use serde::{Deserialize, Serialize};

pub const PROTOCOL_VERSION: u32 = 1;

#[derive(Serialize, Deserialize, Debug, Clone, Copy)]
pub enum State {
    Handshake,
    Play
}

#[derive(Serialize, Deserialize, Debug, Clone)]
pub enum MessageC2S {
    Hello {
        version: u32,
        requested_username: String,
        next_state: State
    },

    Goodbye {
        reason: GoodbyeReason
    },

    Chat {
        message: String
    }
}

#[derive(Serialize, Deserialize, Debug, Clone)]
pub enum MessageS2C {
    Hello {
        version: u32,
        given_username: String,
        next_state: State
    },

    Goodbye {
        reason: GoodbyeReason
    },

    Chat {
        from: String,
        message: String
    }
}

#[derive(Serialize, Deserialize, Debug, Clone)]
pub enum GoodbyeReason {
    UnsupportedProtocol { supported: u32, got: u32 },
    UnexpectedPacket,
    UnexpectedNextState,
    UsernameTaken,
    Done
}

pub fn pc2s(pkt: &MessageC2S) -> Vec<u8> {
    rmp_serde::to_vec(pkt).unwrap()
}
pub fn ps2c(pkt: &MessageS2C) -> Vec<u8> {
    rmp_serde::to_vec(pkt).unwrap()
}