import gradio
import json
import torch
from transformers import AutoTokenizer
from transformers import pipeline
from optimum.onnxruntime import ORTModelForSequenceClassification
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware

# CORS Config
app = FastAPI()

app.add_middleware(
    CORSMiddleware,
    allow_origins=["https://statosphere-3704059fdd7e.c5v4v4jx6pq5.win"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# "xenova/mobilebert-uncased-mnli" "typeform/mobilebert-uncased-mnli" Fast but small--same as bundled in Statosphere
# "xenova/deberta-v3-base-tasksource-nli" Not impressed
# "Xenova/bart-large-mnli" A bit slow
# "Xenova/distilbert-base-uncased-mnli" "typeform/distilbert-base-uncased-mnli" Bad answers
# "Xenova/deBERTa-v3-base-mnli" "MoritzLaurer/DeBERTa-v3-base-mnli" Still a bit slow and not great answers
model_name = "xenova/nli-deberta-v3-small"
file_name = "onnx/model_quantized.onnx"
tokenizer_name = "cross-encoder/nli-deberta-v3-small"
model = ORTModelForSequenceClassification.from_pretrained(model_name, file_name=file_name)
tokenizer = AutoTokenizer.from_pretrained(tokenizer_name, model_max_length=512)

# file = cached_download("https://huggingface.co/" + model_name + "")
# sess = InferenceSession(file)

classifier = pipeline(task="zero-shot-classification", model=model, tokenizer=tokenizer)

def zero_shot_classification(data_string, request: gradio.Request):
    if request:
        print("Request headers dictionary:", request.headers)
        if request.headers["origin"] not in ["https://statosphere-3704059fdd7e.c5v4v4jx6pq5.win", "https://jhuhman-statosphere-backend.hf.space"]:
            return "{}"
    print(data_string)
    data = json.loads(data_string)
    print(data)
    results = classifier(data['sequence'], candidate_labels=data['candidate_labels'], hypothesis_template=data['hypothesis_template'], multi_label=data['multi_label'])
    response_string = json.dumps(results)
    return response_string

gradio_interface = gradio.Interface(
    fn = zero_shot_classification,
    inputs = gradio.Textbox(label="JSON Input"),
    outputs = gradio.Textbox()
)
gradio_interface.launch()