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use bytes::{Buf, BufMut};
use error::Error;
use num_traits::FromPrimitive;
use std::io::{Cursor, Read};

#[allow(non_camel_case_types)]
#[derive(Debug, Clone, PartialEq, PartialOrd)]
pub struct awake {}

impl From<&[u8]> for awake {
    fn from(_: &[u8]) -> awake {
        awake {}
    }
}

impl Into<Vec<u8>> for awake {
    fn into(self) -> Vec<u8> {
        Vec::new()
    }
}

#[allow(non_camel_case_types)]
#[derive(Debug, Clone, PartialEq, PartialOrd)]
pub struct boot {
    pub major: u16,
    pub minor: u16,
    pub patch: u16,
    pub build: u16,
    pub bootloader: u32,
    pub hw: u16,
    pub hash: u32,
}

impl From<&[u8]> for boot {
    fn from(data: &[u8]) -> boot {
        let mut cursor = Cursor::new(data);
        boot {
            major: cursor.get_u16_le(),
            minor: cursor.get_u16_le(),
            patch: cursor.get_u16_le(),
            build: cursor.get_u16_le(),
            bootloader: cursor.get_u32_le(),
            hw: cursor.get_u16_le(),
            hash: cursor.get_u32_le(),
        }
    }
}

impl Into<Vec<u8>> for boot {
    fn into(self) -> Vec<u8> {
        let mut bytes = Vec::new();
        bytes.put_u16_le(self.major);
        bytes.put_u16_le(self.minor);
        bytes.put_u16_le(self.patch);
        bytes.put_u16_le(self.build);
        bytes.put_u32_le(self.bootloader);
        bytes.put_u16_le(self.hw);
        bytes.put_u32_le(self.hash);
        bytes
    }
}

#[allow(non_camel_case_types)]
#[derive(Debug, Clone, PartialEq, PartialOrd)]
pub struct error {
    pub reason: Error,
    pub data: Vec<u8>,
}

impl From<&[u8]> for error {
    fn from(data: &[u8]) -> error {
        let mut cursor = Cursor::new(data);
        let reason = FromPrimitive::from_u16(cursor.get_u16_le()).unwrap();
        let mut data = Vec::new();
        cursor.get_u8();
        cursor
            .read_to_end(&mut data)
            .expect("Failed to read bytes.");
        error { reason, data }
    }
}

impl Into<Vec<u8>> for error {
    fn into(self) -> Vec<u8> {
        let mut bytes = Vec::new();
        bytes.put_u16_le(self.reason.clone() as u16);
        bytes.put_u8(self.data.len() as u8);
        bytes.extend(self.data.iter());
        bytes
    }
}

#[allow(non_camel_case_types)]
#[derive(Debug, Clone, PartialEq, PartialOrd)]
pub struct external_signal {
    pub extsignals: u32,
}

impl From<&[u8]> for external_signal {
    fn from(data: &[u8]) -> external_signal {
        let mut cursor = Cursor::new(data);
        external_signal {
            extsignals: cursor.get_u32_le(),
        }
    }
}

impl Into<Vec<u8>> for external_signal {
    fn into(self) -> Vec<u8> {
        let mut bytes = Vec::new();
        bytes.put_u32_le(self.extsignals);
        bytes
    }
}

#[allow(non_camel_case_types)]
#[derive(Debug, Clone, PartialEq, PartialOrd)]
pub struct hardware_error {
    pub status: u16,
}

impl From<&[u8]> for hardware_error {
    fn from(data: &[u8]) -> hardware_error {
        let mut cursor = Cursor::new(data);
        hardware_error {
            status: cursor.get_u16_le(),
        }
    }
}

impl Into<Vec<u8>> for hardware_error {
    fn into(self) -> Vec<u8> {
        let mut bytes = Vec::new();
        bytes.put_u16_le(self.status);
        bytes
    }
}