from django.shortcuts import render
from django.http import HttpResponseRedirect

from .models import YearData
from .models import MonthData
from .models import CalendarData
from .models import Event


def day_page(request, year: int, month: int, day: int):
    params = None

    select_suggested = False
    select_only_for_gm = False

    if not params:
        try:
            year_data = YearData.objects.get(number=year)
        except YearData.DoesNotExist:
            params = {'type': 'error', 'error_type': 'year'}

    if not params:
        try:
            year_id = getattr(year_data, 'id')
        except AttributeError:
            params = {'type': 'error', 'error_type': 'year'}

    if not params:
        try:
            month_data = MonthData.objects.get(number=month)
        except MonthData.DoesNotExist:
            params = {'type': 'error', 'error_type': 'month'}

    if not params:
        try:
            month_id = getattr(month_data, 'id')
        except AttributeError:
            params = {'type': 'error', 'error_type': 'month'}

    if not params:
        try:
            is_leap = getattr(year_data, 'is_leap')
        except AttributeError:
            params = {'type': 'error', 'error_type': 'year'}
        else:
            try:
                is_leap_month = getattr(month_data, 'is_leap_month')
            except AttributeError:
                params = {'type': 'error', 'error_type': 'month'}
            else:
                if not is_leap and is_leap_month:
                    params = {'type': 'error', 'error_type': 'month'}

    if not params:
        try:
            events = []
            es = Event.objects.filter(year=year_id, month=month_id, day=day,
                                      is_suggested=select_suggested, is_only_for_gm=select_only_for_gm
                                      ).order_by('time')
            for e in es:
                event = {}
                for param in ('time', 'title', 'is_suggested', 'is_only_for_gm'):
                    event[param] = getattr(e, param)

                event['descriptions'] = tuple(p for p in getattr(e, 'description').split('\n') if p)

                events.append(event)
        except (Event.DoesNotExist, AttributeError):
            params = {'type': 'error', 'error_type': 'events'}

    if not params:
        try:
            is_oneday = getattr(month_data, 'is_oneday')
        except AttributeError:
            params = {'type': 'error', 'error_type': 'month'}
        else:
            if is_oneday and day != 1 or not 1 <= day <= 30:
                params = {'type': 'error', 'error_type': 'day'}

    if not params:
        try:
            previous_day = {'year': year, 'month': month, 'day': day-1}

            if previous_day['day'] <= 0:
                previous_day['month'] -= 1

                if previous_day['month'] <= 0:
                    try:
                        previous_day['year'] = getattr(getattr(year_data, 'previous_year'), 'number')
                    except (AttributeError, YearData.DoesNotExist):
                        previous_day['year'] = None

                    if not previous_day['year']:
                        previous_day = None
                    else:
                        previous_month = MonthData.objects.last()
                        previous_day['month'] = getattr(previous_month, 'number')
                        previous_day['day'] = 1 if getattr(previous_month, 'is_oneday') else 30
                else:
                    previous_month = MonthData.objects.get(number=previous_day['month'])
                    previous_day['day'] = 1 if getattr(previous_month, 'is_oneday') else 30

            next_day = {'year': year, 'month': month, 'day': day + 1}

            if next_day['day'] > (1 if is_oneday else 30):
                next_day['day'] = 1
                next_day['month'] += 1

                try:
                    is_month_exist = MonthData.objects.get(number=next_day['month'])
                except MonthData.DoesNotExist:
                    is_month_exist = False
                if not is_month_exist:
                    next_day['month'] = 1

                    try:
                        next_day['year'] = getattr(getattr(year_data, 'next_year'), 'number')
                    except (AttributeError, YearData.DoesNotExist):
                        next_day['year'] = None

                    if not next_day['year']:
                        next_day = None

        except AttributeError:
            params = {'type': 'error', 'error_type': 'month'}
            print(6)

    if not params:
        params = {
            'type': 'day',
            'root': '../../../',
            'year_data': year_data,
            'month_data': month_data,
            'day': day,
            'events': events,
            'previous_day': previous_day,
            'next_day': next_day,
        }

    return render(request, 'faerun_calendar/index.html', params)


def month_page(request, year: int, month: int):
    return HttpResponseRedirect(f'../../{year}')


def year_page(request, year: int):
    params = None

    try:
        year_data = YearData.objects.get(number=year)
    except YearData.DoesNotExist:
        params = {'type': 'error', 'error_type': 'year'}

    if not params:
        try:
            month_data = MonthData.objects.all().order_by('number')
            calendar_data = CalendarData.objects.first()

            months = []
            for month in month_data:
                is_oneday_month = getattr(month, 'is_oneday')
                is_leap_month = getattr(month, 'is_leap_month')
                is_leap_year = getattr(year_data, 'is_leap')

                if is_leap_month and not is_leap_year:
                    continue
                m = {
                    'id': getattr(month, 'id'),
                    'number': getattr(month, 'number'),
                    'name': getattr(month, 'name'),
                    'folkname': getattr(month, 'folkname'),
                    'is_oneday': getattr(month, 'is_oneday'),
                    'days': []
                }
                for i in range(0, 1 if is_oneday_month else 30):
                    day = {
                        'number': i+1,
                        'event_counts': Event.objects.filter(year=year_data.id, month=month.id, day=i+1,
                                                             is_suggested=False, is_only_for_gm=False).count()
                    }
                    m['days'].append(day)

                months.append(m)

            params = {
                'type': 'year',
                'root': '../',
                'calendar_data': calendar_data,
                'year_data': year_data,
                'months': months,
            }
        except AttributeError:
            params = {'type': 'error', 'error_type': 'unknown'}

    return render(request, 'faerun_calendar/index.html', params)


def index(request):
    try:
        current_year = getattr(getattr(CalendarData.objects.first(), 'current_year'), 'number')
    except AttributeError:
        current_year = 0

    return HttpResponseRedirect(f'{current_year}')