/*
    * Copyright 2007 The Kuali Foundation
    * 
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    * 
   * 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.kuali.ole.module.purap.service.impl;
  
  import org.apache.commons.lang.StringUtils;
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.kuali.ole.module.purap.PurapConstants;
  import org.kuali.ole.module.purap.document.ContractManagerAssignmentDocument;
  import org.kuali.ole.module.purap.exception.PurapConfigurationException;
  import org.kuali.ole.module.purap.service.ImageService;
  import org.kuali.ole.sys.OLEConstants;
  import org.kuali.ole.sys.service.impl.OleParameterConstants;
  import org.kuali.rice.core.api.config.property.ConfigurationService;
  import org.kuali.rice.coreservice.framework.parameter.ParameterService;
  
  import java.text.DecimalFormat;
  import java.text.NumberFormat;
  
  /**
   * Implementation of ImageService.
   */
  public class ImageServiceImpl implements ImageService {
      private static Log LOG = LogFactory.getLog(ImageServiceImpl.class);
  
      private ConfigurationService configurationService;
      private ParameterService parameterService;
  
      public void setParameterService(ParameterService parameterService) {
          this.parameterService = parameterService;
      }
  
      public void setConfigurationService(ConfigurationService configurationService) {
          this.configurationService = configurationService;
      }
  
      /**
       * @see org.kuali.ole.module.purap.dataaccess.ImageDao#getPurchasingDirectorImage(java.lang.String, java.lang.String, java.lang.String)
       */
      public String getPurchasingDirectorImage(String key, String campusCode, String location) {
          LOG.debug("getPurchasingDirectorImage() started");
  
          String prefix = parameterService.getParameterValueAsString(OleParameterConstants.PURCHASING_DOCUMENT.class, PurapConstants.PURCHASING_DIRECTOR_IMAGE_PREFIX);
          String extension = "." + parameterService.getParameterValueAsString(OleParameterConstants.PURCHASING_DOCUMENT.class, PurapConstants.PURCHASING_DIRECTOR_IMAGE_EXTENSION);
          return getFile(prefix, campusCode, key, extension, location);
      }
  
      /**
       * @see org.kuali.ole.module.purap.dataaccess.ImageDao#getContractManagerImage(java.lang.String, java.lang.Integer, java.lang.String)
       */
      public String getContractManagerImage(String key, Integer contractManagerId, String location) {
          LOG.debug("getContractManagerImage() started");
  
          NumberFormat formatter = new DecimalFormat("00");
          String cm = formatter.format(contractManagerId);
  
          String prefix = parameterService.getParameterValueAsString(ContractManagerAssignmentDocument.class, PurapConstants.CONTRACT_MANAGER_IMAGE_PREFIX);
          String extension = "." + parameterService.getParameterValueAsString(ContractManagerAssignmentDocument.class, PurapConstants.CONTRACT_MANAGER_IMAGE_EXTENSION);
          return getFile(prefix, cm, key, extension, location);
      }
  
      /**
       * @see org.kuali.ole.module.purap.dataaccess.ImageDao#getLogo(java.lang.String, java.lang.String, java.lang.String)
       */
      public String getLogo(String key, String campusCode, String location) {
          if (LOG.isDebugEnabled()) {
              LOG.debug("getLogo() started. key is " + key + ". campusCode is " + campusCode);
          }
  
          String prefix = parameterService.getParameterValueAsString(OleParameterConstants.PURCHASING_DOCUMENT.class, PurapConstants.LOGO_IMAGE_PREFIX);
          String extension = "." + parameterService.getParameterValueAsString(OleParameterConstants.PURCHASING_DOCUMENT.class, PurapConstants.LOGO_IMAGE_EXTENSION);
          return getFile(prefix, campusCode, key, extension, location);
      }
  
      /**
       * Copy a file from a web location to the local system.
       *
       * @param prefix   - Prefix for the file name
       * @param fileKey  - File key for file
       * @param key      - Unique key for the file
       * @param location - location of file
       * @return - location to copied file
       */
      protected String getFile(String prefix, String fileKey, String key, String extension, String location) {
          LOG.debug("getFile() started");
  
         // try retrieving file URL from parameter
         String urlpath = parameterService.getParameterValueAsString(OleParameterConstants.PURCHASING_DOCUMENT.class, PurapConstants.PDF_IMAGE_LOCATION_URL);
         // if parameter value is empty, then try retrieving it from property
         if (StringUtils.isEmpty(urlpath)) {
             urlpath = configurationService.getPropertyValueAsString(OLEConstants.EXTERNALIZABLE_IMAGES_URL_KEY);
         }
 
         if (urlpath == null) {
             throw new PurapConfigurationException("Application Setting " + OLEConstants.EXTERNALIZABLE_IMAGES_URL_KEY + " is missing");
         }
         if (location == null) {
             throw new PurapConfigurationException("Valid location to store temp image files was null");
         }
 
         String completeUrl = urlpath + prefix + "_" + fileKey.toLowerCase() + extension;
         if (LOG.isDebugEnabled()) {
             LOG.debug("getFile() URL = " + completeUrl);
         }
         return completeUrl;
     }
 
 }