From 29f7d05800a0c991c6e60423c1bef52f8c79cf87 Mon Sep 17 00:00:00 2001
From: Marshal <marshal@example.com>
Date: Thu, 6 Aug 2026 23:18:48 +0000
Subject: [PATCH] allow create inside lead window

---
 .../train-scheduling.service.ts               | 26 +++++++------------
 1 file changed, 9 insertions(+), 17 deletions(-)

diff --git a/apps/edr-freight-api/src/modules/train-scheduling/train-scheduling.service.ts b/apps/edr-freight-api/src/modules/train-scheduling/train-scheduling.service.ts
index df5c44fde..e8ed6ff4b 100644
--- a/apps/edr-freight-api/src/modules/train-scheduling/train-scheduling.service.ts
+++ b/apps/edr-freight-api/src/modules/train-scheduling/train-scheduling.service.ts
@@ -1546,23 +1546,10 @@ export class TrainSchedulingService {
           }
         : globalCfg;
 
-      // Staff cannot schedule inside the lead window — there must be room for a
-      // booking window before departure. IMPORT/DOMESTIC lead is in whole EAT
-      // days (lead 3, today 11th → first allowed departure is the 14th); EXPORT
-      // lead is in hours (24h = 1 day ahead). Checked against the schedule's OWN
-      // lead, so a custom lead is honoured rather than rejected by the global one.
-      const earliest = earliestSchedulableDeparture(direction, windowCfg, new Date());
-      if (departure.getTime() < earliest.getTime()) {
-        const detail =
-          direction === 'EXPORT'
-            ? `at least ${windowCfg.exportBookingLeadHours} hour(s) ahead`
-            : `at least ${windowCfg.importWindowLeadDays} day(s) ahead`;
-        throw new BadRequestException(
-          `Departure ${departure.toISOString()} is inside the booking lead window; ` +
-            `${direction === 'EXPORT' ? 'export' : 'import'} trains must be scheduled ${detail} ` +
-            `(earliest ${earliest.toISOString()})`,
-        );
-      }
+      // Short-notice trains are allowed: a departure inside the booking lead
+      // window is NOT rejected — the window just opens immediately (opensAt is
+      // clamped to `now` below) instead of waiting out a lead that has already
+      // passed. Only `updateScheduleDate` still enforces the lead floor.
 
       // Freeze the rule this schedule is born with. A later global-rules edit
       // only re-derives NOT-YET-OPEN schedules (see restampPendingWindows); an
@@ -1577,6 +1564,11 @@ export class TrainSchedulingService {
               ...ruleSnapshot,
               ...computeImportWindowTimes(departure, windowCfg, new Date()),
             };
+      // Inside-lead departure (e.g. a huge configured lead): the raw open lands
+      // in the past — clamp it to `now` so the window tick opens it immediately.
+      if (computedTimes.windowOpensAt.getTime() < Date.now()) {
+        computedTimes.windowOpensAt = new Date();
+      }
       if (
         computedTimes.windowOpensAt.getTime() >= computedTimes.windowClosesAt.getTime()
       ) {