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/*
 * Copyright (c) 2024 Eclipse Dirigible contributors
 *
 * All rights reserved. This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v2.0 which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v20.html
 *
 * SPDX-FileCopyrightText: Eclipse Dirigible contributors SPDX-License-Identifier: EPL-2.0
 */
package org.eclipse.dirigible.components.odata.service;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.util.List;
import org.apache.olingo.odata2.api.exception.ODataException;
import org.eclipse.dirigible.components.odata.domain.ODataContainer;
import org.eclipse.dirigible.components.odata.domain.ODataSchema;
import org.springframework.stereotype.Service;

/**
 * The Class ODataMetadataService.
 */
@Service
public class ODataMetadataService {


    /** The odata schema service. */
    private final ODataSchemaService odataSchemaService;

    /** The odata container service. */
    private final ODataContainerService odataContainerService;

    /**
     * Instantiates a new o data metadata service.
     *
     * @param odataSchemaService the odata schema service
     * @param odataContainerService the odata container service
     */
    ODataMetadataService(ODataSchemaService odataSchemaService, ODataContainerService odataContainerService) {
        this.odataSchemaService = odataSchemaService;
        this.odataContainerService = odataContainerService;
    }

    /**
     * Gets the metadata.
     *
     * @return the metadata
     * @throws ODataException the o data exception
     */
    public InputStream getMetadata() throws ODataException {
        StringBuilder builder = new StringBuilder();
        builder.append("\n");
        builder.append(
                "\n");
        builder.append(
                "    \n");

        List schemas = odataSchemaService.getAll();
        for (ODataSchema schema : schemas) {
            builder.append(new String(schema.getContent()));
            builder.append("\n");
        }

        builder.append("\n");
        builder.append("    \n");
        List containers = odataContainerService.getAll();
        for (ODataContainer container : containers) {
            builder.append(new String(container.getContent()));
            builder.append("\n");
        }
        builder.append("    \n");
        builder.append("\n");

        builder.append("    \n");
        builder.append("\n");

        return new ByteArrayInputStream(builder.toString()
                                               .getBytes());
    }

}