Update engine.py

engine.py

@@ -226,6 +226,51 @@ def has_underlying_data(sql):
     cur = conn.cursor()
     return cur.execute(test_sql).fetchone() is not None
 
+def is_patient_summary_question(text):
+    t = text.lower()
+    return any(
+        phrase in t for phrase in [
+            "patient summary",
+            "patients summary",
+            "patient overview",
+            "summary of patients",
+            "give a patient summary",
+        ]
+    )
+
+# =========================
+# PATIENT SUMMARY
+# =========================
+
+def build_patient_summary():
+    cur = conn.cursor()
+
+    total = cur.execute(
+        "SELECT COUNT(*) FROM patients"
+    ).fetchone()[0]
+
+    genders = cur.execute(
+        "SELECT gender, COUNT(*) FROM patients GROUP BY gender"
+    ).fetchall()
+
+    msg = "Here’s a quick summary of patients:\n\n"
+    msg += f"• Total patients: {total}\n"
+
+    if genders:
+        msg += "• Gender distribution:\n"
+        for g, c in genders:
+            msg += f"  - {g}: {c}\n"
+
+    msg += (
+        "\nYou can also ask:\n"
+        "• Patients admitted by year\n"
+        "• Patient count by age\n"
+        "• Visit trends"
+    )
+
+    return msg
+
+
 # =========================
 # MAIN ENGINE
 # =========================
@@ -234,6 +279,16 @@ def process_question(question):
     global LAST_PROMPT_TYPE, LAST_SUGGESTED_DATE
 
     q = question.strip().lower()
+    
+    # Patient summary intent
+    if is_patient_summary_question(q):
+        return {
+            "status": "ok",
+            "message": build_patient_summary(),
+            "data": [],
+            "sql": None,
+            "note": None
+        }
 
     # Handle WHY questions
     if is_why_question(q) and LAST_PROMPT_TYPE == "NO_DATA":
@@ -311,7 +366,8 @@ def process_question(question):
             "status": "ok",
             "message": friendly("No data is available for that time period."),
             "note": f"Available data is only up to {LAST_SUGGESTED_DATE}.",
-            "data": []
+            "data": [],
+            "sql": None
         }
 
     if not rows: