//! General errors

#![allow(dead_code)]

use std::fmt;

/// Possible runner errors.
#[derive(Debug)]
pub enum Error {
    CannotCreateWindow(String),
    CannotCreateStore(String),
    DemoInitializationFailure(String),
}

impl Error {
    pub fn cannot_create_window<R>(reason: R) -> Self
    where
        R: Into<String>,
    {
        Error::CannotCreateWindow(reason.into())
    }

    pub fn cannot_create_store<R>(reason: R) -> Self
    where
        R: Into<String>,
    {
        Error::CannotCreateStore(reason.into())
    }

    pub fn app_initialization_failure<R>(reason: R) -> Self
    where
        R: Into<String>,
    {
        Error::DemoInitializationFailure(reason.into())
    }
}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
        match *self {
            Error::CannotCreateWindow(ref reason) => write!(f, "cannot create window: {}", reason),
            Error::CannotCreateStore(ref reason) => write!(f, "cannot create store: {}", reason),
            Error::DemoInitializationFailure(ref reason) => {
                write!(f, "app failed to initialize: {}", reason)
            }
        }
    }
}