package org.greenstone.gsdl3.gs3build.metadata;

/**
 *  A class to hold all the alternative file structures
 *  for a particular METS Document
 */

import java.util.Map;
import java.util.HashMap;
import java.util.Iterator;

import java.io.File;
import java.io.PrintWriter;
import java.net.URL;

import org.greenstone.gsdl3.gs3build.doctypes.DocumentInterface;

import org.greenstone.gsdl3.gs3build.database.*;
import org.greenstone.gsdl3.gs3build.util.GS3SQLConnection;

public class METSFileSet
{ Map fileGroups;

  public METSFileSet()
  { this.fileGroups = new HashMap();
    this.fileGroups.put("default", new METSFileGroup("default"));
  }

  public METSFileGroup getGroup(String name)
  { if (!this.fileGroups.containsKey(name))
    { return null;
    }
    return (METSFileGroup) this.fileGroups.get(name);
  }

  public METSFile getFile(int index)
  { METSFileGroup group = this.getGroup("default");

    if (group == null)
    { return null;
    }
    return group.getFile(0);
  }

  public void addFile(METSFile file)
  { METSFileGroup defaultGroup = (METSFileGroup) this.fileGroups.get("default");
    defaultGroup.addFile(file);
  }

  public METSFile addFile(URL url)
  { METSFile file = METSFile.makeMETSFile(url);
    this.addFile(file);
    return file;
  }

  public void addFile(METSFile file, String toGroup)
  { METSFileGroup destGroup = (METSFileGroup) this.fileGroups.get(toGroup);

    if (destGroup == null)
    { destGroup = new METSFileGroup(toGroup);
      this.fileGroups.put(destGroup.getName(), destGroup);
    }
		
    destGroup.addFile(file);
  }

  public void addFile(URL url, String toGroup)
  { METSFile file = METSFile.makeMETSFile(url);
    this.addFile(file, toGroup);
  }

  public void addGroup(METSFileGroup group)
  { this.fileGroups.put(group.getName(), group);
  }

  public void write(PrintWriter writer)
  { Iterator groups = this.fileGroups.values().iterator();

    writer.println("<mets:fileSec>");
    while (groups.hasNext())
    { METSFileGroup group = (METSFileGroup) groups.next();

      group.write(writer);
    }
    writer.println("</mets:fileSec>");
  }

  public void writeSQL(DocumentInterface document, GS3SQLConnection connection)
  { Iterator groups = this.fileGroups.values().iterator();

    GS3SQLInsert insert = new GS3SQLInsert("filesection");
    insert.addValue("DocID", document.getID().toString());
    insert.addValue("FileSecID", "test"); // TODO: remove magic string

    connection.execute(insert.toString());
    
    while (groups.hasNext())
    { METSFileGroup group = (METSFileGroup) groups.next();

      group.writeSQL(document, connection);
    }
  }
}