use std::iter;

use server::{

    coretypes::{TeamInfo, GameCfg},

    client::{ClientId, HWClient}

};

const MAX_HEDGEHOGS_IN_ROOM: u8 = 48;

pub type RoomId = usize;

pub struct HWRoom {

    pub id: RoomId,

    pub master_id: Option<ClientId>,

    pub name: String,

    pub password: Option<String>,

    pub protocol_number: u32,

    pub players_number: u32,

    pub default_hedgehog_number: u8,

    pub team_limit: u8,

    pub ready_players_number: u8,

    pub teams: Vec<(ClientId, TeamInfo)>,

    pub game_info: Option<()>

}

impl HWRoom {

    pub fn new(id: RoomId) -> HWRoom {

        HWRoom {

            id,

            master_id: None,

            name: String::new(),

            password: None,

            protocol_number: 0,

            players_number: 0,

            default_hedgehog_number: 4,

            team_limit: 8,

            ready_players_number: 0,

            teams: Vec::new(),

            game_info: None

        }

    }

    pub fn hedgehogs_number(&self) -> u8 {

        self.teams.iter().map(|(_, t)| t.hedgehogs_number).sum()

    }

    pub fn addable_hedgehogs(&self) -> u8 {

        MAX_HEDGEHOGS_IN_ROOM - self.hedgehogs_number()

    }

    pub fn add_team(&mut self, owner_id: ClientId, mut team: TeamInfo) -> &TeamInfo {

        team.color = iter::repeat(()).enumerate()

            .map(|(i, _)| i as u8).take(u8::max_value() as usize + 1)

            .find(|i| self.teams.iter().all(|(_, t)| t.color != *i ))

            .unwrap_or(0u8);

        team.hedgehogs_number = if self.teams.is_empty() {

            self.default_hedgehog_number

        } else {

            self.teams[0].1.hedgehogs_number.min(self.addable_hedgehogs())

        };

        self.teams.push((owner_id, team));

        &self.teams.last().unwrap().1

    }

    pub fn remove_team(&mut self, name: &str) {

        if let Some(index) = self.teams.iter().position(|(_, t)| t.name == name) {

            self.teams.remove(index);

        }

    }

    pub fn find_team_and_owner_mut<F>(&mut self, f: F) -> Option<(ClientId, &mut TeamInfo)>

        where F: Fn(&TeamInfo) -> bool {

        self.teams.iter_mut().find(|(_, t)| f(t)).map(|(id, t)| (*id, t))

    }

    pub fn find_team<F>(&self, f: F) -> Option<&TeamInfo>

        where F: Fn(&TeamInfo) -> bool {

        self.teams.iter().map(|(_, t)| t).find(|t| f(*t))

    }

    pub fn client_teams(&self, client_id: ClientId) -> impl Iterator<Item = &TeamInfo> {

        self.teams.iter().filter(move |(id, _)| *id == client_id).map(|(_, t)| t)

    }

    pub fn find_team_owner(&self, team_name: &str) -> Option<(ClientId, &str)> {

        self.teams.iter().find(|(_, t)| t.name == team_name)

            .map(|(id, t)| (*id, &t.name[..]))

    }

    pub fn find_team_color(&self, owner_id: ClientId) -> Option<u8> {

        self.client_teams(owner_id).nth(0).map(|t| t.color)

    }

    pub fn info(&self, master: Option<&HWClient>) -> Vec<String> {

        let flags = "-".to_string();

        vec![

            flags,

            self.name.clone(),

            self.players_number.to_string(),

            self.teams.len().to_string(),

            master.map_or("?", |c| &c.nick).to_string(),

            "Normal".to_string(),

            "Default".to_string(),

            "Default".to_string(),

            "Default".to_string(),

        ]

    }

    pub fn team_info(owner: &HWClient, team: &TeamInfo) -> Vec<String> {

        let mut info = vec![

            team.name.clone(),

            team.grave.clone(),

            team.fort.clone(),

            team.voice_pack.clone(),

            team.flag.clone(),

            owner.nick.clone(),

            team.difficulty.to_string()];

        let hogs = team.hedgehogs.iter().flat_map(|h|

            iter::once(h.name.clone()).chain(iter::once(h.hat.clone())));

        info.extend(hogs);

        info

    }

}