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use std::{borrow::Cow, fmt::{Debug, Display}, io, num::ParseIntError, path::StripPrefixError, string::FromUtf8Error};

/// Server Error
pub struct ServerError(Cow<'static,str>);

impl ServerError {
    /// Creates a [ServerError] from a &'static [str]
    #[inline]
    pub fn from_str(msg: &'static str) -> Self {
        Self(msg.into())
    }
    /// Creates a [ServerError] from a [String]
    #[inline]
    pub fn from_string(msg: String) -> Self {
        Self(msg.into())
    }
    /// Turns the [ServerError] into a [Result]<T,[ServerError]>
    #[inline]
    pub fn err<T>(self) -> Result<T,Self> {
        Err(self)
    }
    /// Gets the message inside the [ServerError]
    #[inline]
    pub fn get_message(&self) -> &str {
        &self.0
    }
}

macro_rules! err {
    ($lit:literal) => {
        crate::ServerError::from_str($lit).err()
    };
    ($e:expr) => {
        crate::ServerError::from_string($e).err()
    };
    ($($e:tt)*) => {
        crate::ServerError::from_string(format!($($e)*)).err()
    };
}

pub (crate) use err;

impl From<io::Error> for ServerError {
    #[inline]
    fn from(value: io::Error) -> Self {
        Self::from_string(value.to_string())
    }
}
impl From<FromUtf8Error> for ServerError {
    #[inline]
    fn from(value: FromUtf8Error) -> Self {
        Self::from_string(value.to_string())
    }
}
impl From<std::path::StripPrefixError> for ServerError {
    #[inline]
    fn from(value: StripPrefixError) -> Self {
        Self::from_string(value.to_string())
    }
}
impl From<ParseIntError> for ServerError {
    #[inline]
    fn from(value: ParseIntError) -> Self {
        Self::from_string(value.to_string())
    }
}
impl From<Cow<'static,str>> for ServerError {
    #[inline]
    fn from(value: Cow<'static,str>) -> Self {
        Self(value)
    }
}
impl Debug for ServerError {
    #[inline]
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
       write!(f, "{}", self.get_message())
    }
}

impl Display for ServerError {
    #[inline]
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
       write!(f, "{}", self.get_message())
    }
}

impl From<&'static str> for ServerError {
    fn from(value: &'static str) -> Self {
        Self(value.into())
    }
}

impl From<String> for ServerError {
    fn from(value: String) -> Self {
        Self(value.into())
    }
}

impl std::error::Error for ServerError { }