Start fixing forecast service API 12

services/training/app/api/models.py

@@ -2,14 +2,14 @@
 Models API endpoints
 """
 
-from fastapi import APIRouter, Depends, HTTPException, status, Path
+from fastapi import APIRouter, Depends, HTTPException, status, Path, Query
 from sqlalchemy.ext.asyncio import AsyncSession
-from typing import List
+from typing import List, Optional
 import structlog
 from sqlalchemy import text
 
 from app.core.database import get_db
-from app.schemas.training import TrainedModelResponse
+from app.schemas.training import TrainedModelResponse, ModelMetricsResponse
 from app.services.training_service import TrainingService
 from datetime import datetime
 
@@ -70,7 +70,7 @@ async def get_active_model(
         await db.commit()
         
         return {
-            "model_id": model_record.id,
+            "model_id": model_record.id,  # ✅ This is the correct field name
             "model_path": model_record.model_path,
             "features_used": model_record.features_used,
             "hyperparameters": model_record.hyperparameters,
@@ -92,4 +92,124 @@ async def get_active_model(
         raise HTTPException(
             status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
             detail="Failed to retrieve model"
+        )
+
+@router.get("/tenants/{tenant_id}/models/{model_id}/metrics", response_model=ModelMetricsResponse)
+async def get_model_metrics(
+    model_id: str = Path(..., description="Model ID"),
+    db: AsyncSession = Depends(get_db)
+):
+    """
+    Get performance metrics for a specific model - used by forecasting service
+    """
+    try:
+        # Query the model by ID
+        query = text("""
+            SELECT * FROM trained_models 
+            WHERE id = :model_id
+        """)
+        
+        result = await db.execute(query, {"model_id": model_id})
+        model_record = result.fetchone()
+        
+        if not model_record:
+            raise HTTPException(
+                status_code=status.HTTP_404_NOT_FOUND,
+                detail=f"Model {model_id} not found"
+            )
+        
+        # Return metrics in the format expected by forecasting service
+        metrics = {
+            "model_id": model_record.id,
+            "accuracy": model_record.r2_score or 0.0,  # Use R2 as accuracy measure
+            "mape": model_record.mape or 0.0,
+            "mae": model_record.mae or 0.0,
+            "rmse": model_record.rmse or 0.0,
+            "r2_score": model_record.r2_score or 0.0,
+            "training_samples": model_record.training_samples or 0,
+            "features_used": model_record.features_used or [],
+            "model_type": model_record.model_type,
+            "created_at": model_record.created_at.isoformat() if model_record.created_at else None,
+            "last_used_at": model_record.last_used_at.isoformat() if model_record.last_used_at else None
+        }
+        
+        logger.info(f"Retrieved metrics for model {model_id}", 
+                   mape=metrics["mape"], 
+                   accuracy=metrics["accuracy"])
+        
+        return metrics
+        
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error(f"Failed to get model metrics: {str(e)}")
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail="Failed to retrieve model metrics"
+        )
+
+@router.get("/tenants/{tenant_id}/models", response_model=List[TrainedModelResponse])
+async def list_models(
+    tenant_id: str = Path(..., description="Tenant ID"),
+    status: Optional[str] = Query(None, description="Filter by status (active/inactive)"),
+    model_type: Optional[str] = Query(None, description="Filter by model type"),
+    limit: int = Query(50, ge=1, le=100, description="Maximum number of models to return"),
+    db: AsyncSession = Depends(get_db)
+):
+    """
+    List models for a tenant - used by forecasting service for model discovery
+    """
+    try:
+        # Build query with filters
+        query_parts = ["SELECT * FROM trained_models WHERE tenant_id = :tenant_id"]
+        params = {"tenant_id": tenant_id}
+        
+        if status == "deployed" or status == "active":
+            query_parts.append("AND is_active = true AND is_production = true")
+        elif status == "inactive":
+            query_parts.append("AND (is_active = false OR is_production = false)")
+            
+        if model_type:
+            query_parts.append("AND model_type = :model_type")
+            params["model_type"] = model_type
+            
+        query_parts.append("ORDER BY created_at DESC LIMIT :limit")
+        params["limit"] = limit
+        
+        query = text(" ".join(query_parts))
+        result = await db.execute(query, params)
+        model_records = result.fetchall()
+        
+        models = []
+        for record in model_records:
+            models.append({
+                "model_id": record.id,
+                "tenant_id": record.tenant_id,
+                "product_name": record.product_name,
+                "model_type": record.model_type,
+                "model_path": record.model_path,
+                "version": 1,  # Default version
+                "training_samples": record.training_samples or 0,
+                "features": record.features_used or [],
+                "hyperparameters": record.hyperparameters or {},
+                "training_metrics": {
+                    "mape": record.mape or 0.0,
+                    "mae": record.mae or 0.0,
+                    "rmse": record.rmse or 0.0,
+                    "r2_score": record.r2_score or 0.0
+                },
+                "is_active": record.is_active,
+                "created_at": record.created_at,
+                "data_period_start": record.training_start_date,
+                "data_period_end": record.training_end_date
+            })
+        
+        logger.info(f"Retrieved {len(models)} models for tenant {tenant_id}")
+        return models
+        
+    except Exception as e:
+        logger.error(f"Failed to list models: {str(e)}")
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail="Failed to retrieve models"
         )

services/training/app/schemas/training.py

@@ -352,11 +352,28 @@ class TrainingErrorUpdate(BaseModel):
     job_id: str = Field(..., description="Training job identifier")
     error: str = Field(..., description="Error message")
     timestamp: datetime = Field(default_factory=datetime.now, description="Error timestamp")
-
+    
+    
+class ModelMetricsResponse(BaseModel):
+    """Response schema for model performance metrics"""
+    model_id: str = Field(..., description="Unique model identifier")
+    accuracy: float = Field(..., description="Model accuracy (R2 score)", ge=0.0, le=1.0)
+    mape: float = Field(..., description="Mean Absolute Percentage Error")
+    mae: float = Field(..., description="Mean Absolute Error")
+    rmse: float = Field(..., description="Root Mean Square Error")
+    r2_score: float = Field(..., description="R-squared score")
+    training_samples: int = Field(..., description="Number of training samples used")
+    features_used: List[str] = Field(..., description="List of features used in training")
+    model_type: str = Field(..., description="Type of ML model")
+    created_at: Optional[str] = Field(None, description="Model creation timestamp")
+    last_used_at: Optional[str] = Field(None, description="Last time model was used")
+    
+    class Config:
+        from_attributes = True
 
 # Union type for all WebSocket messages
 TrainingWebSocketMessage = Union[
     TrainingProgressUpdate,
     TrainingCompletedUpdate,
     TrainingErrorUpdate
-]
+]