use std::borrow::Cow;
use std::error::Error;
use std::fmt;

use command_runner::CommandRunner;
use symbols::Symbol;

pub struct TlsCsr<'a> {
  domain: Cow<'a, str>,
  command_runner: &'a CommandRunner
}

impl<'a> TlsCsr<'a> {
  pub fn new(domain: Cow<'a, str>, command_runner: &'a CommandRunner) -> TlsCsr<'a> {
    TlsCsr {
      domain: domain,
      command_runner: command_runner
    }
  }

  fn get_key_path(&self) -> String {
    format!("/etc/ssl/private/{}.key", self.domain)
  }

  fn get_csr_path(&self) -> String {
    format!("/etc/ssl/local_certs/{}.csr", self.domain)
  }
}

impl<'a> fmt::Display for TlsCsr<'a> {
  fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
    write!(f, "TlsCsr {}", self.domain)
  }
}

impl<'a> Symbol for TlsCsr<'a> {
  fn target_reached(&self) -> Result<bool, Box<Error>> {
    let result = self.command_runner.run_with_args("openssl", &["req", "-in", &self.get_csr_path(), "-noout", "-verify"]);
    match result {
      Err(e) => Err(Box::new(e)),
      Ok(output) => match output.status.code() {
        Some(0) => Ok(output.stderr == "verify OK\n".as_bytes()),
        Some(_) => Ok(false),
        _ => Err("Didn't work".to_string().into())
      }
    }
  }

  fn execute(&self) -> Result<(), Box<Error>> {
    let output = try!(self.command_runner.run_with_args("openssl", &["req", "-new", "-sha256", "-key", &self.get_key_path(), "-out", &self.get_csr_path(), "-subj", &format!("/CN={}", self.domain)]).map_err(|e| Box::new(e)));
    Ok(())
  }
}

#[cfg(test)]
mod test {
}