import traceback
from typing import Dict, Any

from config import NOTIFICATION_BATCH_SIZE, USE_WHITELIST
from parsing import parse_notification
from db_utils import get_config, set_config, is_whitelisted, is_player_banned
from response import generate_response
from custom_types import BotResponse
from fediverse_factory import get_fediverse_service
from fediverse_types import FediverseNotification, NotificationType, Visibility


def process_fediverse_notification(notification: FediverseNotification, fediverse_service=None) -> None:
    '''Processes an individual fediverse notification using the abstraction'''
    if fediverse_service is None:
        fediverse_service = get_fediverse_service()
    
    # Get user and instance info
    username = notification.user.username
    host = notification.user.host
    instance = host if host else 'local'

    # Check whitelist
    if USE_WHITELIST and not is_whitelisted(instance):
        print(f'⚠️ Blocked notification from untrusted instance: {instance}')
        return

    # Only process mentions and replies
    if notification.type not in (NotificationType.MENTION, NotificationType.REPLY):
        return

    # Return early if no post attached
    if not notification.post:
        return

    # Determine visibility for reply
    if notification.post.visibility != Visibility.SPECIFIED:
        visibility = Visibility.HOME
    else:
        visibility = Visibility.SPECIFIED

    notif_type = notification.type.value
    notif_id = notification.id
    print(f'📨 <{notif_id}> [{notif_type}] from @{username}@{instance}')

    # 🧠 Send to the parser
    parsed_notification = parse_notification(notification, fediverse_service)

    if not parsed_notification:
        return

    author = parsed_notification['author']
    if is_player_banned(author):
        print(f'⚠️ Blocked notification from banned player: {author}')
        return

    # Get the response
    response: BotResponse | None = generate_response(parsed_notification)

    if not response:
        return

    # Handle attachment URLs (convert to file IDs if needed)
    file_ids = response['attachment_urls'] if response['attachment_urls'] else None

    # Send response using fediverse service
    fediverse_service.create_post(
        text=response['message'],
        reply_to_id=notification.post.id,
        visibility=visibility,
        file_ids=file_ids
        # visible_user_ids=[]  # TODO: write actual visible users ids so pleromers can use the bot privately
    )


def process_notifications(client: misskey.Misskey) -> bool:
    '''Processes a batch of unread notifications. Returns False if there are
    no more notifications to process.'''

    last_seen_id = get_config('last_seen_notif_id')
    # process_notification writes to last_seen_id, so make a copy
    new_last_seen_id = last_seen_id

    try:
        notifications = client.i_notifications(
                # Fetch notifications we haven't seen yet. This option is a bit
                # tempermental, sometimes it'll include since_id, sometimes it
                # won't. We need to keep track of what notifications we've
                # already processed.
                since_id=last_seen_id,
                # Let misskey handle the filtering
                include_types=['mention', 'reply'],
                # And handle the batch size while we're at it
                limit=NOTIFICATION_BATCH_SIZE
        )

        # No notifications. Wait the poll period.
        if not notifications:
            return False

        # Iterate oldest to newest
        for notification in notifications:
            try:
                # Skip if we've processed already
                notif_id = notification.get('id', '')
                if notif_id <= last_seen_id:
                    continue

                # Update new_last_seen_id and process
                new_last_seen_id = notif_id
                process_notification(client, notification)

            except Exception as e:
                print(f'An exception has occured while processing a \
notification: {e}')
                print(traceback.format_exc())

        # If we got as many notifications as we requested, there are probably
        # more in the queue
        return len(notifications) == NOTIFICATION_BATCH_SIZE

    except MisskeyAPIException as e:
        print(f'An exception has occured while reading notifications: {e}\n')
        print(traceback.format_exc())
    finally:
        # Quality jank right here, but finally lets us update the last_seen_id
        # even if we hit an exception or return early
        if new_last_seen_id > last_seen_id:
            set_config('last_seen_notif_id', new_last_seen_id)

    return False