using System;
using Server;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Reflection;
using Server.Gumps;
using Server.Network;
using Server.Commands;
using Server.Commands.Generic;
using CommandInfo=Server.Commands.Docs.DocCommandEntry;
using CommandInfoSorter=Server.Commands.Docs.CommandEntrySorter;

namespace Server.Commands
{
public class HelpInfo
{

private static Dictionary<string, CommandInfo> m_HelpInfos = new Dictionary<string, CommandInfo>();
private static List<CommandInfo> m_SortedHelpInfo = new List<CommandInfo>(); //No need for SortedList cause it's only sorted once at creation...

public static Dictionary<string, CommandInfo> HelpInfos{ get { return m_HelpInfos; } }
public static List<CommandInfo> SortedHelpInfo { get { return m_SortedHelpInfo; } }

[CallPriority( 100 )]
public static void Initialize()
{
CommandSystem.Register( "HelpInfo", AccessLevel.Player, new CommandEventHandler( HelpInfo_OnCommand ) );

FillTable();
}

[Usage( "HelpInfo [<command>]" )]
[Description( "Gives information on a specified command, or when no argument specified, displays a gump containing all commands" )]
private static void HelpInfo_OnCommand( CommandEventArgs e )
{
if( e.Length > 0 )
{
string arg = e.GetString( 0 ).ToLower();
CommandInfo c;

if( m_HelpInfos.TryGetValue( arg, out c ) )
{
Mobile m = e.Mobile;

if( m.AccessLevel >= c.AccessLevel )
m.SendGump( new CommandInfoGump( c ) );
else
m.SendMessage( "You don't have access to that command." );

return;
}
else
e.Mobile.SendMessage( String.Format( "Command '{0}' not found!", arg ) );
}

e.Mobile.SendGump( new CommandListGump( 0, e.Mobile, null ) );

}

public static void FillTable()
{
List<CommandEntry> commands = new List<CommandEntry>( CommandSystem.Entries.Values );
List<CommandInfo> list = new List<CommandInfo>();

commands.Sort();
commands.Reverse();
Docs.Clean( commands );

for( int i = 0; i < commands.Count; ++i )
{
CommandEntry e =commands[i];

MethodInfo mi = e.Handler.Method;

object[] attrs = mi.GetCustomAttributes( typeof( UsageAttribute ), false );

if( attrs.Length == 0 )
continue;

UsageAttribute usage = attrs[0] as UsageAttribute;

attrs = mi.GetCustomAttributes( typeof( DescriptionAttribute ), false );

if( attrs.Length == 0 )
continue;

DescriptionAttribute desc = attrs[0] as DescriptionAttribute;

if( usage == null || desc == null )
continue;

attrs = mi.GetCustomAttributes( typeof( AliasesAttribute ), false );

AliasesAttribute aliases = (attrs.Length == 0 ? null : attrs[0] as AliasesAttribute);

string descString = desc.Description.Replace( "<", "(" ).Replace( ">", ")" );

if( aliases == null )
list.Add( new CommandInfo( e.AccessLevel, e.Command, null, usage.Usage, descString ) );
else
{
list.Add( new CommandInfo( e.AccessLevel, e.Command, aliases.Aliases, usage.Usage, descString ) );

for( int j = 0; j < aliases.Aliases.Length; j++ )
{
string[] newAliases = new string[aliases.Aliases.Length];

aliases.Aliases.CopyTo( newAliases, 0 );

newAliases[j] = e.Command;

list.Add( new CommandInfo( e.AccessLevel, aliases.Aliases[j], newAliases, usage.Usage, descString ) );
}
}
}


for( int i = 0; i < TargetCommands.AllCommands.Count; ++i )
{
BaseCommand command = TargetCommands.AllCommands[i];

string usage = command.Usage;
string desc = command.Description;

if( usage == null || desc == null )
continue;

string[] cmds = command.Commands;
string cmd = cmds[0];
string[] aliases = new string[cmds.Length - 1];

for( int j = 0; j < aliases.Length; ++j )
aliases[j] = cmds[j + 1];

desc = desc.Replace( "<", "(" ).Replace( ">", ")" );

if( command.Supports != CommandSupport.Single )
{
StringBuilder sb = new StringBuilder( 50 + desc.Length );

sb.Append( "Modifiers: " );

if( (command.Supports & CommandSupport.Global) != 0 )
sb.Append( "<i><Global</i>, " );

if( (command.Supports & CommandSupport.Online) != 0 )
sb.Append( "<i>Online</i>, " );

if( (command.Supports & CommandSupport.Region) != 0 )
sb.Append( "<i>Region</i>, " );

if( (command.Supports & CommandSupport.Contained) != 0 )
sb.Append( "<i>Contained</i>, " );

if( (command.Supports & CommandSupport.Multi) != 0 )
sb.Append( "<i>Multi</i>, " );

if( (command.Supports & CommandSupport.Area) != 0 )
sb.Append( "<i>Area</i>, " );

if( (command.Supports & CommandSupport.Self) != 0 )
sb.Append( "<i>Self</i>, " );

sb.Remove( sb.Length - 2, 2 );
sb.Append( "<br>" );
sb.Append( desc );

desc = sb.ToString();
}

list.Add( new CommandInfo( command.AccessLevel, cmd, aliases, usage, desc ) );

for( int j = 0; j < aliases.Length; j++ )
{
string[] newAliases = new string[aliases.Length];

aliases.CopyTo( newAliases, 0 );

newAliases[j] = cmd;

list.Add( new CommandInfo( command.AccessLevel, aliases[j], newAliases, usage, desc ) );
}
}

List<BaseCommandImplementor> commandImpls = BaseCommandImplementor.Implementors;

for( int i = 0; i < commandImpls.Count; ++i )
{
BaseCommandImplementor command = commandImpls[i];

string usage = command.Usage;
string desc = command.Description;

if( usage == null || desc == null )
continue;

string[] cmds = command.Accessors;
string cmd = cmds[0];
string[] aliases = new string[cmds.Length - 1];

for( int j = 0; j < aliases.Length; ++j )
aliases[j] = cmds[j + 1];

desc = desc.Replace( "<", ")" ).Replace( ">", ")" );

list.Add( new CommandInfo( command.AccessLevel, cmd, aliases, usage, desc ) );

for( int j = 0; j < aliases.Length; j++ )
{
string[] newAliases = new string[aliases.Length];

aliases.CopyTo( newAliases, 0 );

newAliases[j] = cmd;

list.Add( new CommandInfo( command.AccessLevel, aliases[j], newAliases, usage, desc ) );
}
}

list.Sort( new CommandInfoSorter() );

m_SortedHelpInfo = list;

foreach( CommandInfo c in m_SortedHelpInfo )
{
if( !m_HelpInfos.ContainsKey( c.Name.ToLower() ) )
m_HelpInfos.Add( c.Name.ToLower(), c );
}
}

public class CommandListGump : BaseGridGump
{
private const int EntriesPerPage = 15;

int m_Page;
List<CommandInfo> m_List;

public CommandListGump( int page, Mobile from, List<CommandInfo> list )
: base( 30, 30 )
{
m_Page = page;

if( list == null )
{
m_List = new List<CommandInfo>();

foreach( CommandInfo c in m_SortedHelpInfo )
{
if( from.AccessLevel >= c.AccessLevel )
m_List.Add( c );
}
}
else
m_List = list;


AddNewPage();

if( m_Page > 0 )
AddEntryButton( 20, ArrowLeftID1, ArrowLeftID2, 1, ArrowLeftWidth, ArrowLeftHeight );
else
AddEntryHeader( 20 );

AddEntryHtml( 160, Center( String.Format( "Page {0} of {1}", m_Page+1, (m_List.Count + EntriesPerPage - 1) / EntriesPerPage ) ) );

if( (m_Page + 1) * EntriesPerPage < m_List.Count )
AddEntryButton( 20, ArrowRightID1, ArrowRightID2, 2, ArrowRightWidth, ArrowRightHeight );
else
AddEntryHeader( 20 );

int last = (int)AccessLevel.Player - 1;

for( int i = m_Page * EntriesPerPage, line = 0; line < EntriesPerPage && i < m_List.Count; ++i, ++line )
{
CommandInfo c = m_List[i];
if( from.AccessLevel >= c.AccessLevel )
{
if( (int)c.AccessLevel != last )
{
AddNewLine();

AddEntryHtml( 20 + OffsetSize + 160, Color( c.AccessLevel.ToString(), 0xFF0000 ) );
AddEntryHeader( 20 );
line++;
}

last = (int)c.AccessLevel;

AddNewLine();

AddEntryHtml( 20 + OffsetSize + 160, c.Name );

AddEntryButton( 20, ArrowRightID1, ArrowRightID2, 3 + i, ArrowRightWidth, ArrowRightHeight );
}
}

FinishPage();
}

public override void OnResponse( NetState sender, RelayInfo info )
{
Mobile m = sender.Mobile;
switch( info.ButtonID )
{
case 0:
{
m.CloseGump( typeof( CommandInfoGump ) );
break;
}
case 1:
{
if( m_Page > 0 )
m.SendGump( new CommandListGump( m_Page - 1, m, m_List ) );

break;
}
case 2:
{
if( (m_Page + 1) * EntriesPerPage < m_SortedHelpInfo.Count )
m.SendGump( new CommandListGump( m_Page + 1, m, m_List ) );

break;
}
default:
{

int v = info.ButtonID - 3;

if( v >= 0 && v < m_List.Count )
{
CommandInfo c = m_List[v];

if( m.AccessLevel >= c.AccessLevel )
{
m.SendGump( new CommandInfoGump( c ) );
m.SendGump( new CommandListGump( m_Page, m, m_List ) );
}
else
{
m.SendMessage( "You no longer have access to that command." );
m.SendGump( new CommandListGump( m_Page, m, null ) );
}
}
break;
}
}
}
}


public class CommandInfoGump : Gump
{
public string Color( string text, int color )
{
return String.Format( "<BASEFONT COLOR=#{0:X6}>{1}</BASEFONT>", color, text );
}

public string Center( string text )
{
return String.Format( "<CENTER>{0}</CENTER>", text );
}

public CommandInfoGump( CommandInfo info )
: this( info, 320, 200 )
{
}

public CommandInfoGump( CommandInfo info, int width, int height )
: base( 300, 50 )
{
AddPage( 0 );

AddBackground( 0, 0, width, height, 5054 );

//AddImageTiled( 10, 10, width - 20, 20, 2624 );
//AddAlphaRegion( 10, 10, width - 20, 20 );
//AddHtmlLocalized( 10, 10, width - 20, 20, header, headerColor, false, false );
AddHtml( 10, 10, width - 20, 20, Color( Center( info.Name ), 0xFF0000 ), false, false );

//AddImageTiled( 10, 40, width - 20, height - 80, 2624 );
//AddAlphaRegion( 10, 40, width - 20, height - 80 );

StringBuilder sb = new StringBuilder();

sb.Append( "Usage: " );
sb.Append( info.Usage.Replace( "<", "(" ).Replace( ">", ")" ) );
sb.Append( "<BR>" );

string[] aliases = info.Aliases;

if( aliases != null && aliases.Length != 0 )
{
sb.Append( String.Format( "Alias{0}: ", aliases.Length == 1 ? "" : "es" ) );

for( int i = 0; i < aliases.Length; ++i )
{
if( i != 0 )
sb.Append( ", " );

sb.Append( aliases[i] );
}

sb.Append( "<BR>" );
}

sb.Append( "AccessLevel: " );
sb.Append( info.AccessLevel.ToString() );
sb.Append( "<BR>" );
sb.Append( "<BR>" );

sb.Append( info.Description );

AddHtml( 10, 40, width - 20, height - 80, sb.ToString(), false, true );

//AddImageTiled( 10, height - 30, width - 20, 20, 2624 );
//AddAlphaRegion( 10, height - 30, width - 20, 20 );

}
}
}
}