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pub mod codec;
pub mod frame;

#[macro_use]
extern crate lazy_static;

pub type Error = Box<dyn std::error::Error + Send + Sync>;

pub type Result<T> = std::result::Result<T, Error>;

#[cfg(test)]
mod tests {
    use super::*;
    use bytes::{Buf, BufMut, BytesMut};
    use codec::AMQPCodec;
    use frame::{AMQPFrame, AMQPValue, MethodFrame};
    use tokio_util::codec::Encoder;

    #[test]
    fn encode_header_frame() {
        let mut encoder = AMQPCodec{};
        let mut buf = BytesMut::with_capacity(1024);

        let res = encoder.encode(AMQPFrame::AMQPHeader, &mut buf);

        assert!(res.is_ok());

        let expected = b"AMQP\x00\x00\x09\x01";
        let mut current = [0u8; 8];

        buf.copy_to_slice(&mut current[..]);

        assert_eq!(expected, &current);
    }

    #[test]
    fn encode_method_frame() {
        let mut encoder = AMQPCodec{};
        let mut buf = BytesMut::with_capacity(1024);

        let args = vec![
            AMQPValue::U8(0x9A),
            AMQPValue::U16(0x1122),
            AMQPValue::U32(0x55667788),
            AMQPValue::SimpleString("test".into()),
            AMQPValue::LongString("longtest".into())
        ];
        let res = encoder.encode(AMQPFrame::Method(Box::new(MethodFrame {
            channel: 0x0205,
            class_method: 0x00FF00FE,
            args: args
        })) , &mut buf);

        assert!(res.is_ok());

        let frame_header = b"\x01\x02\x05";
        let class_method = b"\x00\xFF\x00\xFE";

        let mut argbuf = BytesMut::with_capacity(256);
        argbuf.put(&class_method[..]);
        argbuf.put(&b"\x9A"[..]);
        argbuf.put(&b"\x11\x22"[..]);
        argbuf.put(&b"\x55\x66\x77\x88"[..]);
        argbuf.put(&b"\x04test"[..]);
        argbuf.put(&b"\x00\x00\x00\x08longtest"[..]);

        let mut expected = BytesMut::with_capacity(256);
        expected.put(&frame_header[..]);
        expected.put_u32(argbuf.len() as u32);
        expected.put(argbuf);
        expected.put_u8(0xCE);

        assert_eq!(expected, buf);
    }
}