"""
FastAPI main application for queueing network simulation.
"""
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware

app = FastAPI(
    title="Queueing Network Simulation API",
    description="Distributed database simulation using queueing theory with analytical validation",
    version="1.0.0"
)

# Configure CORS
app.add_middleware(
    CORSMiddleware,
    allow_origins=["http://localhost:5173", "http://localhost:3000"],  # React dev servers
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)


@app.get("/")
async def root():
    """Root endpoint - API health check."""
    return {
        "message": "Queueing Network Simulation API",
        "status": "running",
        "version": "1.0.0"
    }


@app.get("/health")
async def health_check():
    """Health check endpoint."""
    return {"status": "healthy"}


if __name__ == "__main__":
    import uvicorn
    uvicorn.run(app, host="0.0.0.0", port=8000, reload=True)