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use serde_repr::{Deserialize_repr, Serialize_repr};

/// Gateway opcodes.
#[derive(
    Clone, Copy, Debug, Deserialize_repr, Eq, Hash, PartialEq, PartialOrd, Ord, Serialize_repr,
)]
#[repr(u8)]
pub enum OpCode {
    /// An event was received.
    Event = 0,
    /// Fired periodically to keep connection alive.
    Heartbeat = 1,
    /// Start a new session.
    Identify = 2,
    /// Update the client's presence information.
    PresenceUpdate = 3,
    /// Join, leave or move between voice channels.
    VoiceStateUpdate = 4,
    /// Voice ping checking. This opcode is deprecated.
    VoiceServerPing = 5,
    /// Resume a previously disconnected session.
    Resume = 6,
    /// Received to indicate a reconnect is required.
    Reconnect = 7,
    /// Request a list of members for a guild.
    RequestGuildMembers = 8,
    /// Received when the session is invalidated.
    InvalidSession = 9,
    /// Received after connecting, contains heartbeat interval.
    Hello = 10,
    /// Received in response to a heartbeat.
    HeartbeatAck = 11,
}

#[cfg(test)]
mod tests {
    use super::OpCode;
    use serde_test::Token;

    #[test]
    fn test_variants() {
        serde_test::assert_tokens(&OpCode::Event, &[Token::U8(0)]);
        serde_test::assert_tokens(&OpCode::Heartbeat, &[Token::U8(1)]);
        serde_test::assert_tokens(&OpCode::Identify, &[Token::U8(2)]);
        serde_test::assert_tokens(&OpCode::PresenceUpdate, &[Token::U8(3)]);
        serde_test::assert_tokens(&OpCode::VoiceStateUpdate, &[Token::U8(4)]);
        serde_test::assert_tokens(&OpCode::VoiceServerPing, &[Token::U8(5)]);
        serde_test::assert_tokens(&OpCode::Resume, &[Token::U8(6)]);
        serde_test::assert_tokens(&OpCode::Reconnect, &[Token::U8(7)]);
        serde_test::assert_tokens(&OpCode::RequestGuildMembers, &[Token::U8(8)]);
        serde_test::assert_tokens(&OpCode::InvalidSession, &[Token::U8(9)]);
        serde_test::assert_tokens(&OpCode::Hello, &[Token::U8(10)]);
        serde_test::assert_tokens(&OpCode::HeartbeatAck, &[Token::U8(11)]);
    }
}