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/// Error for API calls from [`Client`](super::Client).
#[derive(Debug)]
pub enum Error {
    /// Wrong api key or your account is suspended.
    AuthenticationError,
    /// Fail to connect to API servers.
    ApiConnectionError,
    /// Something wrong on your end (client side errors), e.g., missing required parameters.
    InvalidRequestError,
    /// You are using FREE plan and you exceed the quota limit.
    RateLimitError,
    /// Endpoint not exist, or podcast / episode not exist.
    NotFoundError,
    /// Something wrong on our end (unexpected server errors).
    ListenApiError,
    /// Error from http client.
    Reqwest(reqwest::Error),
    /// Error from JSON creation/processing.
    Json(serde_json::Error),
}

impl From<reqwest::Error> for Error {
    fn from(e: reqwest::Error) -> Error {
        Error::Reqwest(e)
    }
}

impl From<serde_json::Error> for Error {
    fn from(e: serde_json::Error) -> Error {
        Error::Json(e)
    }
}

impl std::error::Error for Error {
    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
        match *self {
            Error::Reqwest(ref e) => Some(e),
            Error::Json(ref e) => Some(e),
            _ => None,
        }
    }
}

impl std::fmt::Display for Error {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        match self {
            Error::AuthenticationError => {
                write!(f, "Wrong api key or your account is suspended.")
            }
            Error::ApiConnectionError => {
                write!(f, "Fail to connect to API servers.")
            }
            Error::InvalidRequestError => {
                write!(
                    f,
                    "Something wrong on your end (client side errors), e.g., missing required parameters."
                )
            }
            Error::RateLimitError => {
                write!(f, "You are using FREE plan and you exceed the quota limit.")
            }
            Error::NotFoundError => {
                write!(f, "Endpoint not exist, or podcast / episode not exist.")
            }
            Error::ListenApiError => {
                write!(f, "Something wrong on our end (unexpected server errors).")
            }
            Error::Reqwest(_) | Error::Json(_) => {
                write!(f, "{}", self)
            }
        }
    }
}