import os

from django.http import HttpResponse, Http404

from django.shortcuts import redirect, render_to_response

from django.contrib.auth.models import User

from django.contrib.auth.decorators import login_required

from pytask.taskapp.models import Task, Profile, Request

from pytask.taskapp.events.user import createUser, updateProfile

from pytask.taskapp.events.request import reply_to_request

from pytask.taskapp.forms.user import UserProfileEditForm

from pytask.taskapp.utilities.request import get_request

from pytask.taskapp.utilities.notification import get_notification

def show_msg(user, message, redirect_url=None, url_desc=None):

    """ simply redirect to homepage """

    return render_to_response('show_msg.html',{'user':user, 'message':message, 'redirect_url':redirect_url, 'url_desc':url_desc})

def homepage(request):

    """ check for authentication and display accordingly. """

    user = request.user

    is_guest = False

    is_mentor = False

    can_create_task = False

    task_list = []

    if not user.is_authenticated():

        is_guest = True

        disp_num = 10

        tasks_count = Task.objects.count()

        if tasks_count <= disp_num:

            task_list = Task.objects.order_by('id').reverse()

        else:

            task_list = Task.objects.order_by('id').reverse()[:10]

        return render_to_response('index.html', {'is_guest':is_guest, 'task_list':task_list})

    else:

        user_profile = user.get_profile()

        is_mentor = True if user.task_mentors.all() else False

        can_create_task = False if user_profile.rights == u"CT" else True

        notifications = user.notification_sent_to.filter(is_deleted=False,is_read=False)

        requests = user.request_sent_to.filter(is_replied=False)

        context = {'user':user,

                   'is_guest':is_guest,

                   'is_mentor':is_mentor,

                   'task_list':task_list,

                   'can_create_task':can_create_task,

                   'notifications':notifications,

                   'requests':requests,

                   }

        return render_to_response('index.html', context)

@login_required

def view_my_profile(request,uid=None):

    """ allows the user to view the profiles of users """

    if uid == None:

        edit_profile = True

        profile = Profile.objects.get(user = request.user)

        return render_to_response('user/my_profile.html', {'edit_profile':edit_profile,'profile':profile, 'user':request.user})

    edit_profile = True if request.user == User.objects.get(pk=uid) else False

    try:

        profile = Profile.objects.get(user = User.objects.get(pk=uid))

    except Profile.DoesNotExist:

        raise Http404

    return render_to_response('user/my_profile.html', {'edit_profile':edit_profile,'profile':profile, 'user':request.user})

@login_required

def edit_my_profile(request):

    """ enables the user to edit his/her user profile """

    if request.method == 'POST':

        form = UserProfileEditForm(request.POST)

#        if not form.is_valid():

#            edit_profile_form = UserProfileEditForm(instance = form)

#            return render_to_response('user/edit_profile.html',{'edit_profile_form' : edit_profile_form})

        if request.user.is_authenticated() == True:

            profile = Profile.objects.get(user = request.user)

            data = request.POST#form.cleaned_data

            properties = {'aboutme':data['aboutme'],

                          'foss_comm':data['foss_comm'],

                          'phonenum':data['phonenum'],

                          'homepage':data['homepage'],

                          'street':data['street'],

                          'city':data['city'],

                          'country':data['country'],

                          'nick':data['nick']}

            uploaded_photo = request.FILES.get('photo',None)

            prev_photo = profile.photo

            if uploaded_photo:

                if prev_photo:

                    os.remove(prev_photo.path)

                properties['photo'] = uploaded_photo

            #fields = ['dob','gender','credits','aboutme','foss_comm','phonenum','homepage','street','city','country','nick']

            updateProfile(profile,properties)

            return redirect('/user/view/uid='+str(profile.user_id))

    else:

        profile = Profile.objects.get(user = request.user)

        edit_profile_form = UserProfileEditForm(instance = profile)

        return render_to_response('user/edit_profile.html',{'edit_profile_form' : edit_profile_form, 'user':request.user})

@login_required

def browse_requests(request):

    user = request.user

    active_reqs = user.request_sent_to.filter(is_replied=False).exclude(is_valid=False)

    reqs = active_reqs.order_by('creation_date').reverse()

    context = {

        'user':user,

        'reqs':reqs,

    }

    return render_to_response('user/browse_requests.html', context)

@login_required

def view_request(request, rid):

    """ please note that request variable in this method is that of django.

    our app request is called user_request.

    """

    user = request.user

    user_request = get_request(rid, user)

    if not user_request:

        raise Http404

    user_request.is_read = True

    user_request.save()

    context = {

        'user':user,

        'req':user_request,

        'sent_users':user_request.sent_to.all()

    }

    return render_to_response('user/view_request.html', context)

@login_required

def process_request(request, rid, reply):

    """ check if the method is post and then update the request.

    if it is get, display a 404 error.

    """

    user = request.user

    browse_request_url= '/user/requests'

    req_obj = get_request(rid, user)

    if not req_obj:

        return show_msg(user, "Your reply has been processed", browse_request_url, "view other requests")

    if request.method=="POST":

        reply = True if reply == "yes" else False

        req_obj.remarks = request.POST.get('remarks', "")

        req_obj.save()

        reply_to_request(req_obj, reply, user)

        return show_msg(user, "Your reply has been processed", browse_request_url, "view other requests")

    else:

        return show_msg(user, "You are not authorised to do this", browse_request_url, "view other requests")

@login_required

def browse_notifications(request):

    """ get the list of notifications that are not deleted and display in datetime order.

    """

    user = request.user

    active_notifications = user.notification_sent_to.filter(is_deleted=False).order_by('sent_date').reverse()

    context = {

        'user':user,

        'notifications':active_notifications,

    }

    return render_to_response('user/browse_notifications.html', context)

@login_required

def view_notification(request, nid):

    """ get the notification depending on nid.

    Display it.

    """

    user = request.user

    notification = get_notification(nid, user)

    if not notification:

        raise Http404

    notification.is_read = True

    notification.save()

    context = {

        'user':user,

        'notification':notification,

    }

    return render_to_response('user/view_notification.html', context)

@login_required

def edit_notification(request, nid, action):

    """ if action is delete, set is_deleted.

    if it is unread, unset is_read.

    save the notification and redirect to browse_notifications.

    """

    user = request.user

    notification = get_notification(nid, user)

    if not notification:

        raise Http404

    notifications_url = "/user/notifications/"

    if request.method == "POST":

        if action == "delete":

            notification.is_deleted = True

        elif action == "unread":

            notification.is_read = False

        notification.save()

        return redirect(notifications_url)

    else:

        return show_msg(user, 'This is wrong', notification_url, "view the notification")