#![allow(dead_code, unused_assignments)]
use std::io::Read;
use std::collections::{BTreeMap, BTreeSet, HashMap};

use async_std::sync::{Arc, RwLock};
use async_std::channel;

use rand::Rng;
use crc::{crc32, Hasher32};

use libpso::packet::login::*;
use libpso::packet::ship::{MenuDetail, SmallLeftDialog};
use libpso::{PacketParseError, PSOPacket};
use libpso::crypto::bb::PSOBBCipher;
use libpso::character::character;
use entity::item;

use networking::cipherkeys::{ELSEWHERE_PRIVATE_KEY, ELSEWHERE_PARRAY};
use networking::serverstate::{SendServerPacket, RecvServerPacket, ServerState, OnConnect, ClientId};
use networking::interserver::{ServerId, InterserverActor, LoginMessage, ShipMessage, Ship};
use stats::leveltable::LEVEL_TABLE;
use libpso::{utf8_to_array, utf8_to_utf16_array};

use entity::gateway::{EntityGateway, GatewayError};
use entity::account::{UserAccountId, UserAccountEntity, NewUserSettingsEntity, USERFLAG_NEWCHAR, USERFLAG_DRESSINGROOM};
use entity::item::{NewItemEntity, ItemDetail, ItemNote, InventoryItemEntity, InventoryEntity, BankEntity, BankIdentifier, EquippedEntity, Meseta};
use entity::item::weapon::Weapon;
use entity::item::armor::Armor;
use entity::item::tech::Technique;
use entity::item::tool::Tool;
use entity::item::mag::Mag;
use entity::character::{CharacterEntity, NewCharacterEntity, CharacterClass, TechLevel};

use crate::login::login::{get_login_status};
use networking::interserver::AuthToken;

use pktbuilder::ship::SHIP_MENU_ID;

pub const CHARACTER_PORT: u16 = 12001;

#[derive(thiserror::Error, Debug)]
pub enum CharacterError {
    #[error("invalid menu selection {0} {1}")]
    InvalidMenuSelection(u32, u32),
    #[error("client not found {0}")]
    ClientNotFound(ClientId),
    #[error("could not load settings {0}")]
    CouldNotLoadSettings(GatewayError),
    #[error("could not load characters")]
    CouldNotLoadCharacters,
    #[error("could not load guildcard")]
    CouldNotLoadGuildcard,
    #[error("gateway error {0}")]
    GatewayError(#[from] GatewayError),
}

#[derive(Debug)]
pub enum RecvCharacterPacket {
    Login(Login),
    RequestSettings(RequestSettings),
    CharSelect(CharSelect),
    Checksum(Checksum),
    GuildcardDataRequest(GuildcardDataRequest),
    GuildcardDataChunkRequest(GuildcardDataChunkRequest),
    ParamDataRequest(ParamDataRequest),
    ParamDataChunkRequest(ParamDataChunkRequest),
    CharacterPreview(CharacterPreview),
    SetFlag(SetFlag),
    MenuSelect(MenuSelect),
    MenuDetail(MenuDetail),
}

impl RecvServerPacket for RecvCharacterPacket {
    fn from_bytes(data: &[u8]) -> Result<RecvCharacterPacket, PacketParseError> {
        match u16::from_le_bytes([data[2], data[3]]) {
            0x93 => Ok(RecvCharacterPacket::Login(Login::from_bytes(data)?)),
            0xE0 => Ok(RecvCharacterPacket::RequestSettings(RequestSettings::from_bytes(data)?)),
            0xE3 => Ok(RecvCharacterPacket::CharSelect(CharSelect::from_bytes(data)?)),
            0x1E8 => Ok(RecvCharacterPacket::Checksum(Checksum::from_bytes(data)?)),
            0x3E8 => Ok(RecvCharacterPacket::GuildcardDataRequest(GuildcardDataRequest::from_bytes(data)?)),
            0x3DC => Ok(RecvCharacterPacket::GuildcardDataChunkRequest(GuildcardDataChunkRequest::from_bytes(data)?)),
            0x4EB => Ok(RecvCharacterPacket::ParamDataRequest(ParamDataRequest::from_bytes(data)?)),
            0x3EB => Ok(RecvCharacterPacket::ParamDataChunkRequest(ParamDataChunkRequest::from_bytes(data)?)),
            0xE5 => Ok(RecvCharacterPacket::CharacterPreview(CharacterPreview::from_bytes(data)?)),
            0xEC => Ok(RecvCharacterPacket::SetFlag(SetFlag::from_bytes(data)?)),
            0x10 => Ok(RecvCharacterPacket::MenuSelect(MenuSelect::from_bytes(data)?)),
            0x09 => Ok(RecvCharacterPacket::MenuDetail(MenuDetail::from_bytes(data)?)),
            _ => Err(PacketParseError::WrongPacketForServerType(u16::from_le_bytes([data[2], data[3]]), data.to_vec()))
        }
    }
}


#[derive(Debug)]
pub enum SendCharacterPacket {
    LoginResponse(LoginResponse),
    LoginWelcome(LoginWelcome),
    SendKeyAndTeamSettings(Box<SendKeyAndTeamSettings>),
    CharAck(CharAck),
    ChecksumAck(ChecksumAck),
    CharacterPreview(CharacterPreview),
    GuildcardDataHeader(GuildcardDataHeader),
    GuildcardDataChunk(Box<GuildcardDataChunk>),
    ParamDataHeader(ParamDataHeader),
    ParamDataChunk(Box<ParamDataChunk>),
    Timestamp(Timestamp),
    ShipList(ShipList),
    RedirectClient(RedirectClient),
    SmallLeftDialog(SmallLeftDialog),
}

impl SendServerPacket for SendCharacterPacket {
    fn as_bytes(&self) -> Vec<u8> {
        match self {
            SendCharacterPacket::LoginResponse(pkt) => pkt.as_bytes(),
            SendCharacterPacket::LoginWelcome(pkt) => pkt.as_bytes(),
            SendCharacterPacket::SendKeyAndTeamSettings(pkt) => pkt.as_bytes(),
            SendCharacterPacket::CharAck(pkt) => pkt.as_bytes(),
            SendCharacterPacket::ChecksumAck(pkt) => pkt.as_bytes(),
            SendCharacterPacket::CharacterPreview(pkt) => pkt.as_bytes(),
            SendCharacterPacket::GuildcardDataHeader(pkt) => pkt.as_bytes(),
            SendCharacterPacket::GuildcardDataChunk(pkt) => pkt.as_bytes(),
            SendCharacterPacket::ParamDataHeader(pkt) => pkt.as_bytes(),
            SendCharacterPacket::ParamDataChunk(pkt) => pkt.as_bytes(),
            SendCharacterPacket::Timestamp(pkt) => pkt.as_bytes(),
            SendCharacterPacket::ShipList(pkt) => pkt.as_bytes(),
            SendCharacterPacket::RedirectClient(pkt) => pkt.as_bytes(),
            SendCharacterPacket::SmallLeftDialog(pkt) => pkt.as_bytes(),
        }
    }
}


fn generate_param_data(path: &str) -> (ParamDataHeader, Vec<u8>) {
    let paths = std::fs::read_dir(path).expect("could not find param/ directory");

    let mut files = Vec::new();
    let mut buffer = Vec::new();
    for p in paths {
        let param = p.unwrap().path();
        let mut file = std::fs::File::open(&param).unwrap();

        let mut filebuf = Vec::new();
        let len = file.read_to_end(&mut filebuf).unwrap();

        let mut crc = crc32::Digest::new(crc32::IEEE);
        crc.write(&filebuf[..]);

        files.push(ParamFile {
            size: len as u32,
            checksum: crc.sum32(),
            offset: buffer.len() as u32,
            filename: utf8_to_array!(param.file_name().unwrap().to_str().unwrap(), 0x40),
        });

        buffer.append(&mut filebuf);
    }

    (ParamDataHeader {
        files
    }, buffer)
}

#[derive(Clone)]
struct ClientState {
    param_index: usize,
    user: Option<UserAccountEntity>,
    characters: Option<[Option<CharacterEntity>; 4]>,
    guildcard_data_buffer: Option<Vec<u8>>,
    session: Session,
}

impl ClientState {
    fn new() -> ClientState {
        ClientState {
            param_index: 0,
            user: None,
            characters: None,
            guildcard_data_buffer: None,
            session: Session::new(),
        }
    }
}

#[derive(Debug, Clone)]
struct ConnectedClient {
    ship_id: Option<ServerId>,
    expires: Option<chrono::DateTime<chrono::Utc>>,
}

#[derive(Clone)]
pub struct CharacterServerState<EG: EntityGateway + Clone> {
    entity_gateway: EG,
    param_header: ParamDataHeader,
    param_data: Arc<Vec<u8>>,
    clients: Arc<RwLock<HashMap<ClientId, ClientState>>>,
    ships: Arc<RwLock<BTreeMap<ServerId, Ship>>>,
    auth_token: AuthToken,

    connected_clients: Arc<RwLock<BTreeMap<UserAccountId, ConnectedClient>>>,
    authenticated_ships: Arc<RwLock<BTreeSet<ServerId>>>,
    ship_sender: Arc<RwLock<BTreeMap<ServerId, channel::Sender<LoginMessage>>>>,
}


async fn new_character<EG: EntityGateway + Clone>(entity_gateway: &mut EG, user: &UserAccountEntity, preview: &CharacterPreview) -> Result<(), anyhow::Error> {
    let mut character = new_character_from_preview(user, preview);
    match character.char_class {
        CharacterClass::FOmar | CharacterClass::FOmarl| CharacterClass::FOnewm | CharacterClass::FOnewearl => character.techs.set_tech(Technique::Foie, TechLevel(1)),
        _ => {}
    }

    let character = entity_gateway.create_character(character).await?;
    entity_gateway.set_character_meseta(&character.id, Meseta(300)).await?;
    entity_gateway.set_bank_meseta(&character.id, &BankIdentifier::Character, Meseta(0)).await?;

    let new_weapon = match character.char_class {
        CharacterClass::HUmar | CharacterClass::HUnewearl | CharacterClass::HUcast | CharacterClass::HUcaseal => item::weapon::WeaponType::Saber,
        CharacterClass::RAmar | CharacterClass::RAmarl | CharacterClass::RAcast | CharacterClass::RAcaseal => item::weapon::WeaponType::Handgun,
        CharacterClass::FOmar | CharacterClass::FOmarl | CharacterClass::FOnewm | CharacterClass::FOnewearl => item::weapon::WeaponType::Cane,
    };


    let weapon = entity_gateway.create_item(
        NewItemEntity {
            item : ItemDetail::Weapon(
                Weapon {
                    weapon: new_weapon,
                    grind: 0,
                    special: None,
                    attrs: [None; 3],
                    tekked: true,
            })}).await?;

    entity_gateway.add_item_note(&weapon.id, ItemNote::CharacterCreation {
        character_id: character.id,
    }).await?;

    let armor = entity_gateway.create_item(
        NewItemEntity {
            item: ItemDetail::Armor (
                Armor {
                    armor: item::armor::ArmorType::Frame,
                    dfp: 0,
                    evp: 0,
                    slots: 0,
                })}).await?;

    entity_gateway.add_item_note(&armor.id, ItemNote::CharacterCreation {
        character_id: character.id,
    }).await?;

    let mut mag = {
        if character.char_class.is_android() {
            Mag::baby_mag(character.appearance.skin)
        } else {
            Mag::baby_mag(character.appearance.costume)
        }
    };
    mag.change_owner(character.char_class, character.section_id);
    let mag = entity_gateway.create_item(
        NewItemEntity {
            item: ItemDetail::Mag(mag),
        }).await?;

    entity_gateway.add_item_note(&mag.id, ItemNote::CharacterCreation {
        character_id: character.id,
    }).await?;

    entity_gateway.change_mag_owner(&mag.id, &character).await?;

    let mut monomates = Vec::new();
    for _ in 0..4usize {
        let monomate = entity_gateway.create_item(
            NewItemEntity {
                item: ItemDetail::Tool (
                    Tool {
                        tool: item::tool::ToolType::Monomate,
                    })}).await?;

        entity_gateway.add_item_note(&monomate.id, ItemNote::CharacterCreation {
            character_id: character.id
        }).await?;

        monomates.push(monomate);
    }

    let mut monofluids = Vec::new();
    for _ in 0..4usize {
        let monofluid = entity_gateway.create_item(
            NewItemEntity {
                item: ItemDetail::Tool (
                    Tool {
                        tool: item::tool::ToolType::Monofluid,
                    })}).await?;

        entity_gateway.add_item_note(&monofluid.id, ItemNote::CharacterCreation {
            character_id: character.id
        }).await?;

        monofluids.push(monofluid);
    }

    let inventory = InventoryEntity {
        items: vec![InventoryItemEntity::Individual(weapon.clone()), InventoryItemEntity::Individual(armor.clone()), InventoryItemEntity::Individual(mag.clone()),
                    InventoryItemEntity::Stacked(monomates), InventoryItemEntity::Stacked(monofluids)],
    };
    entity_gateway.set_character_inventory(&character.id, &inventory).await?;
    entity_gateway.set_character_bank(&character.id, &BankEntity::default(), &BankIdentifier::Character).await?;
    let equipped = EquippedEntity {
        weapon: Some(weapon.id),
        armor: Some(armor.id),
        mag: Some(mag.id),
        ..Default::default()
    };
    entity_gateway.set_character_equips(&character.id, &equipped).await?;
    Ok(())
}


impl<EG: EntityGateway + Clone> CharacterServerState<EG> {
    pub fn new(entity_gateway: EG, auth_token: AuthToken) -> CharacterServerState<EG> {
        let (param_header, param_data) = generate_param_data("data/param/");

        CharacterServerState {
            entity_gateway,
            param_header,
            param_data: Arc::new(param_data),
            clients: Default::default(),
            ships: Default::default(),
            //level_table: CharacterLevelTable::default(),
            auth_token,
            authenticated_ships: Default::default(),
            ship_sender: Default::default(),
            connected_clients: Default::default(),
        }
    }

    async fn validate_login(&mut self, id: ClientId, pkt: &Login) -> Result<Vec<SendCharacterPacket>, anyhow::Error> {
        match get_login_status(&mut self.entity_gateway, pkt).await {
            Ok(user) => {
                if let Some(connected_client) = self.connected_clients.read().await.get(&user.id) {
                    if let Some(expires) = connected_client.expires {
                        if expires > chrono::Utc::now() {
                            return Ok(vec![SendCharacterPacket::LoginResponse(LoginResponse::by_status(AccountStatus::AlreadyOnline, Session::new()))]);
                        }
                    }
                    else {
                        return Ok(vec![SendCharacterPacket::LoginResponse(LoginResponse::by_status(AccountStatus::AlreadyOnline, Session::new()))]);
                    }
                }

                let mut response = LoginResponse::by_status(AccountStatus::Ok, Session::new());
                response.guildcard = user.guildcard;
                response.team_id = user.team_id.map_or(0, |ti| ti);

                let mut client = self.clients.write().await;
                let client = client.get_mut(&id).ok_or_else(|| CharacterError::ClientNotFound(id))?;

                self.connected_clients.write().await.insert(user.id, ConnectedClient {
                    ship_id: None,
                    expires: None, //Some(chrono::Utc::now() + chrono::Duration::minutes(1)),
                });

                client.user = Some(user);
                client.session = pkt.session;
                Ok(vec![SendCharacterPacket::LoginResponse(response)])
            },
            Err(err) => {
                Ok(vec![SendCharacterPacket::LoginResponse(LoginResponse::by_status(err, Session::new()))])
            }
        }
    }

    async fn send_ship_list(&mut self, _id: ClientId, _pkt: &Login) -> Result<Vec<SendCharacterPacket>, anyhow::Error> {
        Ok(vec![SendCharacterPacket::Timestamp(Timestamp::new(chrono::Utc::now())),
                SendCharacterPacket::ShipList(ShipList::new(self.ships.read().await.iter().map(|(i, s)| {
                    ShipListEntry {
                        menu: SHIP_MENU_ID,
                        item: i.0 as u32,
                        flags: 0,
                        name: utf8_to_utf16_array!(s.name, 0x11)
                    }
                }).collect()))
        ])
    }

    async fn get_settings(&mut self, id: ClientId) -> Result<Vec<SendCharacterPacket>, anyhow::Error> {
        let mut client = self.clients.write().await;
        let client = client.get_mut(&id).ok_or_else(|| CharacterError::ClientNotFound(id))?;
        let user = client.user.as_ref().unwrap();

        let settings = match self.entity_gateway.get_user_settings_by_user(user).await {
            Ok(settings) => settings,
            Err(_) => {
                let user_settings = NewUserSettingsEntity::new(user.id);
                self.entity_gateway.create_user_settings(user_settings).await.map_err(CharacterError::CouldNotLoadSettings)?
            }
        };

        let pkt = SendKeyAndTeamSettings::new(settings.settings.keyboard_config,
                                              settings.settings.gamepad_config, 0, 0);
        let pkt = SendCharacterPacket::SendKeyAndTeamSettings(Box::new(pkt));

        Ok(vec![pkt])
    }

    async fn char_select(&mut self, id: ClientId, select: &CharSelect) -> Result<Vec<SendCharacterPacket>, anyhow::Error> {
        let mut client = self.clients.write().await;
        let client = client.get_mut(&id).ok_or_else(|| CharacterError::ClientNotFound(id))?;
        if client.characters.is_none() {
            client.characters = Some(self.entity_gateway.get_characters_by_user(client.user.as_ref().unwrap()).await.map_err(|_| CharacterError::CouldNotLoadCharacters)?);
        }

        if select.reason == 0 {
            let chars = client.characters.as_ref().unwrap();
            Ok(if let Some(char) = &chars[select.slot as usize] {
                let (level, _stats) = LEVEL_TABLE.get_stats_from_exp(char.char_class, char.exp);
                vec![SendCharacterPacket::CharacterPreview(CharacterPreview {
                    slot: select.slot,
                    character: SelectScreenCharacterBuilder::new()
                        .character(char)
                        .level(level)
                        .build()
                })]
            }
               else {
                   vec![SendCharacterPacket::CharAck(CharAck {
                       slot: select.slot,
                       code: 2,
                   })]
               })
        }
        else {
            let user = client.user.as_ref().unwrap();
            client.session.action = SessionAction::SelectCharacter;
            client.session.character_slot = select.slot as u8;
            Ok(vec![SendCharacterPacket::LoginResponse(LoginResponse::by_char_select(user.guildcard,
                                                                                     user.team_id.unwrap_or(1),
                                                                                     client.session)),
                    SendCharacterPacket::CharAck(CharAck {
                        slot: select.slot,
                        code: 1,
                    })
            ])
        }
    }

    fn validate_checksum(&mut self) -> Vec<SendCharacterPacket> {
        vec![SendCharacterPacket::ChecksumAck(ChecksumAck {
            ack: 1,
        })]
    }

    async fn guildcard_data_header(&mut self, id: ClientId) -> Result<Vec<SendCharacterPacket>, anyhow::Error> {
        let mut client = self.clients.write().await;
        let client = client.get_mut(&id).ok_or_else(|| CharacterError::ClientNotFound(id))?;
        let guildcard_data = self.entity_gateway.get_guild_card_data_by_user(client.user.as_ref().unwrap()).await.map_err(|_| CharacterError::CouldNotLoadGuildcard)?;

        let bytes = guildcard_data.guildcard.as_bytes();
        let mut crc = crc32::Digest::new(crc32::IEEE);
        crc.write(&bytes[..]);
        client.guildcard_data_buffer = Some(bytes.to_vec());

        Ok(vec![SendCharacterPacket::GuildcardDataHeader(GuildcardDataHeader::new(bytes.len(), crc.sum32()))])
    }

    async fn guildcard_data_chunk(&mut self, id: ClientId, chunk: u32, again: u32) -> Result<Vec<SendCharacterPacket>, anyhow::Error> {
        let mut client = self.clients.write().await;
        let client = client.get_mut(&id).ok_or_else(|| CharacterError::ClientNotFound(id))?;
        Ok(if again != 0 {
            let start = chunk as usize * GUILD_CARD_CHUNK_SIZE;
            let len = std::cmp::min(GUILD_CARD_CHUNK_SIZE, client.guildcard_data_buffer.as_ref().unwrap().len() - start);
            let end = start + len;

            let mut buf = [0u8; GUILD_CARD_CHUNK_SIZE];
            buf[..len].copy_from_slice(&client.guildcard_data_buffer.as_ref().unwrap()[start..end]);

            vec![SendCharacterPacket::GuildcardDataChunk(Box::new(GuildcardDataChunk::new(chunk, buf, len)))]
        } else {
            Vec::new()
        })
    }

    async fn set_flag(&mut self, id: ClientId, setflag: &SetFlag) -> Result<std::option::IntoIter<SendCharacterPacket>, anyhow::Error> {
        let mut client = self.clients.write().await;
        let client = client.get_mut(&id).ok_or_else(|| CharacterError::ClientNotFound(id))?;
        let user = client.user.as_mut().unwrap();
        user.flags = setflag.flags;
        self.entity_gateway.save_user(user).await.unwrap();
        Ok(None.into_iter())
    }

    async fn param_data_chunk_request(&mut self, id: ClientId, _request: &ParamDataChunkRequest) -> Result<Vec<SendCharacterPacket>, anyhow::Error> {
        let mut client = self.clients.write().await;
        let client = client.get_mut(&id).ok_or_else(|| CharacterError::ClientNotFound(id))?;
        let chunk = client.param_index;
        client.param_index += 1;

        let start = chunk * 0x6800;
        let end = std::cmp::min((chunk+1)*0x6800, self.param_data.len());

        let mut data = [0u8; 0x6800];
        data[..end-start].copy_from_slice(&self.param_data[start..end]);

        Ok(vec![SendCharacterPacket::ParamDataChunk(
            Box::new(ParamDataChunk {
                chunk: chunk as u32,
                data,
            })
        )])
    }


    // TODO: move USERFLAGS over to SessionAction
    async fn character_preview(&mut self, id: ClientId, preview: &CharacterPreview) -> Result<Vec<SendCharacterPacket>, anyhow::Error> {
        let mut client = self.clients.write().await;
        let client = client.get_mut(&id).ok_or_else(|| CharacterError::ClientNotFound(id))?;
        let user = client.user.as_mut().unwrap();
        if user.flags == USERFLAG_NEWCHAR {
            new_character(&mut self.entity_gateway, user, preview).await?
        }
        if user.flags == USERFLAG_DRESSINGROOM {
            // TODO: dressing room stuff
        }

        client.session.action = SessionAction::SelectCharacter;
        client.session.character_slot = preview.slot as u8;
        user.flags = 0;
        self.entity_gateway.save_user(user).await.unwrap();
        Ok(vec![SendCharacterPacket::LoginResponse(LoginResponse::by_char_select(user.guildcard,
                                                                                 user.team_id.unwrap_or(1),
                                                                                 client.session)),
                SendCharacterPacket::CharAck(CharAck {
                    slot: preview.slot,
                    code: 0
                })
        ])
    }

    async fn select_ship(&mut self, id: ClientId, menuselect: &MenuSelect) -> Result<Vec<SendCharacterPacket>, anyhow::Error> {
        if menuselect.menu != SHIP_MENU_ID {
           return Err(CharacterError::InvalidMenuSelection(menuselect.menu, menuselect.item).into());
        }

        if let Some(client) = self.clients.read().await.get(&id) {
            if let Some(user) = &client.user {
                if let Some(cc) = self.connected_clients.write().await.get_mut(&user.id) {
                    cc.ship_id = Some(ServerId(menuselect.item as usize));
                }
            }
        }

        let ship = self.ships.read().await;
        let ship = ship.get(&ServerId(menuselect.item as usize))
            .ok_or_else(|| CharacterError::InvalidMenuSelection(menuselect.menu, menuselect.item))?;
        Ok(vec![SendCharacterPacket::RedirectClient(RedirectClient::new(u32::from_le_bytes(ship.ip.octets()), ship.port))])
    }

    async fn ship_detail(&mut self, menudetail: &MenuDetail) -> Result<Vec<SendCharacterPacket>, anyhow::Error> {
        let players = self.connected_clients
            .read()
            .await
            .iter()
            .filter(|(_, client)| {
                client.ship_id == Some(ServerId(menudetail.item as usize))
            })
            .count();
        let ship_details = format!("players: {}\nrooms: {}", players, 0);
        Ok(vec![SendCharacterPacket::SmallLeftDialog(SmallLeftDialog::new(ship_details))])
    }
}

#[async_trait::async_trait]
impl<EG: EntityGateway + Clone> ServerState for CharacterServerState<EG> {
    type SendPacket = SendCharacterPacket;
    type RecvPacket = RecvCharacterPacket;
    type Cipher = PSOBBCipher;
    type PacketError = anyhow::Error;

    async fn on_connect(&mut self, id: ClientId) -> Result<Vec<OnConnect<Self::SendPacket, Self::Cipher>>, anyhow::Error> {
        self.clients.write().await.insert(id, ClientState::new());

        let mut rng = rand::thread_rng();

        let mut server_key = [0u8; 48];
        let mut client_key = [0u8; 48];
        rng.fill(&mut server_key[..]);
        rng.fill(&mut client_key[..]);

        Ok(vec![OnConnect::Packet(SendCharacterPacket::LoginWelcome(LoginWelcome::new(server_key, client_key))),
                OnConnect::Cipher(PSOBBCipher::new(ELSEWHERE_PARRAY, ELSEWHERE_PRIVATE_KEY, client_key),
                                  PSOBBCipher::new(ELSEWHERE_PARRAY, ELSEWHERE_PRIVATE_KEY, server_key))
             //OnConnect::Cipher((Box::new(PSOBBCipher::new(ELSEWHERE_PARRAY, ELSEWHERE_PRIVATE_KEY, client_key)),
             //                   Box::new(PSOBBCipher::new(ELSEWHERE_PARRAY, ELSEWHERE_PRIVATE_KEY, server_key))))
        ])
    }

    async fn handle(&mut self, id: ClientId, pkt: RecvCharacterPacket) -> Result<Vec<(ClientId, SendCharacterPacket)>, anyhow::Error> {
        Ok(match pkt {
            RecvCharacterPacket::Login(login) => {
                if login.session.action == SessionAction::SelectCharacter {
                    self.send_ship_list(id, &login).await?.into_iter().map(move |pkt| (id, pkt)).collect()
                }
                else {
                    self.validate_login(id, &login).await?.into_iter().map(move |pkt| (id, pkt)).collect()
                }
            },
            RecvCharacterPacket::RequestSettings(_req) => {
                self.get_settings(id).await?.into_iter().map(move |pkt| (id, pkt)).collect()
            },
            RecvCharacterPacket::CharSelect(sel) => {
                self.char_select(id, &sel).await?.into_iter().map(move |pkt| (id, pkt)).collect()
            },
            RecvCharacterPacket::Checksum(_checksum) => {
                self.validate_checksum().into_iter().map(move |pkt| (id, pkt)).collect()
            },
            RecvCharacterPacket::GuildcardDataRequest(_request) => {
                self.guildcard_data_header(id).await?.into_iter().map(move |pkt| (id, pkt)).collect()
            },
            RecvCharacterPacket::GuildcardDataChunkRequest(request) => {
                self.guildcard_data_chunk(id, request.chunk, request.again).await?.into_iter().map(move |pkt| (id, pkt)).collect()
            },
            RecvCharacterPacket::ParamDataRequest(_request) => {
                vec![SendCharacterPacket::ParamDataHeader(self.param_header.clone())].into_iter().map(move |pkt| (id, pkt)).collect()
            },
            RecvCharacterPacket::SetFlag(flag) => {
                self.set_flag(id, &flag).await?.map(move |pkt| (id, pkt)).collect()
            },
            RecvCharacterPacket::ParamDataChunkRequest(request) => {
                self.param_data_chunk_request(id, &request).await?.into_iter().map(move |pkt| (id, pkt)).collect()
            },
            RecvCharacterPacket::CharacterPreview(preview) => {
                self.character_preview(id, &preview).await?.into_iter().map(move |pkt| (id, pkt)).collect()
            },
            RecvCharacterPacket::MenuSelect(menuselect) => {
                self.select_ship(id, &menuselect).await?.into_iter().map(move |pkt| (id, pkt)).collect()
            },
            RecvCharacterPacket::MenuDetail(menudetail) => {
                match menudetail.menu {
                    SHIP_MENU_ID => self.ship_detail(&menudetail).await?.into_iter().map(move |pkt| (id, pkt)).collect(),
                    _ => Vec::new()
                }
            }
        })
    }

    async fn on_disconnect(&mut self, id: ClientId) -> Result<Vec<(ClientId, SendCharacterPacket)>, anyhow::Error> {
        if let Some(client) = self.clients.write().await.remove(&id) {
            if let Some(user) = client.user {
                self.connected_clients.write().await.remove(&user.id);
            }
        }
        Ok(Vec::new())
    }
}

#[async_trait::async_trait]
impl<EG: EntityGateway + Clone> InterserverActor for CharacterServerState<EG> {
    type SendMessage = LoginMessage;
    type RecvMessage = ShipMessage;
    type Error = ();

    async fn on_connect(&mut self, _id: ServerId) -> Vec<(ServerId, Self::SendMessage)> {
        Vec::new()
    }

    async fn on_action(&mut self, id: ServerId, msg: Self::RecvMessage) -> Result<Vec<(ServerId, Self::SendMessage)>, Self::Error> {
        dbg!(&id, &msg);
        match msg {
            ShipMessage::Authenticate(auth_token) => {
                if self.auth_token == auth_token {
                    self.authenticated_ships.write().await.insert(id);
                }
                Ok(Vec::new())
            },
            ShipMessage::NewShip(new_ship) => {
                dbg!("adding ship", &id, &new_ship);
                if self.authenticated_ships.read().await.contains(&id) {
                    self.ships.write().await.insert(id, new_ship);
                }
                dbg!("ship list", &self.authenticated_ships);

                let ships = self.ships.read().await.iter().map(|(_, s)| s).cloned().collect::<Vec<_>>();
                Ok(self.ships
                   .read()
                   .await
                   .iter()
                   .map(|(id, _)| {
                       (*id, LoginMessage::ShipList{ ships: ships.clone() })
                   })
                   .collect())
            },
            ShipMessage::AddUser(new_user) => {
                if self.authenticated_ships.read().await.contains(&id) {
                    self.connected_clients.write().await.insert(new_user, ConnectedClient {
                        ship_id: Some(id),
                        expires: None,
                    });
                }
                Ok(Vec::new())
            },
            ShipMessage::RemoveUser(new_user) => {
                if self.authenticated_ships.read().await.contains(&id) {
                    self.connected_clients.write().await.remove(&new_user);
                }
                Ok(Vec::new())
            },
            ShipMessage::RequestShipList => {
                dbg!("request ship list", &self.authenticated_ships);
                if self.authenticated_ships.read().await.contains(&id) {
                    Ok(vec![(id, LoginMessage::ShipList {
                        ships: self.ships
                            .read()
                            .await
                            .iter()
                            .map(|(_, ship)| {
                                ship
                            })
                            .cloned()
                            .collect()
                    })])
                }
                else {
                    Ok(Vec::new())
                }
            },
            ShipMessage::SendMail{..} => {
                Ok(Vec::new())
            },
        }
    }

    async fn on_disconnect(&mut self, id: ServerId) -> Vec<(ServerId, Self::SendMessage)> {
        self.ships.write().await.remove(&id);
        self.ship_sender.write().await.remove(&id);
        self.connected_clients
            .write()
            .await
            .retain(|_, client| {
                client.ship_id != Some(id)
            });
        Vec::new()
    }

    async fn set_sender(&mut self, server_id: ServerId, sender: channel::Sender<LoginMessage>) {
        self.ship_sender.write().await.insert(server_id, sender);
    }
}


fn new_character_from_preview(user: &UserAccountEntity, preview: &CharacterPreview) -> NewCharacterEntity {
    let mut character = NewCharacterEntity::new(user.id);
    character.slot = preview.slot;
    character.name = String::from_utf16_lossy(&preview.character.name).trim_matches(char::from(0)).into();
    character.section_id = preview.character.section_id.into();
    character.char_class = preview.character.ch_class.into();
    character.appearance.costume = preview.character.costume;
    character.appearance.skin = preview.character.skin;
    character.appearance.face = preview.character.face;
    character.appearance.head = preview.character.head;
    character.appearance.hair = preview.character.hair;
    character.appearance.hair_r = preview.character.hair_r;
    character.appearance.hair_g = preview.character.hair_g;
    character.appearance.hair_b = preview.character.hair_b;
    character.appearance.prop_x = preview.character.prop_x;
    character.appearance.prop_y = preview.character.prop_y;
    character
}


struct SelectScreenCharacterBuilder<'a> {
    character: Option<&'a CharacterEntity>,
    level: Option<u32>,
}

impl<'a> SelectScreenCharacterBuilder<'a> {
    fn new() -> SelectScreenCharacterBuilder<'a> {
        SelectScreenCharacterBuilder {
            character: None,
            level: None,
        }
    }

    fn character(self, character: &'a CharacterEntity) -> SelectScreenCharacterBuilder<'a> {
        SelectScreenCharacterBuilder {
            character: Some(character),
            ..self
        }
    }

    fn level(self, level: u32) -> SelectScreenCharacterBuilder<'a> {
        SelectScreenCharacterBuilder {
            level: Some(level),
            ..self
        }
    }

    fn build(self) -> character::SelectScreenCharacter {
        let character = self.character.unwrap();
        let level = self.level.unwrap();

        character::SelectScreenCharacter {
            //exp: character.exp,
            level: level - 1,
            //guildcard: character.guildcard,
            //_unknown: character._unknown3,
            //name_color: character.name_color,
            //model: character.model,
            //_unused: [0; 15],
            //name_color_checksum: character.name_color_checksum,
            section_id: character.section_id.into(),
            ch_class: character.char_class.into(),
            //v2flags: character.v2flags,
            //version: character.version,
            //v1flags: character.v1flags,
            costume: character.appearance.costume,
            skin: character.appearance.skin,
            face: character.appearance.face,
            head: character.appearance.head,
            hair: character.appearance.hair,
            hair_r: character.appearance.hair_r,
            hair_g: character.appearance.hair_g,
            hair_b: character.appearance.hair_b,
            prop_x: character.appearance.prop_x,
            prop_y: character.appearance.prop_y,
            name: utf8_to_utf16_array!(character.name, 16),
            play_time: character.playtime,
            ..character::SelectScreenCharacter::default()
        }
    }
}


#[cfg(test)]
mod test {
    use super::*;
    use entity::account::*;
    use libpso::character::{settings, character};
    use entity::gateway::{InMemoryGateway, EntityGatewayTransaction, GatewayError};

    #[derive(Clone)]
    struct CharTestDb;
    
    impl EntityGateway for CharTestDb {
        type Transaction<'t> = CharTestDb where Self: 't;
    }

    impl EntityGatewayTransaction for CharTestDb {
        type ParentGateway = CharTestDb;
    }


    #[async_std::test]
    async fn test_option_send() {
        #[derive(Clone)]
        struct TestData {
        }

        #[async_trait::async_trait]
        impl EntityGateway for TestData {
            type Transaction<'a> = CharTestDb where Self: 'a;
            async fn get_user_settings_by_user(&mut self, user: &UserAccountEntity) -> Result<UserSettingsEntity, GatewayError> {
                Ok(UserSettingsEntity {
                    id: UserSettingsId(0),
                    user_id: user.id,
                    settings: settings::UserSettings::default()
                })
            }
        }

        let mut server = CharacterServerState::new(TestData {}, AuthToken("".into()));
        let mut clientstate = ClientState::new();
        clientstate.user = Some(UserAccountEntity {
            id: UserAccountId(1),
            username: "testuser".to_owned(),
            password: bcrypt::hash("mypassword", 5).unwrap(),
            guildcard: 0,
            banned_until: None,
            muted_until: None,
            created_at: chrono::Utc::now(),
            team_id: None,
            flags: 0,
            activated: true,
            at_login: false,
            at_character: false,
            at_ship: false,
        });
        server.clients.write().await.insert(ClientId(5), clientstate);

        let send = server.handle(ClientId(5), RecvCharacterPacket::RequestSettings(RequestSettings{})).await.unwrap();
        assert!(send.len() == 1);

        assert!(send[0].0 == ClientId(5));
        let bytes = send[0].1.as_bytes();
        assert!(bytes[2] == 0xE2);
        assert!(bytes.len() == 0xAFC);
    }

    #[async_std::test]
    async fn test_user_checksum() {
        #[derive(Clone)]
        struct TestData;
        impl EntityGateway for TestData {
            type Transaction<'a> = CharTestDb where Self: 'a;
        }
        let mut server = CharacterServerState::new(TestData {}, AuthToken("".into()));
        let send = server.handle(ClientId(1), RecvCharacterPacket::Checksum(Checksum {checksum: 1234,
                                                                                      padding: 0,
        })).await.unwrap();
        assert!(send.len() == 1);

        let bytes = send[0].1.as_bytes();
        assert!(bytes == [0xC, 0, 0xE8, 0x02, 0,0,0,0, 1,0,0,0]);
    }

    #[async_std::test]
    async fn test_character_create() {
        let mut test_data = InMemoryGateway::default();
        let mut fake_user = ClientState::new();
        fake_user.user = Some(UserAccountEntity {
            id: UserAccountId(3),
            username: "hi3".to_string(),
            password: bcrypt::hash("qwer", 5).unwrap(),
            guildcard: 3,
            team_id: None,
            banned_until: None,
            muted_until: None,
            created_at: chrono::Utc::now(),
            flags: 0,
            activated: true,
            at_login: false,
            at_character: false,
            at_ship: false,
        });

        let mut server = CharacterServerState::new(test_data.clone(), AuthToken("".into()));
        server.clients.write().await.insert(ClientId(1), fake_user.clone());
        let mut send = server.handle(ClientId(1), RecvCharacterPacket::SetFlag(SetFlag {flags: 1})).await.unwrap();
        assert!(test_data.get_user_by_id(UserAccountId(3)).await.unwrap().flags == 1);
        send = server.handle(ClientId(1), RecvCharacterPacket::CharacterPreview(CharacterPreview {slot: 1, character: character::SelectScreenCharacter {
            exp: 0,
            level: 0,
            guildcard: [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
            _unknown: [0, 0],
            name_color: 4294967295,
            model: 0,
            _unused: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
            name_color_checksum: 0,
            section_id: 4,
            ch_class: 2,
            v2flags: 0,
            version: 3,
            v1flags: 49,
            costume: 0,
            skin: 4,
            face: 0,
            head: 0,
            hair: 0,
            hair_r: 0,
            hair_g: 0,
            hair_b: 0,
            prop_x: 0.33333334,
            prop_y: 0.0,
            name: [9, 69, 116, 101, 115, 116, 32, 110, 97, 109, 101, 0, 0, 0, 0, 0], // "\tEtest name"
            play_time: 0,
        } })).await.unwrap();
        assert!(send.len() == 2);

        let chars = test_data.get_characters_by_user(&fake_user.user.unwrap()).await.unwrap();
        assert!(chars[1].as_ref().unwrap().name == "\tEtest name");
        assert!(chars[0].is_none());
    }
}