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use std::fmt;

use crate::tor::control_client::{commands::TorCommand, error::TorClientError, response::ResponseLine};

/// The DEL_ONION command.
///
/// This instructs Tor to delete a hidden service.
pub struct DelOnion<'a> {
    service_id: &'a str,
}

impl<'a> DelOnion<'a> {
    pub fn new(service_id: &'a str) -> Self {
        Self { service_id }
    }
}

impl TorCommand for DelOnion<'_> {
    type Error = TorClientError;
    type Output = ();

    fn to_command_string(&self) -> Result<String, Self::Error> {
        Ok(format!("DEL_ONION {}", self.service_id))
    }

    fn parse_responses(&self, mut responses: Vec<ResponseLine>) -> Result<Self::Output, Self::Error> {
        let last_response = responses.pop().ok_or(TorClientError::UnexpectedEof)?;
        if let Some(err) = last_response.err() {
            return Err(TorClientError::TorCommandFailed(err.to_owned()));
        }

        Ok(())
    }
}

impl fmt::Display for DelOnion<'_> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "DEL_ONION (ServiceId = {})", self.service_id)
    }
}

#[cfg(test)]
mod test {
    use super::*;

    #[test]
    fn to_command_string() {
        let command = DelOnion::new("some-random-key");
        assert_eq!(command.to_command_string().unwrap(), "DEL_ONION some-random-key");
    }
}
