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use std::{
    fmt::{Display, Formatter},
    io,
    net::{SocketAddr, ToSocketAddrs},
    path::Path,
    vec,
};

use figment::{
    providers::{Format, Toml},
    Figment,
};
use serde::{Deserialize, Serialize};

/// The `(host, port)` pair for the server's listening socket.
#[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug, Serialize, Deserialize)]
pub struct Endpoint {
    /// Host used by the store.
    pub host: String,
    /// Port number used by the store.
    pub port: u16,
}

impl ToSocketAddrs for Endpoint {
    type Iter = vec::IntoIter<SocketAddr>;
    fn to_socket_addrs(&self) -> io::Result<Self::Iter> {
        (self.host.as_ref(), self.port).to_socket_addrs()
    }
}

impl Display for Endpoint {
    fn fmt(
        &self,
        f: &mut Formatter<'_>,
    ) -> std::fmt::Result {
        f.write_fmt(format_args!("http://{}:{}", self.host, self.port))
    }
}

/// Loads the user configuration.
///
/// This function will look for the configuration file at the provided path. If the path is
/// relative, searches in parent directories all the way to the root as well.
///
/// The above configuration options are indented to support easy of packaging and deployment.
pub fn load_config(config_file: &Path) -> Figment {
    Figment::from(Toml::file(config_file))
}