import os

if __name__ == "__main__":
    # import needed here when running main.py to debug backend
    # you will need to run pip install python-dotenv
    from dotenv import load_dotenv  # type: ignore

    load_dotenv()
import pypandoc
import sentry_sdk
from fastapi import FastAPI, HTTPException, Request, status
from fastapi.exceptions import RequestValidationError
from fastapi.responses import JSONResponse
from logger import get_logger
from middlewares.cors import add_cors_middleware
from routes.misc_routes import misc_router
from routes.upload_routes import upload_router

logger = get_logger(__name__)

sentry_dsn = os.getenv("SENTRY_DSN")
if sentry_dsn:
    sentry_sdk.init(
        dsn=sentry_dsn,
        traces_sample_rate=1.0,
    )

app = FastAPI()


@app.on_event("startup")
async def startup_event():
    if not os.path.exists(pypandoc.get_pandoc_path()):
        pypandoc.download_pandoc()


add_cors_middleware(app)


app.include_router(upload_router)
app.include_router(misc_router)


@app.exception_handler(HTTPException)
async def http_exception_handler(_, exc):
    return JSONResponse(
        status_code=exc.status_code,
        content={"detail": exc.detail},
    )


# log more details about validation errors (422)
def handle_request_validation_error(app: FastAPI):
    @app.exception_handler(RequestValidationError)
    async def validation_exception_handler(
        request: Request, exc: RequestValidationError
    ):
        exc_str = f"{exc}".replace("\n", " ").replace("   ", " ")
        logger.error(request, exc_str)
        content = {
            "status_code": status.HTTP_422_UNPROCESSABLE_ENTITY,
            "message": exc_str,
            "data": None,
        }
        return JSONResponse(
            content=content, status_code=status.HTTP_422_UNPROCESSABLE_ENTITY
        )


handle_request_validation_error(app)

if __name__ == "__main__":
    # run main.py to debug backend
    import uvicorn

    uvicorn.run(app, host="0.0.0.0", port=5050)