# Native modules
import logging
import traceback
import os
import time
from datetime import datetime, timedelta, date

# Third-party modules
import requests
from dateutil.parser import parse
import pytz
from dotenv import load_dotenv
from urllib.parse import urlencode
from typing import List, Dict, Optional, Any, Tuple

# Import the SessionNotifier class
from session_notifier import SessionNotifier

# Import the preferred sessions from the session_config module
from session_config import PREFERRED_SESSIONS

# Import the AuthHandler class
from auth import AuthHandler

load_dotenv()

# Configuration
USERNAME = os.environ.get("CROSSFIT_USERNAME")
PASSWORD = os.environ.get("CROSSFIT_PASSWORD")

if not all([USERNAME, PASSWORD]):
    raise ValueError("Missing environment variables: CROSSFIT_USERNAME and/or CROSSFIT_PASSWORD")

APPLICATION_ID = "81560887"
CATEGORY_ID = "677"  # Activity category ID for CrossFit
TIMEZONE = "Europe/Paris"  # Adjust to your timezone
# Booking window configuration (can be overridden by environment variables)
# TARGET_RESERVATION_TIME: string "HH:MM" local time when bookings open (default 20:01)
# BOOKING_WINDOW_END_DELTA_MINUTES: int minutes after target time to stop booking (default 10)
TARGET_RESERVATION_TIME = os.environ.get("TARGET_RESERVATION_TIME", "20:01")
BOOKING_WINDOW_END_DELTA_MINUTES = int(os.environ.get("BOOKING_WINDOW_END_DELTA_MINUTES", "10"))
DEVICE_TYPE = "3"

# Retry configuration
RETRY_MAX = 3
RETRY_BACKOFF = 1
APP_VERSION = "5.09.21"

class Booker:
    """
    A class for handling the main booking logic.
    This class is designed to be used as a standalone component
    that can be initialized with authentication and session management
    and used to perform the booking process.
    """

    def __init__(self, auth_handler: AuthHandler, notifier: SessionNotifier) -> None:
        """
        Initialize the Booker with necessary attributes.

        Args:
            auth_handler (AuthHandler): AuthHandler instance for authentication.
            notifier (SessionNotifier): SessionNotifier instance for sending notifications.
        """
        self.auth_handler = auth_handler
        self.notifier = notifier

        # Initialize the session and headers
        self.session: requests.Session = requests.Session()
        self.base_headers: Dict[str, str] = {
            "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:140.0) Gecko/20100101 Firefox/140.0",
            "Content-Type": "application/x-www-form-urlencoded",
            "Nubapp-Origin": "user_apps",
        }
        self.session.headers.update(self.base_headers)

        # Define mandatory parameters for API calls
        self.mandatory_params: Dict[str, str] = {
            "app_version": APP_VERSION,
            "device_type": DEVICE_TYPE,
            "id_application": APPLICATION_ID,
            "id_category_activity": CATEGORY_ID
        }

    def get_auth_headers(self) -> Dict[str, str]:
        """
        Return headers with authorization from the AuthHandler.

        Returns:
            Dict[str, str]: Headers dictionary with authorization if available.
        """
        return self.auth_handler.get_auth_headers()

    async def booker(self, current_time: datetime) -> None:
        """
        Run one cycle of checking and booking sessions.

        Args:
            current_time (datetime): Current time for comparison.
        """
        # Calculate date range to check (current day, day + 1, and day + 2)
        start_date: date = current_time.date()
        end_date: date = start_date + timedelta(days=2)  # Only go up to day + 2

        # Get available sessions
        sessions_data: Optional[Dict[str, Any]] = self.get_available_sessions(start_date, end_date)
        if not sessions_data or not sessions_data.get("success", False):
            logging.error("No sessions available or error fetching sessions")
            return

        activities: List[Dict[str, Any]] = sessions_data.get("data", {}).get("activities_calendar", [])

        # Display all available sessions within the date range
        self.display_upcoming_sessions(activities, current_time)

        # Find sessions to book (preferred only) within allowed date range
        found_preferred_sessions: List[Dict[str, Any]] = []

        for session in activities:
            session_time: datetime = parse(session["start_timestamp"])
            if not session_time.tzinfo:
                session_time = pytz.timezone(TIMEZONE).localize(session_time)

            # Check if session is within allowed date range (current day, day + 1, or day + 2)
            days_diff = (session_time.date() - current_time.date()).days
            if not (0 <= days_diff <= 2):
                continue  # Skip sessions outside the allowed date range

            # Check if session is preferred and bookable
            if self.is_session_bookable(session, current_time):
                if self.matches_preferred_session(session, current_time):
                    found_preferred_sessions.append(session)

        # Display preferred sessions found
        if found_preferred_sessions:
            logging.info("Preferred sessions found:")
            for session in found_preferred_sessions:
                session_time: datetime = parse(session["start_timestamp"])
                if not session_time.tzinfo:
                    session_time = pytz.timezone(TIMEZONE).localize(session_time)
                logging.info(f"ID: {session['id_activity_calendar']}, Name: {session['name_activity']}, Time: {session_time.strftime('%Y-%m-%d %H:%M')}")
        else:
            logging.info("No matching preferred sessions found")

        # Book preferred sessions
        if not found_preferred_sessions:
            logging.info("No matching sessions found to book")
            return

        # Book sessions (preferred first)
        sessions_to_book = [("Preferred", session) for session in found_preferred_sessions]
        sessions_to_book.sort(key=lambda x: 0 if x[0] == "Preferred" else 1)
        booked_sessions = []

        for session_type, session in sessions_to_book:
            session_time: datetime = parse(session["start_timestamp"])
            logging.info(f"Attempting to book {session_type} session at {session_time} ({session['name_activity']})")
            if self.book_session(session["id_activity_calendar"]):
                # Display booked session
                booked_sessions.append(session)
                logging.info(f"Successfully booked {session_type} session at {session_time}")

                # Notify about booked session
                session_details = f"{session['name_activity']} at {session_time.strftime('%Y-%m-%d %H:%M')}"
                await self.notifier.notify_session_booking(session_details)
            else:
                logging.error(f"Failed to book {session_type} session at {session_time}")

                # Notify about failed booking
                session_details = f"{session['name_activity']} at {session_time.strftime('%Y-%m-%d %H:%M')}"
                await self.notifier.notify_impossible_booking(session_details)
                logging.info(f"Notified about impossible booking for {session_type} session at {session_time}")

        # Display all booked session(s)
        if booked_sessions:
            logging.info("Booked sessions:")
            for session in booked_sessions:
                session_time: datetime = parse(session["start_timestamp"])
                if not session_time.tzinfo:
                    session_time = pytz.timezone(TIMEZONE).localize(session_time)
                logging.info(f"ID: {session['id_activity_calendar']}, Name: {session['name_activity']}, Time: {session_time.strftime('%Y-%m-%d %H:%M')}")
        else:
            logging.info("No sessions were booked")

    async def run(self) -> None:
        """
        Main execution loop.
        """
        # Set up timezone
        tz: pytz.timezone = pytz.timezone(TIMEZONE)

        # Parse TARGET_RESERVATION_TIME to get the target hour and minute
        target_hour, target_minute = map(int, TARGET_RESERVATION_TIME.split(":"))
        target_time = datetime.now(tz).replace(hour=target_hour, minute=target_minute, second=0, microsecond=0)
        booking_window_end = target_time + timedelta(minutes=BOOKING_WINDOW_END_DELTA_MINUTES)

        # Initial login
        if not self.auth_handler.login():
            logging.error("Authentication failed - exiting program")
            return

        try:
            while True:
                try:
                    current_time: datetime = datetime.now(tz)
                    logging.info(f"Current time: {current_time}")

                    # Only book sessions if current time is within the booking window
                    if target_time <= current_time <= booking_window_end:
                        # Run booking cycle to check for preferred sessions and book
                        await self.booker(current_time)
                        # Wait for a short time before next check
                        time.sleep(60)
                    else:
                        # Check again in 5 minutes if outside booking window
                        time.sleep(300)
                except Exception as e:
                    logging.error(f"Unexpected error in booking cycle: {str(e)} - Traceback: {traceback.format_exc()}")
                    time.sleep(60)  # Wait before retrying after error
        except KeyboardInterrupt:
            self.quit()

    def quit(self) -> None:
        """
        Clean up resources and exit the script.
        """
        logging.info("Script interrupted by user. Quitting...")
        exit(0)

    def get_available_sessions(self, start_date: date, end_date: date) -> Optional[Dict[str, Any]]:
        """
        Fetch available sessions from the API.

        Args:
            start_date (date): Start date for fetching sessions.
            end_date (date): End date for fetching sessions.

        Returns:
            Optional[Dict[str, Any]]: Dictionary containing available sessions if successful, None otherwise.
        """
        from session_manager import SessionManager
        session_manager = SessionManager(self.auth_handler)
        return session_manager.get_available_sessions(start_date, end_date)

    def book_session(self, session_id: str) -> bool:
        """
        Book a specific session.

        Args:
            session_id (str): ID of the session to book.

        Returns:
            bool: True if booking is successful, False otherwise.
        """
        from session_manager import SessionManager
        session_manager = SessionManager(self.auth_handler)
        return session_manager.book_session(session_id)

    def get_booked_sessions(self) -> List[Dict[str, Any]]:
        """
        Get a list of booked sessions.

        Returns:
            A list of dictionaries containing information about the booked sessions.
        """
        from session_manager import SessionManager
        session_manager = SessionManager(self.auth_handler)
        return session_manager.get_booked_sessions()

    def is_session_bookable(self, session: Dict[str, Any], current_time: datetime) -> bool:
        """
        Check if a session is bookable based on user_info.

        Args:
            session (Dict[str, Any]): Session data.
            current_time (datetime): Current time for comparison.

        Returns:
            bool: True if the session is bookable, False otherwise.
        """
        from session_manager import SessionManager
        session_manager = SessionManager(self.auth_handler)
        return session_manager.is_session_bookable(session, current_time)

    def matches_preferred_session(self, session: Dict[str, Any], current_time: datetime) -> bool:
        """
        Check if session matches one of your preferred sessions with exact matching.

        Args:
            session (Dict[str, Any]): Session data.
            current_time (datetime): Current time for comparison.

        Returns:
            bool: True if the session matches a preferred session, False otherwise.
        """
        from session_manager import SessionManager
        session_manager = SessionManager(self.auth_handler)
        return session_manager.matches_preferred_session(session, current_time)

    def display_upcoming_sessions(self, sessions: List[Dict[str, Any]], current_time: datetime) -> None:
        """
        Display upcoming sessions with ID, name, date, and time.

        Args:
            sessions (List[Dict[str, Any]]): List of session data.
            current_time (datetime): Current time for comparison.
        """
        from session_manager import SessionManager
        session_manager = SessionManager(self.auth_handler)
        session_manager.display_upcoming_sessions(sessions, current_time)