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import type { Passenger, Station } from '../lib/gameTypes'
import type { RailroadTrackGenerator } from '../lib/RailroadTrackGenerator'
export interface BoardingAnimation {
passenger: Passenger
fromX: number
fromY: number
toX: number
toY: number
carIndex: number
startTime: number
}
export interface DisembarkingAnimation {
passenger: Passenger
fromX: number
fromY: number
toX: number
toY: number
startTime: number
}
interface UsePassengerAnimationsParams {
passengers: Passenger[]
stations: Station[]
stationPositions: Array<{ x: number; y: number }>
trainPosition: number
trackGenerator: RailroadTrackGenerator
pathRef: React.RefObject<SVGPathElement>
}
export function usePassengerAnimations({
passengers,
stations,
stationPositions,
trainPosition,
trackGenerator,
pathRef,
}: UsePassengerAnimationsParams) {
const [boardingAnimations, setBoardingAnimations] = useState<Map<string, BoardingAnimation>>(
new Map()
)
const [disembarkingAnimations, setDisembarkingAnimations] = useState<
Map<string, DisembarkingAnimation>
>(new Map())
const previousPassengersRef = useRef<Passenger[]>(passengers)
// Detect passengers boarding/disembarking and start animations
useEffect(() => {
if (!pathRef.current || stationPositions.length === 0) return
const previousPassengers = previousPassengersRef.current
const currentPassengers = passengers
// Find newly boarded passengers
const newlyBoarded = currentPassengers.filter((curr) => {
const prev = previousPassengers.find((p) => p.id === curr.id)
return curr.isBoarded && prev && !prev.isBoarded
})
// Find newly delivered passengers
const newlyDelivered = currentPassengers.filter((curr) => {
const prev = previousPassengers.find((p) => p.id === curr.id)
return curr.isDelivered && prev && !prev.isDelivered
})
// Start animation for each newly boarded passenger
newlyBoarded.forEach((passenger) => {
// Find origin station
const originStation = stations.find((s) => s.id === passenger.originStationId)
if (!originStation) return
const stationIndex = stations.indexOf(originStation)
const stationPos = stationPositions[stationIndex]
if (!stationPos) return
// Find which car this passenger will be in
const boardedPassengers = currentPassengers.filter((p) => p.isBoarded && !p.isDelivered)
const carIndex = boardedPassengers.indexOf(passenger)
// Calculate train car position
const carPosition = Math.max(0, trainPosition - (carIndex + 1) * 7) // 7% spacing
const carTransform = trackGenerator.getTrainTransform(pathRef.current!, carPosition)
// Create boarding animation
const animation: BoardingAnimation = {
passenger,
fromX: stationPos.x,
fromY: stationPos.y - 30,
toX: carTransform.x,
toY: carTransform.y,
carIndex,
startTime: Date.now(),
}
setBoardingAnimations((prev) => {
const next = new Map(prev)
next.set(passenger.id, animation)
return next
})
// Remove animation after 800ms
setTimeout(() => {
setBoardingAnimations((prev) => {
const next = new Map(prev)
next.delete(passenger.id)
return next
})
}, 800)
})
// Start animation for each newly delivered passenger
newlyDelivered.forEach((passenger) => {
// Find destination station
const destinationStation = stations.find((s) => s.id === passenger.destinationStationId)
if (!destinationStation) return
const stationIndex = stations.indexOf(destinationStation)
const stationPos = stationPositions[stationIndex]
if (!stationPos) return
// Find which car this passenger was in (before delivery)
const prevBoardedPassengers = previousPassengers.filter((p) => p.isBoarded && !p.isDelivered)
const carIndex = prevBoardedPassengers.findIndex((p) => p.id === passenger.id)
if (carIndex === -1) return
// Calculate train car position at time of disembarking
const carPosition = Math.max(0, trainPosition - (carIndex + 1) * 7) // 7% spacing
const carTransform = trackGenerator.getTrainTransform(pathRef.current!, carPosition)
// Create disembarking animation (from car to station)
const animation: DisembarkingAnimation = {
passenger,
fromX: carTransform.x,
fromY: carTransform.y,
toX: stationPos.x,
toY: stationPos.y - 30,
startTime: Date.now(),
}
setDisembarkingAnimations((prev) => {
const next = new Map(prev)
next.set(passenger.id, animation)
return next
})
// Remove animation after 800ms
setTimeout(() => {
setDisembarkingAnimations((prev) => {
const next = new Map(prev)
next.delete(passenger.id)
return next
})
}, 800)
})
// Update ref
previousPassengersRef.current = currentPassengers
}, [passengers, stations, stationPositions, trainPosition, trackGenerator, pathRef])
return {
boardingAnimations,
disembarkingAnimations,
}
}
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