Throttle request report refreshes and add retries

lib/tradovate-class.ts

@@ -40,8 +40,11 @@ export class TradovateClient {
 
     /** True once fetchDaysTraded() has finished its last full run */
     public fetchDaysComplete = false;
-    /** NodeJS.Timeout handle for the hourly dailyPnL refresh */
-    private daysFetchInterval: ReturnType<typeof setInterval> | null = null;
+    /** Prevent overlapping report fetches and throttle them to hourly cadence with retry backoff. */
+    private daysFetchInFlight = false;
+    private lastDaysFetchStartedAt = 0;
+    private lastDaysFetchSucceededAt = 0;
+    private nextDaysFetchRetryAt = 0;
     /** Interval handles tracked so they can be cleared on reconnect */
     private syncInterval: ReturnType<typeof setInterval> | null = null;
     private heartbeatInterval: ReturnType<typeof setInterval> | null = null;
@@ -315,14 +318,7 @@ export class TradovateClient {
 
                 console.log(`[requestSync] ${this.accountList.length} account(s), ${Object.keys(this.accountCashBalances).length} balance(s)`);
 
-                this.fetchDaysTraded();
-
-                // Refresh daily P&L once per hour — avoids hammering the reports API
-                if (this.daysFetchInterval) clearInterval(this.daysFetchInterval);
-                this.daysFetchInterval = setInterval(
-                    () => this.fetchDaysTraded().catch((err) => console.error('[hourly fetchDaysTraded]', err)),
-                    60 * 60 * 1_000
-                );
+                this.maybeFetchDaysTraded();
 
                 if (this.products.length > 0) {
                     this.syncComplete = true;
@@ -347,9 +343,53 @@ export class TradovateClient {
         this.ws.send('user/syncrequest\n3\n\n{"splitResponses":false}');
     }
 
-    public async fetchDaysTraded(): Promise<void> {
-        if (!this.accessInfo?.accessToken) return;
+    private maybeFetchDaysTraded(): void {
+        if (this.daysFetchInFlight) return;
+
+        const now = Date.now();
+        const initialFetchDue = this.lastDaysFetchStartedAt === 0;
+        const retryPending = this.nextDaysFetchRetryAt > 0;
+        const retryDue = retryPending && now >= this.nextDaysFetchRetryAt;
+        const hourlyRefreshDue =
+            !retryPending &&
+            this.lastDaysFetchSucceededAt > 0 &&
+            now - this.lastDaysFetchSucceededAt >= 60 * 60 * 1_000;
+
+        if (!initialFetchDue && !retryDue && !hourlyRefreshDue) return;
+
+        const reason = retryDue
+            ? 'retry after failure'
+            : initialFetchDue
+                ? 'initial sync'
+                : 'hourly refresh';
+
+        this.daysFetchInFlight = true;
+        this.lastDaysFetchStartedAt = now;
+        if (retryDue) this.nextDaysFetchRetryAt = 0;
+
+        this.fetchDaysTraded()
+            .then(({ failedAccounts }) => {
+                if (failedAccounts > 0) {
+                    this.nextDaysFetchRetryAt = Date.now() + 5 * 60 * 1_000;
+                    console.warn(`[fetchDaysTraded] ${failedAccounts} account(s) failed during ${reason} — retrying in 5 minutes`);
+                    return;
+                }
+
+                this.lastDaysFetchSucceededAt = Date.now();
+            })
+            .catch((err) => {
+                this.nextDaysFetchRetryAt = Date.now() + 5 * 60 * 1_000;
+                console.error(`[fetchDaysTraded] ${reason} failed — retrying in 5 minutes`, err);
+            })
+            .finally(() => {
+                this.daysFetchInFlight = false;
+            });
+    }
+
+    public async fetchDaysTraded(): Promise<{ failedAccounts: number }> {
+        if (!this.accessInfo?.accessToken) return { failedAccounts: 0 };
         this.fetchDaysComplete = false;
+        let failedAccounts = 0;
 
         const authHeaders = { Authorization: `Bearer ${this.accessInfo.accessToken}` };
 
@@ -533,6 +573,7 @@ export class TradovateClient {
             } catch (err) {
                 const msg = err instanceof Error ? err.message : String(err);
                 console.error(`[fetchDaysTraded] both reports failed for ${account.name}:`, msg);
+                failedAccounts++;
                 // Cache already loaded and filtered at top of loop — just log the error
                 if (cached.length > 0) {
                     this.lastFetchErrors[account.name] = `${msg} (using ${cached.length} cached entries from database)`;
@@ -545,6 +586,7 @@ export class TradovateClient {
             }
         }
         this.fetchDaysComplete = true;
+        return { failedAccounts };
     }
 
     private async login(): Promise<AuthLoginResponse> {
@@ -798,7 +840,8 @@ export class TradovateClient {
         if (this.syncInterval) { clearInterval(this.syncInterval); this.syncInterval = null; }
         if (this.heartbeatInterval) { clearInterval(this.heartbeatInterval); this.heartbeatInterval = null; }
         if (this.tokenRenewalInterval) { clearInterval(this.tokenRenewalInterval); this.tokenRenewalInterval = null; }
-        if (this.daysFetchInterval) { clearInterval(this.daysFetchInterval); this.daysFetchInterval = null; }
+        this.daysFetchInFlight = false;
+        this.nextDaysFetchRetryAt = 0;
         try { this.ws?.close(); } catch { /* ignore */ }
     }