/*
    * Copyright 2011 FatWire Corporation. All Rights Reserved.
    *
    * 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 com.fatwire.gst.foundation.include;
  
  import java.util.Set;
  
  import org.apache.commons.lang.StringUtils;
  import org.springframework.util.Assert;
  
  import COM.FutureTense.Interfaces.FTValList;
  import COM.FutureTense.Interfaces.ICS;
  
  import com.fatwire.assetapi.data.AssetId;
  import com.fatwire.gst.foundation.CSRuntimeException;
  import com.fatwire.gst.foundation.facade.runtag.render.CallTemplate.Style;
  import com.fatwire.gst.foundation.facade.runtag.satellite.Page;
  
  public class GsfCallTemplate {
      private String site;
      private String tname;
      private String assettype;
      private long assetid;
      private String packedargs;
      private Style style;
      private final FTValList arguments = new FTValList();
  
      public GsfCallTemplate argument(final String name, final String value) {
          arguments.setValString(name, value);
          return this;
      }
  
      public String include(final ICS ics, final FTValList vIn) {
          // required parameters
          Assert.hasText(site, "Site must not be blank.");
          Assert.hasText(tname, "Tname must not be blank.");
          Assert.hasText(assettype, "Assettype must not be blank.");
          if (assetid < 1) {
              throw new IllegalArgumentException("Assetid must be set.");
          }
  
          if (StringUtils.isNotBlank(packedargs)) {
              ics.decode(packedargs, arguments);
          }
  
          try {
              arguments.setValString("c", assettype);
              arguments.setValString("cid", Long.toString(assetid));
              final String rm = ics.GetVar("rendermode");
              if (rm != null) {
                  arguments.setValString("rendermode", rm);
              }
  
              String pagename;
              String elementname;
              if (tname.startsWith("/")) // typeless
              {
                  elementname = tname;
                  pagename = site + tname;
              } else {
                  elementname = assettype + "/" + tname;
                  pagename = site + "/" + assettype + "/" + tname;
              }
  
              ics.ClearErrno();
              switch (style) {
                  case element: {
                      ics.PushVars();
                      // pushvars copies current scope into new scope
                      // so remove vars that are undesireable
                      ics.RemoveVar("tid");
                      ics.RemoveVar("context");
                      final boolean ret = ics.CallElement(elementname, arguments);
                      ics.PopVars();
                      if (!ret) {
                          throw new CSRuntimeException("Calling element " + elementname + " failed",
                                  ics.getComplexError(), ics.GetErrno());
                      }
                      return null;
                  }
                  case embedded: {
                      ics.PushVars();
                      // pushvars copies current scope into new scope
                      // so remove vars that are undesireable
                      ics.RemoveVar("tid");
                      ics.RemoveVar("context");
                      final boolean ret = ics.InsertPage(pagename, arguments);
                     ics.PopVars();
                     if (!ret) {
                         throw new CSRuntimeException("Inserting page " + pagename + " failed", ics.getComplexError(),
                                 ics.GetErrno());
                     }
 
                     return null;
 
                 }
                 default: {
                     final Page p = new Page();
                     p.setPagename(pagename);
 
                     @SuppressWarnings("unchecked")
                     final Set<String> keys = arguments.keySet();
                     for (final String key : keys) {
                         p.set(key, arguments.getValString(key));
                     }
 
                     return p.execute(ics);
                 }
             }
         } finally {
             ics.ClearErrno();
         }
 
     }
 
     /**
      * @return the site
      */
     public String getSite() {
         return site;
     }
 
     /**
      * @param site the site to set
      */
     public void setSite(final String site) {
         this.site = site;
     }
 
     /**
      * @return the tname
      */
     public String getTname() {
         return tname;
     }
 
     /**
      * @param tname the tname to set
      */
     public void setTname(final String tname) {
         this.tname = tname;
     }
 
     /**
      * @return the assettype
      */
     public String getAssettype() {
         return assettype;
     }
 
     /**
      * @param assettype the assettype to set
      */
     public void setAssettype(final String assettype) {
         this.assettype = assettype;
     }
 
     /**
      * @return the assetid
      */
     public long getAssetid() {
         return assetid;
     }
 
     /**
      * @param assetid the assetid to set
      */
     public void setAssetid(final long assetid) {
         this.assetid = assetid;
     }
 
     /**
      * @param id the assetid to set
      */
     public void setAssetid(final AssetId id) {
         this.assetid = id.getId();
         this.assettype = id.getType();
     }
 
     /**
      * @return the packedargs
      */
     public String getPackedArgs() {
         return packedargs;
     }
 
     /**
      * @param packedargs the packedargs to set
      */
     public void setPackedArgs(final String packedargs) {
         this.packedargs = packedargs;
     }
 
     /**
      * @return the style
      */
     public Style getStyle() {
         return style;
     }
 
     /**
      * @param style the style to set
      */
     public void setStyle(final Style style) {
         this.style = style;
     }
 
 }