"""
AgentSociety Marketing Platform - FastAPI Backend
"""
import os
import logging
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from contextlib import asynccontextmanager
from sqlalchemy import text

# Configure logging
logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s [%(levelname)s] %(name)s: %(message)s"
)
logger = logging.getLogger(__name__)


@asynccontextmanager
async def lifespan(app: FastAPI):
    """Application lifespan events"""
    from app.config import get_settings
    settings = get_settings()
    
    # Startup
    logger.info("Starting AgentSociety API...")
    
    # Create upload directory
    os.makedirs(settings.upload_dir, exist_ok=True)
    
    # Start results listener (receives simulation results from Ray worker)
    from app.results_listener import start_results_listener
    start_results_listener(redis_url=settings.redis_url)
    logger.info("Results listener started - listening for Ray worker results")
    
    yield
    
    # Shutdown
    from app.results_listener import stop_results_listener
    stop_results_listener()
    logger.info("Shutting down AgentSociety API...")


# Create FastAPI app - disable redirect_slashes to prevent 307 that strips auth headers
app = FastAPI(
    title="AgentSociety Marketing Platform",
    description="AI-powered marketing simulation platform that simulates 1,000+ AI agents reacting to video advertisements",
    version="1.0.0",
    lifespan=lifespan,
    redirect_slashes=False
)

# CORS configuration - explicit origins required when credentials=True
origins = [
    "http://localhost:3000",
    "http://127.0.0.1:3000",
    "http://localhost:8000",
    "http://127.0.0.1:8000",
]

app.add_middleware(
    CORSMiddleware,
    allow_origins=origins,
    allow_credentials=True,
    allow_methods=["GET", "POST", "PUT", "DELETE", "OPTIONS", "PATCH"],
    allow_headers=["*"],
    expose_headers=["*"],
)

# Register routers
from app.routers import auth_router, projects_router, simulations_router
app.include_router(auth_router)
app.include_router(projects_router)
app.include_router(simulations_router)


@app.get("/")
async def root():
    """Health check endpoint"""
    return {
        "status": "healthy",
        "service": "AgentSociety API",
        "version": "1.0.0"
    }


@app.get("/health")
async def health_check():
    """Detailed health check"""
    from app.config import get_settings
    settings = get_settings()
    
    health = {
        "api": "healthy",
        "database": "unknown",
        "redis": "unknown"
    }
    
    # Check database
    try:
        from app.database import engine
        with engine.connect() as conn:
            conn.execute(text("SELECT 1"))
            health["database"] = "healthy"
    except Exception as e:
        health["database"] = f"unhealthy: {str(e)}"
    
    # Check Redis
    try:
        import redis
        import ssl as ssl_module
        redis_kwargs = {}
        if settings.redis_url.startswith("rediss://"):
            redis_kwargs["ssl_cert_reqs"] = ssl_module.CERT_REQUIRED
        r = redis.from_url(settings.redis_url, **redis_kwargs)
        r.ping()
        health["redis"] = "healthy"
    except Exception as e:
        health["redis"] = f"unhealthy: {str(e)}"
    
    return health