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use crate::prelude::*;
use std::convert::TryInto;

pub trait Serialize {
    fn serialize(&self) -> Vec<u8>;
}

impl Serialize for String {
    fn serialize(&self) -> Vec<u8> {
        self.as_bytes().to_vec()
    }
}

impl Serialize for PointOfTheCompass {
    fn serialize(&self) -> Vec<u8> {
        match self {
            PointOfTheCompass::North => 0u16,
            PointOfTheCompass::NorthNortheast => 1u16,
            PointOfTheCompass::Northeast => 2u16,
            PointOfTheCompass::EastNortheast => 3u16,
            PointOfTheCompass::East => 4u16,
            PointOfTheCompass::EastSoutheast => 5u16,
            PointOfTheCompass::Southeast => 6u16,
            PointOfTheCompass::SouthSoutheast => 7u16,
            PointOfTheCompass::South => 8u16,
            PointOfTheCompass::SouthSouthwest => 9u16,
            PointOfTheCompass::Southwest => 10u16,
            PointOfTheCompass::WestSouthwest => 11u16,
            PointOfTheCompass::West => 12u16,
            PointOfTheCompass::WestNorthwest => 13u16,
            PointOfTheCompass::Northwest => 14u16,
            PointOfTheCompass::NorthNorthwest => 15u16,
        }
        .serialize()
    }
}

impl Serialize for u8 {
    fn serialize(&self) -> Vec<u8> {
        vec![*self]
    }
}

impl Serialize for u16 {
    fn serialize(&self) -> Vec<u8> {
        self.to_le_bytes().to_vec()
    }
}

impl Serialize for u64 {
    fn serialize(&self) -> Vec<u8> {
        self.to_le_bytes().to_vec()
    }
}

impl Serialize for f64 {
    fn serialize(&self) -> Vec<u8> {
        self.to_bits().serialize()
    }
}

pub trait Deserialize
where
    Self: std::marker::Sized,
{
    fn deserialize(blob: &[u8]) -> Result<Self>;
}

impl Deserialize for String {
    fn deserialize(blob: &[u8]) -> Result<Self> {
        Ok(std::str::from_utf8(blob)?.into())
    }
}

impl Deserialize for u64 {
    fn deserialize(blob: &[u8]) -> Result<Self> {
        Ok(u64::from_le_bytes(blob.try_into()?))
    }
}

impl Deserialize for f64 {
    fn deserialize(blob: &[u8]) -> Result<Self> {
        Ok(f64::from_bits(u64::deserialize(blob)?))
    }
}

impl Deserialize for u16 {
    fn deserialize(blob: &[u8]) -> Result<Self> {
        Ok(u16::from_le_bytes(blob.try_into()?))
    }
}

impl Deserialize for PointOfTheCompass {
    fn deserialize(blob: &[u8]) -> Result<Self> {
        match u16::deserialize(&blob[0..2])? {
            0 => Ok(PointOfTheCompass::North),
            1 => Ok(PointOfTheCompass::NorthNortheast),
            2 => Ok(PointOfTheCompass::Northeast),
            3 => Ok(PointOfTheCompass::EastNortheast),
            4 => Ok(PointOfTheCompass::East),
            5 => Ok(PointOfTheCompass::EastSoutheast),
            6 => Ok(PointOfTheCompass::Southeast),
            7 => Ok(PointOfTheCompass::SouthSoutheast),
            8 => Ok(PointOfTheCompass::South),
            9 => Ok(PointOfTheCompass::SouthSouthwest),
            10 => Ok(PointOfTheCompass::Southwest),
            11 => Ok(PointOfTheCompass::WestSouthwest),
            12 => Ok(PointOfTheCompass::West),
            13 => Ok(PointOfTheCompass::WestNorthwest),
            14 => Ok(PointOfTheCompass::Northwest),
            15 => Ok(PointOfTheCompass::NorthNorthwest),
            value => Err(format_err!("invalid point of the compass value: {}", value)),
        }
    }
}