import streamlit as st
from datasets import load_dataset
import datetime as dt
import random
import json
import os
from huggingface_hub import HfApi, CommitScheduler
import uuid


HF_API_KEY = os.environ.get("HF_TOKEN", None)

api = HfApi(token=HF_API_KEY)

REPO_ID = "imomayiz/darija-english"
DATASET_REPO_URL = f"https://huggingface.co/datasets/{REPO_ID}"

submissions_folder = "submissions"
submissions_file = os.path.join(submissions_folder, f"submissions_{uuid.uuid4()}.json")
os.makedirs(submissions_folder, exist_ok=True)

scheduler = CommitScheduler(
    repo_id=REPO_ID,
    repo_type="dataset",
    folder_path=submissions_folder,
    path_in_repo="submissions",
    every=1,
    hf_api=api
)

def load_data(repo_id):
    dataset = load_dataset(f'{repo_id}', name='sentences', split='sentences')
    return dataset

def fetch_sentence(dataset, column_name="darija_ar"):
    
    # Get a random sentence
    random_sentence_index = random.randint(0, len(dataset) - 1)
    random_sentence = dataset[random_sentence_index][column_name]

    st.session_state.sentence = random_sentence
    st.session_state.translation_input = ""
    st.session_state.translation_input_fr = ""

    return random_sentence

def store_submission(api: HfApi, sentence: str, translation: str, translation_fr: str): 
    """
    Append input/outputs and user feedback to a JSON Lines file 
    using a thread lock to avoid concurrent writes from different users.
    """
    ts = dt.datetime.now().strftime("%Y-%m-%d_%H-%M-%S-%f")
    # folder_path = "submissions"
    # os.makedirs(folder_path, exist_ok=True)
    # filename = os.path.join(folder_path, f"submissions_{ts}.txt")

    # with open(filename, "w", encoding="utf-8") as f:
    #     f.write(f"darija,eng,darija_ar\n{sentence},{translation},{translation_fr}")
        
    # api.upload_file(
    #             path_or_fileobj=filename,
    #             path_in_repo=filename,
    #             repo_id=REPO_ID,
    #             repo_type="dataset",
    #         )

    with scheduler.lock:
        with submissions_file.open("a") as f:
            f.write(json.dumps({
                "darija": translation_fr, 
                "eng": translation, 
                "darija_ar": sentence}))
            f.write("\n")

    st.success(
        f"""Translation submitted successfully to 
        {DATASET_REPO_URL}/tree/main/{submissions_folder}"""
        )


# Load the dataset
dataset = load_data(REPO_ID)


if "sentence" not in st.session_state:
    st.session_state.sentence = fetch_sentence(dataset) 
if 'translation_input' not in st.session_state:
    st.session_state.translation_input = ""
if 'translation_input_fr' not in st.session_state:
    st.session_state.translation_input_fr = ""
if 'display_new' not in st.session_state:
    st.session_state.display_new = False

st.title("Translate From Arabic to English")

st.markdown(
"""This mini-app allows you to contribute to the **darija-english** dataset 
as part of [DODa](https://darija-open-dataset.github.io/)
project. To contribute, simply translate the given sentence from Arabic to English.
The translated sentence will be submitted to the dataset 
[here](https://huggingface.co/datasets/imomayiz/darija-english)."""
)

st.divider()

st.write(f"""
    <div style="
        padding: 5px;
        border: 1px solid #000000;
        border-radius: 5px;
    ">
        <p style="font-size: 20px;">{st.session_state.sentence}.</p>
    </div>""", unsafe_allow_html=True)
    

# Display new sentence button
st.session_state.display_new = st.button("New Sentence",
                                            on_click=fetch_sentence,
                                            args=(dataset,))


# Input field for translation
translation_input_placeholder = st.empty()

with translation_input_placeholder.container():
    translation_input = st.text_input("Enter translation to english: ",
                                        st.session_state.translation_input)
    st.session_state.translation_input = translation_input

# Input field for translation
translation_input_placeholder_fr = st.empty()

with translation_input_placeholder_fr.container():
    translation_input_fr = st.text_input(
        "Enter translation to darija in latin characters: ",
        st.session_state.translation_input_fr
        )
    st.session_state.translation_input_fr = translation_input_fr

if st.button("Submit Translation"):
    if not st.session_state.translation_input_fr or st.session_state.translation_input:
        st.warning("Please enter a translation before submitting.")
    else:
        store_submission(api,
                    st.session_state.sentence, 
                    st.session_state.translation_input,
                    st.session_state.translation_input_fr
                        )