local triggerSplashScreen = false

local rootMenu = {
    {
        label = 'IDOLS',
        children = {
            {label = 'GRACEv6'},
            {label = 'NEARNOAHv6'},
            {label = 'IDKv6'}
        }
    }, {
        label = 'LASER COLORS',
        children = {
            {
                label = 'LEFT LASER',
                children = {
                    {label='BLUE', color={0,128,255}},
                    {label='PINK', color={255,0,255}},
                    {label='GREEN', color={0,255,0}},
                    {label='YELLOW', color={255,255,0}},
                }
            },
            {
                label = 'RIGHT LASER',
                children = {
                    {label='BLUE'},
                    {label='PINK'},
                    {label='GREEN'},
                    {label='YELLOW'},
                }
            }
        }
    }, {
        label = 'MORE OPTIONS',
        children = {{label = 'TEST'}}
    }, {
        label = 'OH YOU SUSSY BAKA',
        children = {{label = 'TEST'}}
    },
    {label = "BACK TO TITLE SCREEN", type="back", handler = function() triggerSplashScreen = true; end}
}

local menu = rootMenu

local index = 1;

render = function(deltaTime)
    gfx.BeginPath();
    gfx.FillColor(0, 0, 0, 255);
    gfx.Rect(0, 0, 1080, 1920);
    gfx.Fill();

    gfx.LoadSkinFont("dfmarugoth.ttf")
    gfx.FillColor(255, 255, 255, 255);
    gfx.TextAlign(gfx.TEXT_ALIGN_CENTER + gfx.TEXT_ALIGN_MIDDLE)
    gfx.FontSize(24);

    gfx.BeginPath();
    gfx.Text('SERIVCE MENU', 1080 / 2, 128);
    gfx.Text('BT-A/BT-B = GO UP/DOWN', 1080 / 2, 1920 - 256 - 28);
    gfx.Text('START = SELECT', 1080 / 2, 1920 - 256);

    gfx.TextAlign(gfx.TEXT_ALIGN_LEFT + gfx.TEXT_ALIGN_MIDDLE)

    local yOffset = 256;
    for i, menuItem in ipairs(menu) do
        if menuItem.type == 'back' then
            yOffset = yOffset + 28 * 2;
        else
            yOffset = yOffset + 28;
        end

        if (i == index) then
            if menuItem.color then
                gfx.FillColor(
                    menuItem.color[1],
                    menuItem.color[2],
                    menuItem.color[3]
                )
            else
                gfx.FillColor(0, 255, 0, 255);
            end
            -- gfx.FillColor(0,128,255,255);
        else
            gfx.FillColor(255, 255, 255, 255);
        end
        gfx.BeginPath();
        gfx.Text(menuItem.label, 100, yOffset);
    end

    if (triggerSplashScreen) then
        triggerSplashScreen = false;
        return {eventType = 'switch', toScreen = 'splash'}
    end
end

local onButtonPressed = function(button)
    if button == game.BUTTON_STA then
        if (menu[index].handler) then
            menu[index].handler()
        elseif menu[index].children ~= nil then
            menu = menu[index].children
            index=1;

            -- If the back button does not exist, add it.
            if (menu[#menu].type ~= 'back') then 
                menu[#menu+1] = {
                    type="back",
                    label = "BACK TO MAIN MENU",
                    handler = function()
                        index=1;
                        menu = rootMenu
                    end
                }
            end
        end
        
    elseif button == game.BUTTON_BTA then
        index = index - 1;
        if (index == 0) then index = #menu end
    elseif button == game.BUTTON_BTB then
        index = index + 1;
        if (index == #menu+1) then index = 1 end
    end
end

return {render = render, onButtonPressed = onButtonPressed}