require("global");

properties = {
    permissions = 0,
    parameters = "ss",
    description =
[[
Positions a targeted npc by some <distance>, defaults to 5 yalms.
!nudge |
!nudge <distance> |
!nudge <distance> <up/down> |
!nudge <distance> <left/right> |
!nudge <distance> <rotate> |
]],

}

vertical = {
["UP"] = 1,
["U"] = 1,
["+"] = 1,
["ASCEND"] = 1,
["DOWN"] = -1,
["D"] = -1,
["-"] = -1,
["DESCEND"] = -1,
}

horizontal = {
["RIGHT"] = 2,
["R"] = 2,
["+"] = 2,
["LEFT"] = -2,
["L"] = -2,
["0"] = -2
}

rotation = {
["ROTATE"] = 3,
["ORIENTATION"] = 3,
["O"] = 3
}

function onTrigger(player, argc, arg1, arg2)
    local messageID = MESSAGE_TYPE_SYSTEM;
    local sender = "[nudge] ";   
	
	local targetActor = player.CurrentArea.FindActorInArea(player.currentTarget) or nil;
	
	
	if (targetActor == nil) then
		player:SendMessage(MESSAGE_TYPE_SYSTEM, sender, "No target was selected.\n");
		return;
	end

    local pos = targetActor:GetPos();
    local x = pos[1];
    local y = pos[2];
    local z = pos[3];
    local rot = pos[4];	
    local zone = pos[5];
    local angle = rot + (math.pi/2); 
    
    local worldManager = GetWorldManager();
 	local distance = 5;
    local direction = 0;

    local checkArg1 = tonumber(arg1);
    local checkArg2 = tonumber(arg2);
    
    if argc == 1 then
        if checkArg1 then
            distance = checkArg1;
        else
            player:SendMessage(messageID, sender, "Unknown parameters! Usage: \n"..properties.description);
            return;
        end
    elseif argc == 2 then
        if checkArg1 and checkArg2 then           -- If both are numbers, just ignore second argument
            distance = checkArg1;
        elseif checkArg1 and not checkArg2 then   -- If first is number and second is string
            distance = checkArg1;
            if vertical[string.upper(arg2)] then                -- Check vertical direction on string
                direction = vertical[string.upper(arg2)];
			elseif horizontal[string.upper(arg2)] then          -- Check horizontal direction on string
                direction = horizontal[string.upper(arg2)];
			elseif rotation[string.upper(arg2)] then            -- Check rotation on string, otherwise throw param error
                direction = rotation[string.upper(arg2)];
            else
               player:SendMessage(messageID, sender, "Unknown parameters! Usage: \n"..properties.description);
               return;
            end
        elseif (not checkArg1) and checkArg2 then -- If first is string and second is number
            distance = checkArg2;
            if vertical[string.upper(arg1)] then                -- Check vertical direction on string
                direction = vertical[string.upper(arg1)];
			elseif horizontal[string.upper(arg1)] then          -- Check horizontal direction on string
                direction = horizontal[string.upper(arg1)];
			elseif rotation[string.upper(arg1)] then            -- Check rotation on string, otherwise throw param error
                direction = rotation[string.upper(arg1)];
            else
                player:SendMessage(messageID, sender, "Unknown parameters! Usage: \n"..properties.description);
                return;
            end
        else
            player:SendMessage(messageID, sender, "Unknown parameters! Usage: \n"..properties.description);
            return;
        end
    end

    if direction == 1 then
        y = y + distance;
		targetActor:SetPos(x,y,z,rot,true, player);
		message = string.format("Moved %s @ %f, %f, %f, %f", targetActor:GetUniqueId(), x, y, z, rot);
    elseif direction == -1 then
        y = y - distance;
        targetActor:SetPos(x,y,z,rot,true, player);
		message = string.format("Moved %s @ %f, %f, %f, %f", targetActor:GetUniqueId(), x, y, z, rot);
	elseif direction == 2 then
		local px = x - distance * math.cos(angle - math.pi/2);
        local pz = z + distance * math.sin(angle - math.pi/2);
        targetActor:SetPos(px, y, pz, rot, true, player);
		message = string.format("Moved %s @ %f, %f, %f, %f", targetActor:GetUniqueId(), px, y, pz, rot);
    elseif direction == -2 then
		local px = x - distance * math.cos(angle + math.pi/2);
        local pz = z + distance * math.sin(angle + math.pi/2);
        targetActor:SetPos(px, y, pz, rot, true, player);		
		message = string.format("Moved %s @ %f, %f, %f, %f", targetActor:GetUniqueId(), px, y, pz, rot);
	elseif direction == 3 then
        targetActor:SetPos(x, y, z, distance, true, player);		
		message = string.format("Moved %s @ %f, %f, %f, %f", targetActor:GetUniqueId(), x, y, z, distance);
    else
        local px = x - distance * math.cos(angle);
        local pz = z + distance * math.sin(angle);
        targetActor:SetPos(px, y, pz, rot, true, player);
		message = string.format("Moved %s @ %f, %f, %f, %f", targetActor:GetUniqueId(), px, y, pz, rot);
    end	

    player:SendMessage(messageID, sender, message);	
end