using System;
using Server;
using Server.Targeting;

namespace Server
{
public delegate void BoundingBoxCallback( Mobile from, Map map, Point3D start, Point3D end, object state );

public class BoundingBoxPicker
{
public static void Begin( Mobile from, BoundingBoxCallback callback, object state )
{
from.SendMessage( "Target the first location of the bounding box." );
from.Target = new PickTarget( callback, state );
}

private class PickTarget : Target
{
private Point3D m_Store;
private bool m_First;
private Map m_Map;
private BoundingBoxCallback m_Callback;
private object m_State;

public PickTarget( BoundingBoxCallback callback, object state ) : this( Point3D.Zero, true, null, callback, state )
{
}

public PickTarget( Point3D store, bool first, Map map, BoundingBoxCallback callback, object state ) : base( -1, true, TargetFlags.None )
{
m_Store = store;
m_First = first;
m_Map = map;
m_Callback = callback;
m_State = state;
}

protected override void OnTarget( Mobile from, object targeted )
{
IPoint3D p = targeted as IPoint3D;

if ( p == null )
return;
else if ( p is Item )
p = ((Item)p).GetWorldTop();

if ( m_First )
{
from.SendMessage( "Target another location to complete the bounding box." );
from.Target = new PickTarget( new Point3D( p ), false, from.Map, m_Callback, m_State );
}
else if ( from.Map != m_Map )
{
from.SendMessage( "Both locations must reside on the same map." );
}
else if ( m_Map != null && m_Map != Map.Internal && m_Callback != null )
{
Point3D start = m_Store;
Point3D end = new Point3D( p );

Utility.FixPoints( ref start, ref end );

m_Callback( from, m_Map, start, end, m_State );
}
}
}
}
}