import os
import openai
from googleapiclient.discovery import build
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request
import pickle
import dateparser

# Load OpenAI API key
openai.api_key = os.getenv('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')  # Replace with your actual API key for testing if needed

SCOPES = ['https://www.googleapis.com/auth/calendar']

def authenticate_google_calendar():
    """Authenticate and return the Google Calendar API service."""
    creds = None
    if os.path.exists('token.pickle'):
        with open('token.pickle', 'rb') as token:
            creds = pickle.load(token)
    if not creds or not creds.valid:
        if creds and creds.expired and creds.refresh_token:
            creds.refresh(Request())
        else:
            flow = InstalledAppFlow.from_client_secrets_file(
                'credentials.json', SCOPES
            )
            creds = flow.run_local_server(port=0)
        with open('token.pickle', 'wb') as token:
            pickle.dump(creds, token)
    return build('calendar', 'v3', credentials=creds)

def parse_schedule_input(user_input):
    """Parse natural language input for scheduling details."""
    prompt = f"Extract an event title, date, and time from this input: '{user_input}'. Return in JSON format as {{'title': '...', 'date': 'YYYY-MM-DD', 'time': 'HH:MM'}}."
    response = openai.Completion.create(
        engine="text-davinci-003",
        prompt=prompt,
        max_tokens=100,
        temperature=0.3,
    )
    try:
        details = eval(response['choices'][0]['text'].strip())  # Parse string to dictionary
        return details
    except Exception as e:
        raise ValueError("Error parsing schedule input: " + str(e))

def add_event_to_calendar(service, event_details):
    """Add a parsed event to the Google Calendar."""
    try:
        event = {
            'summary': event_details['title'],
            'start': {
                'dateTime': f"{event_details['date']}T{event_details['time']}:00",
                'timeZone': 'UTC',  # Adjust to user-specific timezone if needed
            },
            'end': {
                'dateTime': f"{event_details['date']}T{event_details['time']}:00",
                'timeZone': 'UTC',
            },
        }
        created_event = service.events().insert(calendarId='primary', body=event).execute()
        return f"Event created: {created_event.get('htmlLink')}"
    except Exception as e:
        return f"Failed to add event: {str(e)}"

def schedule_bot_response(user_input):
    """Main function to process user input and schedule a task."""
    try:
        service = authenticate_google_calendar()
        event_details = parse_schedule_input(user_input)
        confirmation = add_event_to_calendar(service, event_details)
        return confirmation
    except Exception as e:
        return f"An error occurred: {str(e)}"