fix for buildinds

routes/api.py

@@ -105,10 +105,11 @@ def receive_state():
 # so both queues are served in parallel without blocking each other.
 # ------------------------------------------------------------------
 def _fetch_pending_of_type(c, cmd_type, player_id):
+    """Fetch a single oldest pending command of a given type (recruit, market, etc.)."""
     row = c.execute('''
         SELECT * FROM commands
         WHERE status = 'pending' AND type = ? AND player_id = ?
-        ORDER BY id ASC
+        ORDER BY updated_at ASC, id ASC
         LIMIT 1
     ''', (cmd_type, player_id)).fetchone()
     if not row:
@@ -125,6 +126,49 @@ def _fetch_pending_of_type(c, cmd_type, player_id):
         'payload': json.loads(row['payload'])
     }
 
+
+def _fetch_pending_builds_all_towns(c, player_id):
+    """
+    Fetch ONE pending 'build' command per distinct town_id.
+    This allows all towns to build in parallel within a single poll cycle.
+    Within each town the oldest-updated command is picked first, so requeued
+    commands (updated_at = now) naturally sort behind fresh ones.
+    """
+    # Get every town that has at least one pending build, ordered by
+    # which town has been waiting longest (MIN updated_at across its commands).
+    town_rows = c.execute('''
+        SELECT town_id
+        FROM commands
+        WHERE status = 'pending' AND type = 'build' AND player_id = ?
+        GROUP BY town_id
+        ORDER BY MIN(updated_at) ASC
+    ''', (player_id,)).fetchall()
+
+    results = []
+    now = datetime.utcnow().isoformat()
+    for town_row in town_rows:
+        town_id = town_row['town_id']
+        row = c.execute('''
+            SELECT * FROM commands
+            WHERE status = 'pending' AND type = 'build'
+              AND player_id = ? AND town_id = ?
+            ORDER BY updated_at ASC, id ASC
+            LIMIT 1
+        ''', (player_id, town_id)).fetchone()
+        if not row:
+            continue
+        c.execute('''
+            UPDATE commands SET status = 'executing', updated_at = ?
+            WHERE id = ?
+        ''', (now, row['id']))
+        results.append({
+            'id':      row['id'],
+            'town_id': row['town_id'],
+            'type':    row['type'],
+            'payload': json.loads(row['payload'])
+        })
+    return results
+
 @api.route('/api/commands/pending', methods=['GET'])
 def get_pending_command():
     player_id = request.args.get('player_id')
@@ -134,7 +178,7 @@ def get_pending_command():
     conn = get_db()
     c = conn.cursor()
 
-    build_cmd        = _fetch_pending_of_type(c, 'build', player_id)
+    build_cmds       = _fetch_pending_builds_all_towns(c, player_id)  # one per town
     recruit_cmd      = _fetch_pending_of_type(c, 'recruit', player_id)
     market_cmd       = _fetch_pending_of_type(c, 'market_offer', player_id)
     farm_cmd         = _fetch_pending_of_type(c, 'farm_loot', player_id)
@@ -164,7 +208,7 @@ def get_pending_command():
     conn.close()
 
     return jsonify({
-        'build':            build_cmd,
+        'builds':           build_cmds,      # list: one build command per town
         'recruit':          recruit_cmd,
         'market':           market_cmd,
         'research':         research_cmd,