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use serde::{Deserialize, Serialize};

use geom::Duration;
use map_model::{
    BuildingID, BusRouteID, BusStopID, CompressedMovementID, IntersectionID, LaneID, Map, Path,
    PathRequest, Traversable,
};

use crate::{
    AgentID, CarID, OffMapLocation, ParkingSpot, PedestrianID, PersonID, TripID, TripMode,
};

// Many of these were created for a test framework that's been abandoned. They could be removed or
// have their API adjusted, but it's not urgent; publishing an event that's not used by Analytics
// has no performance impact.
#[derive(Debug, PartialEq, Clone, Serialize, Deserialize)]
pub enum Event {
    CarReachedParkingSpot(CarID, ParkingSpot),
    CarLeftParkingSpot(CarID, ParkingSpot),

    BusArrivedAtStop(CarID, BusRouteID, BusStopID),
    BusDepartedFromStop(CarID, BusRouteID, BusStopID),
    // How long waiting at the stop?
    PassengerBoardsTransit(PersonID, CarID, BusRouteID, BusStopID, Duration),
    PassengerAlightsTransit(PersonID, CarID, BusRouteID, BusStopID),

    PersonEntersBuilding(PersonID, BuildingID),
    PersonLeavesBuilding(PersonID, BuildingID),
    // None if cancelled
    PersonLeavesMap(
        PersonID,
        Option<AgentID>,
        IntersectionID,
        Option<OffMapLocation>,
    ),
    PersonEntersMap(PersonID, AgentID, IntersectionID, Option<OffMapLocation>),
    PersonEntersRemoteBuilding(PersonID, OffMapLocation),
    PersonLeavesRemoteBuilding(PersonID, OffMapLocation),

    PedReachedParkingSpot(PedestrianID, ParkingSpot),

    BikeStoppedAtSidewalk(CarID, LaneID),

    // If the agent is a transit vehicle, then include a count of how many passengers are on
    // board.
    AgentEntersTraversable(AgentID, Traversable, Option<usize>),
    IntersectionDelayMeasured(CompressedMovementID, Duration, AgentID),

    TripFinished {
        trip: TripID,
        mode: TripMode,
        total_time: Duration,
        blocked_time: Duration,
    },
    TripCancelled(TripID),
    TripPhaseStarting(TripID, PersonID, Option<PathRequest>, TripPhaseType),

    // Just use for parking replanning. Not happy about copying the full path in here, but the way
    // to plumb info into Analytics is Event.
    PathAmended(Path),

    Alert(AlertLocation, String),
}

#[derive(Debug, PartialEq, Clone, Serialize, Deserialize)]
pub enum AlertLocation {
    Nil,
    Intersection(IntersectionID),
    Person(PersonID),
    Building(BuildingID),
}

#[derive(Debug, PartialEq, Clone, Copy, Serialize, Deserialize)]
pub enum TripPhaseType {
    Driving,
    Walking,
    Biking,
    Parking,
    WaitingForBus(BusRouteID, BusStopID),
    // What stop did they board at?
    RidingBus(BusRouteID, BusStopID, CarID),
    Cancelled,
    Finished,
    DelayedStart,
    Remote,
}

impl TripPhaseType {
    pub fn describe(self, map: &Map) -> String {
        match self {
            TripPhaseType::Driving => "driving".to_string(),
            TripPhaseType::Walking => "walking".to_string(),
            TripPhaseType::Biking => "biking".to_string(),
            TripPhaseType::Parking => "parking".to_string(),
            TripPhaseType::WaitingForBus(r, _) => {
                format!("waiting for bus {}", map.get_br(r).full_name)
            }
            TripPhaseType::RidingBus(r, _, _) => format!("riding bus {}", map.get_br(r).full_name),
            TripPhaseType::Cancelled => "trip cancelled due to some bug".to_string(),
            TripPhaseType::Finished => "trip finished".to_string(),
            TripPhaseType::DelayedStart => "delayed by previous trip taking too long".to_string(),
            TripPhaseType::Remote => "remote trip outside the map boundaries".to_string(),
        }
    }
}