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app.py

@@ -294,25 +294,55 @@ async def get_asset_detail(asset_id: str, db: Session = Depends(get_db)):
         raise HTTPException(status_code=404, detail=f"Asset {asset_id} not found. Visit /api/debug/seed to populate demo data.")
     return asset.to_dict()
 
+@app.get("/api/assets/{asset_id}/history")
+async def get_asset_history(asset_id: str, db: Session = Depends(get_db)):
+    """Get historical health predictions for an asset."""
+    asset = db.query(Asset).filter((Asset.id == asset_id) | (Asset.asset_id == asset_id)).first()
+    if not asset:
+        raise HTTPException(status_code=404, detail="Asset not found")
+        
+    predictions = db.query(HealthPrediction)\
+        .filter(HealthPrediction.asset_id == asset.id)\
+        .order_by(HealthPrediction.cycle_index)\
+        .all()
+    return [p.to_dict() for p in predictions]
+
 @app.get("/api/debug/seed")
 async def seed_database(db: Session = Depends(get_db)):
-    """Seed cloud database with NASA demo assets."""
+    """Seed cloud database with a full fleet of NASA demo assets and history."""
     try:
-        existing = db.query(Asset).filter(Asset.asset_id == "BESS_01").first()
-        if existing: return {"message": "Database already seeded", "asset_id": "BESS_01"}
+        db.query(HealthPrediction).delete()
+        db.query(Asset).delete()
+        
+        assets_to_create = [
+            {"asset_id": "BESS_01", "name": "NASA PCoE ESS-01", "stage": "Certified", "health": 94.2, "life": 1.5, "loc": "Mountain View, CA"},
+            {"asset_id": "BESS_02", "name": "Stanford R&D Unit B2", "stage": "Monitoring", "health": 88.7, "life": 4.2, "loc": "Stanford, CA"},
+            {"asset_id": "BESS_03", "name": "Legacy Storage Cell C4", "stage": "Monitoring", "health": 68.5, "life": 0.8, "loc": "Fremont, CA"}
+        ]
+
+        for a in assets_to_create:
+            uid = str(uuid.uuid4())
+            db.add(Asset(
+                id=uid, owner_id="demo_user", project_name=a["name"],
+                asset_id=a["asset_id"], location=a["loc"], capacity=100.0,
+                bms_provider="ZenVolt Native", category=json.dumps(["Grid-Scale"]),
+                project_stage=a["stage"], health_score=a["health"], 
+                remaining_life=a["life"], degradation_rate=2.4, 
+                confidence=0.94, is_online=1
+            ))
+            
+            for i in range(1, 11):
+                cycle = i * 10
+                h = a["health"] + (11-i)*0.4
+                db.add(HealthPrediction(
+                    asset_id=uid, cycle_index=cycle, health_score=round(h, 2),
+                    current_soh=round(h/100, 4), prediction_date=datetime.utcnow()
+                ))
         
-        demo_id = str(uuid.uuid4())
-        new_asset = Asset(
-            id=demo_id, owner_id="demo_user", project_name="NASA PCoE ESS-01",
-            asset_id="BESS_01", location="Mountain View, CA", capacity=100.0,
-            bms_provider="ZenVolt Native", category=json.dumps(["Grid-Scale", "Lithium-Ion"]),
-            project_stage="Certified", health_score=94.2, remaining_life=1.5,
-            degradation_rate=2.4, confidence=0.94, is_online=1
-        )
-        db.add(new_asset)
         db.commit()
-        return {"message": "Success! Demo database populated.", "status": "201 Created"}
+        return {"message": "Success! Full fleet + history seeded.", "status": "201 Created"}
     except Exception as e:
+        db.rollback()
         return {"error": str(e)}
 
 if __name__ == "__main__":