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use std::{error::Error as StdError, fmt};

#[derive(Debug, Eq, PartialEq, Clone)]
pub struct TokenizerError {
    pub context: String,
    pub nom_kind: Option<nom::error::ErrorKind>,
}

impl<'a, S, T> From<(S, T)> for TokenizerError
where
    S: std::fmt::Display,
    T: std::fmt::Display,
{
    fn from(from: (S, T)) -> Self {
        Self {
            context: format!("failed to tokenize {}: {}", from.0, from.1),
            nom_kind: None,
        }
    }
}

impl From<&'static str> for TokenizerError {
    fn from(from: &'static str) -> Self {
        Self {
            context: from.into(),
            nom_kind: None,
        }
    }
}

#[allow(clippy::from_over_into)]
impl Into<nom::Err<Self>> for TokenizerError {
    fn into(self) -> nom::Err<Self> {
        nom::Err::Error(self)
    }
}

/*
#[allow(clippy::from_over_into)]
impl<'a, T> Into<crate::IResult<'a, T>> for TokenizerError {
    fn into(self) -> crate::IResult<'a, T> {
        Err(nom::Err::Error(self))
    }
}*/

impl fmt::Display for TokenizerError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "Tokenizer error: {}", self.context)
    }
}

impl StdError for TokenizerError {}

impl<T: std::fmt::Display> nom::error::ParseError<T> for TokenizerError {
    fn from_error_kind(input: T, kind: nom::error::ErrorKind) -> Self {
        Self {
            context: format!("could not tokenize ({:?}): {}", kind, input),
            nom_kind: Some(kind),
        }
    }
    fn append(input: T, kind: nom::error::ErrorKind, other: Self) -> Self {
        Self {
            context: format!(
                "{}. Also, could not tokenize ({:?}): {}",
                other, kind, input,
            ),
            nom_kind: other.nom_kind,
        }
    }
}