{$INCLUDE "options.inc"}

unit uCommands;

interface

var isDeveloperMode: boolean;
type TVariableType = (vtCommand, vtLongInt, vthwFloat, vtBoolean);
     TCommandHandler = procedure (var params: shortstring);

procedure initModule;
procedure freeModule;
procedure RegisterVariable(Name: shortstring; VType: TVariableType; p: pointer; Trusted: boolean);
procedure ParseCommand(CmdStr: shortstring; TrustedSource: boolean);
procedure StopMessages(Message: Longword);

implementation
uses Types, uConsts, uVariables, uConsole, uUtils, uDebug;

type  PVariable = ^TVariable;
      TVariable = record
                     Next: PVariable;
                     Name: string[15];
                    VType: TVariableType;
                  Handler: pointer;
                  Trusted: boolean;
                  end;

var
      Variables: PVariable;

procedure RegisterVariable(Name: shortstring; VType: TVariableType; p: pointer; Trusted: boolean);
var value: PVariable;
begin
New(value);
TryDo(value <> nil, 'RegisterVariable: value = nil', true);
FillChar(value^, sizeof(TVariable), 0);
value^.Name:= Name;
value^.VType:= VType;
value^.Handler:= p;
value^.Trusted:= Trusted;

if Variables = nil then Variables:= value
                   else begin
                        value^.Next:= Variables;
                        Variables:= value
                        end;
end;


procedure ParseCommand(CmdStr: shortstring; TrustedSource: boolean);
var ii: LongInt;
    s: shortstring;
    t: PVariable;
    c: char;
begin
//WriteLnToConsole(CmdStr);
if CmdStr[0]=#0 then exit;
c:= CmdStr[1];
if c in ['/', '$'] then Delete(CmdStr, 1, 1) else c:= '/';
s:= '';
SplitBySpace(CmdStr, s);
{$IFDEF DEBUGFILE}AddFileLog('[Cmd] ' + c + CmdStr + ' (' + inttostr(length(s)) + ')');{$ENDIF}
t:= Variables;
while t <> nil do
      begin
      if t^.Name = CmdStr then
         begin
         if TrustedSource or t^.Trusted then
            case t^.VType of
              vtCommand: if c='/' then
                         begin
                         TCommandHandler(t^.Handler)(s);
                         end;
              vtLongInt: if c='$' then
                         if s[0]=#0 then
                            begin
                            str(PLongInt(t^.Handler)^, s);
                            WriteLnToConsole('$' + CmdStr + ' is "' + s + '"');
                            end else val(s, PLongInt(t^.Handler)^);
              vthwFloat: if c='$' then
                         if s[0]=#0 then
                            begin
                            //str(PhwFloat(t^.Handler)^:4:6, s);
                            WriteLnToConsole('$' + CmdStr + ' is "' + s + '"');
                            end else; //val(s, PhwFloat(t^.Handler)^, i);
             vtBoolean: if c='$' then
                         if s[0]=#0 then
                            begin
                            str(ord(boolean(t^.Handler^)), s);
                            WriteLnToConsole('$' + CmdStr + ' is "' + s + '"');
                            end else
                            begin
                            val(s, ii);
                            boolean(t^.Handler^):= not (ii = 0)
                            end;
              end;
         exit
         end else t:= t^.Next
      end;
case c of
     '$': WriteLnToConsole(errmsgUnknownVariable + ': "$' + CmdStr + '"')
     else WriteLnToConsole(errmsgUnknownCommand  + ': "/' + CmdStr + '"') end
end;


procedure StopMessages(Message: Longword);
begin
if (Message and gmLeft) <> 0 then ParseCommand('/-left', true) else
if (Message and gmRight) <> 0 then ParseCommand('/-right', true) else
if (Message and gmUp) <> 0 then ParseCommand('/-up', true) else
if (Message and gmDown) <> 0 then ParseCommand('/-down', true) else
if (Message and gmAttack) <> 0 then ParseCommand('/-attack', true)
end;

procedure initModule;
begin
    Variables:= nil;
    isDeveloperMode:= true;
end;

procedure freeModule;
var t, tt: PVariable;
begin
    tt:= Variables;
    Variables:= nil;
    while tt <> nil do
    begin
        t:= tt;
        tt:= tt^.Next;
        Dispose(t)
    end;
end;

end.