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use crate::cli;

pub struct Config {
    pub uri: String,
    pub identity_file: Option<String>,
}

#[derive(thiserror::Error, Debug)]
pub enum GuessError {
    #[error("No default podman connection info found")]
    NoDefault,
    #[error("Cli error: {0}")]
    Cli(#[from] cli::CliError),
}

impl Config {
    pub async fn guess() -> Result<Config, GuessError> {
        if cfg!(target_os = "macos") {
            let default = cli::get_default_system_connection()
                .await?
                .ok_or(GuessError::NoDefault)?;

            Ok(Config {
                uri: default.uri,
                identity_file: default.identity,
            })
        } else {
            for path_socket in [
                &format!("/run/user/{}/podman/podman.sock", nix::unistd::getuid()),
                "/run/podman/podman.sock",
            ] {
                if std::path::Path::new(path_socket).exists() {
                    return Ok(Config {
                        uri: format!("unix://{path_socket}"),
                        identity_file: None,
                    });
                }
            }

            Err(GuessError::NoDefault)
        }
    }
}