local schemeMgr = CEGUI.SchemeManager:getSingleton()
local winMgr = CEGUI.WindowManager:getSingleton()
local logger = CEGUI.Logger:getSingleton()
local system = CEGUI.System:getSingleton()
local cursor = CEGUI.MouseCursor:getSingleton()

schemeMgr:loadScheme("TaharezLookSkin.scheme")
-- load scheme with our own images
schemeMgr:loadScheme("OrxonoxGUIScheme.scheme")

system:setDefaultMouseCursor("TaharezLook", "MouseArrow")
system:setDefaultFont("BlueHighway-12")

local current = nil
local loadedGUIs = {}
local showing
-- we cannot directly call functions with parameters and so need this as a global variable, which sucks of course
filename = ""
datapath = "" -- points to media-folder (set after loading the script)

-- function to add a reference to list of reference of loaded GUIs
loadedGUIs.addGUI = function (gui)
    loadedGUIs[#loadedGUIs+1] = gui
end

-- function which returns a GUI by name
loadedGUIs.getGUIbyName = function (str)
    for i = 1, #loadedGUIs, 1 do
        if str == loadedGUIs[i].filename then
            return loadedGUIs[i]
        end
    end
    return nil
end

-- loads the GUI with the specified filename
-- be sure to set the global variable "filename" before calling this function
function loadGUI()
    -- check if it already exists
    newlyLoaded = loadedGUIs:getGUIbyName(filename)
    if newlyLoaded == nil then
        dofile(datapath .. "gui/scripts/" .. filename)
        newlyLoaded = winMgr:loadWindowLayout(layoutPath)
        newlyLoaded.filename = filename
        loadedGUIs:addGUI(newlyLoaded)
        -- if there has no GUI been loaded yet, set new GUI as current
        if #loadedGUIs == 1 then
            current = loadedGUIs[1]
            showing = false
        end
        -- hide new GUI as we do not want to show it accidentially
        newlyLoaded:hide()
    end
    return newlyLoaded
end

-- shows the specified and loads it if not loaded already
-- be sure to set the global variable "filename" before calling this function
function showGUI()
    if current == nil or current.filename ~= filename then
        current = loadedGUIs.getGUIbyName(filename)
        if current == nil then
            current = loadGUI(filename)
        end
        system:setGUISheet(current)
    end
    current:show()
    cursor:show()
    showing = true
end

function toggleGUI()
    if showing == true then
        current:hide()
        cursor:hide()
        showing = false
    else
        current:show()
        cursor:show()
        showing = true
    end
    return showing
end

function hideGUI()
    current:hide()
    showing = false
end