"""Cal.com scheduling integration."""

import os
from typing import Any, Dict, List, Optional, Union

try:
    import requests
    HAS_REQUESTS = True
except ImportError:
    HAS_REQUESTS = False

from .base import CalendarProvider


class CalComProvider(CalendarProvider):
    """Cal.com scheduling integration."""
    
    def __init__(
        self,
        api_key: Optional[str] = None,
        api_url: str = "https://api.cal.com/v1",
        user_id: Optional[str] = None,
        credentials_path: Optional[str] = None,
    ):
        """Initialize the Cal.com provider.
        
        Args:
            api_key: Cal.com API key
            api_url: Cal.com API base URL (default: https://api.cal.com/v1)
            user_id: Cal.com user ID
            credentials_path: Optional path to a JSON file containing credentials
        """
        if not HAS_REQUESTS:
            raise ImportError(
                "Requests library not installed. "
                "Install with 'pip install requests'"
            )
        
        # Read credentials from environment variables if not provided
        self.api_key = api_key or os.environ.get("CAL_COM_API_KEY")
        self.user_id = user_id or os.environ.get("CAL_COM_USER_ID")
        self.api_url = api_url
        
        if credentials_path:
            # TODO: Implement loading credentials from file
            pass
            
        if not self.api_key:
            raise ValueError(
                "Missing required API key for Cal.com. "
                "Provide api_key or set CAL_COM_API_KEY environment variable."
            )
            
        # Setup headers for API requests
        self.headers = {
            "Authorization": f"Bearer {self.api_key}",
            "Content-Type": "application/json",
        }
        
    def create_event(
        self, 
        summary: str, 
        start_time: str, 
        end_time: str, 
        timezone: str = "UTC",
        location: Optional[str] = None,
        description: Optional[str] = None,
        attendees: Optional[List[str]] = None,
        **kwargs
    ) -> Dict[str, Any]:
        """Create a calendar event using Cal.com.
        
        Args:
            summary: Event title/summary
            start_time: Start time in ISO format
            end_time: End time in ISO format
            timezone: Timezone for the event
            location: Optional location for the event
            description: Optional description for the event
            attendees: Optional list of email addresses for attendees
            **kwargs: Additional parameters
            
        Returns:
            Dict containing the created event details
        """
        raise NotImplementedError("Cal.com integration is not fully implemented yet")
    
    def list_events(
        self, 
        time_min: Optional[str] = None, 
        time_max: Optional[str] = None, 
        max_results: int = 10, 
        **kwargs
    ) -> List[Dict[str, Any]]:
        """List Cal.com events in a specified time range.
        
        Args:
            time_min: Start time for listing events (ISO format)
            time_max: End time for listing events (ISO format)
            max_results: Maximum number of events to return
            **kwargs: Additional parameters
            
        Returns:
            List of events matching the criteria
        """
        raise NotImplementedError("Cal.com integration is not fully implemented yet")
    
    def get_event(self, event_id: str, **kwargs) -> Dict[str, Any]:
        """Get a specific Cal.com event by ID.
        
        Args:
            event_id: ID of the event to retrieve
            **kwargs: Additional parameters
            
        Returns:
            Dict containing the event details
        """
        raise NotImplementedError("Cal.com integration is not fully implemented yet")
    
    def update_event(
        self, 
        event_id: str, 
        summary: Optional[str] = None,
        start_time: Optional[str] = None,
        end_time: Optional[str] = None,
        timezone: Optional[str] = None,
        location: Optional[str] = None,
        description: Optional[str] = None,
        attendees: Optional[List[str]] = None,
        **kwargs
    ) -> Dict[str, Any]:
        """Update an existing Cal.com event.
        
        Args:
            event_id: ID of the event to update
            summary: Optional new title
            start_time: Optional new start time
            end_time: Optional new end time
            timezone: Optional new timezone
            location: Optional new location
            description: Optional new description
            attendees: Optional new list of attendees
            **kwargs: Additional parameters
            
        Returns:
            Dict containing the updated event details
        """
        raise NotImplementedError("Cal.com integration is not fully implemented yet")
    
    def delete_event(self, event_id: str, **kwargs) -> bool:
        """Delete a Cal.com event.
        
        Args:
            event_id: ID of the event to delete
            **kwargs: Additional parameters
            
        Returns:
            True if deletion was successful
        """
        raise NotImplementedError("Cal.com integration is not fully implemented yet")
    
    def get_free_busy(
        self, 
        time_min: str, 
        time_max: str,
        **kwargs
    ) -> Dict[str, Any]:
        """Get free/busy information from Cal.com.
        
        Args:
            time_min: Start time for checking free/busy (ISO format)
            time_max: End time for checking free/busy (ISO format)
            **kwargs: Additional parameters
            
        Returns:
            Dict containing busy periods
        """
        raise NotImplementedError("Cal.com integration is not fully implemented yet") 