use std::time::{Instant};

use actix_web_actors::ws;

use postgres::transaction::Transaction;
use serde_cbor::{from_slice};
use uuid::Uuid;
use failure::Error;
use failure::err_msg;

use net::{Db};
use ws::{MnmlSocket};
use construct::{Construct, construct_spawn, construct_delete};
use game::{Game, game_state, game_skill, game_ready};
use account::{Account, account_constructs, account_instances};
use skill::{Skill, dev_resolve, Resolutions};
use instance::{Instance, instance_state, instance_list, instance_new, instance_ready, instance_join};
use vbox::{vbox_accept, vbox_apply, vbox_discard, vbox_combine, vbox_reclaim, vbox_unequip};
use item::{Item, ItemInfoCtr, item_info};

type MnmlWs = ws::WebsocketContext<MnmlSocket>;

pub fn receive(data: Vec<u8>, db: &Db, _client: &mut MnmlWs, begin: Instant, account: Option<&Account>) -> Result<RpcResult, Error> {
    // cast the msg to this type to receive method name
    match from_slice::<RpcMessage>(&data) {
        Ok(v) => {
            if v.method == "ping" {
                return Ok(RpcResult::Pong(()));
            }

            let mut tx = db.transaction()?;

            let account_name = match account {
                Some(a) => a.name.clone(),
                None => "none".to_string(),
            };

            // check the method
            // if no auth required
            match v.method.as_ref() {
                "item_info" => return Ok(RpcResult::ItemInfo(item_info())),
                "dev_game_resolve" => return handle_dev_resolve(data),
                _ => match account {
                    Some(_) => (),
                    None => return Err(err_msg("auth required")),
                },
            };

            let account = account.unwrap();

            // now we have the method name
            // match on that to determine what fn to call
            let response = match v.method.as_ref() {
                "account_state" => return Ok(RpcResult::AccountState(account.clone())),
                "account_constructs" => handle_account_constructs(data, &mut tx, account),
                "account_instances" => handle_account_instances(data, &mut tx, account),

                "construct_spawn" => handle_construct_spawn(data, &mut tx, account),
                "construct_delete" => handle_construct_delete(data, &mut tx, account),

                "game_state" => handle_game_state(data, &mut tx, account),
                "game_skill" => handle_game_skill(data, &mut tx, account),
                "game_ready" => handle_game_ready(data, &mut tx, account),

                "instance_list" => handle_instance_list(data, &mut tx, account),
                "instance_join" => handle_instance_join(data, &mut tx, account),
                "instance_ready" => handle_instance_ready(data, &mut tx, account),
                "instance_new" => handle_instance_new(data, &mut tx, account),
                "instance_state" => handle_instance_state(data, &mut tx, account),

                "vbox_accept" => handle_vbox_accept(data, &mut tx, account),
                "vbox_apply" => handle_vbox_apply(data, &mut tx, account),
                "vbox_combine" => handle_vbox_combine(data, &mut tx, account),
                "vbox_discard" => handle_vbox_discard(data, &mut tx, account),
                "vbox_reclaim" => handle_vbox_reclaim(data, &mut tx, account),
                "vbox_unequip" => handle_vbox_unequip(data, &mut tx, account),

                _ => Err(format_err!("unknown method - {:?}", v.method)),
            };

            tx.commit()?;

            info!("method={:?} account={:?} duration={:?}", v.method, account_name, begin.elapsed());

            return response;
        },
        Err(e) => {
            info!("{:?}", e);
            Err(err_msg("unknown error"))
        },
    }
}

fn handle_game_state(data: Vec<u8>, tx: &mut Transaction, account: &Account) -> Result<RpcResult, Error> {
    let msg = from_slice::<GameStateMsg>(&data).or(Err(err_msg("invalid params")))?;
    return Ok(RpcResult::GameState(game_state(msg.params, tx, &account)?));
}

// fn handle_game_pve(data: Vec<u8>, tx: &mut Transaction, account: &Account) -> Result<RpcResult, Error> {
//     let msg = from_slice::<GamePveMsg>(&data).or(Err(err_msg("invalid params")))?;

//     let game_response = RpcResponse {
//         method: "game_state".to_string(),
//         params: RpcResult::GameState(game_pve(msg.params, tx, &account)?)
//     };

//     return Ok(game_response);
// }

fn handle_game_skill(data: Vec<u8>, tx: &mut Transaction, account: &Account) -> Result<RpcResult, Error> {
    let msg = from_slice::<GameSkillMsg>(&data).or(Err(err_msg("invalid params")))?;
    Ok(RpcResult::GameState(game_skill(msg.params, tx, &account)?))
}

fn handle_game_ready(data: Vec<u8>, tx: &mut Transaction, account: &Account) -> Result<RpcResult, Error> {
    let msg = from_slice::<GameStateMsg>(&data).or(Err(err_msg("invalid params")))?;
    Ok(RpcResult::GameState(game_ready(msg.params, tx, &account)?))
}


fn handle_construct_spawn(data: Vec<u8>, tx: &mut Transaction, account: &Account) -> Result<RpcResult, Error> {
    let msg = from_slice::<ConstructSpawnMsg>(&data).or(Err(err_msg("invalid params")))?;
    construct_spawn(msg.params, tx, &account)?;
    Ok(RpcResult::AccountConstructs(account_constructs(tx, &account)?))
}

fn handle_construct_delete(data: Vec<u8>, tx: &mut Transaction, account: &Account) -> Result<RpcResult, Error> {
    let msg = from_slice::<ConstructDeleteMsg>(&data).or(Err(err_msg("invalid params")))?;
    construct_delete(tx, msg.params.id, account.id)?;
    Ok(RpcResult::AccountConstructs(account_constructs(tx, &account)?))
}


// fn handle_account_create(data: Vec<u8>, tx: &mut Transaction) -> Result<RpcResult, Error> {
//     let msg = from_slice::<AccountCreateMsg>(&data).or(Err(err_msg("invalid params")))?;
//     let account = account_create(msg.params, tx)?;
//     Ok(RpcResult::Account(account))
// }

// fn handle_account_login(data: Vec<u8>, tx: &mut Transaction) -> Result<RpcResult, Error> {
//     let msg = from_slice::<AccountLoginMsg>(&data).or(Err(err_msg("invalid params")))?;
//     Ok(RpcResult::Account(account_login(msg.params, tx)?))
// }

fn handle_account_constructs(_data: Vec<u8>, tx: &mut Transaction, account: &Account) -> Result<RpcResult, Error> {
    Ok(RpcResult::AccountConstructs(account_constructs(tx, &account)?))
}

fn handle_account_instances(_data: Vec<u8>, tx: &mut Transaction, account: &Account) -> Result<RpcResult, Error> {
    Ok(RpcResult::AccountInstances(account_instances(tx, &account)?))
}

fn handle_instance_new(data: Vec<u8>, tx: &mut Transaction, account: &Account) -> Result<RpcResult, Error> {
    let msg = from_slice::<InstanceLobbyMsg>(&data).or(Err(err_msg("invalid params")))?;
    Ok(RpcResult::InstanceState(instance_new(msg.params, tx, &account)?))
}

fn handle_instance_ready(data: Vec<u8>, tx: &mut Transaction, account: &Account) -> Result<RpcResult, Error> {
    let msg = from_slice::<InstanceReadyMsg>(&data).or(Err(err_msg("invalid params")))?;
    Ok(RpcResult::InstanceState(instance_ready(msg.params, tx, &account)?))
}

fn handle_instance_join(data: Vec<u8>, tx: &mut Transaction, account: &Account) -> Result<RpcResult, Error> {
    let msg = from_slice::<InstanceJoinMsg>(&data).or(Err(err_msg("invalid params")))?;
    Ok(RpcResult::InstanceState(instance_join(msg.params, tx, &account)?))
}

fn handle_instance_list(_data: Vec<u8>, tx: &mut Transaction, _account: &Account) -> Result<RpcResult, Error> {
    Ok(RpcResult::OpenInstances(instance_list(tx)?))
}


fn handle_instance_state(data: Vec<u8>, tx: &mut Transaction, account: &Account) -> Result<RpcResult, Error> {
    let msg = from_slice::<InstanceStateMsg>(&data).or(Err(err_msg("invalid params")))?;
    match instance_state(msg.params, tx, &account)? {
        RpcResult::GameState(p) => Ok(RpcResult::GameState(p)),
        RpcResult::InstanceState(p) => Ok(RpcResult::InstanceState(p)),
        _ => Err(err_msg("unhandled instance state"))
    }
}

fn handle_vbox_accept(data: Vec<u8>, tx: &mut Transaction, account: &Account) -> Result<RpcResult, Error> {
    let msg = from_slice::<VboxAcceptMsg>(&data).or(Err(err_msg("invalid params")))?;
    Ok(RpcResult::InstanceState(vbox_accept(msg.params, tx, &account)?))
}

fn handle_vbox_discard(data: Vec<u8>, tx: &mut Transaction, account: &Account) -> Result<RpcResult, Error> {
    let msg = from_slice::<VboxDiscardMsg>(&data).or(Err(err_msg("invalid params")))?;
    Ok(RpcResult::InstanceState(vbox_discard(msg.params, tx, &account)?))
}


fn handle_vbox_combine(data: Vec<u8>, tx: &mut Transaction, account: &Account) -> Result<RpcResult, Error> {
    let msg = from_slice::<VboxCombineMsg>(&data).or(Err(err_msg("invalid params")))?;
    Ok(RpcResult::InstanceState(vbox_combine(msg.params, tx, &account)?))
}

fn handle_vbox_apply(data: Vec<u8>, tx: &mut Transaction, account: &Account) -> Result<RpcResult, Error> {
    let msg = from_slice::<VboxApplyMsg>(&data).or(Err(err_msg("invalid params")))?;
    Ok(RpcResult::InstanceState(vbox_apply(msg.params, tx, &account)?))
}

fn handle_vbox_reclaim(data: Vec<u8>, tx: &mut Transaction, account: &Account) -> Result<RpcResult, Error> {
    let msg = from_slice::<VboxReclaimMsg>(&data).or(Err(err_msg("invalid params")))?;
    Ok(RpcResult::InstanceState(vbox_reclaim(msg.params, tx, &account)?))
}

fn handle_vbox_unequip(data: Vec<u8>, tx: &mut Transaction, account: &Account) -> Result<RpcResult, Error> {
    let msg = from_slice::<VboxUnequipMsg>(&data).or(Err(err_msg("invalid params")))?;
    Ok(RpcResult::InstanceState(vbox_unequip(msg.params, tx, &account)?))
}

fn handle_dev_resolve(data: Vec<u8>) -> Result<RpcResult, Error> {
    let msg = from_slice::<DevResolveMsg>(&data).or(Err(err_msg("invalid params")))?;
    Ok(RpcResult::DevResolutions(dev_resolve(msg.params.a, msg.params.b, msg.params.skill)))
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub struct RpcErrorResponse {
    pub err: String
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub enum RpcResult {
    AccountState(Account),
    AccountConstructs(Vec<Construct>),
    AccountInstances(Vec<Instance>),
    GameState(Game),
    ItemInfo(ItemInfoCtr),

    OpenInstances(Vec<Instance>),
    InstanceState(Instance),

    Pong(()),

    DevResolutions(Resolutions),
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub struct RpcMessage {
    method: String,
    token: Option<String>,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
struct ConstructSpawnMsg {
    method: String,
    params: ConstructSpawnParams,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub struct ConstructSpawnParams {
    pub name: String,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
struct ConstructDeleteMsg {
    method: String,
    params: ConstructDeleteParams,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub struct ConstructDeleteParams {
    pub id: Uuid,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
struct GameStateMsg {
    method: String,
    params: GameStateParams,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub struct GameStateParams {
    pub id: Uuid,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
struct GameSkillMsg {
    method: String,
    params: GameSkillParams,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub struct GameSkillParams {
    pub game_id: Uuid,
    pub construct_id: Uuid,
    pub target_construct_id: Option<Uuid>,
    pub skill: Skill,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
struct AccountCreateMsg {
    method: String,
    params: AccountCreateParams,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub struct AccountCreateParams {
    pub name: String,
    pub password: String,
    pub code: String,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
struct AccountLoginMsg {
    method: String,
    params: AccountLoginParams,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub struct AccountLoginParams {
    pub name: String,
    pub password: String,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
struct AccountConstructsMsg {
    method: String,
    params: (),
}

#[derive(Debug,Clone,Serialize,Deserialize)]
struct InstanceLobbyMsg {
    method: String,
    params: InstanceLobbyParams,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub struct InstanceLobbyParams {
    pub construct_ids: Vec<Uuid>,
    pub name: String,
    pub pve: bool,
    pub password: Option<String>,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
struct InstanceJoinMsg {
    method: String,
    params: InstanceJoinParams,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub struct InstanceJoinParams {
    pub instance_id: Uuid,
    pub construct_ids: Vec<Uuid>,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
struct InstanceReadyMsg {
    method: String,
    params: InstanceReadyParams,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub struct InstanceReadyParams {
    pub instance_id: Uuid,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
struct InstanceStateMsg {
    method: String,
    params: InstanceStateParams,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub struct InstanceStateParams {
    pub instance_id: Uuid,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
struct VboxAcceptMsg {
    method: String,
    params: VboxAcceptParams,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub struct VboxAcceptParams {
    pub instance_id: Uuid,
    pub group: usize,
    pub index: usize,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
struct VboxDiscardMsg {
    method: String,
    params: VboxDiscardParams,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub struct VboxDiscardParams {
    pub instance_id: Uuid,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
struct VboxCombineMsg {
    method: String,
    params: VboxCombineParams,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub struct VboxCombineParams {
    pub instance_id: Uuid,
    pub indices: Vec<usize>,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
struct VboxApplyMsg {
    method: String,
    params: VboxApplyParams,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub struct VboxApplyParams {
    pub instance_id: Uuid,
    pub construct_id: Uuid,
    pub index: usize,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
struct VboxUnequipMsg {
    method: String,
    params: VboxUnequipParams,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub struct VboxUnequipParams {
    pub instance_id: Uuid,
    pub construct_id: Uuid,
    pub target: Item,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
struct VboxReclaimMsg {
    method: String,
    params: VboxReclaimParams,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub struct VboxReclaimParams {
    pub instance_id: Uuid,
    pub index: usize,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
struct DevResolveMsg {
    method: String,
    params: DevResolveParams,
}

#[derive(Debug,Clone,Serialize,Deserialize)]
pub struct DevResolveParams {
    pub a: Uuid,
    pub b: Uuid,
    pub skill: Skill,
}

// #[cfg(test)]
// mod tests {
//     use super::*;
//     use serde_cbor::to_vec;
//     #[test]
//     fn rpc_parse() {
//         let rpc = Rpc {};
//         let msg = GenerateMsg { method: "construct_generate".to_string(), params: GenerateParams { level: 64 }  };
//         let v = to_vec(&msg).unwrap();
//         let received = rpc.receive(Message::Binary(v));
//     }
// }