"""FastAPI entry point for the Village Simulation backend."""

import uvicorn
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware

from backend.api.routes import router
from backend.core.engine import get_engine

# Create FastAPI app
app = FastAPI(
    title="Village Simulation API",
    description="API for the Village Economy Simulation",
    version="1.0.0",
    docs_url="/docs",
    redoc_url="/redoc",
)

# Add CORS middleware for frontend access
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],  # In production, specify actual origins
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# Include API routes
app.include_router(router, prefix="/api", tags=["simulation"])


@app.on_event("startup")
async def startup_event():
    """Initialize the simulation on startup."""
    engine = get_engine()
    engine.initialize(num_agents=8)
    print("Village Simulation initialized with 8 agents")


@app.get("/", tags=["root"])
def root():
    """Root endpoint with API information."""
    return {
        "name": "Village Simulation API",
        "version": "1.0.0",
        "docs": "/docs",
        "status": "running",
    }


@app.get("/health", tags=["health"])
def health_check():
    """Health check endpoint."""
    engine = get_engine()
    return {
        "status": "healthy",
        "simulation_running": engine.is_running,
        "agents_alive": len(engine.world.get_living_agents()),
    }


def main():
    """Run the server."""
    uvicorn.run(
        "backend.main:app",
        host="0.0.0.0",
        port=8000,
        reload=True,
    )


if __name__ == "__main__":
    main()