/*
 * Copyright 2016-present Open Networking Laboratory
 *
 * 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.onosproject.yangutils.translator.tojava.utils;

import java.util.List;

import org.onosproject.yangutils.datamodel.YangNode;
import org.onosproject.yangutils.translator.tojava.JavaQualifiedTypeInfo;
import org.onosproject.yangutils.translator.tojava.TempJavaCodeFragmentFiles;
import org.onosproject.yangutils.translator.tojava.TempJavaCodeFragmentFilesContainer;
import org.onosproject.yangutils.translator.tojava.TempJavaFragmentFiles;
import org.onosproject.yangutils.utils.io.impl.YangPluginConfig;

import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getEnumJavaAttribute;
import static org.onosproject.yangutils.utils.UtilConstants.ACTIVATE_ANNOTATION_IMPORT;
import static org.onosproject.yangutils.utils.UtilConstants.CLOSE_CURLY_BRACKET;
import static org.onosproject.yangutils.utils.UtilConstants.CLOSE_PARENTHESIS;
import static org.onosproject.yangutils.utils.UtilConstants.COMMA;
import static org.onosproject.yangutils.utils.UtilConstants.COMPONENT_ANNOTATION;
import static org.onosproject.yangutils.utils.UtilConstants.COMPONENT_ANNOTATION_IMPORT;
import static org.onosproject.yangutils.utils.UtilConstants.DEACTIVATE_ANNOTATION_IMPORT;
import static org.onosproject.yangutils.utils.UtilConstants.DIAMOND_CLOSE_BRACKET;
import static org.onosproject.yangutils.utils.UtilConstants.DIAMOND_OPEN_BRACKET;
import static org.onosproject.yangutils.utils.UtilConstants.ENUM;
import static org.onosproject.yangutils.utils.UtilConstants.EQUAL;
import static org.onosproject.yangutils.utils.UtilConstants.FOUR_SPACE_INDENTATION;
import static org.onosproject.yangutils.utils.UtilConstants.IMMEDIATE;
import static org.onosproject.yangutils.utils.UtilConstants.IMPORT;
import static org.onosproject.yangutils.utils.UtilConstants.INT;
import static org.onosproject.yangutils.utils.UtilConstants.LIST;
import static org.onosproject.yangutils.utils.UtilConstants.LISTENER_SERVICE;
import static org.onosproject.yangutils.utils.UtilConstants.LOGGER_FACTORY_IMPORT;
import static org.onosproject.yangutils.utils.UtilConstants.LOGGER_IMPORT;
import static org.onosproject.yangutils.utils.UtilConstants.NEW_LINE;
import static org.onosproject.yangutils.utils.UtilConstants.OPEN_CURLY_BRACKET;
import static org.onosproject.yangutils.utils.UtilConstants.OPEN_PARENTHESIS;
import static org.onosproject.yangutils.utils.UtilConstants.PERIOD;
import static org.onosproject.yangutils.utils.UtilConstants.PRIVATE;
import static org.onosproject.yangutils.utils.UtilConstants.PUBLIC;
import static org.onosproject.yangutils.utils.UtilConstants.SEMI_COLAN;
import static org.onosproject.yangutils.utils.UtilConstants.SERVICE_ANNOTATION;
import static org.onosproject.yangutils.utils.UtilConstants.SERVICE_ANNOTATION_IMPORT;
import static org.onosproject.yangutils.utils.UtilConstants.SPACE;
import static org.onosproject.yangutils.utils.UtilConstants.TRUE;
import static org.onosproject.yangutils.utils.UtilConstants.TYPE;
import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.ENUM_ATTRIBUTE;
import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.getJavaDoc;
import static org.onosproject.yangutils.utils.io.impl.YangIoUtils.getSmallCase;
import static java.util.Collections.sort;

/**
 * Represents utility class to generate the java snippet.
 */
public final class JavaCodeSnippetGen {

    /**
     * Creates an instance of java code snippet gen.
     */
    private JavaCodeSnippetGen() {
    }

    /**
     * Returns the java file header comment.
     *
     * @return the java file header comment
     */
    public static String getFileHeaderComment() {

        /**
         * TODO return the file header.
         */
        return null;
    }

    /**
     * Returns the textual java code information corresponding to the import list.
     *
     * @param importInfo import info
     * @return the textual java code information corresponding to the import
     * list
     */
    public static String getImportText(JavaQualifiedTypeInfo importInfo) {
        return IMPORT + importInfo.getPkgInfo() + PERIOD + importInfo.getClassInfo() + SEMI_COLAN + NEW_LINE;
    }

    /**
     * Returns the textual java code for attribute definition in class.
     *
     * @param javaAttributeTypePkg Package of the attribute type
     * @param javaAttributeType    java attribute type
     * @param javaAttributeName    name of the attribute
     * @param isList               is list attribute
     * @return the textual java code for attribute definition in class
     */
    public static String getJavaAttributeDefination(String javaAttributeTypePkg, String javaAttributeType,
                                                    String javaAttributeName, boolean isList) {

        String attributeDefination = PRIVATE + SPACE;

        if (!isList) {
            if (javaAttributeTypePkg != null) {
                attributeDefination = attributeDefination + javaAttributeTypePkg + PERIOD;
            }

            attributeDefination = attributeDefination + javaAttributeType + SPACE + javaAttributeName + SEMI_COLAN
                    + NEW_LINE;
        } else {
            attributeDefination = attributeDefination + LIST + DIAMOND_OPEN_BRACKET;
            if (javaAttributeTypePkg != null) {
                attributeDefination = attributeDefination + javaAttributeTypePkg + PERIOD;
            }

            attributeDefination = attributeDefination + javaAttributeType + DIAMOND_CLOSE_BRACKET + SPACE
                    + javaAttributeName + SEMI_COLAN + NEW_LINE;
        }
        return attributeDefination;
    }

    /**
     * Returns list attribute string.
     *
     * @param type attribute type
     * @return list attribute string
     */
    public static String getListAttribute(String type) {
        return LIST + DIAMOND_OPEN_BRACKET + type + DIAMOND_CLOSE_BRACKET;
    }

    /**
     * Returns based on the file type and the YANG name of the file, generate the class
     * / interface definition close.
     *
     * @return corresponding textual java code information
     */
    public static String getJavaClassDefClose() {
        return CLOSE_CURLY_BRACKET;
    }

    /**
     * Returns string for enum's attribute.
     *
     * @param name         name of attribute
     * @param value        value of the enum
     * @param pluginConfig plugin configurations
     * @return string for enum's attribute
     */
    public static String generateEnumAttributeString(String name, int value, YangPluginConfig pluginConfig) {
        return getJavaDoc(ENUM_ATTRIBUTE, name, false, pluginConfig) + FOUR_SPACE_INDENTATION
                + getEnumJavaAttribute(name).toUpperCase() + OPEN_PARENTHESIS
                + value + CLOSE_PARENTHESIS + COMMA + NEW_LINE;
    }

    /**
     * Adds annotations imports.
     *
     * @param imports   list if imports
     * @param operation to add or to delete
     */
    public static void addAnnotationsImports(List<String> imports, boolean operation) {
        if (operation) {
            imports.add(ACTIVATE_ANNOTATION_IMPORT);
            imports.add(DEACTIVATE_ANNOTATION_IMPORT);
            imports.add(COMPONENT_ANNOTATION_IMPORT);
            imports.add(SERVICE_ANNOTATION_IMPORT);
            imports.add(LOGGER_FACTORY_IMPORT);
            imports.add(LOGGER_IMPORT);
        } else {
            imports.remove(ACTIVATE_ANNOTATION_IMPORT);
            imports.remove(DEACTIVATE_ANNOTATION_IMPORT);
            imports.remove(COMPONENT_ANNOTATION_IMPORT);
            imports.remove(SERVICE_ANNOTATION_IMPORT);
            imports.remove(LOGGER_FACTORY_IMPORT);
            imports.remove(LOGGER_IMPORT);
        }
        sortImports(imports);
    }

    /**
     * Returns sorted import list.
     *
     * @param imports import list
     * @return sorted import list
     */
    public static List<String> sortImports(List<String> imports) {
        sort(imports);
        return imports;
    }

    /**
     * Returns event enum start.
     *
     * @return event enum start
     */
    public static String getEventEnumTypeStart() {
        return FOUR_SPACE_INDENTATION + PUBLIC + SPACE + ENUM + SPACE + TYPE + SPACE + OPEN_CURLY_BRACKET
                + NEW_LINE;
    }

    /**
     * Adds listener's imports.
     *
     * @param curNode   currentYangNode.
     * @param imports   import list
     * @param operation add or remove
     * @param classInfo class info to be added to import list
     */
    public static void addListenersImport(YangNode curNode, List<String> imports, boolean operation,
                                          String classInfo) {
        String thisImport = "";
        if (classInfo.equals(LISTENER_SERVICE)) {
            thisImport = getTempJavaFragment(curNode).getJavaImportData().getListenerServiceImport();
            performOperationOnImports(imports, thisImport, operation);
        } else {
            thisImport = getTempJavaFragment(curNode).getJavaImportData().getListenerRegistryImport();
            performOperationOnImports(imports, thisImport, operation);
        }
    }

    /**
     * Performs given operations on import list.
     *
     * @param imports   list of imports
     * @param curImport current import
     * @param operation add or remove
     * @return import list
     */
    private static List<String> performOperationOnImports(List<String> imports, String curImport,
                                                          boolean operation) {
        if (operation) {
            imports.add(curImport);
        } else {
            imports.remove(curImport);
        }
        sortImports(imports);
        return imports;
    }

    /**
     * Returns temp java fragment.
     *
     * @param curNode current YANG node
     * @return temp java fragments
     */
    public static TempJavaFragmentFiles getTempJavaFragment(YangNode curNode) {
        TempJavaCodeFragmentFiles container = ((TempJavaCodeFragmentFilesContainer) curNode)
                .getTempJavaCodeFragmentFiles();
        if (container.getBeanTempFiles() != null) {
            return container.getBeanTempFiles();
        }
        if (container.getServiceTempFiles() != null) {
            return container.getServiceTempFiles();
        }

        return null;
    }

    /**
     * Returns integer attribute for enum's class to get the values.
     *
     * @param className enum's class name
     * @return enum's attribute
     */
    public static String getEnumsValueAttribute(String className) {
        return NEW_LINE + FOUR_SPACE_INDENTATION + PRIVATE + SPACE + INT + SPACE + getSmallCase(className)
                + SEMI_COLAN + NEW_LINE;
    }

    /**
     * Returns component string.
     *
     * @return component string
     */
    public static String addComponentString() {
        return NEW_LINE + COMPONENT_ANNOTATION + SPACE + OPEN_PARENTHESIS + IMMEDIATE + SPACE
                + EQUAL + SPACE + TRUE + CLOSE_PARENTHESIS + NEW_LINE + SERVICE_ANNOTATION;
    }
}