use log::warn;

#[derive(Deserialize, Debug, Clone)]
pub struct Color {
    pub hue: f32,
    pub saturation: f32,
    pub kelvin: i16,
}

#[derive(Deserialize, Debug, Clone)]
pub struct Light {
    pub id: String,
    pub label: String,
    pub connected: bool,
    pub power: String,
    pub color: Color,
    pub brightness: f32,
}

pub const POWER: &str = "power";
pub const BRIGHTNESS: &str = "brightness";
pub const HUE: &str = "hue";
pub const SATURATION: &str = "saturation";
pub const KELVIN: &str = "kelvin";

pub enum Value {
    Power(String),
    Brightness(f32),
    Hue(f32),
    Saturation(f32),
    Kelvin(i16),
}

impl Value {
    pub fn new(label: &str, value: Vec<u8>) -> Option<Self> {
        match label {
            POWER => Some(Value::Power(
                String::from_utf8(value.clone())
                    .or_else(|x| {
                        warn!("{:#?}: {}", value, x);
                        Err(x)
                    })
                    .ok()?,
            )),
            BRIGHTNESS => Some(Value::Brightness(vec_to_f32(value)?)),
            HUE => Some(Value::Hue(vec_to_f32(value)?)),
            SATURATION => Some(Value::Saturation(vec_to_f32(value)?)),
            KELVIN => Some(Value::Kelvin(vec_to_i16(value)?)),
            _ => unimplemented!(),
        }
    }

    pub fn unravel(self) -> (&'static str, Vec<u8>) {
        match self {
            Value::Power(val) => (POWER, val.into_bytes()),
            Value::Brightness(val) => (BRIGHTNESS, (val as u32).to_ne_bytes().to_vec()),
            Value::Hue(val) => (HUE, (val as u32).to_ne_bytes().to_vec()),
            Value::Saturation(val) => (SATURATION, (val as u32).to_ne_bytes().to_vec()),
            Value::Kelvin(val) => (KELVIN, (val as u32).to_ne_bytes().to_vec()),
        }
    }
}

fn vec_to_f32(value: Vec<u8>) -> Option<f32> {
    if value.len() == 4 {
        Some(u32::from_ne_bytes([value[0], value[1], value[2], value[3]]) as f32)
    } else {
        None
    }
}

fn vec_to_i16(value: Vec<u8>) -> Option<i16> {
    if value.len() == 2 {
        Some(i16::from_ne_bytes([value[0], value[1]]))
    } else {
        None
    }
}

pub struct Command {
    pub lightname: String,
    pub command: Value,
}

pub struct Update {
    pub lightname: String,
    pub status: Value,
}

impl Update {
    pub fn new(lightname: &str, status: Value) -> Self {
        Update {
            lightname: lightname.to_owned(),
            status,
        }
    }
}

pub enum Status {
    Update(Update),
    New(Light),
    Remove(String),
}