use ddc::Ddc;
use ddc_i2c::{I2cDeviceDdc, I2cDeviceEnumerator};

use ::ddcmqtt::StdError;

fn main() -> StdError<()> {
    let args_: Vec<_> = std::env::args().skip(1).collect();
    let args: Vec<&str> = args_.iter().map(|s| &**s).collect();
    match args.as_slice() {
        ["brightness", arg] => ddc_all(0x10, arg.parse::<u16>()?),
        ["input", arg] => ddc_all(0x60, arg.parse::<u16>()?),
        _ => Err("Bad usage".into()),
    }?;
    Ok(())
}

fn ddc_all(feat: u8, val: u16) -> StdError<()> {
    let mut m1 = ddc_i2c::from_i2c_device("/dev/i2c-20")?;
    let mut m2 = ddc_i2c::from_i2c_device("/dev/i2c-21")?;
    m1.set_vcp_feature(feat, val)?;
    m2.set_vcp_feature(feat, val)?;
    Ok(())
}