from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from slowapi import _rate_limit_exceeded_handler
from slowapi.errors import RateLimitExceeded
from slowapi.middleware import SlowAPIMiddleware

from app.api.v1.router import api_router
from app.core.config import get_settings
from app.core.logging_config import configure_logging
from app.core.middleware import SecurityHeadersMiddleware
from app.core.rate_limit import limiter

settings = get_settings()
configure_logging("backend")

docs_enabled = settings.enable_docs and settings.environment != "production"

app = FastAPI(
    title=settings.app_name,
    version="0.2.0",
    docs_url="/docs" if docs_enabled else None,
    redoc_url="/redoc" if docs_enabled else None,
    openapi_url="/openapi.json" if docs_enabled else None,
)

app.state.limiter = limiter
app.add_exception_handler(RateLimitExceeded, _rate_limit_exceeded_handler)
app.add_middleware(SlowAPIMiddleware)
app.add_middleware(SecurityHeadersMiddleware)
app.add_middleware(
    CORSMiddleware,
    allow_origins=settings.cors_origins,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

app.include_router(api_router, prefix=settings.api_v1_prefix)


@app.get("/health")
def health():
    return {"status": "ok", "app": settings.app_name}