package de.mpg.mpiwg.berlin.mpdl.escidoc;

import java.util.ArrayList;
import java.util.Date;

import de.mpg.mpiwg.berlin.mpdl.util.XmlUtil;

public class Item {
  private String id;
  private String contextId;  // e.g. "/ir/context/escidoc:23002" 
  private String contentModelId;  
  private String pid;
  private MetadataRecord mdRecord;
  private ArrayList<Component> components;
  private Date lastModificationDate;
  
  public Item(String id, Date lastModificationDate) {
    this.id = id;
    this.lastModificationDate = lastModificationDate;
  }

  public Item(String contextId, String pid, MetadataRecord mdRecord, String contentModelId, ArrayList<Component> components) {
    this.contextId = contextId;
    this.pid = pid;
    this.mdRecord = mdRecord;
    this.contentModelId = contentModelId;
    this.components = components;
  }

  public void addComponent(Component component) {
    if (components == null)
      components = new ArrayList<Component>();
    components.add(component);
  }
  
  public String getId() {
    return id;
  }
  
  public Date getLastModificationDate() {
    return lastModificationDate;  
  }
  
  public void setLastModificationDate(Date lastModificationDate) {
    this.lastModificationDate = lastModificationDate;
  }
  
  public String toXmlString() {
    StringBuilder str = new StringBuilder();
    str.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
    str.append("<escidocItem:item\n");
    str.append("  xmlns:escidocItem=\"http://www.escidoc.de/schemas/item/0.9\"\n");
    str.append("  xmlns:escidocMetadataRecords=\"http://www.escidoc.de/schemas/metadatarecords/0.5\"\n");
    str.append("  xmlns:escidocComponents=\"http://www.escidoc.de/schemas/components/0.9\"\n");
    str.append("  xmlns:prop=\"http://escidoc.de/core/01/properties/\"\n");
    str.append("  xmlns:srel=\"http://escidoc.de/core/01/structural-relations/\"\n");
    str.append("  xmlns:xlink=\"http://www.w3.org/1999/xlink\"\n");
    str.append("  xmlns:mpiwg=\"http://www.mpiwg-berlin.mpg.de/ns/mpiwg\"\n");
    str.append("  xmlns:xml=\"http://www.w3.org/XML/1998/namespace\"");
    if (lastModificationDate != null) {
      XmlUtil xmlUtil = XmlUtil.getInstance();
      String xsDateStr = xmlUtil.toXsDate(lastModificationDate);
      str.append("  last-modification-date=\"" + xsDateStr + "\"");
    }
    str.append(">\n");
    str.append("  <escidocItem:properties>\n");
    str.append("    <srel:context xlink:href=\"" + contextId + "\"/>\n");
    str.append("    <srel:content-model xlink:href=\"" + contentModelId + "\"/>\n");
    if (pid != null) {
      str.append("    <prop:pid>" + pid + "</prop:pid>\n");
    }
    str.append("    <prop:content-model-specific>\n");
    str.append("      <my-content-model-value-structure />\n");
    str.append("    </prop:content-model-specific>\n");
    str.append("  </escidocItem:properties>\n");

    str.append("  <!-- A Container could have multiple meta data records. -->\n");
    str.append("  <escidocMetadataRecords:md-records>\n");
    str.append("    <escidocMetadataRecords:md-record name=\"escidoc\">\n");
    if (mdRecord != null) {
      str.append(mdRecord.toXmlString());
    } else {
      str.append("      <metadata xmlns:dc=\"http://purl.org/dc/elements/1.1/\">\n");
      str.append("      </metadata>\n");
    }
    str.append("    </escidocMetadataRecords:md-record>\n");
        
    str.append("  </escidocMetadataRecords:md-records>\n");

    if (components != null) {
      str.append("  <escidocComponents:components>\n");
      for (int i=0; i<components.size(); i++) {
        Component component = components.get(i);
        str.append(component.toXmlString());
      }
      str.append("  </escidocComponents:components>\n");
    }
    
    str.append("</escidocItem:item>\n");
    return str.toString();
  }

}