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use core::fmt::{self, Debug, Display};

use super::TokenMeta;


#[derive(Serialize, Deserialize, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct TokenError<E> {
    meta: TokenMeta,
    error: E,
}

unsafe impl<E> Send for TokenError<E>
    where E: Send,
{}
unsafe impl<E> Sync for TokenError<E>
    where E: Sync,
{}

impl<E> TokenError<E> {
    #[inline(always)]
    pub fn new(meta: TokenMeta, error: E) -> Self {
        TokenError {
            meta: meta,
            error: error,
        }
    }

    #[inline(always)]
    pub fn meta(&self) -> &TokenMeta { &self.meta }
    #[inline(always)]
    pub fn error(&self) -> &E { &self.error }
}

impl<E> fmt::Debug for TokenError<E>
    where E: Debug,
{
    #[inline]
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        let meta = self.meta();

        f.debug_struct("TokenError")
            .field("error", &self.error)
            .field("index", &meta.index_start())
            .field("length", &meta.len())
            .field("lines", &meta.line_count())
            .field("row", &meta.row_start())
            .field("col", &meta.col_start())
            .finish()
    }
}

impl<E> fmt::Display for TokenError<E>
    where E: Display,
{
    #[inline]
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        let meta = self.meta();

        f.debug_struct("TokenError")
            .field("error", &format!("{}", self.error))
            .field("index", &meta.index_start())
            .field("length", &meta.len())
            .field("lines", &meta.line_count())
            .field("row", &meta.row_start())
            .field("col", &meta.col_start())
            .finish()
    }
}