local obs = obslua

-- Default values
local audio_file = ""
local audio_volume = 1.0
local REPLAY_BUFFER_SAVED_EVENT = 30

-- UI: Define script properties
function script_properties()
    local props = obs.obs_properties_create()

    obs.obs_properties_add_path(props, "audio_file", "Audio File", obs.OBS_PATH_FILE, "WAV files (*.wav)", nil)
    obs.obs_properties_add_float_slider(props, "audio_volume", "Volume", 0.0, 1.0, 0.01)

    return props
end

-- UI: Define default volume
function script_defaults(settings)
    obs.obs_data_set_default_double(settings, "audio_volume", 0.5)
end

-- UI: Load settings from UI
function script_update(settings)
    audio_file = obs.obs_data_get_string(settings, "audio_file")
    audio_volume = obs.obs_data_get_double(settings, "audio_volume")
end

-- Called when script is loaded
function script_load(settings)
    obs.obs_frontend_add_event_callback(on_event)
end



-- Called on replay buffer save
function on_event(event)
    if event == REPLAY_BUFFER_SAVED_EVENT then
        playsound(audio_file, audio_volume)
    end
end

function playsound(file, volume)
    if file == nil or file == "" then
        print("No audio file selected.")
        return
    end

    if volume < 0.0 then volume = 0.0 end
    if volume > 1.0 then volume = 1.0 end

    local play_command

    -- Check if running inside Flatpak
    if os.getenv("FLATPAK_ID") ~= nil then
        -- Use flatpak-spawn to call host binary
        play_command = string.format("flatpak-spawn --host play -v %.2f \"%s\" &", volume, file)
        print("Using flatpak-spawn to run play")
    else
        -- Call directly
        play_command = string.format("play -v %.2f \"%s\" &", volume, file)
        print("Using direct system call to play")
    end

    local run = os.execute(play_command)
    if not run or run ~= 0 then
        print("SOX Playback failed. Falling back to Pipewire-Pulse Audio (no volume control).")
        os.execute(string.format("paplay \"%s\" &", file))
    end
end