"""FastAPI application entry point."""
from contextlib import asynccontextmanager
from pathlib import Path

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.staticfiles import StaticFiles

from app.core.config import settings
from app.db.database import engine, Base
from app.routers.auth import router as auth_router  # noqa: F401
from app.routes.posts import router as posts_router
from app.routes.users import router as users_router
from app.routes.comments import router as comments_router
from app.routes.feed import router as feed_router


@asynccontextmanager
async def lifespan(app: FastAPI):
    """Application lifespan manager for startup/shutdown events."""
    # Startup: Create database tables
    Base.metadata.create_all(bind=engine)
    yield
    # Shutdown: cleanup if needed


# Create FastAPI app
app = FastAPI(
    title=settings.APP_NAME,
    version=settings.APP_VERSION,
    debug=settings.DEBUG,
    lifespan=lifespan,
)

# CORS middleware
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# Include routers
app.include_router(auth_router)
app.include_router(posts_router)
app.include_router(users_router)
app.include_router(comments_router)
app.include_router(feed_router)

# Mount static files for uploads
UPLOAD_DIR = Path(__file__).parent.parent / "uploads"
UPLOAD_DIR.mkdir(parents=True, exist_ok=True)
app.mount("/uploads", StaticFiles(directory=str(UPLOAD_DIR)), name="uploads")


@app.get("/")
async def root():
    """Root endpoint."""
    return {"message": f"Welcome to {settings.APP_NAME}", "version": settings.APP_VERSION}


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