from fastapi import FastAPI, Depends, BackgroundTasks
import gc

from src.encoder import FashionCLIPEncoder
from src.models import TextRequest, ImageRequest, Response
from src.auth import verify_token
from src.utils import delete_images


encoder = FashionCLIPEncoder(normalize=True)
app = FastAPI()
app.state.req_count = 0
COLLECT_GC_EVERY = 20


def cleanup_after_request(images):
    if images is not None:
        success = delete_images(images)
        if not success:
            print("Failed to delete images")

    app.state.req_count += 1
    if app.state.req_count % COLLECT_GC_EVERY == 0:
        gc.collect()


@app.get("/")
async def root():
    return {
        "status": "ok",
    }


@app.post("/encode_texts")
async def encode_texts(
    request: TextRequest,
    token: str = Depends(verify_token),
) -> Response:
    embeddings = encoder.encode_text(request.texts)
    response = Response(embeddings=embeddings)

    return response


@app.post("/encode_images")
async def encode_images(
    request: ImageRequest,
    background_tasks: BackgroundTasks,
    token: str = Depends(verify_token),
) -> Response:
    images = request.download()
    embeddings = encoder.encode_images(images)

    background_tasks.add_task(cleanup_after_request, images)

    return Response(embeddings=embeddings)