use crate::server::coretypes::{

    ServerVar, GameCfg, TeamInfo,

    HedgehogInfo, VoteType

};

use std::{ops, convert::From, iter::once};

#[derive(PartialEq, Eq, Clone, Debug)]

pub enum HWProtocolMessage {

    // core

    Ping,

    Pong,

    Quit(Option<String>),

    //Cmd(String, Vec<String>),

    Global(String),

    Watch(String),

    ToggleServerRegisteredOnly,

    SuperPower,

    Info(String),

    // not entered state

    Nick(String),

    Proto(u16),

    Password(String, String),

    Checker(u16, String, String),

    // lobby

    List,

    Chat(String),

    CreateRoom(String, Option<String>),

    JoinRoom(String, Option<String>),

    Follow(String),

    Rnd(Vec<String>),

    Kick(String),

    Ban(String, String, u32),

    BanIP(String, String, u32),

    BanNick(String, String, u32),

    BanList,

    Unban(String),

    SetServerVar(ServerVar),

    GetServerVar,

    RestartServer,

    Stats,

    // in room

    Part(Option<String>),

    Cfg(GameCfg),

    AddTeam(Box<TeamInfo>),

    RemoveTeam(String),

    SetHedgehogsNumber(String, u8),

    SetTeamColor(String, u8),

    ToggleReady,

    StartGame,

    EngineMessage(String),

    RoundFinished,

    ToggleRestrictJoin,

    ToggleRestrictTeams,

    ToggleRegisteredOnly,

    RoomName(String),

    Delegate(String),

    TeamChat(String),

    MaxTeams(u8),

    Fix,

    Unfix,

    Greeting(String),

    CallVote(Option<VoteType>),

    Vote(bool),

    ForceVote(bool),

    Save(String, String),

    Delete(String),

    SaveRoom(String),

    LoadRoom(String),

    Malformed,

    Empty,

}

#[derive(Debug)]

pub enum HWServerMessage {

    Ping,

    Pong,

    Bye(String),

    Nick(String),

    Proto(u16),

    ServerAuth(String),

    LobbyLeft(String, String),

    LobbyJoined(Vec<String>),

    ChatMsg {nick: String, msg: String},

    ClientFlags(String, Vec<String>),

    Rooms(Vec<String>),

    RoomAdd(Vec<String>),

    RoomJoined(Vec<String>),

    RoomLeft(String, String),

    RoomRemove(String),

    RoomUpdated(String, Vec<String>),

    TeamAdd(Vec<String>),

    TeamRemove(String),

    TeamAccepted(String),

    TeamColor(String, u8),

    HedgehogsNumber(String, u8),

    ConfigEntry(String, Vec<String>),

    Kicked,

    RunGame,

    ForwardEngineMessage(Vec<String>),

    RoundFinished,

    ServerMessage(String),

    Warning(String),

    Error(String),

    Connected(u32),

    Unreachable,

}

pub fn server_chat(msg: String) -> HWServerMessage  {

    HWServerMessage::ChatMsg{ nick: "[server]".to_string(), msg }

}

impl GameCfg {

    pub fn to_protocol(&self) -> (String, Vec<String>) {

        use crate::server::coretypes::GameCfg::*;

        match self {

            FeatureSize(s) => ("FEATURE_SIZE".to_string(), vec![s.to_string()]),

            MapType(t) => ("MAP".to_string(), vec![t.to_string()]),

            MapGenerator(g) => ("MAPGEN".to_string(), vec![g.to_string()]),

            MazeSize(s) => ("MAZE_SIZE".to_string(), vec![s.to_string()]),

            Seed(s) => ("SEED".to_string(), vec![s.to_string()]),

            Template(t) => ("TEMPLATE".to_string(), vec![t.to_string()]),

            Ammo(n, None) => ("AMMO".to_string(), vec![n.to_string()]),

            Ammo(n, Some(s)) => ("AMMO".to_string(), vec![n.to_string(), s.to_string()]),

                let mut v = vec![n.to_string()];

                v.extend(s.clone().into_iter());

                v

            }),

            Script(s) => ("SCRIPT".to_string(), vec![s.to_string()]),

            Theme(t) => ("THEME".to_string(), vec![t.to_string()]),

            DrawnMap(m) => ("DRAWNMAP".to_string(), vec![m.to_string()])

        }

    }

    pub fn to_server_msg(&self) -> HWServerMessage {

        use self::HWServerMessage::ConfigEntry;

        let (name, args) = self.to_protocol();

        HWServerMessage::ConfigEntry(name, args)

    }

}

macro_rules! const_braces {

    ($e: expr) => { "{}\n" }

}

macro_rules! msg {

    [$($part: expr),*] => {

        format!(concat!($(const_braces!($part)),*, "\n"), $($part),*);

    };

}

#[cfg(test)]

macro_rules! several {

    [$part: expr] => { once($part) };

    [$part: expr, $($other: expr),*] => { once($part).chain(several![$($other),*]) };

}

impl HWProtocolMessage {

    /** Converts the message to a raw `String`, which can be sent over the network.

     *

     * This is the inverse of the `message` parser.

     */

    #[cfg(test)]

    pub(crate) fn to_raw_protocol(&self) -> String {

        use self::HWProtocolMessage::*;

        match self {

            Ping => msg!["PING"],

            Pong => msg!["PONG"],

            Quit(None) => msg!["QUIT"],

            Quit(Some(msg)) => msg!["QUIT", msg],

            Global(msg) => msg!["CMD", format!("GLOBAL {}", msg)],

            Watch(name) => msg!["CMD", format!("WATCH {}", name)],

            ToggleServerRegisteredOnly => msg!["CMD", "REGISTERED_ONLY"],

            SuperPower =>  msg!["CMD", "SUPER_POWER"],

            Info(info) => msg!["CMD", format!("INFO {}", info)],

            Nick(nick) => msg!("NICK", nick),

            Proto(version) => msg!["PROTO", version],

            Password(p, s) => msg!["PASSWORD", p, s],

            Checker(i, n, p) => msg!["CHECKER", i, n, p],

            List => msg!["LIST"],

            Chat(msg) => msg!["CHAT", msg],

            CreateRoom(name, None) => msg!["CREATE_ROOM", name],

            CreateRoom(name, Some(password)) =>

                msg!["CREATE_ROOM", name, password],

            JoinRoom(name, None) => msg!["JOIN_ROOM", name],

            JoinRoom(name, Some(password)) =>

                msg!["JOIN_ROOM", name, password],

            Follow(name) => msg!["FOLLOW", name],

            Rnd(args) => if args.is_empty() {

                msg!["CMD", "RND"]

            } else {

                msg!["CMD", format!("RND {}", args.join(" "))]

            },

            Kick(name) => msg!["KICK", name],

            Ban(name, reason, time) => msg!["BAN", name, reason, time],

            BanIP(ip, reason, time) => msg!["BAN_IP", ip, reason, time],

            BanNick(nick, reason, time) =>

                msg!("BAN_NICK", nick, reason, time),

            BanList => msg!["BANLIST"],

            Unban(name) => msg!["UNBAN", name],

            //SetServerVar(ServerVar), ???

            GetServerVar => msg!["GET_SERVER_VAR"],

            RestartServer => msg!["CMD", "RESTART_SERVER YES"],

            Stats => msg!["CMD", "STATS"],

            Part(None) => msg!["PART"],

            Part(Some(msg)) => msg!["PART", msg],

            Cfg(config) => {

                let (name, args) = config.to_protocol();

                msg!["CFG", name, args.join("\n")]

            },

            AddTeam(info) =>

                msg!["ADD_TEAM", info.name, info.color, info.grave, info.fort,

                     info.voice_pack, info.flag, info.difficulty,

                     info.hedgehogs.iter()

                        .flat_map(|h| several![&h.name[..], &h.hat[..]])

                        .collect::<Vec<_>>().join("\n")],

            RemoveTeam(name) => msg!["REMOVE_TEAM", name],

            SetHedgehogsNumber(team, number) => msg!["HH_NUM", team, number],

            SetTeamColor(team, color) => msg!["TEAM_COLOR", team, color],

            ToggleReady => msg!["TOGGLE_READY"],

            StartGame => msg!["START_GAME"],

            EngineMessage(msg) => msg!["EM", msg],

            RoundFinished => msg!["ROUNDFINISHED"],

            ToggleRestrictJoin => msg!["TOGGLE_RESTRICT_JOINS"],

            ToggleRestrictTeams => msg!["TOGGLE_RESTRICT_TEAMS"],

            ToggleRegisteredOnly => msg!["TOGGLE_REGISTERED_ONLY"],

            RoomName(name) => msg!["ROOM_NAME", name],

            Delegate(name) => msg!["CMD", format!("DELEGATE {}", name)],

            TeamChat(msg) => msg!["TEAMCHAT", msg],

            MaxTeams(count) => msg!["CMD", format!("MAXTEAMS {}", count)] ,

            Fix => msg!["CMD", "FIX"],

            Unfix => msg!["CMD", "UNFIX"],

            Greeting(msg) => msg!["CMD", format!("GREETING {}", msg)],

            //CallVote(Option<(String, Option<String>)>) =>, ??

            Vote(msg) => msg!["CMD", format!("VOTE {}", if *msg {"YES"} else {"NO"})],

            ForceVote(msg) => msg!["CMD", format!("FORCE {}", if *msg {"YES"} else {"NO"})],

            Save(name, location) => msg!["CMD", format!("SAVE {} {}", name, location)],

            Delete(name) => msg!["CMD", format!("DELETE {}", name)],

            SaveRoom(name) => msg!["CMD", format!("SAVEROOM {}", name)],

            LoadRoom(name) => msg!["CMD", format!("LOADROOM {}", name)],

            Malformed => msg!["A", "QUICK", "BROWN", "HOG", "JUMPS", "OVER", "THE", "LAZY", "DOG"],

            Empty => msg![""],

            _ => panic!("Protocol message not yet implemented")

        }

    }

}

fn construct_message(header: &[&str], msg: &[String]) -> String {

    let mut v: Vec<_> = header.iter().map(|s| *s).collect();

    v.extend(msg.iter().map(|s| &s[..]));

    v.push("\n");

    v.join("\n")

}

impl HWServerMessage {

    pub fn to_raw_protocol(&self) -> String {

        use self::HWServerMessage::*;

        match self {

            Ping => msg!["PING"],

            Pong => msg!["PONG"],

            Connected(protocol_version) => msg![

                "CONNECTED",

                "Hedgewars server https://www.hedgewars.org/",

                protocol_version],

            Bye(msg) => msg!["BYE", msg],

            Nick(nick) => msg!["NICK", nick],

            Proto(proto) => msg!["PROTO", proto],

            ServerAuth(hash) => msg!["SERVER_AUTH", hash],

            LobbyLeft(nick, msg) => msg!["LOBBY:LEFT", nick, msg],

            LobbyJoined(nicks) =>

                construct_message(&["LOBBY:JOINED"], &nicks),

            ClientFlags(flags, nicks) =>

                construct_message(&["CLIENT_FLAGS", flags], &nicks),

            Rooms(info) =>

                construct_message(&["ROOMS"], &info),

            RoomAdd(info) =>

                construct_message(&["ROOM", "ADD"], &info),

            RoomJoined(nicks) =>

                construct_message(&["JOINED"], &nicks),

            RoomLeft(nick, msg) => msg!["LEFT", nick, msg],

            RoomRemove(name) => msg!["ROOM", "DEL", name],

            RoomUpdated(name, info) =>

                construct_message(&["ROOM", "UPD", name], &info),

            TeamAdd(info) =>

                construct_message(&["ADD_TEAM"], &info),

            TeamRemove(name) => msg!["REMOVE_TEAM", name],

            TeamAccepted(name) => msg!["TEAM_ACCEPTED", name],

            TeamColor(name, color) => msg!["TEAM_COLOR", name, color],

            HedgehogsNumber(name, number) => msg!["HH_NUM", name, number],

            ConfigEntry(name, values) =>

                construct_message(&["CFG", name], &values),

            Kicked => msg!["KICKED"],

            RunGame => msg!["RUN_GAME"],

            ForwardEngineMessage(em) =>

                construct_message(&["EM"], &em),

            RoundFinished => msg!["ROUND_FINISHED"],

            ChatMsg {nick, msg} => msg!["CHAT", nick, msg],

            ServerMessage(msg) => msg!["SERVER_MESSAGE", msg],

            Warning(msg) => msg!["WARNING", msg],

            Error(msg) => msg!["ERROR", msg],

            _ => msg!["ERROR", "UNIMPLEMENTED"],

        }

    }

}