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/*
 * Copyright © 2016-2017 European Support Limited
 *
 * Licensed 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.openecomp.core.validation.types;

import java.io.InputStream;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import java.util.function.BiPredicate;
import java.util.stream.Collectors;
import org.apache.commons.collections4.CollectionUtils;
import org.openecomp.core.validation.ErrorMessageCode;
import org.openecomp.sdc.datatypes.error.ErrorLevel;
import org.openecomp.sdc.logging.api.Logger;
import org.openecomp.sdc.logging.api.LoggerFactory;

public class GlobalValidationContext {

    private static final Logger LOGGER = LoggerFactory.getLogger(GlobalValidationContext.class);
    private final Map<String, FileValidationContext> fileContextMap = new HashMap<>();
    private final Map<String, MessageContainer> messageContainerMap = new HashMap<>();
    private ErrorMessageCode messageCode;

    public ErrorMessageCode getMessageCode() {
        return messageCode;
    }

    public void setMessageCode(ErrorMessageCode messageCode) {
        this.messageCode = messageCode;
    }

    /**
     * Add message.
     *
     * @param fileName the file name
     * @param level    the level
     * @param message  the message
     */
    public void addMessage(String fileName, ErrorLevel level, String message) {
        LOGGER.debug("'{}' [{}] in file '{}' ", message, level, fileName);
        if (fileContextMap.containsKey(fileName)) {
            fileContextMap.get(fileName).getMessageContainer().getMessageBuilder().setMessage(level.toString() + ": " + message).setLevel(level)
                .create();
        } else {
            MessageContainer messageContainer;
            synchronized (this) {
                messageContainer = messageContainerMap.computeIfAbsent(fileName, k -> new MessageContainer());
            }
            messageContainer.getMessageBuilder().setMessage(level.toString() + ": " + message).setLevel(level).create();
        }
    }

    /**
     * Gets file content.
     *
     * @param fileName the file name
     * @return the file content
     */
    public Optional<InputStream> getFileContent(String fileName) {
        FileValidationContext fileContext = fileContextMap.get(fileName);
        if (fileContext == null || fileContext.isEmpty()) {
            return Optional.empty();
        }
        return Optional.of(fileContext.getContent());
    }

    public void addFileContext(String fileName, byte[] fileContent) {
        fileContextMap.put(fileName, new FileValidationContext(fileName, fileContent));
    }

    /**
     * Gets context message containers.
     *
     * @return the context message containers
     */
    public Map<String, MessageContainer> getContextMessageContainers() {
        Map<String, MessageContainer> contextMessageContainer = new HashMap<>();
        fileContextMap.entrySet().stream().filter(entry -> CollectionUtils.isNotEmpty(entry.getValue().getMessageContainer().getErrorMessageList()))
            .forEach(entry -> contextMessageContainer.put(entry.getKey(), entry.getValue().getMessageContainer()));
        messageContainerMap.entrySet().stream().filter(entry -> CollectionUtils.isNotEmpty(entry.getValue().getErrorMessageList()))
            .forEach(entry -> contextMessageContainer.put(entry.getKey(), entry.getValue()));
        return contextMessageContainer;
    }

    public Map<String, FileValidationContext> getFileContextMap() {
        return fileContextMap;
    }

    public Collection<String> files(BiPredicate<String, GlobalValidationContext> func) {
        return fileContextMap.keySet().stream().filter(t -> func.test(t, this)).collect(Collectors.toList());
    }

    public Collection<String> getFiles() {
        return this.getFileContextMap().keySet();
    }
}