type Result<T> =
    { type: "success" } & T
    | { type: "error", message: string };

type Brightness =
    { type: "off" }
    | { type: "switch" }
    | { type: "dimmer", value: number }
    | { type: "strobe", value: number };

type MovingHeadState = {
    start_address: number, // [0, 512]

    pan: number, // [-3pi/2, 3pi/2]
    tilt: number, // [-pi/2, pi/2]
    brightness: Brightness,
    rgbw: [number, number, number, number], // RGBW, [0, 255]
    speed: number, // [255, 0]
}

type OutputHandle = {
    set: (heads: [MovingHeadState, MovingHeadState, MovingHeadState, MovingHeadState]) => Result<{}>,
    close: () => Result<{}>,
}

declare module rust_native_module {
    function listPorts(): Array<string>;
    function openOutput(): Result<OutputHandle>;
}

export = rust_native_module;