use libpso::packet::ship::*;
use crate::common::serverstate::ClientId;
use crate::common::leveltable::LEVEL_TABLE;
use crate::ship::ship::{SendShipPacket, ShipError, Clients, ShipEvent};
use crate::ship::room::Rooms;
use crate::ship::character::{FullCharacterBytesBuilder};
use crate::ship::location::{ClientLocation, LobbyId, RoomLobby, ClientLocationError, RoomId};
use crate::ship::packet;
use crate::ship::items::state::ItemState;
use crate::entity::gateway::EntityGateway;
use crate::entity::room::RoomNote;
use crate::ship::map::MapArea;
use futures::future::join_all;

// this function needs a better home
pub async fn block_selected(id: ClientId,
                            pkt: MenuSelect,
                            clients: &Clients,
                            item_state: &ItemState)
                            -> Result<Vec<(ClientId, SendShipPacket)>, anyhow::Error> {
    clients.with_mut(id, |client| {
        let item_state = item_state.clone();
        Box::pin(async move {
            client.block = pkt.item as usize - 1;

            let (level, stats) = LEVEL_TABLE.get_stats_from_exp(client.character.char_class, client.character.exp);

            let inventory = item_state.get_character_inventory(&client.character).await?;
            let bank = item_state.get_character_bank(&client.character).await?;

            let fc = FullCharacterBytesBuilder::default()
                .character(&client.character)
                .stats(&stats)
                .level(level)
                .meseta(inventory.meseta)
                .inventory(&inventory)
                .bank(&bank)
                .keyboard_config(&client.settings.settings.keyboard_config)
                .gamepad_config(&client.settings.settings.gamepad_config)
                .symbol_chat(&client.settings.settings.symbol_chats)
                .tech_menu(&client.character.tech_menu.as_bytes())
                .option_flags(client.character.option_flags)
                .build();

            Ok(vec![
                (id, SendShipPacket::FullCharacter(Box::new(FullCharacter {
                    character: fc,
                }))),
                (id, SendShipPacket::CharDataRequest(CharDataRequest {})),
                (id, SendShipPacket::LobbyList(LobbyList::new())),
            ])
        })}).await?
}

pub async fn send_player_to_lobby(id: ClientId,
                                  _pkt: CharData,
                                  client_location: &mut ClientLocation,
                                  clients: &Clients,
                                  item_state: &ItemState,
                                  event: ShipEvent)
                                  -> Result<Vec<(ClientId, SendShipPacket)>, anyhow::Error> {
    let lobby = client_location.add_client_to_next_available_lobby(id, LobbyId(0)).await.map_err(|_| ShipError::TooManyClients)?;
    let join_lobby = packet::builder::lobby::join_lobby(id, lobby, client_location, clients, item_state, event).await?;
    let addto = packet::builder::lobby::add_to_lobby(id, lobby, client_location, clients, item_state, event).await?;
    let neighbors = client_location.get_client_neighbors(id).await.unwrap();
    Ok(vec![(id, SendShipPacket::JoinLobby(join_lobby))]
       .into_iter()
       .chain(neighbors.into_iter()
              .map(|c| (c.client, SendShipPacket::AddToLobby(addto.clone())))).collect())
}

#[allow(clippy::too_many_arguments)]
pub async fn change_lobby<EG>(id: ClientId,
                              requested_lobby: u32,
                              client_location: &mut ClientLocation,
                              clients: &Clients,
                              item_state: &mut ItemState,
                              rooms: &Rooms,
                              entity_gateway: &mut EG,
                              event: ShipEvent)
                              -> Result<Vec<(ClientId, SendShipPacket)>, anyhow::Error>
where
    EG: EntityGateway + Clone + 'static,
{
    let prev_area = client_location.get_area(id).await.map_err(|err| -> ClientLocationError {err.into()})?;
    match prev_area {
        RoomLobby::Lobby(old_lobby) => {
            if old_lobby.0 == requested_lobby as usize {
                return Ok(vec![(id, SendShipPacket::SmallDialog(SmallDialog::new("You are already in this Lobby!".into())))])
            }
        },
        RoomLobby::Room(old_room) => {
            let room_entity_id = rooms.with(old_room, |room| Box::pin(async {
                room.room_id
            })).await?;
            if client_location.get_client_neighbors(id).await?.is_empty() {
                rooms.remove(old_room).await;
            }

            let character_id = clients.with(id, |client| Box::pin(async {
                client.character.id
            })).await?;
            clients.with(id, |client| {
                let mut item_state = item_state.clone();
                let mut entity_gateway = entity_gateway.clone();
                Box::pin(async move {
                    item_state.remove_character_from_room(&client.character).await;
                    entity_gateway.add_room_note(room_entity_id, RoomNote::PlayerLeave {
                        character_id
                    }).await
                })}).await??;
        },
    }
    let leave_lobby = packet::builder::lobby::remove_from_lobby(id, client_location).await?;
    let old_neighbors = client_location.get_client_neighbors(id).await.unwrap();
    let mut lobby = LobbyId(requested_lobby as usize);
    if client_location.add_client_to_lobby(id, lobby).await.is_err() {
        match prev_area {
            RoomLobby::Lobby(_lobby) => {
                let dialog = SmallDialog::new(String::from("Lobby is full."));
                return Ok(vec![(id, SendShipPacket::SmallDialog(dialog))])
            }
            RoomLobby::Room(_room) => {
                lobby = client_location.add_client_to_next_available_lobby(id, lobby).await.map_err(|_| ShipError::TooManyClients)?;
            }
        }
    }
    clients.with(id, |client| {
        let mut entity_gateway = entity_gateway.clone();
        let mut item_state = item_state.clone();
        Box::pin(async move {
            item_state.load_character(&mut entity_gateway, &client.character).await
        })}).await??;
    let join_lobby = packet::builder::lobby::join_lobby(id, lobby, client_location, clients, item_state, event).await?;
    let addto = packet::builder::lobby::add_to_lobby(id, lobby, client_location, clients, item_state, event).await?;
    let neighbors = client_location.get_client_neighbors(id).await?;
    Ok(vec![(id, SendShipPacket::JoinLobby(join_lobby))]
       .into_iter()
       .chain(neighbors.into_iter()
              .map(|c| (c.client, SendShipPacket::AddToLobby(addto.clone()))))
       .chain(old_neighbors.into_iter()
              .map(|c| (c.client, SendShipPacket::LeaveLobby(leave_lobby.clone()))))
       .chain(std::iter::once((id, SendShipPacket::LobbyEvent(LobbyEvent{ event: event.into()}))))
       .collect())
}

pub async fn remove_from_lobby(id: ClientId,
                               client_location: &mut ClientLocation)
                               -> Result<Vec<(ClientId, SendShipPacket)>, anyhow::Error> {
    let area_client = client_location.get_local_client(id).await?;
    let neighbors = client_location.get_client_neighbors(id).await?;
    let leader = client_location.get_leader_by_client(id).await.map_err(|err| -> ClientLocationError { err.into() })?;
    let leave_lobby_pkt = SendShipPacket::LeaveLobby(LeaveLobby::new(area_client.local_client.id(), leader.local_client.id()));

    client_location.remove_client_from_area(id).await.map_err(|err| -> ClientLocationError { err.into() })?;
    Ok(neighbors.into_iter().map(|n| {
        (n.client, leave_lobby_pkt.clone())
    }).collect())
}

pub async fn get_room_tab_info(id: ClientId,
                               pkt: MenuDetail,
                               client_location: &mut ClientLocation,
                               clients: &Clients)
                               -> Result<Vec<(ClientId, SendShipPacket)>, anyhow::Error> {
    let room_id = RoomId(pkt.item as usize);
    let clients_in_room = client_location.get_clients_in_room(room_id).await.map_err(|err| -> ClientLocationError { err.into() })?;
    let room_info = if clients_in_room.is_empty() {
        String::from("Game is no longer active")
    }
    else {
        join_all(clients_in_room.iter()
                 .map(|clientl| async move {
                     clients.with(clientl.client, |client| Box::pin(async move {
                         format!("{} Lv{} {}\n{} {}",
                                 client.character.name,
                                 LEVEL_TABLE.get_level_from_exp(client.character.char_class, client.character.exp),
                                 client.user.guildcard,
                                 client.character.char_class,
                                 client.area.unwrap_or(MapArea::Pioneer2Ep1))
                     })).await
                 })).await
            .into_iter()
            .collect::<Result<Vec<_>, anyhow::Error>>()?
            .join("\n")
    };
    Ok(vec![(id, SendShipPacket::SmallLeftDialog(SmallLeftDialog::new(room_info)))])
}