From 145a8b336b29b6e45164b89705b1a84b718ced44 Mon Sep 17 00:00:00 2001
From: Fahri Can <fahricansecer@gmail.com>
Date: Sat, 2 May 2026 16:32:42 +0300
Subject: [PATCH] fix(feeder): preserve pre-match odds when match goes live
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Live odds have missing selections (e.g. '1' key removed from Maç Sonucu
after kickoff), causing the AI model to produce wildly incorrect predictions
(e.g. 3.5% home win for Bristol City). Two guards added:

1. fetchOddsForMatches: Exclude live/finished matches from odds fetch query
2. processMatchOdds: Skip odds/lineups/sidelined overwrite if match already
   has pre-match odds and is live/finished
---
 src/tasks/data-fetcher.task.ts | 47 +++++++++++++++++++++++++++++++++-
 1 file changed, 46 insertions(+), 1 deletion(-)

diff --git a/src/tasks/data-fetcher.task.ts b/src/tasks/data-fetcher.task.ts
index 82da6e1..01533cd 100755
--- a/src/tasks/data-fetcher.task.ts
+++ b/src/tasks/data-fetcher.task.ts
@@ -307,6 +307,9 @@ export class DataFetcherTask {
       const allowedLeagueIds = Array.from(new Set(topLeagueIds));
 
       // Get matches needing odds (from 12 hours ago onward)
+      // CRITICAL: Only fetch odds/lineups for NOT STARTED matches.
+      // Once a match goes live, odds selections disappear or change,
+      // corrupting the pre-match data the AI model relies on.
       const twelveHoursAgo = new Date(Date.now() - 12 * 60 * 60 * 1000);
 
       const matchesToFetch = await this.prisma.liveMatch.findMany({
@@ -315,6 +318,15 @@ export class DataFetcherTask {
           ...(allowedLeagueIds.length > 0
             ? { leagueId: { in: allowedLeagueIds } }
             : {}),
+          // Exclude live and finished matches — preserve their pre-match odds
+          NOT: {
+            OR: [
+              { status: { in: FINISHED_STATUS_VALUES_FOR_DB } },
+              { state: { in: FINISHED_STATE_VALUES_FOR_DB } },
+              { status: { in: LIVE_STATUS_VALUES_FOR_DB } },
+              { state: { in: LIVE_STATE_VALUES_FOR_DB } },
+            ],
+          },
         },
         include: {
           homeTeam: { select: { name: true } },
@@ -891,7 +903,40 @@ export class DataFetcherTask {
       }
     }
 
-    // ALWAYS update oddsUpdatedAt to ensure rotation
+    // Guard: If match already has pre-match odds and is now live/finished,
+    // do NOT overwrite odds/lineups/sidelined — the model needs stable pre-match data.
+    const matchState = match.state?.toLowerCase() ?? '';
+    const matchStatus = match.status?.toLowerCase() ?? '';
+    const liveStates = LIVE_STATE_VALUES_FOR_DB.map((s) => s.toLowerCase());
+    const liveStatuses = LIVE_STATUS_VALUES_FOR_DB.map((s) => s.toLowerCase());
+    const finishedStates = FINISHED_STATE_VALUES_FOR_DB.map((s) => s.toLowerCase());
+    const finishedStatuses = FINISHED_STATUS_VALUES_FOR_DB.map((s) => s.toLowerCase());
+
+    const isLiveOrFinished =
+      liveStates.includes(matchState) ||
+      liveStatuses.includes(matchStatus) ||
+      finishedStates.includes(matchState) ||
+      finishedStatuses.includes(matchStatus);
+
+    const existingOdds = match.odds as Record<string, unknown> | null;
+    const hasExistingOdds =
+      !!existingOdds &&
+      typeof existingOdds === 'object' &&
+      Object.keys(existingOdds).length > 0;
+
+    if (isLiveOrFinished && hasExistingOdds) {
+      // Match is live/finished and already has pre-match odds — skip data update
+      this.logger.debug(
+        `🛡️ Preserving pre-match data for ${match.matchName} (status: ${matchStatus}, state: ${matchState})`,
+      );
+      await this.prisma.liveMatch.update({
+        where: { id: match.id },
+        data: { oddsUpdatedAt: new Date() },
+      });
+      return;
+    }
+
+    // Update odds/lineups/sidelined for pre-match (NS) matches
     await this.prisma.liveMatch.update({
       where: { id: match.id },
       data: {