local musicFilename = 'sounds/startup'
local musicChannel = nil
if g_sounds then
    musicChannel = g_sounds.getChannel(SoundChannels.Music)
end

local function onGameStart()
    if not musicChannel then
        return
    end

    musicChannel:stop(3)
end

local function onGameEnd()
    if not musicChannel then
        return
    end

    g_sounds.stopAll()
    if modules.client_options and modules.client_options.getOption('soundAnthem') then
        musicChannel:enqueue(musicFilename, 3)
    end
end

function setMusic(filename)
    musicFilename = filename

    if not g_game.isOnline() then
        musicChannel:stop()
        if modules.client_options and modules.client_options.getOption('soundAnthem') then
            musicChannel:enqueue(musicFilename, 3)
        end
    end
end

function reloadMusic()
    if not musicChannel then
        return
    end

    if not g_game.isOnline() then
        musicChannel:stop()
        if modules.client_options and modules.client_options.getOption('soundAnthem') then
            musicChannel:enqueue(musicFilename, 3)
        end
    end
end

function startup()
    if musicChannel then
        if modules.client_options and modules.client_options.getOption('soundAnthem') then
            musicChannel:enqueue(musicFilename, 3)
        end
    end

    -- Check for startup errors
    local errtitle = nil
    local errmsg = nil

    if g_graphics.getRenderer():lower():match('gdi generic') then
        errtitle = tr('Graphics card driver not detected')
        errmsg = tr(
            'No graphics card detected, everything will be drawn using the CPU,\nthus the performance will be really bad.\nPlease update your graphics driver to have a better performance.')
    end

    -- Show entergame
    if errmsg or errtitle then
        local msgbox = displayErrorBox(errtitle, errmsg)
        msgbox.onOk = function()
            EnterGame.firstShow()
        end
    else
        EnterGame.firstShow()
    end
    if g_app.hasUpdater() and g_sounds then
        g_sounds.setAudioEnabled(g_settings.getBoolean('enableAudio', true))
    end
end

function init()
    if g_app.hasUpdater() then
        connect(g_app, {
            onUpdateFinished = startup,
        })
    else
        connect(g_app, {
            onRun = startup,
        })
    end

    if musicChannel then
        g_sounds.preload(musicFilename)
        connect(g_game, {
            onGameStart = onGameStart,
            onGameEnd = onGameEnd
        })
    end
end

function terminate()
    if g_app.hasUpdater() then
        disconnect(g_app, {
            onUpdateFinished = startup,
        })
    else
        disconnect(g_app, {
            onRun = startup,
        })
    end

    if musicChannel then
        disconnect(g_game, {
            onGameStart = onGameStart,
            onGameEnd = onGameEnd
        })
    end
end