"""Main FastAPI app instance declaration."""

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.middleware.trustedhost import TrustedHostMiddleware

from app.api.api import api_router
from app.core import config

app = FastAPI(
    title=config.settings.PROJECT_NAME,
    version=config.settings.VERSION,
    description=config.settings.DESCRIPTION,
    openapi_url="/openapi.json",
    docs_url="/",
)
app.include_router(api_router)

# Sets all CORS enabled origins
app.add_middleware(
    CORSMiddleware,
    allow_origins=[str(origin) for origin in config.settings.BACKEND_CORS_ORIGINS],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# Guards against HTTP Host Header attacks
app.add_middleware(TrustedHostMiddleware, allowed_hosts=config.settings.ALLOWED_HOSTS)