/**
 * Copyright (c) 2012 Partners In Health.  All rights reserved.
 * The use and distribution terms for this software are covered by the
 * Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
 * which can be found in the file epl-v10.html at the root of this distribution.
 * By using this software in any fashion, you are agreeing to be bound by
 * the terms of this license.
 * You must not remove this notice, or any other, from this software.
 **/
package org.pih.warehouse.fulfillment

import org.pih.warehouse.core.Person
import org.pih.warehouse.requisition.Requisition

class FulfillmentService {

    boolean transactional = true


    /**
     * Adds a fulfillment item to a fulfillment object and saves the parent.
     * @param fulfillment
     * @param fulfillmentItem
     */
    void addToFulfillmentItems(Fulfillment fulfillment, FulfillmentItem fulfillmentItem) {

        log.info("Request: " + fulfillment.request)

        fulfillment.addToFulfillmentItems(fulfillmentItem)
        fulfillment.save()
    }


    /**
     * Returns fulfillment command object with a
     * @param id
     * @param fulfilledById
     * @return
     */
    FulfillmentCommand getFulfillment(String id, String fulfilledById) {
        def command = new FulfillmentCommand()

        // Make sure that the request we are trying to fulfill actually exists
        def requestInstance = Requisition.get(id)
        if (!requestInstance)
            throw new Exception("Unable to proceed with fulfillment without a valid request ")

        // Populate the command object with the
        command.request = requestInstance

        log.info("Request: " + requestInstance)
        log.info("Fulfillment: " + requestInstance.fulfillment)

        def fulfillment
        // Use existing fulfillment object
        if (requestInstance?.fulfillment) {
            fulfillment = requestInstance?.fulfillment
        }
        // Create a new fulfillment object
        else {
            fulfillment = new Fulfillment()
            fulfillment.status = FulfillmentStatus.NOT_FULFILLED
            fulfillment.dateFulfilled = new Date()
            fulfillment.fulfilledBy = Person.get(fulfilledById)
            fulfillment.request = requestInstance

            // Need to set the other side of the relationship as well
            requestInstance.fulfillment = fulfillment
        }
        command.fulfillment = fulfillment

        return command
    }
}