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use rusoto_core::RusotoError;
use rusoto_s3::*;
use snafu::{Backtrace, Snafu};
use std::io;

#[derive(Snafu, Debug)]
#[snafu(visibility = "pub")]
pub enum Error {
    #[snafu(display("Io error: {}: {}", description, source))]
    Io {
        source: io::Error,
        description: String,
        backtrace: Backtrace,
    },
    /// Error originating from tokio::Delay
    #[snafu(display("Tokio timer error: {}", source))]
    Delay {
        source: tokio::time::error::Error,
        backtrace: Backtrace,
    },
    #[snafu(display("S3 'put object' error on key '{}': {}", key, source))]
    PutObject {
        source: RusotoError<PutObjectError>,
        key: String,
        backtrace: Backtrace,
    },
    #[snafu(display("S3 operation timed out"))]
    Timeout {
        source: tokio::time::error::Elapsed,
    },
    #[snafu(display("Error listing objects in S3: {:?}", source))]
    ListObjectsV2 {
        source: RusotoError<ListObjectsV2Error>,
    },
    #[snafu(display("Error deleting objects in S3: {:?}", source))]
    DeleteObjects {
        source: RusotoError<DeleteObjectsError>,
    },
    DeleteObject {
        source: RusotoError<DeleteObjectError>,
    },
    CopyObject {
        source: RusotoError<CopyObjectError>,
    },
    GetObject {
        source: RusotoError<GetObjectError>,
    },
    #[snafu(display("IO error: {}", source))]
    TokioIo {
        source: tokio::io::Error,
    },
    AnyError {
        source: Box<dyn std::error::Error + Send + Sync>,
    },
}

impl<T> From<RusotoError<T>> for Error
where
    T: std::error::Error + Send + Sync + 'static,
{
    fn from(err: RusotoError<T>) -> Self {
        Self::AnyError {
            source: Box::new(err),
        }
    }
}

#[cfg(test)]
mod test {
    use super::*;
    use snafu::GenerateBacktrace;
    #[test]
    fn error_traits() {
        fn foo<T: Send>(_: T) {}
        foo(Error::Io {
            source: io::Error::from_raw_os_error(1),
            description: "hello".into(),
            backtrace: Backtrace::generate(),
        });
    }
}