use tokio::io::{AsyncWrite, AsyncWriteExt};

use crate::{prelude::Str, response::WriteResponse};

///  ErrNoSuchNick401  
pub struct ErrNoSuchNick401 {
    client: Str,
    nick: Str,
}

impl ErrNoSuchNick401 {
    pub fn new(client: Str, nick: Str) -> Self {
        ErrNoSuchNick401 { client, nick }
    }
}

/// ErrNoSuchServer402
struct ErrNoSuchServer402 {
    client: Str,
    /// target parameter in WHOIS
    /// example:  `/whois <target> <nick>`
    server_name: Str,
}

///  ErrNoNicknameGiven431
pub struct ErrNoNicknameGiven431 {
    client: Str,
}
impl ErrNoNicknameGiven431 {
    pub fn new(client: Str) -> Self {
        ErrNoNicknameGiven431 { client }
    }
}

impl WriteResponse for ErrNoSuchNick401 {
    async fn write_response(&self, writer: &mut (impl AsyncWrite + Unpin)) -> std::io::Result<()> {
        writer.write_all(b"401 ").await?;
        writer.write_all(self.client.as_bytes()).await?;
        writer.write_all(b" ").await?;
        writer.write_all(self.nick.as_bytes()).await?;
        writer.write_all(b" :").await?;
        writer.write_all("No such nick/channel".as_bytes()).await?;
        Ok(())
    }
}

impl WriteResponse for ErrNoNicknameGiven431 {
    async fn write_response(&self, writer: &mut (impl AsyncWrite + Unpin)) -> std::io::Result<()> {
        writer.write_all(b"431").await?;
        writer.write_all(self.client.as_bytes()).await?;
        writer.write_all(b" :").await?;
        writer.write_all("No nickname given".as_bytes()).await?;
        Ok(())
    }
}

impl WriteResponse for ErrNoSuchServer402 {
    async fn write_response(&self, writer: &mut (impl AsyncWrite + Unpin)) -> std::io::Result<()> {
        writer.write_all(b"402 ").await?;
        writer.write_all(self.client.as_bytes()).await?;
        writer.write_all(b" ").await?;
        writer.write_all(self.server_name.as_bytes()).await?;
        writer.write_all(b" :").await?;
        writer.write_all("No such server".as_bytes()).await?;
        Ok(())
    }
}