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use core::time::Duration;

#[cfg(feature = "alloc")]
extern crate alloc;

#[cfg(feature = "use_serde")]
use serde::{Deserialize, Serialize};

use crate::ipv4;

#[derive(Clone, Debug, PartialEq)]
#[cfg_attr(feature = "use_serde", derive(Serialize, Deserialize))]
pub struct Configuration {
    pub count: u32,
    pub interval: Duration,
    pub timeout: Duration,
    pub data_size: u32,
    pub tos: u8,
}

impl Default for Configuration {
    fn default() -> Self {
        Configuration {
            count: 5,
            interval: Duration::from_secs(1),
            timeout: Duration::from_secs(1),
            data_size: 56,
            tos: 0,
        }
    }
}

#[derive(Clone, Debug, PartialEq)]
#[cfg_attr(feature = "use_serde", derive(Serialize, Deserialize))]
pub struct Info {
    pub addr: ipv4::Ipv4Addr,
    pub seqno: u32,
    pub ttl: u8,
    pub elapsed_time: Duration,
    pub recv_len: u32,
}

#[derive(Clone, Debug, PartialEq)]
#[cfg_attr(feature = "use_serde", derive(Serialize, Deserialize))]
pub enum Reply {
    Timeout,
    Success(Info),
}

#[derive(Clone, Debug, PartialEq, Default)]
#[cfg_attr(feature = "use_serde", derive(Serialize, Deserialize))]
pub struct Summary {
    pub transmitted: u32,
    pub received: u32,
    pub time: Duration,
}

pub trait Ping {
    type Error;

    fn ping(&mut self, ip: ipv4::Ipv4Addr, conf: &Configuration) -> Result<Summary, Self::Error>;

    fn ping_details<F: Fn(&Summary, &Reply)>(
        &mut self,
        ip: ipv4::Ipv4Addr,
        conf: &Configuration,
        reply_callback: &F,
    ) -> Result<Summary, Self::Error>;
}

#[cfg(feature = "alloc")]
pub struct AnyhowPing<T>(pub T);

#[cfg(feature = "alloc")]
impl<E, P> Ping for AnyhowPing<P>
where
    E: Into<anyhow::Error>,
    P: Ping<Error = E>,
{
    type Error = anyhow::Error;

    fn ping(&mut self, ip: ipv4::Ipv4Addr, conf: &Configuration) -> Result<Summary, Self::Error> {
        self.0.ping(ip, conf).map_err(Into::into)
    }

    fn ping_details<F: Fn(&Summary, &Reply)>(
        &mut self,
        ip: ipv4::Ipv4Addr,
        conf: &Configuration,
        reply_callback: &F,
    ) -> Result<Summary, Self::Error> {
        self.0
            .ping_details(ip, conf, reply_callback)
            .map_err(Into::into)
    }
}