#[derive(RustcDecodable, RustcEncodable, Debug)]
pub struct Params {
    pub fridge_setpoint: f32,
    pub fridge_difference: f32,
    pub overshoot_delay: u32,
    pub overshoot_factor: f32,
    pub disabled: bool,
    pub nowort: bool,
    pub fridge_range_lower: f32,
    pub fridge_range_upper: f32,
}

impl Params {
    pub fn defaults() -> Params {
        Params {
            fridge_setpoint: 16.0,
            fridge_difference: 0.2,
            overshoot_delay: 720, // 12 minutes
            overshoot_factor: 1.0,
            disabled: false,
            nowort: false,
            fridge_range_lower: 3.0,
            fridge_range_upper: 3.0,
            }
    }
}

#[derive(Debug)]
pub struct ParamHolder {
    pub p: Params,
    epoch: String, // XXX or a byte array?
}

impl ParamHolder {
    pub fn new() -> ParamHolder {
        ParamHolder {
            p: Params::defaults(),
            epoch: String::new(),
        }
    }
}

#[derive(Debug)]
pub struct Reading {
    name: String,
    value: Option<f32>,
}

impl Reading {
    pub fn new(name: String, value: f32) -> Reading {
        Reading { name: name, value: Some(value) }
    }
    pub fn new_none(name: String) -> Reading {
        Reading { name: name, value: None }
    }
}

pub struct Readings {
    temps: Vec<Vec<Reading>>,
}

impl Readings {
    pub fn new() -> Readings {
        Readings {
            temps: Vec::new(),
        }
    }
    pub fn fridge(&self) -> Option<f32> {
        unimplemented!();
    }

    pub fn wort(&self) -> Option<f32> {
        unimplemented!();
    }
}