use tokio::sync::oneshot;

use crate::managers::OptionUpdate;
use crate::models::OrderForm;

#[derive(Debug)]
pub struct ActorMessage {
    pub(crate) message: Message,
    pub(crate) respond_to: oneshot::Sender<OptionUpdate>,
}

#[derive(Debug)]
pub enum Message {
    Update { tick: u64 },
    ClosePosition { position_id: u64 },
    SubmitOrder { order: OrderForm },
}

#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
pub struct EventMetadata {
    position_id: Option<u64>,
    order_id: Option<u64>,
}

impl EventMetadata {
    pub fn new(position_id: Option<u64>, order_id: Option<u64>) -> Self {
        EventMetadata {
            position_id,
            order_id,
        }
    }
}

#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
pub enum EventKind {
    NewMinimum,
    NewMaximum,
    ReachedLoss,
    ReachedBreakEven,
    ReachedMinProfit,
    ReachedGoodProfit,
    ReachedMaxLoss,
    TrailingStopSet,
    TrailingStopMoved,
    OrderSubmitted,
    NewTick,
    Any,
}

#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
pub struct Event {
    kind: EventKind,
    tick: u64,
    metadata: Option<EventMetadata>,
}

impl Event {
    pub fn new(kind: EventKind, tick: u64, metadata: Option<EventMetadata>) -> Self {
        Event {
            kind,
            tick,
            metadata,
        }
    }

    fn has_metadata(&self) -> bool {
        self.metadata.is_some()
    }

    pub fn kind(&self) -> EventKind {
        self.kind
    }
    pub fn tick(&self) -> u64 {
        self.tick
    }
    pub fn metadata(&self) -> Option<EventMetadata> {
        self.metadata
    }
}
//
// pub struct Dispatcher {
//     event_handlers: HashMap<EventKind, Vec<Box<dyn Fn(&Event, &PriceManager) -> JoinHandle<()>>>>,
//     profit_state_handlers:
//         HashMap<PositionProfitState, Vec<Box<dyn Fn(&Position, &PriceManager) -> JoinHandle<()>>>>,
//     signal_handlers: HashMap<SignalKind, Vec<Box<dyn Fn(&SignalKind) -> JoinHandle<()>>>>,
//
//     on_any_event_handlers: Vec<Box<dyn Fn(&Event, &PriceManager) -> JoinHandle<()>>>,
//     on_any_profit_state_handlers: Vec<Box<dyn Fn(&Position, &PriceManager) -> JoinHandle<()>>>,
// }
//
// impl Dispatcher {
//     pub fn new() -> Self {
//         Dispatcher {
//             event_handlers: HashMap::new(),
//             profit_state_handlers: HashMap::new(),
//             signal_handlers: HashMap::new(),
//             on_any_event_handlers: Vec::new(),
//             on_any_profit_state_handlers: Vec::new(),
//         }
//     }
//
//     pub fn call_signal_handlers(&self, signal: &SignalKind) {
//         if let Some(functions) = self.signal_handlers.get(&signal) {
//             for f in functions {
//                 f(signal);
//             }
//         }
//     }
//
//     pub fn call_event_handlers(&self, event: &Event, status: &PriceManager) {
//         if let Some(functions) = self.event_handlers.get(&event.kind()) {
//             for f in functions {
//                 f(event, status);
//             }
//         }
//
//         for f in &self.on_any_event_handlers {
//             f(event, status);
//         }
//     }
//
//     pub fn call_position_state_handlers(&self, position: &Position, status: &PriceManager) {
//         if let Some(profit_state) = &position.profit_state() {
//             if let Some(functions) = self.profit_state_handlers.get(profit_state) {
//                 for f in functions {
//                     f(position, status);
//                 }
//             }
//         }
//
//         for f in &self.on_any_profit_state_handlers {
//             f(position, status);
//         }
//     }
//
//     pub fn register_event_handler<F: 'static, Fut: 'static>(&mut self, event: EventKind, f: F)
//     where
//         F: Fn(&Event, &PriceManager) -> Fut,
//         Fut: Future<Output = ()> + Send,
//     {
//         match event {
//             EventKind::Any => self
//                 .on_any_event_handlers
//                 .push(Box::new(move |e, s| tokio::spawn(f(&e, s)))),
//             _ => self
//                 .event_handlers
//                 .entry(event)
//                 .or_default()
//                 .push(Box::new(move |e, s| tokio::spawn(f(&e, s)))),
//         }
//     }
//
//     pub fn register_positionstate_handler<F: 'static, Fut: 'static>(
//         &mut self,
//         state: PositionProfitState,
//         f: F,
//     ) where
//         F: Fn(&Position, &PriceManager) -> Fut,
//         Fut: Future<Output = ()> + Send,
//     {
//         match state {
//             // PositionProfitState::Any => self
//             //     .on_any_position_state_handlers
//             //     .push(Box::new(move |p, s| tokio::spawn(f(&p, s)))),
//             _ => self
//                 .profit_state_handlers
//                 .entry(state)
//                 .or_default()
//                 .push(Box::new(move |p, s| tokio::spawn(f(&p, s)))),
//         }
//     }
//
//     pub fn register_signal_handler<F: 'static, Fut: 'static>(&mut self, signal: SignalKind, f: F)
//     where
//         F: Fn(&SignalKind) -> Fut,
//         Fut: Future<Output = ()> + Send,
//     {
//         match signal {
//             // PositionProfitState::Any => self
//             //     .on_any_position_state_handlers
//             //     .push(Box::new(move |p, s| tokio::spawn(f(&p, s)))),
//             _ => self
//                 .signal_handlers
//                 .entry(signal)
//                 .or_default()
//                 .push(Box::new(move |s| tokio::spawn(f(s)))),
//         }
//     }
// }