/**
 * Copyright (c) 2017, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * WSO2 Inc. licenses this file to you 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.
 */
define(['lodash', 'log', 'event_channel', './abstract-source-gen-visitor', './connector-action-visitor',
        './variable-declaration-visitor', './connector-declaration-visitor', './statement-visitor-factory'],
    function(_, log, EventChannel, AbstractSourceGenVisitor, ConnectorActionVisitor,
             VariableDeclarationVisitor, ConnectorDeclarationVisitor, StatementVisitorFactory) {

        /**
         * @param {ASTVisitor} parent - parent visitor
         * @constructor
         */
        var ConnectorDefinitionVisitor = function (parent) {
            AbstractSourceGenVisitor.call(this, parent);
        };

        ConnectorDefinitionVisitor.prototype = Object.create(AbstractSourceGenVisitor.prototype);
        ConnectorDefinitionVisitor.prototype.constructor = ConnectorDefinitionVisitor;

        ConnectorDefinitionVisitor.prototype.canVisitConnectorDefinition = function(connectorDefinition){
            return true;
        };

        /**
         * Begin the visit and generate the source
         * @param {ConnectorDefinition} connectorDefinition - Connector Definition
         */
        ConnectorDefinitionVisitor.prototype.beginVisitConnectorDefinition = function(connectorDefinition){
            /**
             * set the configuration start for the connector definition language construct
             * If we need to add additional parameters which are dynamically added to the configuration start
             * that particular source generation has to be constructed here
             */
            var self = this;
            var argumentsSrc = "";
            _.forEach(connectorDefinition.getAnnotations(), function(annotation) {
                if (!_.isEmpty(annotation.value)) {
                    var constructedPathAnnotation;
                    if (annotation.key.indexOf(":") === -1) {
                        constructedPathAnnotation = '@' + annotation.key + '("' + annotation.value + '")\n';
                    } else {
                        constructedPathAnnotation = '@' + annotation.key.split(":")[0] + '(' + annotation.key.split(":")[1] +
                            ' = "' + annotation.value + '")\n';
                    }
                    self.appendSource(constructedPathAnnotation);
                }
            });

            _.forEach(connectorDefinition.getArguments(), function(argument, index){
                argumentsSrc += argument.type + " ";
                argumentsSrc += argument.identifier;
                if (connectorDefinition.getArguments().length - 1 != index) {
                    argumentsSrc += ", ";
                }
            });

            var constructedSourceSegment = 'connector ' + connectorDefinition.getConnectorName() +
                ' (' + argumentsSrc + ')' + ' {\n';
            this.appendSource(constructedSourceSegment);
            log.debug('Begin Visit Connector Definition');
        };

        ConnectorDefinitionVisitor.prototype.visitConnectorDefinition = function(connectorDefinition){
            log.debug('Visit Connector Definition');
        };

        /**
         * End visiting the connector definition
         * @param {ConnectorDefinition} connectorDefinition - Connector Definition
         */
        ConnectorDefinitionVisitor.prototype.endVisitConnectorDefinition = function(connectorDefinition){
            this.appendSource("}\n");
            this.getParent().appendSource(this.getGeneratedSource());
            log.debug('End Visit Connector Definition');
        };

        /**
         * Visit Connector Action
         * @param {ConnectorAction} connectorAction
         */
        ConnectorDefinitionVisitor.prototype.visitConnectorAction = function(connectorAction){
            var connectorActionVisitor = new ConnectorActionVisitor(this);
            connectorAction.accept(connectorActionVisitor);
        };

        /**
         * Visit Connector Declaration
         * @param {ConnectorDeclaration} connectorDeclaration
         */
        ConnectorDefinitionVisitor.prototype.visitConnectorDeclaration = function(connectorDeclaration){
            var connectorDeclarationVisitor = new ConnectorDeclarationVisitor(this);
            connectorDeclaration.accept(connectorDeclarationVisitor);
        };

        /**
         * Visit Variable Declaration
         * @param {VariableDeclaration} variableDeclaration
         */
        ConnectorDefinitionVisitor.prototype.visitVariableDeclaration = function(variableDeclaration){
            var variableDeclarationVisitor = new VariableDeclarationVisitor(this);
            variableDeclaration.accept(variableDeclarationVisitor);
        };

        /**
         * Visit Statements
         * @param {Statement} statement
         */
        ConnectorDefinitionVisitor.prototype.visitStatement = function (statement) {
            var statementVisitorFactory = new StatementVisitorFactory();
            var statementVisitor = statementVisitorFactory.getStatementVisitor(statement, this);
            statement.accept(statementVisitor);
        };

        return ConnectorDefinitionVisitor;
    });