import datetime
import time
import random
import os
import pandas as pd
from sms import prepare_sms

LOCK_PATH = "output\\alarms.lock"
ALARM_DB = "output\\alarms.feather"
WAIT_FOR_NEXT_MESSAGE = 60


def process_dataframe(df):

    now = datetime.datetime.now()
    records = df.to_dict("records")
    for alarm in records:
        if (~alarm["is_sent"]) & (alarm["time"] < now):
            try:
                prepare_sms(alarm["phone_number"], alarm["content"], True)
                # Update alarms status
                alarm["is_sent"] = True
                # print("SMS send to " + alarm["phone_number"])
                # sleep to avoid reaching
                time.sleep(random.randint(1, 8))
            except Exception as exp:
                print(
                    "Echec lors de l'envoie du SMS au " + alarm["phone_number"],
                    exp,
                )
    # Transform back the data into dataframe
    return pd.DataFrame.from_dict(records)


def main():
    if os.path.exists(LOCK_PATH):
        print("The program is already running")
    else:
        # Touch the Lock File
        with open(LOCK_PATH, "w") as f:
            f.write("")
        try:
            # Read data from database
            df = pd.read_feather(ALARM_DB)
            completion = df.is_sent.mean()
            print(f"Message send {completion*100:02.0f}%")
            try:
                while True:
                    df = process_dataframe(df)
                    df.to_feather(ALARM_DB)
                    now = datetime.datetime.now()
                    sms_sent = df.is_sent.mean()
                    if sms_sent > completion:
                        print(f"Message send {sms_sent*100:02.0f}%")
                    completion = sms_sent
                    if completion == 1:
                        break
                    delta = df[~df.is_sent].time.min() - now
                    time.sleep(delta.total_seconds() + 1)

            except KeyboardInterrupt:
                pass
            finally:
                df.to_feather(ALARM_DB)
        finally:
            print("The program is done")
            # Remove the lock file
            os.remove(LOCK_PATH)


if __name__ == "__main__":
    main()