using System;
using System.Collections.Generic;
using Server;
using Server.Targeting;
using Server.Items;

namespace Server.SkillHandlers
{
	public class Inscribe
	{
		public static void Initialize()
		{
			SkillInfo.Table[(int)SkillName.Inscribe].Callback = new SkillUseCallback( OnUse );
		}

		public static TimeSpan OnUse( Mobile m )
		{
			Target target = new InternalTargetSrc();
			m.Target = target;
			m.SendLocalizedMessage( 1046295 ); // Target the book you wish to copy.
			target.BeginTimeout( m, TimeSpan.FromMinutes( 1.0 ) );

			return TimeSpan.FromSeconds( 1.0 );
		}

		private static Dictionary<BaseBook, Mobile> m_UseTable = new Dictionary<BaseBook, Mobile>();

		private static void SetUser( BaseBook book, Mobile mob )
		{
			m_UseTable[book] = mob;
		}

		private static void CancelUser( BaseBook book )
		{
			m_UseTable.Remove( book );
		}

		public static Mobile GetUser( BaseBook book )
		{
			Mobile m = null;
			m_UseTable.TryGetValue(book, out m);
			return m;
		}

		public static bool IsEmpty( BaseBook book )
		{
			foreach ( BookPageInfo page in book.Pages )
			{
				foreach ( string line in page.Lines )
				{
					if ( line.Trim().Length != 0 )
						return false;
				}
			}
			return true;
		}

		public static void Copy( BaseBook bookSrc, BaseBook bookDst )
		{
			bookDst.Title = bookSrc.Title;
			bookDst.Author = bookSrc.Author;

			BookPageInfo[] pagesSrc = bookSrc.Pages;
			BookPageInfo[] pagesDst = bookDst.Pages;
			for ( int i = 0; i < pagesSrc.Length && i < pagesDst.Length; i++ )
			{
				BookPageInfo pageSrc = pagesSrc[i];
				BookPageInfo pageDst = pagesDst[i];

				int length = pageSrc.Lines.Length;
				pageDst.Lines = new string[length];

				for ( int j = 0; j < length; j++ )
					pageDst.Lines[j] = pageSrc.Lines[j];
			}
		}

		private class InternalTargetSrc : Target
		{
			public InternalTargetSrc() :  base ( 3, false, TargetFlags.None )
			{
			}

			protected override void OnTarget( Mobile from, object targeted )
			{
				BaseBook book = targeted as BaseBook;
				if ( book == null )
					from.SendLocalizedMessage( 1046296 ); // That is not a book
				else if ( Inscribe.IsEmpty( book ) )
					from.SendLocalizedMessage( 501611 ); // Can't copy an empty book.
				else if ( Inscribe.GetUser( book ) != null )
					from.SendLocalizedMessage( 501621 ); // Someone else is inscribing that item.
				else
				{
					Target target = new InternalTargetDst( book );
					from.Target = target;
					from.SendLocalizedMessage( 501612 ); // Select a book to copy this to.
					target.BeginTimeout( from, TimeSpan.FromMinutes( 1.0 ) );
					Inscribe.SetUser( book, from );
				}
			}

			protected override void OnTargetCancel( Mobile from, TargetCancelType cancelType )
			{
				if ( cancelType == TargetCancelType.Timeout )
					from.SendLocalizedMessage( 501619 ); // You have waited too long to make your inscribe selection, your inscription attempt has timed out.
			}
		}

		private class InternalTargetDst : Target
		{
			private BaseBook m_BookSrc;

			public InternalTargetDst( BaseBook bookSrc ) : base ( 3, false, TargetFlags.None )
			{
				m_BookSrc = bookSrc;
			}

			protected override void OnTarget( Mobile from, object targeted )
			{
				if ( m_BookSrc.Deleted )
					return;

				BaseBook bookDst = targeted as BaseBook;

				if ( bookDst == null )
					from.SendLocalizedMessage( 1046296 ); // That is not a book
				else if ( Inscribe.IsEmpty( m_BookSrc ) )
					from.SendLocalizedMessage( 501611 ); // Can't copy an empty book.
				else if ( bookDst == m_BookSrc )
					from.SendLocalizedMessage( 501616 ); // Cannot copy a book onto itself.
				else if ( !bookDst.Writable )
					from.SendLocalizedMessage( 501614 ); // Cannot write into that book.
				else if ( Inscribe.GetUser( bookDst ) != null )
					from.SendLocalizedMessage( 501621 ); // Someone else is inscribing that item.
				else
				{
					if ( from.CheckTargetSkill( SkillName.Inscribe, bookDst, 0, 50 ) )
					{
						Inscribe.Copy( m_BookSrc, bookDst );

						from.SendLocalizedMessage( 501618 ); // You make a copy of the book.
						from.PlaySound( 0x249 );
					}
					else
					{
						from.SendLocalizedMessage( 501617 ); // You fail to make a copy of the book.
					}
				}
			}

			protected override void OnTargetCancel( Mobile from, TargetCancelType cancelType )
			{
				if ( cancelType == TargetCancelType.Timeout )
					from.SendLocalizedMessage( 501619 ); // You have waited too long to make your inscribe selection, your inscription attempt has timed out.
			}

			protected override void OnTargetFinish( Mobile from )
			{
				Inscribe.CancelUser( m_BookSrc );
			}
		}
	}
}