Fix thread ID matching for email replies

supabase/functions/receive-inbound-email/index.ts

@@ -44,8 +44,8 @@ const handler = async (req: Request): Promise<Response> => {
     });
 
     // Extract thread ID from headers or inReplyTo
-    const threadId = headers['X-Thread-ID'] || 
-                     (inReplyTo ? inReplyTo.replace(/<|>/g, '').split('@')[0] : null);
+    let threadId = headers['X-Thread-ID'] || 
+                   (inReplyTo ? inReplyTo.replace(/<|>/g, '').split('@')[0] : null);
 
     if (!threadId) {
       edgeLogger.warn('Email missing thread ID', {
@@ -58,17 +58,68 @@ const handler = async (req: Request): Promise<Response> => {
       });
     }
 
-    // Find submission by thread_id
-    const { data: submission, error: submissionError } = await supabase
+    // Extract ticket number from thread_id (handles multiple formats)
+    // Formats: "TW-100000.uuid", "ticket-TW-100000", "TW-100000"
+    const ticketMatch = threadId.match(/(?:ticket-)?(TW-\d+)/i);
+    const ticketNumber = ticketMatch ? ticketMatch[1] : null;
+
+    edgeLogger.info('Thread ID extracted', {
+      requestId: tracking.requestId,
+      rawThreadId: threadId,
+      ticketNumber
+    });
+
+    // Find submission by thread_id or ticket_number
+    let submission = null;
+    let submissionError = null;
+
+    // Strategy 1: Try exact thread_id match
+    const { data: submissionByThreadId, error: error1 } = await supabase
       .from('contact_submissions')
-      .select('id, email, status')
+      .select('id, email, status, ticket_number')
       .eq('thread_id', threadId)
-      .single();
+      .maybeSingle();
+
+    if (submissionByThreadId) {
+      submission = submissionByThreadId;
+    } else if (ticketNumber) {
+      // Strategy 2: Try ticket_number match
+      const { data: submissionByTicket, error: error2 } = await supabase
+        .from('contact_submissions')
+        .select('id, email, status, ticket_number, thread_id')
+        .eq('ticket_number', ticketNumber)
+        .maybeSingle();
+      
+      if (submissionByTicket) {
+        submission = submissionByTicket;
+        
+        // Update thread_id if it's null or in old format
+        if (!submissionByTicket.thread_id || submissionByTicket.thread_id !== threadId) {
+          await supabase
+            .from('contact_submissions')
+            .update({ thread_id: threadId })
+            .eq('id', submissionByTicket.id);
+          
+          edgeLogger.info('Updated submission thread_id', {
+            requestId: tracking.requestId,
+            submissionId: submissionByTicket.id,
+            oldThreadId: submissionByTicket.thread_id,
+            newThreadId: threadId
+          });
+        }
+      } else {
+        submissionError = error2;
+      }
+    } else {
+      submissionError = error1;
+    }
 
     if (submissionError || !submission) {
       edgeLogger.warn('Submission not found for thread ID', {
         requestId: tracking.requestId,
-        threadId
+        threadId,
+        ticketNumber,
+        error: submissionError
       });
       return new Response(JSON.stringify({ success: false, reason: 'submission_not_found' }), {
         status: 200,