"""Mobile API endpoint handlers for vAIn mobile device interactions."""

from typing import Dict, Any, Optional

from fastapi import APIRouter, HTTPException
from pydantic import BaseModel
from slowapi import Limiter
from slowapi.util import get_remote_address

from mobile_vain.mobile_node import MobileNode  # Updated to snake_case

router = APIRouter()
limiter = Limiter(key_func=get_remote_address)

class MobileModelUpdate(BaseModel):
    """Data model for mobile device model updates."""
    device_id: str
    model_updates: Dict[str, Any]
    device_metrics: Dict[str, float]

class MobileResponse(BaseModel):
    """Standard response model for mobile API endpoints."""
    success: bool
    message: str
    data: Optional[Dict[str, Any]] = None

@router.post("/mobile/register")
@limiter.limit("5/minute")
async def register_mobile_device(device_id: str):
    """Register a new mobile device with the system.
    
    Args:
        device_id: Unique identifier for the mobile device
    """
    try:
        node = mobile_node.MobileNode(device_id)
        # Todo: Implement device registration logic using node
        return MobileResponse(
            success=True,
            message=f"Device {device_id} registered successfully"
        )
    except Exception as e:
        raise HTTPException(status_code=400, detail=str(e)) from e

@router.post("/mobile/update")
@limiter.limit("10/minute")
async def receive_mobile_update(update: MobileModelUpdate):
    """Process model updates from mobile devices.
    
    Args:
        update: Mobile model update data
    """
    try:
        # Todo: Implement update processing logic using update object
        return MobileResponse(
            success=True,
            message="Update received successfully",
            data={"update_id": "some_id"}
        )
    except Exception as e:
        raise HTTPException(status_code=400, detail=str(e)) from e

@router.get("/mobile/global-model/{device_id}")
@limiter.limit("30/minute")
async def get_global_model_for_mobile(device_id: str):
    """Retrieve the global model for a specific mobile device.
    
    Args:
        device_id: Unique identifier for the mobile device
    """
    try:
        if not device_id:
            raise HTTPException(status_code=400, detail="Device ID is required")

        node = MobileNode(device_id)
        global_model = node.get_global_model()

        if not global_model:
            raise HTTPException(status_code=404, detail="Global model not found")

        # Construct the model URL using the device ID and model version
        model_version = global_model.get('version', 'latest')
        model_url = f"https://vain-models.storage.com/{device_id}/global_model_{model_version}"

        return MobileResponse(
            success=True,
            message="Global model ready",
            data={
                "model_url": model_url,
                "version": model_version,
                "last_updated": global_model.get('last_updated'),
                "model_size": global_model.get('size'),
                "format": global_model.get('format', 'pytorch')
            }
        )
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e)) from e
