use bytes::Bytes;
use std::{fmt, fmt::Formatter};

pub enum PayloadError {}

// TODO: support stream data
#[derive(Clone, Debug, serde::Serialize)]
pub enum Payload {
    None,
    Bytes(Vec<u8>),
}

impl std::fmt::Display for Payload {
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        match self {
            Payload::Bytes(bytes) => f.write_fmt(format_args!("{} bytes", bytes.len())),
            Payload::None => f.write_str("Empty"),
        }
    }
}

impl std::convert::Into<Payload> for String {
    fn into(self) -> Payload { Payload::Bytes(self.into_bytes()) }
}

impl std::convert::Into<Payload> for &'_ String {
    fn into(self) -> Payload { Payload::Bytes(self.to_owned().into_bytes()) }
}

impl std::convert::Into<Payload> for Bytes {
    fn into(self) -> Payload {
        // Opti(nathan): do not copy the bytes?
        Payload::Bytes(self.as_ref().to_vec())
    }
}

impl std::convert::Into<Payload> for Vec<u8> {
    fn into(self) -> Payload { Payload::Bytes(self) }
}

impl std::convert::Into<Payload> for &str {
    fn into(self) -> Payload { self.to_string().into() }
}