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 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.
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package org.apache.ofbiz.manufacturing.bom;

import java.util.Date;
import java.util.List;
import java.util.Map;

import org.apache.ofbiz.base.util.Debug;
import org.apache.ofbiz.base.util.UtilMisc;
import org.apache.ofbiz.base.util.UtilValidate;
import org.apache.ofbiz.entity.Delegator;
import org.apache.ofbiz.entity.GenericEntityException;
import org.apache.ofbiz.entity.GenericValue;
import org.apache.ofbiz.entity.util.EntityQuery;
import org.apache.ofbiz.service.GenericServiceException;
import org.apache.ofbiz.service.LocalDispatcher;
import org.apache.ofbiz.service.ServiceUtil;

/** Helper class containing static method useful when dealing
 * with product's bills of materials.
 * These methods are also available as services (see {@link BOMServices}).
 */
public final class BOMHelper {

    public static final String module = BOMHelper.class.getName();

    /** Creates a new instance of BOMHelper */
    private BOMHelper() {
    }

    /** Returns the product's low level code (llc) i.e. the maximum depth
     * in which the productId can be found in any of the
     * bills of materials of bomType type.
     * @return The low level code for the productId. (0 = root, 1 = first level, etc...)
     * @param productId The product id
     * @param bomType The bill of materials type (e.g. manufacturing, engineering,...)
     * @param delegator Validity date (if null, today is used).
     * @param inDate The delegator
     * @throws GenericEntityException If a db problem occurs.
     */
    /*
     * It's implemented as a recursive method that performs the following tasks:
     * 1.given a product id, it selects all the product's parents
     * 2.if no parents are found, the method returns zero (llc = 0, this is a root element)
     * 3.for every parent the method is called recursively, the llc returned is incremented by one and the max of these number is saved as maxDepth
     * 4.the maxDepth value is returned
     */
    public static int getMaxDepth(String productId, String bomType, Date inDate, Delegator delegator) throws GenericEntityException {
        // If the date is null, set it to today.
        if (inDate == null) inDate = new Date();
        int maxDepth = 0;
        List<GenericValue> productNodesList = EntityQuery.use(delegator).from("ProductAssoc")
                .where("productIdTo", productId, 
                        "productAssocTypeId", bomType)
                .cache().filterByDate(inDate).queryList();
        int depth = 0;
        for (GenericValue oneNode : productNodesList) {
            depth = 0;
            depth = getMaxDepth(oneNode.getString("productId"), bomType, inDate, delegator);
            depth++;
            if (depth > maxDepth) {
                maxDepth = depth;
            }
        }

        return maxDepth;
    }

    /** Returns the ProductAssoc generic value for a duplicate productIdKey
     * ancestor if present, null otherwise.
     * Useful to avoid loops when adding new assocs (components)
     * to a bill of materials.
     * @param productId The product to which we want to add a new child.
     * @param productIdKey The new component we want to add to the existing bom.
     * @param bomType The bill of materials type (e.g. manufacturing, engineering).
     * @param inDate Validity date (if null, today is used).
     *
     * @param delegator The delegator used
     * @throws GenericEntityException If a db problem occurs
     * @return the ProductAssoc generic value for a duplicate productIdKey
     * ancestor if present, null otherwise.
     */
    public static GenericValue searchDuplicatedAncestor(String productId, String productIdKey, String bomType, Date inDate, Delegator delegator, LocalDispatcher dispatcher, GenericValue userLogin) throws GenericEntityException {
        return searchDuplicatedAncestor(productId, productIdKey, null, bomType, inDate, delegator, dispatcher, userLogin);
    }

    private static GenericValue searchDuplicatedAncestor(String productId, String productIdKey, List<String> productIdKeys,
            String bomType, Date inDate, Delegator delegator, LocalDispatcher dispatcher, GenericValue userLogin) throws GenericEntityException {
        // If the date is null, set it to today.
        if (inDate == null) inDate = new Date();
        if (productIdKeys == null) {
            BOMTree tree = new BOMTree(productIdKey, bomType, inDate, delegator, dispatcher, userLogin);
            productIdKeys = tree.getAllProductsId();
            productIdKeys.add(productIdKey);
        }
        List<GenericValue> productNodesList = EntityQuery.use(delegator).from("ProductAssoc")
                .where("productIdTo", productId, 
                        "productAssocTypeId", bomType)
                .cache().filterByDate(inDate).queryList();
        GenericValue duplicatedNode = null;
        for (GenericValue oneNode : productNodesList) {
            for (int i = 0; i < productIdKeys.size(); i++) {
                if (oneNode.getString("productId").equals(productIdKeys.get(i))) {
                    return oneNode;
                }
            }
            duplicatedNode = searchDuplicatedAncestor(oneNode.getString("productId"), productIdKey, productIdKeys, bomType, inDate, delegator, dispatcher, userLogin);
            if (duplicatedNode != null) {
                break;
            }
        }
        return duplicatedNode;
    }

    public static String createProductionRunsForShipment(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) {
        Delegator delegator = (Delegator) request.getAttribute("delegator");
        LocalDispatcher dispatcher = (LocalDispatcher) request.getAttribute("dispatcher");
        GenericValue userLogin = (GenericValue)request.getSession().getAttribute("userLogin");

        String shipmentId = request.getParameter("shipmentId");

        try {
        List<GenericValue> shipmentPlans = EntityQuery.use(delegator).from("OrderShipment")
                .where("shipmentId", shipmentId).queryList();
        for (GenericValue shipmentPlan : shipmentPlans) {
            GenericValue orderItem = shipmentPlan.getRelatedOne("OrderItem", false);

            List<GenericValue> productionRuns = EntityQuery.use(delegator).from("WorkOrderItemFulfillment")
                    .where("orderId", shipmentPlan.get("orderId"),
                            "orderItemSeqId", shipmentPlan.get("orderItemSeqId"),
                            "shipGroupSeqId", shipmentPlan.get("shipGroupSeqId"))
                    .cache().queryList();
            if (UtilValidate.isNotEmpty(productionRuns)) {
                Debug.logError("Production Run for order item (" + orderItem.getString("orderId") + "/" + orderItem.getString("orderItemSeqId") + ") not created.", module);
                continue;
            }
            Map<String, Object> result = dispatcher.runSync("createProductionRunsForOrder", UtilMisc.<String, Object>toMap("quantity", shipmentPlan.getBigDecimal("quantity"), "orderId", 
                    shipmentPlan.getString("orderId"), "orderItemSeqId", shipmentPlan.getString("orderItemSeqId"), "shipGroupSeqId", shipmentPlan.getString("shipGroupSeqId"), "shipmentId", 
                    shipmentId, "userLogin", userLogin));
            if (ServiceUtil.isError(result)) {
                String errorMessage = ServiceUtil.getErrorMessage(result);
                request.setAttribute("_ERROR_MESSAGE_", errorMessage);
                Debug.logError(errorMessage, module);
                return "error";
            }
        }
        } catch (GenericEntityException|GenericServiceException ge) {
            Debug.logWarning(ge, module);
        } catch (Exception e) {
            // if there is an exception for either, the other probably wont work
            Debug.logWarning(e, module);
        }

        return "success";
    }

}
