import os
import time
from datetime import datetime, timedelta

import pandas as pd
import schedule
from datasets import DatasetDict, load_dataset, Dataset
from huggingface_hub import login

from utilities.data_collator import merge_and_filter_data
from utilities.my_logger import setup_logger
from utilities.readme_update import update_readme

# Set dataset name, path to README.md, and existing dataset details
subreddit = os.environ["SUBREDDIT"]
username = os.environ["USERNAME"]
dataset_name = f"{username}/dataset-creator-reddit-{subreddit}"
dataset_readme_path = "README.md"

# Authenticate with Hugging Face using an auth token
auth_token = os.environ["HUGGINGFACE_AUTH_TOKEN"]
login(auth_token, add_to_git_credential=True)

logger = setup_logger(__name__)


def get_dataset():
    # Load the existing dataset from the Hugging Face hub or create a new one
    try:
        dataset = load_dataset(dataset_name, download_mode="reuse_cache_if_exists", ignore_verifications=True)
        logger.debug("Loading existing dataset")
        if "__index_level_0__" in dataset["train"].column_names:
            dataset = dataset.remove_columns(["__index_level_0__"])
    except FileNotFoundError:
        logger.warning("Creating new dataset")
        dataset = DatasetDict()
    return dataset


def main():
    date = datetime.now().strftime('%Y-%m-%d')
    logger.warning(f"Running main function for date: {date}")
    dataset = get_dataset()

    # Get Latest Data and merge with historic data
    old_df = dataset['train'].to_pandas() if 'train' in dataset.keys() else pd.DataFrame()
    new_df = merge_and_filter_data(old_df=old_df)
    dataset['train'] = Dataset.from_pandas(new_df, preserve_index=False)

    # Update README
    new_rows = len(new_df) - len(old_df)
    update_readme(dataset_name=dataset_name, subreddit=subreddit, latest_date=date, new_rows=new_rows)
    logger.info(f"Adding {new_rows} rows for {date}.")

    # Push the augmented dataset to the Hugging Face hub
    logger.debug(f"Pushing data for {date} to the Hugging Face hub")
    dataset.push_to_hub(dataset_name, token=auth_token)
    logger.info(f"Processed and pushed data for {date} to the Hugging Face Hub")


def schedule_daily_task():
    """
    Schedule the daily_task to run at the specific time every day.
    """
    # start_time = (datetime.now() + timedelta(minutes=1)).time().strftime('%H:%M')  # Now + 30 seconds
    start_time = '05:00'
    logger.info(f'Scheduling tasks to run every day at: {start_time}')
    schedule.every().day.at(start_time).do(main)

    while True:
        schedule.run_pending()
        time.sleep(1)


if __name__ == "__main__":
    schedule_daily_task()