use pest;
use serde::de;
use std::fmt::{self, Display};

use crate::Rule;

pub type MpdResult<T> = std::result::Result<T, Error>;

#[derive(Clone, Debug, PartialEq)]
pub struct Error {
    pub message: String,
}

impl From<pest::error::Error<Rule>> for Error {
    fn from(err: pest::error::Error<Rule>) -> Self {
        Error {
            message: err.to_string(),
        }
    }
}

impl de::Error for Error {
    fn custom<T: Display>(msg: T) -> Self {
        Error {
            message: msg.to_string(),
        }
    }
}

impl Display for Error {
    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
        formatter.write_str(&self.message)
    }
}

impl std::error::Error for Error {
    fn description(&self) -> &str {
        &self.message
    }
}