main.py

import os
from functools import lru_cache

import uvicorn
from dotenv import load_dotenv
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import RedirectResponse
from pymongo import MongoClient

from config import settings
from endpoints.contacts.routers import router as contactsRouter
from endpoints.experiences.routers import router as experiencesRouter
from endpoints.interests.routers import router as interestsRouter
from endpoints.projects.routers import router as projectsRouter
from endpoints.skills.routers import router as skillsRouter
from endpoints.user.routers import router as userRouter


@lru_cache  # caches the execution of settings for optimization
def getSettings():
    return settings


# naming settings for each class
db = getSettings().db
md = getSettings().md
mt = getSettings().mt
srv = getSettings().srv

# loading env variable that holds MongoDB connection
load_dotenv()
MONGODB_URI = os.environ[db.DB_URI]

# instantiation of FastAPI app w/ configuration
app = FastAPI(
    title=mt.APP_NAME,
    description=mt.DESC,
    version=mt.VERSION,
    contact=mt.CONTACT,
    license_info=mt.LICENSE
)

# cors middleware
app.add_middleware(
    CORSMiddleware,
    allow_origins=md.CORS_ORIGINS,
    allow_credentials=md.CORS_CRED,
    allow_methods=md.CORS_METHODS,
    allow_headers=md.CORS_HEADERS
)


@app.on_event("startup")
def startupDBClient():
    app.client = MongoClient(MONGODB_URI, db.PORT)
    app.db = app.client[db.DB_NAME]


@app.on_event("shutdown")
def shutdownDBClient():
    app.client.close()


# redirects root URL to docs
@app.get('/', include_in_schema=False)
def root():
    return RedirectResponse("/docs")


app.include_router(userRouter, tags=["user"])
app.include_router(contactsRouter, tags=["contacts"])
app.include_router(skillsRouter, tags=['skills'])
app.include_router(experiencesRouter, tags=['experiences'])
app.include_router(interestsRouter, tags=['interests'])
app.include_router(projectsRouter, tags=['projects'])

if __name__ == "__main__":
    uvicorn.run(
        "main:app",
        reload=mt.DEBUG_MODE,
        host=srv.HOST,
        port=srv.PORT,
        log_level=srv.LOG_LEVEL
    )