from os import access

from aws_lambda_powertools import Logger
from aws_lambda_powertools.utilities.data_classes import (
    EventBridgeEvent,
    event_source,
)
from aws_lambda_powertools.utilities.typing import LambdaContext
from glom import glom
from layercake.dateutils import now, ttl
from layercake.dynamodb import DynamoDBPersistenceLayer, KeyPair, SortKey

from boto3clients import dynamodb_client
from config import (
    ENROLLMENT_TABLE,
)

logger = Logger(__name__)
dyn = DynamoDBPersistenceLayer(ENROLLMENT_TABLE, dynamodb_client)


@event_source(data_class=EventBridgeEvent)
@logger.inject_lambda_context
def lambda_handler(event: EventBridgeEvent, context: LambdaContext) -> bool:
    new_image = event.detail['new_image']
    now_ = now()
    enrollment_id = new_image['id']
    user = new_image['user']
    course_name = glom(new_image, 'course.name')
    access_period = int(
        dyn.collection.get_item(
            KeyPair(
                pk=enrollment_id,
                sk=SortKey('METADATA#COURSE', path_spec='access_period'),
            ),
        )
    )

    with dyn.transact_writer() as transact:
        transact.put(
            item={
                'id': enrollment_id,
                'sk': 'SCHEDULE#REMINDER_NO_ACCESS_AFTER_3_DAYS',
                'name': user['name'],
                'email': user['email'],
                'course': course_name,
                'created_at': now_,
                'ttl': ttl(days=3, start_dt=now_),
            },
        )

        # By default, the enrollment will expire when the access period ends
        # (scheduled below).

        # If the enrollment is completed earlier (e.g., certificate issued),
        # the expiration schedule is canceled and an archive schedule
        # (`SCHEDULE#SET_AS_ARCHIVED`) is created instead.
        transact.put(
            item={
                'id': enrollment_id,
                'sk': 'SCHEDULE#SET_AS_EXPIRED',
                'created_at': now_,
                'ttl': ttl(start_dt=now_, days=access_period),
            },
        )
        print(access_period)
        transact.put(
            item={
                'id': enrollment_id,
                'sk': 'SCHEDULE#REMINDER_ACCESS_PERIOD_BEFORE_30_DAYS',
                'name': user['name'],
                'email': user['email'],
                'course': course_name,
                'created_at': now_,
                'ttl': ttl(start_dt=now_, days=access_period - 30),
            },
        )

    return True