pub mod acme;
pub mod checker;
pub mod config;
pub mod manager;

use std::fmt;
use std::str::FromStr;

use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
use trust_dns_client::rr as trust_dns_rr;

#[derive(Debug, Clone)]
/// Validated representation of a domain name
pub struct Name {
    inner: trust_dns_rr::Name,
    utf8_str: String,
}

impl Name {
    pub fn as_str(&self) -> &str {
        self.utf8_str.as_str()
    }
}

impl fmt::Display for Name {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{}", self.utf8_str)
    }
}

impl FromStr for Name {
    type Err = <trust_dns_rr::Name as FromStr>::Err;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        let mut n = trust_dns_rr::Name::from_str(s)?;
        let utf8_str = n.clone().to_utf8();

        n.set_fqdn(true);

        Ok(Name { inner: n, utf8_str })
    }
}

impl Serialize for Name {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        serializer.serialize_str(self.as_str())
    }
}

struct NameVisitor;

impl<'de> de::Visitor<'de> for NameVisitor {
    type Value = Name;

    fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
        write!(formatter, "a valid domain name")
    }

    fn visit_str<E>(self, s: &str) -> Result<Self::Value, E>
    where
        E: de::Error,
    {
        match Name::from_str(s) {
            Ok(n) => Ok(n),
            Err(e) => Err(E::custom(format!("invalid domain name: {}", e))),
        }
    }
}

impl<'de> Deserialize<'de> for Name {
    fn deserialize<D>(deserializer: D) -> Result<Name, D::Error>
    where
        D: Deserializer<'de>,
    {
        deserializer.deserialize_str(NameVisitor)
    }
}