pub mod api;
pub mod http;

use serde_json;
use std;
use std::fmt;

#[derive(Debug)]
pub enum Error {
	Api(api::Api),
	Http,
	Json(serde_json::Error),
	Unknown,
}

impl Error {
	pub fn is_api_error(self) -> bool {
		match self {
			Error::Api(_) => true,
			Error::Json(_) => false,
			Error::Http => false,
			_ => false,
		}
	}

	pub fn is_http_err(self) -> bool {
		match self {
			Error::Api(_) => false,
			Error::Json(_) => false,
			Error::Http => true,
			_ => false,
		}
	}

	pub fn is_json_error(self) -> bool {
		match self {
			Error::Api(_) => false,
			Error::Json(_) => true,
			Error::Http => false,
			_ => false,
		}
	}
}

impl fmt::Display for Error {
	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
		match *self {
			Error::Api(ref e) => e.fmt(f),
			Error::Http => write!(f, "HTTP"),
			Error::Json(_) => write!(f, "Json"),
			Error::Unknown => write!(f, "Unknown"),
		}
	}
}

impl std::error::Error for Error {
	fn description(&self) -> &str {
		match *self {
			Error::Api(_) => "API error",
			Error::Http => "a connection error",
			Error::Json(_) => "Json error",
			Error::Unknown => "an unknown error",
		}
	}
}