/*
 * Progress.java
 *
 * Copyright (c) 2007  Vreixo Formoso
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * See COPYING file for details.
 */

package org.pykix.libburnia.libburn;

import org.pykix.libburnia.bindings.Proxy;

/**
 * Operation progress report. All values are 0 based indices.
 * 
 * @author Vreixo Formoso
 * @since 0.1
 */
/*
 * I've implemented this as a proxy, because I think is a good option given
 * the normal usage of this object. The 3 considered options are:
 * - One option is implement this as a pure Java option, created in JNI
 *   with a copy of the C struct and returned back to Java. This involves
 *   creation of a object each time the progress is retrieved, so it's not
 *   a good option.
 * - Implement this as a proxy. C code can pass directly the proxied C struct
 *   so is a fast operation. The problem is that consult of Progress values
 *   involves a JNI call.
 * - Another option, maybe better, is treat this as a Java option whose fields
 *   are updated from JNI code.
 * For now, the proxy options seems a good enought approach.
 */
public class Progress extends Proxy {

	/**
	 * Create a new Progress object.
	 * 
	 * <p>
	 * This can be used with {@link Drive#getDriveStatus(Progress)} to
	 * get the progress of a burn operation.
	 */
	public Progress() {
		super( burn_progress_new() );
	}
	
	/** Get the total number of sessions. */
	public int getSessions() {
		return burn_progress_sessions( pointerOf(this) );
	}
	
	/** Get current session. */
	public int getSession() {
		return burn_progress_session( pointerOf(this) );
	}
	
	/** Get the total number of tracks. */
	public int getTracks() {
		return burn_progress_tracks( pointerOf(this) );
	}
	
	/** Get current track. */
	public int getTrack() {
		return burn_progress_track( pointerOf(this) );
	}
	
	/** Get the total number of indices. */
	public int getIndices() {
		return burn_progress_indices( pointerOf(this) );
	}
	
	/** Get current index. */
	public int getIndex() {
		return burn_progress_index( pointerOf(this) );
	}
	
	/** Get the starting logical block address. */
	public int getStartSector() {
		return burn_progress_start_sector( pointerOf(this) );
	}
	
	/** 
	 * On write: The number of sectors.
	 * On blank: 0x10000 as upper limit for relative progress steps. 
	 */
	public int getSectors() {
		return burn_progress_sectors( pointerOf(this) );
	}
	
	/** 
	 * On write: The current sector being processed.
	 * On blank: Relative progress steps 0 to 0x10000. 
	 */
	public int getSector() {
		return burn_progress_sector( pointerOf(this) );
	}
	
	/** 
	 * Get the capacity of the drive buffer. 
	 */
	public int getBufferCapacity() {
		return burn_progress_buffer_capacity( pointerOf(this) );
	}
	
	/** 
	 * Get the free space in the drive buffer (might be slightly outdated). 
	 */
	public int getBufferAvailable() {
		return burn_progress_buffer_available( pointerOf(this) );
	}

	/** Get the number of bytes sent to the drive buffer. */
	public long getBufferedBytes() {
		return burn_progress_buffered_bytes( pointerOf(this) );
	}
	
	/** 
	 * The minimum number of buffered bytes. (Caution: Before surely
	 * one buffer size of bytes was processed, this value is <code>-1</code>.)
	 */
	public int getBufferMinFill() {
		return burn_progress_buffer_min_fill( pointerOf(this) );
	}
	
	@Override
	protected void finalize() throws Throwable {
		super.finalize();
		burn_progress_free( pointerOf(this) );
	}
	
	private static native long burn_progress_new();
	
	private static native void burn_progress_free(long p);
	
	private static native int burn_progress_sessions(long p);
	
	private static native int burn_progress_session(long p);
	
	private static native int burn_progress_tracks(long p);
	
	private static native int burn_progress_track(long p);
	
	private static native int burn_progress_indices(long p);
	
	private static native int burn_progress_index(long p);
	
	private static native int burn_progress_start_sector(long p);
	
	private static native int burn_progress_sectors(long p);
	
	private static native int burn_progress_sector(long p);
	
	private static native int burn_progress_buffer_capacity(long p);
	
	private static native int burn_progress_buffer_available(long p);
	
	private static native long burn_progress_buffered_bytes(long p);
	
	private static native int burn_progress_buffer_min_fill(long p);
	
}