DefineClass.MoveGizmoTool = {
	__parents = { "Mesh" },
	
	mesh_x = pstr(""),
	mesh_y = pstr(""),
	mesh_z = pstr(""),
	mesh_xy = pstr(""),
	mesh_xz = pstr(""),
	mesh_yz = pstr(""),

	b_over_axis_x = false,
	b_over_axis_y = false,
	b_over_axis_z = false,
	b_over_plane_xy = false,
	b_over_plane_xz = false,
	b_over_plane_yz = false,
	
	v_axis_x = axis_x,
	v_axis_y = axis_y,
	v_axis_z = axis_z,
	
	opacity = 110,
	
	r_color = RGB(192, 0, 0),
	g_color = RGB(0, 192, 0),
	b_color = RGB(0, 0, 192),
	
	-- rotation arrows, clockwise (cw) and counter-clockwise (ccw)
	arrow_xcw = pstr(""),
	arrow_xccw = pstr(""),
	arrow_ycw = pstr(""),
	arrow_yccw = pstr(""),
	arrow_zcw = pstr(""),
	arrow_zccw = pstr(""),
	
	-- settings
	rotation_arrows_on = false,
	rotation_arrows_z_only = false,
}

function MoveGizmoTool:ApplyOpacity(color, opacity)
	local r, g, b = GetRGB(color)
	return RGBA(r, g, b, self.opacity)
end

function MoveGizmoTool:RenderGizmo()
	local vpstr = pstr("")
	
	self.mesh_x = self:RenderAxis(nil, axis_y, self.b_over_axis_x, false)
	self.mesh_y = self:RenderAxis(nil, -axis_x, self.b_over_axis_y, false)
	self.mesh_z = self:RenderAxis(nil, axis_z, self.b_over_axis_z, false)
	self.mesh_xy = self:RenderPlane(nil, axis_z)
	self.mesh_xz = self:RenderPlane(nil, axis_x)
	self.mesh_yz = self:RenderPlane(nil, -axis_y)
	
	local r = self:ApplyOpacity(self.r_color)
	local g = self:ApplyOpacity(self.g_color)
	local b = self:ApplyOpacity(self.b_color)
	
	self.arrow_xcw  = self:RenderRotationArrow(nil,  axis_x, g, false)
	self.arrow_xccw = self:RenderRotationArrow(nil,  axis_x, g, true)
	self.arrow_ycw  = self:RenderRotationArrow(nil, -axis_y, r, false)
	self.arrow_yccw = self:RenderRotationArrow(nil, -axis_y, r, true)
	self.arrow_zcw  = self:RenderRotationArrow(nil,  axis_z, b, false)
	self.arrow_zccw = self:RenderRotationArrow(nil,  axis_z, b, true)
	
	vpstr = self:RenderAxis(vpstr,  axis_y, self.b_over_axis_x, true, r)
	vpstr = self:RenderAxis(vpstr, -axis_x, self.b_over_axis_y, true, g)
	vpstr = self:RenderAxis(vpstr,  axis_z, self.b_over_axis_z, true, b)
	vpstr = self:RenderPlaneOutlines(vpstr)
	
	if self.b_over_plane_xy then vpstr = self:RenderPlane(vpstr,  axis_z) end
	if self.b_over_plane_xz then vpstr = self:RenderPlane(vpstr,  axis_x) end
	if self.b_over_plane_yz then vpstr = self:RenderPlane(vpstr, -axis_y) end
	
	if self.rotation_arrows_on then
		if not self.rotation_arrows_z_only then
			self:RenderRotationArrow(vpstr,  axis_x, g, false)
			self:RenderRotationArrow(vpstr,  axis_x, g, true)
			self:RenderRotationArrow(vpstr, -axis_y, r, false)
			self:RenderRotationArrow(vpstr, -axis_y, r, true)
		end
		self:RenderRotationArrow(vpstr, axis_z, b, false)
		self:RenderRotationArrow(vpstr, axis_z, b, true)
	end
	
	return vpstr
end

function MoveGizmoTool:ChangeScale()
	local eye = camera.GetEye()
	local dir = self:GetVisualPos()
	local ray = dir - eye
	local cameraDistanceSquared = ray:x() * ray:x() + ray:y() * ray:y() + ray:z() * ray:z()
	local cameraDistance = 0
	if cameraDistanceSquared >= 0 then cameraDistance = sqrt(cameraDistanceSquared) end
	self.scale = cameraDistance / 20 * self.scale / 100
end

function MoveGizmoTool:CursorIntersection(mouse_pos)
	local pt1 = camera.GetEye()
	local precision = 128 -- should not lead to overflow for maps up to 20x20 km (with guim == 1000)
	local dir = ScreenToGame(mouse_pos, precision) - pt1 * precision
	local pt2 = pt1 + dir
	local pos = self:GetVisualPos()
	if self.b_over_axis_x or self.b_over_axis_y or self.b_over_axis_z then
		local axis
		if self.b_over_axis_x then
			axis = self.v_axis_x
		elseif self.b_over_axis_y then
			axis = self.v_axis_y
		elseif self.b_over_axis_z then
			axis = self.v_axis_z
		end
		local camDir = Normalize(camera.GetEye() - pos)
		local camX = Normalize(Cross((camDir), axis_z))
		local planeB = pos + camX
		local planeC = pos + Normalize(Cross((camDir), camX))
		local ptA = pos
		local ptB = ptA + axis
		local intersection = IntersectRayPlane(pt1, pt2, pos, planeB, planeC)
		intersection = ProjectPointOnLine(ptA, ptB, intersection)
		return intersection
	elseif self.b_over_plane_xy or self.b_over_plane_xz or self.b_over_plane_yz then
		local normal, planeB, planeC
		if self.b_over_plane_xy then
			normal = self.v_axis_z
			planeB = pos + self.v_axis_x
			planeC = pos + self.v_axis_y
		elseif self.b_over_plane_xz then
			normal = self.v_axis_y
			planeB = pos + self.v_axis_x
			planeC = pos + self.v_axis_z
		elseif self.b_over_plane_yz then
			normal = self.v_axis_x
			planeB = pos + self.v_axis_y
			planeC = pos + self.v_axis_z
		end
		local intersection = IntersectRayPlane(pt1, pt2, pos, planeB, planeC)
		intersection = ProjectPointOnPlane(pos, normal, intersection)
		return intersection
	end
end

function MoveGizmoTool:IntersectRay(pt1, pt2)
	self.b_over_plane_xy = false	
	self.b_over_plane_xz = false
	self.b_over_plane_yz = false
	
	self.b_over_axis_x = IntersectRayMesh(self, pt1, pt2, self.mesh_x)
	self.b_over_axis_y = IntersectRayMesh(self, pt1, pt2, self.mesh_y)
	self.b_over_axis_z = IntersectRayMesh(self, pt1, pt2, self.mesh_z)
	
	local hit, axis, ccw
	if     IntersectRayMesh(self, pt1, pt2, self.arrow_xcw ) then hit, axis, ccw = true,  axis_x, false
	elseif IntersectRayMesh(self, pt1, pt2, self.arrow_xccw) then hit, axis, ccw = true,  axis_x, true
	elseif IntersectRayMesh(self, pt1, pt2, self.arrow_ycw ) then hit, axis, ccw = true, -axis_y, false
	elseif IntersectRayMesh(self, pt1, pt2, self.arrow_yccw) then hit, axis, ccw = true, -axis_y, true
	elseif IntersectRayMesh(self, pt1, pt2, self.arrow_zcw ) then hit, axis, ccw = true,  axis_z, false
	elseif IntersectRayMesh(self, pt1, pt2, self.arrow_zccw) then hit, axis, ccw = true,  axis_z, true end
	self.b_over_rotation_arrow = hit
	self.arrow_axis = axis
	self.arrow_ccw = ccw
	
	if self.b_over_axis_x then
		self.b_over_axis_y = false
		self.b_over_axis_z = false
		return true
	elseif self.b_over_axis_y then
		self.b_over_axis_x = false
		self.b_over_axis_z = false
		return true
	elseif self.b_over_axis_z then
		self.b_over_axis_x = false
		self.b_over_axis_y = false
		return true
	else
		local overPlaneXY, lenXY = IntersectRayMesh(self, pt1, pt2, self.mesh_xy)
		local overPlaneXZ, lenXZ = IntersectRayMesh(self, pt1, pt2, self.mesh_xz)
		local overPlaneYZ, lenYZ = IntersectRayMesh(self, pt1, pt2, self.mesh_yz)
		
		if not (overPlaneXY or overPlaneXZ or overPlaneYZ) then return end
		
		if overPlaneXY then 
			self.b_over_plane_xy = true 
			return true
		elseif lenXZ and lenYZ then
			if lenXZ < lenYZ then 
				self.b_over_plane_xz = overPlaneXZ
				return overPlaneXZ
			else 
				self.b_over_plane_yz = overPlaneYZ 
				return overPlaneYZ
			end
		elseif overPlaneXZ then 
			self.b_over_plane_xz = true
			return true
		elseif overPlaneYZ then 
			self.b_over_plane_yz = true 
			return true
		end
	end
end

function MoveGizmoTool:RenderAxis(vpstr, axis, selected, visual, color)
	vpstr = vpstr or pstr("")
	local cylinderRadius = visual and 0.1 * self.scale * self.thickness / 100 or 0.1 * self.scale
	local cylinderHeight = 4.0 * self.scale
	local coneRadius = visual and 0.45 * self.scale * self.thickness / 100 or 0.45 * self.scale
	local coneHeight = 1.0 * self.scale
	color = selected and RGBA(255, 255, 0, self.opacity) or color
	
	vpstr = AppendConeVertices(vpstr, nil, point(0, 0, cylinderHeight), cylinderRadius, cylinderRadius, axis, 90, color)
	vpstr = AppendConeVertices(vpstr, point(0, 0, cylinderHeight), point(0, 0, coneHeight), coneRadius, 0, axis, 90, color)
	return vpstr
end

function MoveGizmoTool:RenderPlaneOutlines(vpstr)
	local height = 2.5 * self.scale
	local radius = 0.05 * self.scale * self.thickness / 100
	local r = self:ApplyOpacity(self.r_color)
	local g = self:ApplyOpacity(self.g_color)
	local b = self:ApplyOpacity(self.b_color)
	
	vpstr = AppendConeVertices(vpstr, nil, point(0, 0, height), radius, radius,  axis_z, 90, r, point(height, 0, 0))
	vpstr = AppendConeVertices(vpstr, nil, point(0, 0, height), radius, radius, -axis_x, 90, r, point(height, 0, 0))
	vpstr = AppendConeVertices(vpstr, nil, point(0, 0, height), radius, radius,  axis_z, 90, g, point(0, height, 0))
	vpstr = AppendConeVertices(vpstr, nil, point(0, 0, height), radius, radius,  axis_y, 90, g, point(0, height, 0))
	vpstr = AppendConeVertices(vpstr, nil, point(0, 0, height), radius, radius,  axis_y, 90, b, point(0, 0, height))
	vpstr = AppendConeVertices(vpstr, nil, point(0, 0, height), radius, radius, -axis_x, 90, b, point(0, 0, height))
	return vpstr
end

function MoveGizmoTool:TransformPointsToAxisPlane(axis, ...)
	local angle = (axis == -axis_y or axis == axis_x) and 90 * 60 or 0
	local pts = table.pack(...)
	for i, pt in ipairs(pts) do
		pts[i] = RotateAxis(pt, axis, angle)
	end
	return pts
end

function MoveGizmoTool:RenderPlane(vpstr, axis)
	vpstr = vpstr or pstr("")
	local color = RGBA(255, 255, 0, self.opacity * 200 / 255)
	local dist = 2.5 * self.scale
	local pts = self:TransformPointsToAxisPlane(axis, point30, point(dist, 0, 0), point(dist, dist, 0), point(0, dist, 0))
 	vpstr:AppendVertex(pts[1], color)
	vpstr:AppendVertex(pts[2])
	vpstr:AppendVertex(pts[4])
	vpstr:AppendVertex(pts[3])
	vpstr:AppendVertex(pts[2])
	vpstr:AppendVertex(pts[4])
	return vpstr
end

function MoveGizmoTool:RenderRotationArrow(vpstr, axis, color, ccw)
	local size = 0.7 * self.scale
	local dist = 2.1 * self.scale
	local offs = 0.1 * self.scale
	local corner = point(dist, dist, 0)
	local offset = point(offs, offs, 0)
	local a1, a2, a3 = point(size, 0, 0), point(0, size, 0), point(size, size, 0)
	a1 = Rotate(a1 + offset, (ccw and 45 or -45) * 60) + corner
	a2 = Rotate(a2 + offset, (ccw and 45 or -45) * 60) + corner
	a3 = Rotate(a3 + offset, (ccw and 45 or -45) * 60) + corner
	
	if self.b_over_rotation_arrow and axis == self.arrow_axis and self.arrow_ccw == ccw then
		color = RGBA(255, 255, 0, self.opacity * 200 / 255)
	end
	
	vpstr = vpstr or pstr("")
	local pts = self:TransformPointsToAxisPlane(axis, a1, a2, a3)
 	vpstr:AppendVertex(pts[1], color)
	vpstr:AppendVertex(pts[2])
	vpstr:AppendVertex(pts[3])
	return vpstr
end

DefineClass.MoveGizmo = {
	__parents = { "XEditorGizmo", "MoveGizmoTool" },
	
	HasLocalCSSetting = true,
	HasSnapSetting = true,
	
	Title = "Move gizmo (W)",
	Description = false,
	ActionSortKey = "1",
	ActionIcon = "CommonAssets/UI/Editor/Tools/MoveGizmo.tga",
	ActionShortcut = "W",
	UndoOpName = "Moved %d object(s)",
	
	rotation_arrows_on = true,
	
	operation_started = false,
	initial_positions = false,
	initial_pos = false,
	initial_gizmo_pos = false,
	move_by_slabs = false,
}

function MoveGizmo:CheckStartOperation(pt, btn_pressed)
	local objs = editor.GetSel()
	if #objs == 0 then return end
	
	-- check move operations first
	local ret = self:IntersectRay(camera.GetEye(), ScreenToGame(pt))
	if ret then return ret end
	
	if self.b_over_rotation_arrow and btn_pressed then
		XEditorUndo:BeginOp{ objects = objs, name = string.format("Rotated %d objects", #objs) }
		
		local center = self:GetVisualPos()
		local axis = self.arrow_axis
		if axis ~= axis_z then
			axis = SetLen(Cross(self.arrow_axis, axis_z), 4096)
		end
		local angle = self.arrow_ccw and 90*60 or -90*60
		if self.local_cs then
			axis = self:GetRelativePoint(axis) - self:GetVisualPos()
		end
		
		local rotate_logic = XEditorRotateLogic:new()
		SuspendPassEditsForEditOp()
		rotate_logic:InitRotation(objs, center, 0)
		rotate_logic:Rotate(objs, "group_rotation", center, axis, angle)
		ResumePassEditsForEditOp()
		
		XEditorUndo:EndOp(objs)
		return "break"
	end
end

function MoveGizmo:StartOperation(pt)
	self.initial_positions = {}
	
	local has_aligned, move_by_z = false, self.b_over_axis_z or self.b_over_plane_xz or self.b_over_plane_yz
	for _, obj in ipairs(editor.GetSel()) do
		local pos = obj:GetVisualPos()
		if obj:IsKindOf("AlignedObj") then
			pos = move_by_z and pos:AddZ((const.SlabSizeZ or 0) / 2) or obj:GetPos()
			has_aligned = true
		end
		self.initial_positions[obj] = pos
	end
	
	self.move_by_slabs = has_aligned
	self.initial_pos = self:CursorIntersection(pt)
	self.initial_gizmo_pos = self:GetVisualPos()
	self.operation_started = true
end

function MoveGizmo:PerformOperation(pt)
	local intersection = self:CursorIntersection(pt)
	if intersection then
		local objs = {}
		local vMove = intersection - self.initial_pos
		for obj, pos in pairs(self.initial_positions) do
			XEditorSnapPos(obj, pos, vMove, self.move_by_slabs)
			objs[#objs + 1] = obj
		end
		self:SetPos(self.initial_gizmo_pos + vMove)
		Msg("EditorCallback", "EditorCallbackMove", objs)
	end
end

function MoveGizmo:EndOperation()
	self.initial_positions = false
	self.initial_pos = false
	self.operation_started = false
	self.initial_gizmo_pos = false
end

local saneBox = box(-const.SanePosMaxXY, -const.SanePosMaxXY, const.SanePosMaxXY - 1, const.SanePosMaxXY - 1)
local saneZ = const.SanePosMaxZ

function MoveGizmo:Render()
	local obj = not XEditorIsContextMenuOpen() and selo()
	if obj then
		if self.local_cs then
			self.v_axis_x, self.v_axis_y, self.v_axis_z = GetAxisVectors(obj)
			self:SetAxisAngle(obj:GetAxis(), obj:GetAngle())
		else
			self.v_axis_x = axis_x
			self.v_axis_y = axis_y
			self.v_axis_z = axis_z
			self:SetOrientation(axis_z, 0)
		end
		if not self.operation_started then
			local pos = CenterOfMasses(editor.GetSel())
			local clamped_pos = ClampPoint(pos, saneBox):SetZ(Clamp(pos:z(), -saneZ, saneZ - 1))
			self:SetPos(clamped_pos, 0)
		end
		self:ChangeScale()
		self:SetMesh(self:RenderGizmo())
	else 
		self:SetMesh(pstr("")) 
	end
end