from datetime import datetime

from pytask.taskapp.models import Profile

from pytask.taskapp.events.task import addCredits, addMentor

from pytask.taskapp.events.user import changeRole

from pytask.taskapp.utilities.notification import create_notification

def reply_to_request(request_obj, reply, replied_by):

    """

    makes a request replied with the given reply.

    arguments:

        request_obj - Request object for which change is intended

        reply - a boolean value to be given as reply (True/False)

        replied_by - the user object who replies to the request

    """

    if not request_obj.is_replied:

        request_obj.reply = reply

        request_obj.is_replied = True

        request_obj.reply_date = datetime.now()

        request_obj.replied_by = replied_by

        request_obj.save()

        if request_obj.role == "PY":

            ## note that we are not doing any check. we make requests invalid when an event like closing task happens.

            task = request_obj.task

            pynts = request_obj.pynts

            receiving_user = request_obj.receiving_user

            requested_by = request_obj.sent_by

            for a_mentor in task.mentors.all():

                if reply:

                    addCredits(task, request_obj.sent_by, request_obj.receiving_user, pynts)

                    create_notification(request_obj.role, a_mentor, replied_by, True, task, request_obj.remarks, requested_by, receiving_user, pynts)

                else:

                    create_notification(request_obj.role, a_mentor, replied_by, False, task, request_obj.remarks, requested_by, receiving_user, pynts)

        elif request_obj.role == "MT":

            task = request_obj.task

            requested_by = request_obj.sent_by

            if reply:

                ## tell the replied user that he is mentor for this task and give him learn more link

                create_notification("NT", request_obj.replied_by, task=task) 

                ## now check if there are such similar requests and mark them as invalid

                ## they cannot be of type PY and so we can use the replied_by to get requests

                pending_requests = replied_by.request_sent_to.filter(is_valid=True, is_replied=False, role="MT",task=task)

                for req in pending_requests:

                       create_notification("MT", req.sent_by, replied_by, False, task=req.task, remarks = "User has already accepted one such request and is a mentor.", requested_by = req.sent_by)

                       req.is_valid = False

                       req.save()

                ## alert all the mentors including who made request and all assigned users

                for a_mentor in task.mentors.all():

                    create_notification(request_obj.role, a_mentor, replied_by, True, task, request_obj.remarks, requested_by)

                for a_user in task.assigned_users.all():

                    create_notification(request_obj.role, a_user, replied_by, True, task, request_obj.remarks, requested_by)

                addMentor(task, request_obj.replied_by)

            else:

                ## tell the requested user that his request was rejected due to these reasons.

                create_notification(request_obj.role, requested_by, replied_by, False, task, request_obj.remarks, requested_by)

        elif request_obj.role == "DV":

            if reply:

                ## tell only the user who made him a DV

                ## drop a welcome message to that fucker

                changeRole(role=request_obj.role, user=request_obj.replied_by)

                create_notification(request_obj.role, request_obj.sent_by, request_obj.replied_by, reply, requested_by=request_obj.sent_by)

                ## here we look for requests that are similar => requesting for DV and make them invalid

                ## also we drop a notification to user who made request

                pending_requests = request_obj.replied_by.request_sent_to.filter(is_valid=True,is_replied=False,role="DV")

                for req in pending_requests:

                    req.is_valid = False

                    req.save()

                    create_notification(role = req.role, sent_to = req.sent_by, sent_from = replied_by, reply = False, \

                                        remarks = "User has accepted a similar request and has rights same or higher privileged than the request", \

                                        requested_by = req.sent_by )

            else:

                create_notification(request_obj.role, request_obj.sent_by, request_obj.replied_by, reply, remarks=request_obj.remarks, requested_by=request_obj.sent_by)

        elif request_obj.role == "MG":

            if reply:

                ## tell all the MG and AD

                ## drop a welcome message to that fucker

                changeRole(role=request_obj.role, user=request_obj.replied_by)

                alerting_users = Profile.objects.filter(user__is_active=True).exclude(rights="CT").exclude(rights="DV")

                for a_profile in alerting_users:

                    create_notification(request_obj.role, a_profile.user, request_obj.replied_by, reply, requested_by=request_obj.sent_by)

                ## here we look for requests that less or similar => requesting for DV or MG and make them invalid

                ## also we drop a notification to user who made request

                active_requests = request_obj.replied_by.request_sent_to.filter(is_valid=True,is_replied=False)

                pending_requests = active_requests.filter(role="DV") | active_requests.filter(role="MG")

                for req in pending_requests:

                    req.is_valid = False

                    req.save()

                    create_notification(role = req.role, sent_to = req.sent_by, sent_from = replied_by, reply = False, \

                                        remarks = "User has accepted a similar request and has rights same or higher privileged than the request", \

                                        requested_by = req.sent_by )

            else:

                create_notification(request_obj.role, request_obj.sent_by, request_obj.replied_by, reply, remarks=request_obj.remarks, requested_by=request_obj.sent_by)

        elif request_obj.role == "AD":

            if reply:

                ## tell all the AD

                ## drop a welcome message to that fucker

                changeRole(role=request_obj.role, user=request_obj.replied_by)

                alerting_users = Profile.objects.filter(user__is_active=True).filter(rights="AD")

                for a_profile in alerting_users:

                    create_notification(request_obj.role, a_profile.user, request_obj.replied_by, reply, requested_by=request_obj.sent_by)

            else:

                create_notification(request_obj.role, request_obj.sent_by, request_obj.replied_by, reply, remarks=request_obj.remarks, requested_by=request_obj.sent_by)

        return True #Reply has been added successfully

    return False #Already replied