use serde::Deserialize;
use serde_aux::field_attributes::deserialize_number_from_string;
use std::{fmt::Display, str::FromStr};

#[derive(Debug, Deserialize, Clone)]
pub struct ApplicationSettings {
    #[serde(deserialize_with = "deserialize_number_from_string")]
    pub port: u16,
    pub host: String,
}

#[derive(Debug, Clone)]
pub enum Environment {
    Local,
    Production,
}

impl Display for Environment {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Environment::Local => write!(f, "local"),
            Environment::Production => write!(f, "production"),
        }
    }
}

impl TryFrom<String> for Environment {
    type Error = String;
    fn try_from(value: String) -> Result<Self, Self::Error> {
        match value.to_lowercase().as_str() {
            "local" => Ok(Self::Local),
            "production" => Ok(Self::Production),
            other => Err(format!(
                "{} is not supported environment. \
                Use either `local` or `production`.",
                other
            )),
        }
    }
}

impl FromStr for Environment {
    type Err = String;
    fn from_str(s: &str) -> Result<Self, Self::Err> {
        s.to_owned().try_into()
    }
}