<jsf>DEFAULT</jsf>.toString(x);
 *
 * 	<jc>// Or just use toString() which does the same as above.</jc>
 * 	String json = x.toString();
 * </p>
 * <p class='bcode w800'>
 * 	<jc>// Output</jc>
 * 	{
 * 		<js>"description"</js>: <js>"Find more info here"</js>,
 * 		<js>"url"</js>: <js>"https://swagger.io"</js>
 * 	}
 * </p>
 *
 * <ul class='seealso'>
 * 	<li class='link'>{@doc juneau-dto.Swagger}
 * </ul>
 */
@Bean(bpi="description,url,*")
public class ExternalDocumentation extends SwaggerElement {

	private String description;
	private URI url;

	/**
	 * Default constructor.
	 */
	public ExternalDocumentation() {}

	/**
	 * Copy constructor.
	 *
	 * @param copyFrom The object to copy.
	 */
	public ExternalDocumentation(ExternalDocumentation copyFrom) {
		super(copyFrom);

		this.description = copyFrom.description;
		this.url = copyFrom.url;
	}

	/**
	 * Make a deep copy of this object.
	 *
	 * @return A deep copy of this object.
	 */
	public ExternalDocumentation copy() {
		return new ExternalDocumentation(this);
	}

	/**
	 * Bean property getter:  <property>description</property>.
	 *
	 * <p>
	 * A short description of the target documentation.
	 *
	 * @return The property value, or <jk>null</jk> if it is not set.
	 */
	public String getDescription() {
		return description;
	}

	/**
	 * Bean property setter:  <property>description</property>.
	 *
	 * <p>
	 * A short description of the target documentation.
	 *
	 * @param value
	 * 	The new value for this property.
	 * 	<br>{@doc GFM} can be used for rich text representation.
	 * 	<br>Can be <jk>null</jk> to unset the property.
	 * @return This object (for method chaining).
	 */
	public ExternalDocumentation setDescription(String value) {
		description = value;
		return this;
	}

	/**
	 * Same as {@link #setDescription(String)}.
	 *
	 * @param value
	 * 	The new value for this property.
	 * 	<br>Non-String values will be converted to String using <c>toString()</c>.
	 * 	<br>Can be <jk>null</jk> to unset the property.
	 * @return This object (for method chaining).
	 */
	public ExternalDocumentation description(Object value) {
		return setDescription(stringify(value));
	}

	/**
	 * Bean property getter:  <property>url</property>.
	 *
	 * <p>
	 * The URL for the target documentation.
	 *
	 * @return The property value, or <jk>null</jk> if it is not set.
	 */
	public URI getUrl() {
		return url;
	}

	/**
	 * Bean property setter:  <property>url</property>.
	 *
	 * <p>
	 * The URL for the target documentation.
	 *
	 * @param value
	 * 	The new value for this property.
	 * 	<br>Property value is required.
	 * 	<br>URIs defined by {@link UriResolver} can be used for values.
	 * @return This object (for method chaining).
	 */
	public ExternalDocumentation setUrl(URI value) {
		url = value;
		return this;
	}

	/**
	 * Same as {@link #setUrl(URI)}.
	 *
	 * @param value
	 * 	The new value for this property.
	 * 	<br>URIs defined by {@link UriResolver} can be used for values.
	 * 	<br>Valid types:
	 * 	<ul>
	 * 		<li>{@link URI}
	 * 		<li>{@link URL}
	 * 		<li>{@link String}
	 * 			<br>Converted to URI using <code><jk>new</jk> URI(value.toString())</code>.
	 * 		<li>
	 * 	</ul>
	 * 	<br>Can be <jk>null</jk> to unset the property.
	 * @return This object (for method chaining).
	 */
	public ExternalDocumentation url(Object value) {
		return setUrl(StringUtils.toURI(value));
	}

	/**
	 * Returns <jk>true</jk> if the url property is not null.
	 *
	 * @return <jk>true</jk> if the url property is not null.
	 */
	public boolean hasUrl() {
		return url != null;
	}

	/**
	 * Returns <jk>true</jk> if the description property is not null or empty.
	 *
	 * @return <jk>true</jk> if the description property is not null or empty.
	 */
	public boolean hasDescription() {
		return isNotEmpty(description);
	}

	@Override /* SwaggerElement */
	public <T> T get(String property, Class<T> type) {
		if (property == null)
			return null;
		switch (property) {
			case "description": return toType(getDescription(), type);
			case "url": return toType(getUrl(), type);
			default: return super.get(property, type);
		}
	}

	@Override /* SwaggerElement */
	public ExternalDocumentation set(String property, Object value) {
		if (property == null)
			return this;
		switch (property) {
			case "description": return description(value);
			case "url": return url(value);
			default:
				super.set(property, value);
				return this;
		}
	}

	@Override /* SwaggerElement */
	public Set<String> keySet() {
		ASet<String> s = new ASet<String>()
			.appendIf(description != null, "description")
			.appendIf(url != null, "url");
		return new MultiSet<>(s, super.keySet());
	}
}