import requests
import jwt
import time
from datetime import timezone
from .utils import get_zoom_config


def generate_zoom_jwt():
    """Generate JWT token using dynamic Zoom configuration"""
    config = get_zoom_config()
    payload = {
        'iss': config['ZOOM_ACCOUNT_ID'],
        'exp': time.time() + 3600
    }
    token = jwt.encode(payload, config['ZOOM_CLIENT_SECRET'], algorithm='HS256')
    return token


def create_zoom_meeting(topic, start_time, duration, host_email):
    """Create a Zoom meeting using dynamic configuration"""
    jwt_token = generate_zoom_jwt()
    headers = {
        'Authorization': f'Bearer {jwt_token}',
        'Content-Type': 'application/json'
    }

    # Format start_time according to Zoom API requirements
    # Convert datetime to ISO 8601 format with Z suffix for UTC
    if hasattr(start_time, 'isoformat'):
        # If it's a datetime object, format it properly
        if hasattr(start_time, 'tzinfo') and start_time.tzinfo is not None:
            # Timezone-aware datetime: convert to UTC and format with Z suffix
            utc_time = start_time.astimezone(timezone.utc)
            zoom_start_time = utc_time.strftime("%Y-%m-%dT%H:%M:%S") + "Z"
        else:
            # Naive datetime: assume it's in UTC and format with Z suffix
            zoom_start_time = start_time.strftime("%Y-%m-%dT%H:%M:%S") + "Z"
    else:
        # If it's already a string, use as-is (assuming it's properly formatted)
        zoom_start_time = str(start_time)

    data = {
        "topic": topic,
        "type": 2,
        "start_time": zoom_start_time,
        "duration": duration,
        "schedule_for": host_email,
        "settings": {"join_before_host": True},
        "timezone": "UTC"  # Explicitly set timezone to UTC
    }
    url = f"https://api.zoom.us/v2/users/{host_email}/meetings"
    return requests.post(url, json=data, headers=headers)


def update_zoom_meeting(meeting_id, updated_data):
    """Update an existing Zoom meeting"""
    jwt_token = generate_zoom_jwt()
    headers = {
        'Authorization': f'Bearer {jwt_token}',
        'Content-Type': 'application/json'
    }
    url = f"https://api.zoom.us/v2/meetings/{meeting_id}"
    return requests.patch(url, json=updated_data, headers=headers)


def delete_zoom_meeting(meeting_id):
    """Delete a Zoom meeting"""
    jwt_token = generate_zoom_jwt()
    headers = {
        'Authorization': f'Bearer {jwt_token}',
        'Content-Type': 'application/json'
    }
    url = f"https://api.zoom.us/v2/meetings/{meeting_id}"
    return requests.delete(url, headers=headers)


def get_zoom_meeting_details(meeting_id):
    """Get details of a Zoom meeting"""
    jwt_token = generate_zoom_jwt()
    headers = {
        'Authorization': f'Bearer {jwt_token}',
        'Content-Type': 'application/json'
    }
    url = f"https://api.zoom.us/v2/meetings/{meeting_id}"
    return requests.get(url, headers=headers)