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/*******************************************************************
 * © 2020 SAP SE or an SAP affiliate company. All rights reserved. *
 *******************************************************************/
package com.sap.cds.reflect.impl;

import static com.sap.cds.reflect.impl.CdsStructuredTypeBuilder.noSuchElement;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.stream.Stream;

import com.sap.cds.reflect.CdsAnnotation;
import com.sap.cds.reflect.CdsElement;
import com.sap.cds.reflect.CdsEvent;

public class CdsEventBuilder extends CdsDefinitionBuilder {

	private final List> elements = new ArrayList<>();

	public CdsEventBuilder(List> annotations, String qualifiedName) {
		super(annotations, qualifiedName);
	}

	void addElement(CdsElementBuilder e) {
		this.elements.add(e);
	}

	void addElements(List> elements) {
		elements.forEach(this::addElement);
	}

	@Override
	public CdsEvent build() {
		return new CdsEventImpl(annotations, qualifiedName, elements);
	}

	private static class CdsEventImpl extends CdsDefinitionImpl implements CdsEvent {

		private final Map elements = new HashMap<>();

		private CdsEventImpl(Collection> annotations, String qualifiedName,
				List> ebs) {
			super(annotations, qualifiedName);

			ebs.stream().filter(e -> !e.toBeIgnored(this.getQualifiedName() + "." + e.getName()))
					.forEach(eb -> this.elements.put(eb.getName(), eb.build(this)));
		}

		@Override
		public Stream elements() {
			return elements.values().stream();
		}

		@Override
		public Optional findElement(String name) {
			return Optional.ofNullable(elements.get(name));
		}

		@Override
		public CdsElement getElement(String name) {
			return findElement(name).orElseThrow(noSuchElement("element", name, this.getQualifiedName()));
		}

	}
}