import openpyxl
from gauth.models import Location, LocationManager
from django.http import Http404
from django.shortcuts import render, redirect
from django.views.generic import View
from django.contrib import messages
from user.forms import StaffRegistrationForm, StaffSheetDateForm
from review.models import Review
from facebook_app.models import FacebookReview
from yelp.models import YelpReview
from name_extractor.models import Staff
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
from django.shortcuts import get_object_or_404

from name_extractor.utils import extract_names_from_reviews, make_all_staffs_point_zero

from django.contrib.auth.mixins import LoginRequiredMixin, PermissionRequiredMixin
from user.utils import (
    get_google_review_report,
    get_facebook_report,
    date_str2datetime
)
from .forms import ImportStaffSpreadSheet


LOC_SYN = {
    'cypress-1960': 'cypress',
    'collegestation': 'college station'
}


class LocationListView(View, PermissionRequiredMixin):
    permission_required = 'is_staff'

    def post(self, request, *args, **kwargs):
        form = ImportStaffSpreadSheet(request.POST, request.FILES)
        if form.is_valid():
            staff_file = form.cleaned_data.get('staff_file')
            wb = openpyxl.load_workbook(staff_file)
            worksheet = wb.worksheets[0]

            rows = worksheet.values
            col_names = next(rows)

            try:
                name_idx, loc_idx, dept_idx = col_names.index('Name'), col_names.index('Location'), col_names.index('Job Title')
            except ValueError:
                messages.warning(request, "Columns in missing. Check columns ['Name', 'Location', 'Job Title'] again.")
                return redirect('location-list')

            # Clear all previously registered staffs
            staffs = Staff.objects.all()
            staffs.delete()
            for row in rows:
                try:
                    name, loc, dept = row[name_idx], row[loc_idx], row[dept_idx]
                except IndexError:
                    pass
                if loc.lower() in ['alllocations', '#n/a']:
                    continue
                if loc.lower() in LOC_SYN.keys():
                    loc = LOC_SYN[loc.lower()]

                location = Location.objects.filter(care_name__icontains=loc).first()
                if location:
                    Staff.objects.create(
                        name=name,
                        location=location,
                        department=dept
                    )
            messages.success(request, 'Staff file upload successfully.')
        return redirect('location-list')

    def get(self, request, *args, **kwargs):
        locations = Location.objects.all()
        form = ImportStaffSpreadSheet()
        context = {
            'all_locations': locations,
            'file_upload_form': form
        }
        return render(request, 'locations.html', context=context)


class LocationAnalytics(LoginRequiredMixin, View):
    def get(self, request, location_id, *args, **kwargs):
        location = Location.objects.get(pk=location_id)
        google_report = get_google_review_report(location_id)
        facebook_report = get_facebook_report(location_id)
        context = {
            'location': location,
            'google_this_month': google_report.get('this_month'),
            'google_last_month': google_report.get('last_month'),
            'facebook_this_month': facebook_report.get('this_month'),
            'facebook_last_month': facebook_report.get('last_month'),
        }
        return render(request, 'manager-dashboard.html', context=context)


class ReviewListLocationWise(View):
    def get(self, request, platform, location_id,  *args, **kwargs):
        location = Location.objects.get(pk=location_id)
        if platform == 'google':
            reviews = Review.objects.filter(location_id=location_id).order_by('-update_time')
        elif platform == 'facebook':
            reviews = FacebookReview.objects.filter(page__location_id=location_id).order_by('-create_time')
        elif platform == 'yelp':
            reviews = YelpReview.objects.filter(location__location_id=location_id).order_by('-date_posted')
        else:
            raise Http404()

        page = request.GET.get('page', 1)
        paginator = Paginator(reviews, 50)
        try:
            reviews = paginator.page(page)
        except PageNotAnInteger:
            reviews = paginator.page(1)
        except EmptyPage:
            reviews = paginator.page(paginator.num_pages)
        context = {'reviews': reviews, 'platform': platform, 'location': location}
        return render(request, 'review-list-man.html', context=context)


class ReviewAnalyticsGraph(View):

    def get(self, request, location_id, *args, **kwargs):
        location = Location.objects.get(pk=location_id)
        return render(request, 'location-wise-reviews-man.html', context={'location': location})


class StaffLeaderBoard(View):

    def get(self, request, location_id, *args, **kwargs):
        location = Location.objects.get(pk=location_id)
        staffs = Staff.objects.filter(location=location).order_by('-total_units')
        form = StaffRegistrationForm()
        date_form = StaffSheetDateForm()

        context = {
            'location': location,
            'staffs': staffs,
            'date_form': date_form,
            'form': form
        }
        return render(request, 'staff_list_man.html', context)

    def post(self, request, location_id, *args, **kwargs):
        form = StaffRegistrationForm(request.POST)
        if form.is_valid():
            name = form.cleaned_data.get('name')
            department = form.cleaned_data.get('department')
            nick_names = form.cleaned_data.get('nick_names')
            staff = Staff.objects.create(
                name=name,
                location_id=location_id,
                department=department,
                nick_names=nick_names
            )
            messages.success(request, f'A new staff {staff} has been created!')
        return redirect('staff-leaderboard-man', location_id=location_id)


class SyncStaffLeaderBoard(View):

    def post(self, request, location_id, *args, **kwargs):
        start_date = date_str2datetime(request.POST.get('start_date'))
        end_date = date_str2datetime(request.POST.get('end_date'))

        extract_names_from_reviews(
            start_date=start_date,
            end_date=end_date,
            location_id=location_id
        )
        return redirect('staff-leaderboard-man', location_id=location_id)


class StaffDelete(View):

    def get(self, request, staff_id, *args, **kwargs):
        staff = get_object_or_404(Staff, id=staff_id)
        staff.delete()
        return redirect('staff-leaderboard-man', location_id=staff.location_id)