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use std::{error, fmt, io};

#[derive(Debug)]
pub enum Error {
    Io(io::Error),
    Csv(csv::Error),
    ChronoParse(chrono::format::ParseError),
    SerdeJson(serde_json::error::Error),
    TemplateError(handlebars::TemplateError),
    TemplateRenderError(handlebars::TemplateRenderError),
    RenderError(handlebars::RenderError),
    Utf8(std::string::FromUtf8Error),
    StringError(String),
}

impl error::Error for Error {
    fn cause(&self) -> Option<&dyn error::Error> {
        match *self {
            Error::Io(ref err) => Some(err),
            Error::Csv(ref err) => Some(err),
            Error::ChronoParse(ref err) => Some(err),
            Error::SerdeJson(ref err) => Some(err),
            Error::TemplateError(ref err) => Some(err),
            Error::TemplateRenderError(ref err) => Some(err),
            Error::RenderError(ref err) => Some(err),
            Error::Utf8(ref err) => Some(err),
            Error::StringError(_) => None,
        }
    }
}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match *self {
            Error::Io(ref err) => err.fmt(f),
            Error::Csv(ref err) => err.fmt(f),
            Error::ChronoParse(ref err) => err.fmt(f),
            Error::SerdeJson(ref err) => err.fmt(f),
            Error::TemplateError(ref err) => err.fmt(f),
            Error::TemplateRenderError(ref err) => err.fmt(f),
            Error::RenderError(ref err) => err.fmt(f),
            Error::Utf8(ref err) => err.fmt(f),
            Error::StringError(ref s) => f.write_str(s),
        }
    }
}

impl From<std::string::FromUtf8Error> for Error {
    fn from(err: std::string::FromUtf8Error) -> Error {
        Error::Utf8(err)
    }
}

impl From<handlebars::RenderError> for Error {
    fn from(err: handlebars::RenderError) -> Error {
        Error::RenderError(err)
    }
}

impl From<handlebars::TemplateRenderError> for Error {
    fn from(err: handlebars::TemplateRenderError) -> Error {
        Error::TemplateRenderError(err)
    }
}

impl From<handlebars::TemplateError> for Error {
    fn from(err: handlebars::TemplateError) -> Error {
        Error::TemplateError(err)
    }
}

impl From<io::Error> for Error {
    fn from(err: io::Error) -> Error {
        Error::Io(err)
    }
}

impl From<csv::Error> for Error {
    fn from(err: csv::Error) -> Error {
        Error::Csv(err)
    }
}

impl From<serde_json::error::Error> for Error {
    fn from(err: serde_json::error::Error) -> Error {
        Error::SerdeJson(err)
    }
}

impl From<chrono::format::ParseError> for Error {
    fn from(err: chrono::format::ParseError) -> Error {
        Error::ChronoParse(err)
    }
}