use super::{

    client::HWClient,

    core::HWServer,

    coretypes::{ClientId, GameCfg, RoomId, VoteType},

    handlers,

    room::HWRoom,

    room::{GameInfo, RoomFlags},

};

use crate::{

    protocol::messages::{server_chat, HWProtocolMessage, HWServerMessage, HWServerMessage::*},

    utils::to_engine_msg,

};

use rand::{distributions::Uniform, thread_rng, Rng};

use std::{io, io::Write, iter::once, mem::replace};

#[cfg(feature = "official-server")]

use super::database;

pub enum Destination {

    ToId(ClientId),

    ToSelf,

    ToAll {

        room_id: Option<RoomId>,

        protocol: Option<u16>,

        skip_self: bool,

    },

}

pub struct PendingMessage {

    pub destination: Destination,

    pub message: HWServerMessage,

}

impl PendingMessage {

    pub fn send(message: HWServerMessage, client_id: ClientId) -> PendingMessage {

        PendingMessage {

            destination: Destination::ToId(client_id),

            message,

        }

    }

    pub fn send_self(message: HWServerMessage) -> PendingMessage {

        PendingMessage {

            destination: Destination::ToSelf,

            message,

        }

    }

    pub fn send_all(message: HWServerMessage) -> PendingMessage {

        let destination = Destination::ToAll {

            room_id: None,

            protocol: None,

            skip_self: false,

        };

        PendingMessage {

            destination,

            message,

        }

    }

    pub fn in_room(mut self, clients_room_id: RoomId) -> PendingMessage {

        if let Destination::ToAll {

            ref mut room_id, ..

        } = self.destination

        {

            *room_id = Some(clients_room_id)

        }

        self

    }

    pub fn with_protocol(mut self, protocol_number: u16) -> PendingMessage {

        if let Destination::ToAll {

            ref mut protocol, ..

        } = self.destination

        {

            *protocol = Some(protocol_number)

        }

        self

    }

    pub fn but_self(mut self) -> PendingMessage {

        if let Destination::ToAll {

            ref mut skip_self, ..

        } = self.destination

        {

            *skip_self = true

        }

        self

    }

}

impl HWServerMessage {

    pub fn send(self, client_id: ClientId) -> PendingMessage {

        PendingMessage::send(self, client_id)

    }

    pub fn send_self(self) -> PendingMessage {

        PendingMessage::send_self(self)

    }

    pub fn send_all(self) -> PendingMessage {

        PendingMessage::send_all(self)

    }

}