import os import secrets import traceback from concurrent.futures import ThreadPoolExecutor from datetime import datetime, timedelta from enum import Enum from pathlib import Path from typing import Any, Dict, List, Optional from uuid import UUID, uuid4 import uvicorn from dotenv import load_dotenv from fastapi import ( BackgroundTasks, Depends, FastAPI, Header, HTTPException, Query, Request, status, ) from fastapi.middleware.cors import CORSMiddleware from loguru import logger from pydantic import BaseModel, Field from swarms import Agent # Load environment variables load_dotenv() class AgentStatus(str, Enum): """Enum for agent status.""" IDLE = "idle" PROCESSING = "processing" ERROR = "error" MAINTENANCE = "maintenance" # Security configurations API_KEY_LENGTH = 32 # Length of generated API keys class APIKey(BaseModel): key: str name: str created_at: datetime last_used: datetime is_active: bool = True class APIKeyCreate(BaseModel): name: str # A friendly name for the API key class User(BaseModel): id: UUID username: str is_active: bool = True is_admin: bool = False api_keys: Dict[str, APIKey] = {} # key -> APIKey object class AgentConfig(BaseModel): """Configuration model for creating a new agent.""" agent_name: str = Field(..., description="Name of the agent") model_name: str = Field( ..., description="Name of the llm you want to use provided by litellm", ) description: str = Field( default="", description="Description of the agent's purpose" ) system_prompt: str = Field( ..., description="System prompt for the agent" ) model_name: str = Field( default="gpt-4", description="Model name to use" ) temperature: float = Field( default=0.1, ge=0.0, le=2.0, description="Temperature for the model", ) max_loops: int = Field( default=1, ge=1, description="Maximum number of loops" ) autosave: bool = Field( default=True, description="Enable autosave" ) dashboard: bool = Field( default=False, description="Enable dashboard" ) verbose: bool = Field( default=True, description="Enable verbose output" ) dynamic_temperature_enabled: bool = Field( default=True, description="Enable dynamic temperature" ) user_name: str = Field( default="default_user", description="Username for the agent" ) retry_attempts: int = Field( default=1, ge=1, description="Number of retry attempts" ) context_length: int = Field( default=200000, ge=1000, description="Context length" ) output_type: str = Field( default="string", description="Output type (string or json)" ) streaming_on: bool = Field( default=False, description="Enable streaming" ) tags: List[str] = Field( default_factory=list, description="Tags for categorizing the agent", ) class AgentUpdate(BaseModel): """Model for updating agent configuration.""" description: Optional[str] = None system_prompt: Optional[str] = None temperature: Optional[float] = None max_loops: Optional[int] = None tags: Optional[List[str]] = None status: Optional[AgentStatus] = None class AgentSummary(BaseModel): """Summary model for agent listing.""" agent_id: UUID agent_name: str description: str created_at: datetime last_used: datetime total_completions: int tags: List[str] status: AgentStatus class AgentMetrics(BaseModel): """Model for agent performance metrics.""" total_completions: int average_response_time: float error_rate: float last_24h_completions: int total_tokens_used: int uptime_percentage: float success_rate: float peak_tokens_per_minute: int class CompletionRequest(BaseModel): """Model for completion requests.""" prompt: str = Field(..., description="The prompt to process") agent_id: UUID = Field(..., description="ID of the agent to use") max_tokens: Optional[int] = Field( None, description="Maximum tokens to generate" ) temperature_override: Optional[float] = None stream: bool = Field( default=False, description="Enable streaming response" ) class CompletionResponse(BaseModel): """Model for completion responses.""" agent_id: UUID response: str metadata: Dict[str, Any] timestamp: datetime processing_time: float token_usage: Dict[str, int] class AgentStore: """Enhanced store for managing agents.""" def __init__(self): self.agents: Dict[UUID, Agent] = {} self.agent_metadata: Dict[UUID, Dict[str, Any]] = {} self.users: Dict[UUID, User] = {} # user_id -> User self.api_keys: Dict[str, UUID] = {} # api_key -> user_id self.user_agents: Dict[UUID, List[UUID]] = {} # user_id -> [agent_ids] self.executor = ThreadPoolExecutor(max_workers=4) self._ensure_directories() def _ensure_directories(self): """Ensure required directories exist.""" Path("logs").mkdir(exist_ok=True) Path("states").mkdir(exist_ok=True) def create_api_key(self, user_id: UUID, key_name: str) -> APIKey: """Create a new API key for a user.""" if user_id not in self.users: raise HTTPException( status_code=status.HTTP_404_NOT_FOUND, detail="User not found" ) # Generate a secure random API key api_key = secrets.token_urlsafe(API_KEY_LENGTH) # Create the API key object key_object = APIKey( key=api_key, name=key_name, created_at=datetime.utcnow(), last_used=datetime.utcnow() ) # Store the API key self.users[user_id].api_keys[api_key] = key_object self.api_keys[api_key] = user_id return key_object async def verify_agent_access(self, agent_id: UUID, user_id: UUID) -> bool: """Verify if a user has access to an agent.""" if agent_id not in self.agents: return False return ( self.agent_metadata[agent_id]["owner_id"] == user_id or self.users[user_id].is_admin ) def validate_api_key(self, api_key: str) -> Optional[UUID]: """Validate an API key and return the associated user ID.""" user_id = self.api_keys.get(api_key) if not user_id or api_key not in self.users[user_id].api_keys: return None key_object = self.users[user_id].api_keys[api_key] if not key_object.is_active: return None # Update last used timestamp key_object.last_used = datetime.utcnow() return user_id async def create_agent(self, config: AgentConfig, user_id: UUID) -> UUID: """Create a new agent with the given configuration.""" try: agent = Agent( agent_name=config.agent_name, system_prompt=config.system_prompt, model_name=config.model_name, max_loops=config.max_loops, autosave=config.autosave, dashboard=config.dashboard, verbose=config.verbose, dynamic_temperature_enabled=config.dynamic_temperature_enabled, saved_state_path=f"states/{config.agent_name}_{datetime.now().strftime('%Y%m%d_%H%M%S')}.json", user_name=config.user_name, retry_attempts=config.retry_attempts, context_length=config.context_length, return_step_meta=True, output_type="str", streaming_on=config.streaming_on, ) agent_id = uuid4() self.agents[agent_id] = agent self.agent_metadata[agent_id] = { "description": config.description, "created_at": datetime.utcnow(), "last_used": datetime.utcnow(), "total_completions": 0, "tags": config.tags, "total_tokens": 0, "error_count": 0, "response_times": [], "status": AgentStatus.IDLE, "start_time": datetime.utcnow(), "downtime": timedelta(), "successful_completions": 0, } # Add to user's agents list if user_id not in self.user_agents: self.user_agents[user_id] = [] self.user_agents[user_id].append(agent_id) return agent_id except Exception as e: logger.error(f"Error creating agent: {str(e)}") raise HTTPException( status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail=f"Failed to create agent: {str(e)}", ) async def get_agent(self, agent_id: UUID) -> Agent: """Retrieve an agent by ID.""" agent = self.agents.get(agent_id) if not agent: logger.error(f"Agent not found: {agent_id}") raise HTTPException( status_code=status.HTTP_404_NOT_FOUND, detail=f"Agent {agent_id} not found", ) return agent async def update_agent( self, agent_id: UUID, update: AgentUpdate ) -> None: """Update agent configuration.""" agent = await self.get_agent(agent_id) metadata = self.agent_metadata[agent_id] if update.system_prompt: agent.system_prompt = update.system_prompt if update.temperature is not None: agent.llm.temperature = update.temperature if update.max_loops is not None: agent.max_loops = update.max_loops if update.tags is not None: metadata["tags"] = update.tags if update.description is not None: metadata["description"] = update.description if update.status is not None: metadata["status"] = update.status if update.status == AgentStatus.MAINTENANCE: metadata["downtime"] += ( datetime.utcnow() - metadata["last_used"] ) logger.info(f"Updated agent {agent_id}") async def list_agents( self, tags: Optional[List[str]] = None, status: Optional[AgentStatus] = None, ) -> List[AgentSummary]: """List all agents, optionally filtered by tags and status.""" summaries = [] for agent_id, agent in self.agents.items(): metadata = self.agent_metadata[agent_id] # Apply filters if tags and not any( tag in metadata["tags"] for tag in tags ): continue if status and metadata["status"] != status: continue summaries.append( AgentSummary( agent_id=agent_id, agent_name=agent.agent_name, description=metadata["description"], created_at=metadata["created_at"], last_used=metadata["last_used"], total_completions=metadata["total_completions"], tags=metadata["tags"], status=metadata["status"], ) ) return summaries async def get_agent_metrics(self, agent_id: UUID) -> AgentMetrics: """Get performance metrics for an agent.""" metadata = self.agent_metadata[agent_id] response_times = metadata["response_times"] # Calculate metrics total_time = datetime.utcnow() - metadata["start_time"] uptime = total_time - metadata["downtime"] uptime_percentage = ( uptime.total_seconds() / total_time.total_seconds() ) * 100 success_rate = ( metadata["successful_completions"] / metadata["total_completions"] * 100 if metadata["total_completions"] > 0 else 0 ) return AgentMetrics( total_completions=metadata["total_completions"], average_response_time=( sum(response_times) / len(response_times) if response_times else 0 ), error_rate=( metadata["error_count"] / metadata["total_completions"] if metadata["total_completions"] > 0 else 0 ), last_24h_completions=sum( 1 for t in response_times if (datetime.utcnow() - t).days < 1 ), total_tokens_used=metadata["total_tokens"], uptime_percentage=uptime_percentage, success_rate=success_rate, peak_tokens_per_minute=max( metadata.get("tokens_per_minute", [0]) ), ) async def clone_agent( self, agent_id: UUID, new_name: str ) -> UUID: """Clone an existing agent with a new name.""" original_agent = await self.get_agent(agent_id) original_metadata = self.agent_metadata[agent_id] config = AgentConfig( agent_name=new_name, description=f"Clone of {original_agent.agent_name}", system_prompt=original_agent.system_prompt, model_name=original_agent.llm.model_name, temperature=original_agent.llm.temperature, max_loops=original_agent.max_loops, tags=original_metadata["tags"], ) return await self.create_agent(config) async def delete_agent(self, agent_id: UUID) -> None: """Delete an agent.""" if agent_id not in self.agents: raise HTTPException( status_code=status.HTTP_404_NOT_FOUND, detail=f"Agent {agent_id} not found", ) # Clean up any resources agent = self.agents[agent_id] if agent.autosave and os.path.exists(agent.saved_state_path): os.remove(agent.saved_state_path) del self.agents[agent_id] del self.agent_metadata[agent_id] logger.info(f"Deleted agent {agent_id}") async def process_completion( self, agent: Agent, prompt: str, agent_id: UUID, max_tokens: Optional[int] = None, temperature_override: Optional[float] = None, ) -> CompletionResponse: """Process a completion request using the specified agent.""" start_time = datetime.utcnow() metadata = self.agent_metadata[agent_id] try: # Update agent status metadata["status"] = AgentStatus.PROCESSING metadata["last_used"] = start_time # Apply temporary overrides if specified original_temp = agent.llm.temperature if temperature_override is not None: agent.llm.temperature = temperature_override # Process the completion response = agent.run(prompt) # Reset overrides if temperature_override is not None: agent.llm.temperature = original_temp # Update metrics processing_time = ( datetime.utcnow() - start_time ).total_seconds() metadata["response_times"].append(processing_time) metadata["total_completions"] += 1 metadata["successful_completions"] += 1 # Estimate token usage (this is a rough estimate) prompt_tokens = len(prompt.split()) * 1.3 completion_tokens = len(response.split()) * 1.3 total_tokens = int(prompt_tokens + completion_tokens) metadata["total_tokens"] += total_tokens # Update tokens per minute tracking current_minute = datetime.utcnow().replace( second=0, microsecond=0 ) if "tokens_per_minute" not in metadata: metadata["tokens_per_minute"] = {} metadata["tokens_per_minute"][current_minute] = ( metadata["tokens_per_minute"].get(current_minute, 0) + total_tokens ) return CompletionResponse( agent_id=agent_id, response=response, metadata={ "agent_name": agent.agent_name, "model_name": agent.llm.model_name, "temperature": agent.llm.temperature, }, timestamp=datetime.utcnow(), processing_time=processing_time, token_usage={ "prompt_tokens": int(prompt_tokens), "completion_tokens": int(completion_tokens), "total_tokens": total_tokens, }, ) except Exception as e: metadata["error_count"] += 1 metadata["status"] = AgentStatus.ERROR logger.error( f"Error in completion processing: {str(e)}\n{traceback.format_exc()}" ) raise HTTPException( status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail=f"Error processing completion: {str(e)}", ) finally: metadata["status"] = AgentStatus.IDLE class StoreManager: _instance = None @classmethod def get_instance(cls) -> 'AgentStore': if cls._instance is None: cls._instance = AgentStore() return cls._instance # Modify the dependency function def get_store() -> AgentStore: """Dependency to get the AgentStore instance.""" return StoreManager.get_instance() # Security utility function using the new dependency async def get_current_user( api_key: str = Header(..., description="API key for authentication"), store: AgentStore = Depends(get_store) ) -> User: """Validate API key and return current user.""" user_id = store.validate_api_key(api_key) if not user_id: raise HTTPException( status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid or expired API key", headers={"WWW-Authenticate": "ApiKey"}, ) return store.users[user_id] class SwarmsAPI: """Enhanced API class for Swarms agent integration.""" def __init__(self): self.app = FastAPI( title="Swarms Agent API", description="Production-grade API for Swarms agent interaction", version="1.0.0", docs_url="/v1/docs", redoc_url="/v1/redoc", ) # Initialize the store using the singleton manager self.store = StoreManager.get_instance() # Configure CORS self.app.add_middleware( CORSMiddleware, allow_origins=[ "*" ], # Configure appropriately for production allow_credentials=True, allow_methods=["*"], allow_headers=["*"], ) self._setup_routes() def _setup_routes(self): """Set up API routes.""" # In your API code @self.app.post("/v1/users", response_model=Dict[str, Any]) async def create_user(request: Request): """Create a new user and initial API key.""" try: body = await request.json() username = body.get("username") if not username or len(username) < 3: raise HTTPException(status_code=400, detail="Invalid username") user_id = uuid4() user = User(id=user_id, username=username) self.store.users[user_id] = user initial_key = self.store.create_api_key(user_id, "Initial Key") return {"user_id": user_id, "api_key": initial_key.key} except Exception as e: logger.error(f"Error creating user: {str(e)}") raise HTTPException(status_code=400, detail=str(e)) @self.app.post("/v1/users/{user_id}/api-keys", response_model=APIKey) async def create_api_key( user_id: UUID, key_create: APIKeyCreate, current_user: User = Depends(get_current_user) ): """Create a new API key for a user.""" if current_user.id != user_id and not current_user.is_admin: raise HTTPException( status_code=status.HTTP_403_FORBIDDEN, detail="Not authorized to create API keys for this user" ) return self.store.create_api_key(user_id, key_create.name) @self.app.get("/v1/users/{user_id}/api-keys", response_model=List[APIKey]) async def list_api_keys( user_id: UUID, current_user: User = Depends(get_current_user) ): """List all API keys for a user.""" if current_user.id != user_id and not current_user.is_admin: raise HTTPException( status_code=status.HTTP_403_FORBIDDEN, detail="Not authorized to view API keys for this user" ) return list(self.store.users[user_id].api_keys.values()) @self.app.delete("/v1/users/{user_id}/api-keys/{key}") async def revoke_api_key( user_id: UUID, key: str, current_user: User = Depends(get_current_user) ): """Revoke an API key.""" if current_user.id != user_id and not current_user.is_admin: raise HTTPException( status_code=status.HTTP_403_FORBIDDEN, detail="Not authorized to revoke API keys for this user" ) if key in self.store.users[user_id].api_keys: self.store.users[user_id].api_keys[key].is_active = False del self.store.api_keys[key] return {"status": "API key revoked"} raise HTTPException( status_code=status.HTTP_404_NOT_FOUND, detail="API key not found" ) @self.app.get("/v1/users/me/agents", response_model=List[AgentSummary]) async def list_user_agents( current_user: User = Depends(get_current_user), tags: Optional[List[str]] = Query(None), status: Optional[AgentStatus] = None, ): """List all agents owned by the current user.""" user_agents = self.store.user_agents.get(current_user.id, []) return [ agent for agent in await self.store.list_agents(tags, status) if agent.agent_id in user_agents ] # Modify existing routes to use API key authentication @self.app.post("/v1/agent", response_model=Dict[str, UUID]) async def create_agent( config: AgentConfig, current_user: User = Depends(get_current_user) ): """Create a new agent with the specified configuration.""" agent_id = await self.store.create_agent(config, current_user.id) return {"agent_id": agent_id} @self.app.get("/v1/agents", response_model=List[AgentSummary]) async def list_agents( tags: Optional[List[str]] = Query(None), status: Optional[AgentStatus] = None, ): """List all agents, optionally filtered by tags and status.""" return await self.store.list_agents(tags, status) @self.app.patch( "/v1/agent/{agent_id}", response_model=Dict[str, str] ) async def update_agent(agent_id: UUID, update: AgentUpdate): """Update an existing agent's configuration.""" await self.store.update_agent(agent_id, update) return {"status": "updated"} @self.app.get( "/v1/agent/{agent_id}/metrics", response_model=AgentMetrics, ) async def get_agent_metrics(agent_id: UUID): """Get performance metrics for a specific agent.""" return await self.store.get_agent_metrics(agent_id) @self.app.post( "/v1/agent/{agent_id}/clone", response_model=Dict[str, UUID], ) async def clone_agent(agent_id: UUID, new_name: str): """Clone an existing agent with a new name.""" new_id = await self.store.clone_agent(agent_id, new_name) return {"agent_id": new_id} @self.app.delete("/v1/agent/{agent_id}") async def delete_agent(agent_id: UUID): """Delete an agent.""" await self.store.delete_agent(agent_id) return {"status": "deleted"} @self.app.post( "/v1/agent/completions", response_model=CompletionResponse ) async def create_completion( request: CompletionRequest, background_tasks: BackgroundTasks, ): """Process a completion request with the specified agent.""" try: agent = await self.store.get_agent(request.agent_id) # Process completion response = await self.store.process_completion( agent, request.prompt, request.agent_id, request.max_tokens, request.temperature_override, ) # Schedule background cleanup background_tasks.add_task( self._cleanup_old_metrics, request.agent_id ) return response except Exception as e: logger.error(f"Error processing completion: {str(e)}") raise HTTPException( status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail=f"Error processing completion: {str(e)}", ) @self.app.get("/v1/agent/{agent_id}/status") async def get_agent_status(agent_id: UUID): """Get the current status of an agent.""" metadata = self.store.agent_metadata.get(agent_id) if not metadata: raise HTTPException( status_code=status.HTTP_404_NOT_FOUND, detail=f"Agent {agent_id} not found", ) return { "agent_id": agent_id, "status": metadata["status"], "last_used": metadata["last_used"], "total_completions": metadata["total_completions"], "error_count": metadata["error_count"], } async def _cleanup_old_metrics(self, agent_id: UUID): """Clean up old metrics data to prevent memory bloat.""" metadata = self.store.agent_metadata.get(agent_id) if metadata: # Keep only last 24 hours of response times cutoff = datetime.utcnow() - timedelta(days=1) metadata["response_times"] = [ t for t in metadata["response_times"] if isinstance(t, (int, float)) and t > cutoff.timestamp() ] # Clean up old tokens per minute data if "tokens_per_minute" in metadata: metadata["tokens_per_minute"] = { k: v for k, v in metadata["tokens_per_minute"].items() if k > cutoff } def create_app() -> FastAPI: """Create and configure the FastAPI application.""" logger.info("Creating FastAPI application") api = SwarmsAPI() app = api.app logger.info("FastAPI application created successfully") return app app = create_app() if __name__ == '__main__': try: logger.info("Starting API server...") print("Starting API server on http://0.0.0.0:8000") uvicorn.run( app, # Pass the app instance directly host="0.0.0.0", port=8000, log_level="info" ) except Exception as e: logger.error(f"Failed to start API: {str(e)}") print(f"Error starting server: {str(e)}")