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import { EventEnvelope } from "@/api_fsb";
import { RootState } from "@/store";
import {
createEntityAdapter,
createSelector,
createSlice,
} from "@reduxjs/toolkit";
const eventAdapter = createEntityAdapter({
selectId: (model: EventEnvelope) => model.event_uuid!,
sortComparer: (a, b) => {
// ASC by timestamp
return a.timestamp!.localeCompare(b.timestamp!);
},
});
const grlEventsSlice = createSlice({
name: "grlEvents",
initialState: eventAdapter.getInitialState(),
reducers: {
addEvent: eventAdapter.addOne,
addEvents: eventAdapter.addMany,
upsertEvent: eventAdapter.upsertOne, // Add or Update
},
});
export const { addEvent, addEvents, upsertEvent } = grlEventsSlice.actions;
export const eventSelectors = eventAdapter.getSelectors(
(state: RootState) => state.events,
);
export const selectAllEvents = (state: RootState): EventEnvelope[] =>
eventSelectors.selectAll(state);
const BASE_SPEED = 40; // px/sec at idle
const MAX_SPEED = 380; // px/sec at surge
const RATE_WINDOW_MS = 10_000; // ms window to measure message frequency
const RATE_TO_SPEED = 55; // px/sec added per msg/sec
// --- Speed: derived from arrival rate of recent items ---
export const selectCurrentSpeed = createSelector(selectAllEvents, (items) => {
const now = Date.now();
const recentCount = items.filter((m) => {
const ts = new Date(m.timestamp!).getTime();
return now - ts < RATE_WINDOW_MS;
}).length;
const rate = recentCount / (RATE_WINDOW_MS / 1_000); // msgs/sec
return Math.min(BASE_SPEED + rate * RATE_TO_SPEED, MAX_SPEED);
});
export default grlEventsSlice.reducer;
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