TOOL.ClientConVar[ "force" ] = "1500"
TOOL.ClientConVar[ "model" ] = "models/props_c17/lampShade001a.mdl"
TOOL.ClientConVar[ "keygroup" ] = "7"
TOOL.ClientConVar[ "keygroup_back" ] = "4"
TOOL.ClientConVar[ "toggle" ] = "0"
TOOL.ClientConVar[ "collision" ] = "0"
TOOL.ClientConVar[ "effect" ] = "1"

cleanup.Register( "thrusters" )

function TOOL:LeftClick( trace )

	if trace.Entity && trace.Entity:IsPlayer() then return false end
	
	// If there's no physics object then we can't constraint it!
	if ( SERVER && !util.IsValidPhysicsObject( trace.Entity, trace.PhysicsBone ) ) then return false end
	
	if (CLIENT) then return true end
	

	
	local ply = self:GetOwner()
	
	local force		= tonumber(	self:GetClientInfo( "force" ) )
	local model		= 		self:GetClientInfo( "model" )
	local key 		= tonumber(	self:GetClientInfo( "keygroup" ) )
	local key_bk 		= tonumber(	self:GetClientInfo( "keygroup_back" ) )
	local toggle		= tonumber(	self:GetClientInfo( "toggle" ) )
	local collision		= tonumber(	self:GetClientInfo( "collision" ) )
	local effect		= tonumber(	self:GetClientInfo( "effect" ) )
	
	// If we shot a thruster change its force and altitude
	if ( trace.Entity:IsValid() && trace.Entity:GetClass() == "gmod_thruster" && trace.Entity:GetTable().pl == ply ) then

		trace.Entity:GetTable():SetForce( force )

		return true
	end
	
	if ( !self:GetSWEP():CheckLimit( "thrusters" ) ) then return false end

	if (not util.IsValidModel(model)) then return false end
	if (not util.IsValidProp(model)) then return false end		// Allow ragdolls to be used?

	local Ang = trace.HitNormal:Angle()
	Ang.pitch = Ang.pitch + 90

	thruster = MakeThruster( ply, model, Ang, trace.HitPos, key, key_bk, force, toggle, effect )
	
	local min = thruster:OBBMins()
	thruster:SetPos( trace.HitPos - trace.HitNormal * min.z )
	
	local const, nocollide
	
	// Don't weld to world
	if ( trace.Entity:IsValid() ) then
		const = constraint.Weld( thruster, trace.Entity, 0, trace.PhysicsBone, 0, systemmanager )
		nocollide = constraint.NoCollide( thruster, trace.Entity, 0, trace.PhysicsBone )
		trace.Entity:DeleteOnRemove( thruster )
		
		// Don't disable collision if it's not attached to anything
		if ( collision == 0 ) then 
			thruster:GetPhysicsObject():EnableCollisions( false )
			thruster:GetTable().nocollide = true
		end
	end
	
	undo.Create("Thruster")
		undo.AddEntity( thruster )
		undo.AddEntity( const )
		undo.AddEntity( nocollide )
		undo.SetPlayer( ply )
	undo.Finish()
	
	ply:AddCount( "thrusters", thruster )
	
	ply:AddCleanup( "thrusters", thruster )
	ply:AddCleanup( "thrusters", const )
	ply:AddCleanup( "thrusters", nocollide )
	
	return true

end

if (SERVER) then

	function MakeThruster( pl, Model, Ang, Pos, key, key_bck, force, toggle, effect, nocollide, Vel, aVel, frozen )
	
		local thruster = ents.Create( "gmod_thruster" )
		if (!thruster:IsValid()) then return false end
		thruster:SetModel( Model )

		thruster:SetAngles( Ang )
		thruster:SetPos( Pos )
		thruster:Spawn()

		thruster:GetTable():SetEffect( effect )
		thruster:GetTable():SetForce( force )
		thruster:GetTable():SetToggle( toggle == 1 )

		numpad.OnDown( 	 pl, 	key, 	"Thruster_On", 		thruster, 1 )
		numpad.OnUp( 	 pl, 	key, 	"Thruster_Off", 	thruster, 1 )
		
		numpad.OnDown( 	 pl, 	key_bck, 	"Thruster_On", 		thruster, -1 )
		numpad.OnUp( 	 pl, 	key_bck, 	"Thruster_Off", 	thruster, -1 )

		if ( nocollide == true ) then thruster:GetPhysicsObject():EnableCollisions( false ) end

		local ttable = {
			key	= key,
			key_bck = key_bck,
			force	= force,
			toggle	= toggle,
			pl	= pl,
			effect	= effect,
			nocollide = nocollide,
			}

		tablex.Merge(thruster:GetTable(), ttable )

		return thruster
		
	end
	
	duplicator.RegisterEntityClass( "gmod_thruster", MakeThruster, "Model", "Ang", "Pos", "key", "key_bck", "force", "toggle", "effect", "nocollide", "Vel", "aVel", "frozen" )

end

function TOOL:UpdateGhostThruster( ent, player )

	if ( !ent ) then return end
	if ( !ent:IsValid() ) then return end

	local tr 	= utilx.GetPlayerTrace( player, player:GetCursorAimVector() )
	local trace 	= util.TraceLine( tr )
	if (!trace.Hit) then return end
	
	if (trace.Entity && trace.Entity:GetClass() == "gmod_thruster" || trace.Entity:IsPlayer()) then
	
		ent:SetNoDraw( true )
		return
		
	end
	
	local Ang = trace.HitNormal:Angle()
	Ang.pitch = Ang.pitch + 90
	
	local min = ent:OBBMins()
	 ent:SetPos( trace.HitPos - trace.HitNormal * min.z )
	ent:SetAngles( Ang )
	
	ent:SetNoDraw( false )
	
end


function TOOL:Think()

	if (!self.GhostEntity || !self.GhostEntity:IsValid() || self.GhostEntity:GetModel() != self:GetClientInfo( "model" )) then
		self:MakeGhostEntity( self:GetClientInfo( "model" ), Vector(0,0,0), Angle(0,0,0) )
	end
	
	self:UpdateGhostThruster( self.GhostEntity, self:GetOwner() )
	
end
