package org.openslx.taskmanager.tasks;

import java.util.ArrayList;
import java.util.List;

import org.openslx.satserver.util.Exec;
import org.openslx.satserver.util.Util;
import org.openslx.satserver.util.Exec.ExecCallback;
import org.openslx.taskmanager.api.SystemCommandTask;

import com.google.gson.annotations.Expose;

public class IpxeVersion extends SystemCommandTask
{

	/* FOR COMMIT PICKING
	 * git log --pretty=format:"%H %at" --first-parent a58276abdd..openslx
	 */

	@Expose
	private Action action;

	@Expose
	private String ref;

	private Status status = new Status();

	@Override
	protected String[] initCommandLine()
	{
		List<String> args = new ArrayList<>();
		args.add( "git" );
		args.add( "-C" );
		args.add( "/opt/openslx/ipxe" );
		switch ( action ) {
		case CHECKOUT:
			args.add( "checkout" );
			args.add( ref );
			break;
		case LIST:
			EC vec = new EC();
			Exec.syncAt( 1, vec, "/", "gcc", "-dumpversion" );
			String start;
			if ( vec.version >= 10 ) {
				// Versions before this commit won't build with gcc 10
				start = "a098f40893";
			} else {
				start = "a58276abdd";
			}
			args.add( "log" );
			args.add( "--pretty=format:%H %at" );
			args.add( "--first-parent" );
			args.add( start + "..origin/openslx" );
			status.versions = new ArrayList<Version>();
			break;
		case FETCH:
			args.add( "fetch" );
			break;
		case RESET:
			args.add( "reset" );
			args.add( "--hard" );
			break;
		}
		return args.toArray( new String[ args.size() ] );
	}

	@Override
	protected boolean processEnded( int exitCode )
	{
		if ( exitCode != 0 && status.error == null ) {
			status.error = "Exit code: " + exitCode;
		}
		return exitCode == 0;
	}

	@Override
	protected void processStdOut( String line )
	{
		if ( action == Action.LIST ) {
			String[] parts = line.split( " " );
			if ( parts.length == 2 && parts[0].length() == 40 && parts[1].length() == 10 ) {
				long d = Util.parseLong( parts[1], 0 );
				if ( d != 0 ) {
					status.versions.add( new Version( parts[0], d ) );
				}
			}
		} else {
			processStdErr( line );
		}
	}

	@Override
	protected void processStdErr( String line )
	{
		if ( status.error == null ) {
			status.error = line;
		} else {
			status.error += "\n" + line;
		}
	}

	@Override
	protected boolean initTask()
	{
		setStatusObject( status );
		if ( action == null || ( action == Action.CHECKOUT && ref == null ) ) {
			status.error = "action or commit is null";
			return false;
		}
		status.ref = ref;
		return true;
	}

	static class EC implements ExecCallback
	{

		public int version = 0;

		@Override
		public void processStdOut( String line )
		{
			if ( line.matches( "[0-9].*" ) ) {
				version = Util.parseInt( line.replaceAll( "[^0-9].*$", "" ), 0 );
			}
		}

		@Override
		public void processStdErr( String line )
		{
		}

	}

	static enum Action
	{
		FETCH, RESET, CHECKOUT, LIST;
	}

	static class Version
	{
		public String hash;
		public long date;

		public Version( String hash, long date )
		{
			this.date = date;
			this.hash = hash;
		}
	}

	static class Status
	{
		public String error;
		public List<Version> versions;
		public String ref;
	}

}