import datetime

from django.shortcuts import get_object_or_404
from django.urls import reverse
from django.views import generic

from gym.models import Room, Equipment, Setting, Session, Round


class RoomListView(generic.ListView):
    queryset = Room.objects.all().order_by('name')
    context_object_name = 'rooms'
    template_name = 'gym/rooms.html'


class RoomDetailView(generic.DetailView):
    model = Room
    context_object_name = 'room'
    template_name = 'gym/room.html'


class EquipmentDetailView(generic.DetailView):
    model = Equipment
    context_object_name = 'equipment'
    template_name = 'gym/equipment.html'
    session = None

    def dispatch(self, request, *args, **kwargs):
        default_session_id = self.request.GET.get('session')
        if default_session_id:
            self.session = get_object_or_404(Room, pk=default_session_id)

        return super().dispatch(request, *args, **kwargs)

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['session'] = self.session
        return context


class EquipmentCreateView(generic.CreateView):
    model = Equipment
    fields = ['room', 'name']
    template_name = 'gym/equipment_edit.html'
    room = None

    def get_success_url(self):
        return reverse('equipment-detail', kwargs={'pk': self.object.pk})

    def dispatch(self, request, *args, **kwargs):
        default_room_id = self.request.GET.get('room')
        if default_room_id:
            self.room = get_object_or_404(Room, pk=default_room_id)

        return super().dispatch(request, *args, **kwargs)

    def get_initial(self):
        initial = super().get_initial()
        initial['room'] = self.room

        return initial


class SettingCreateView(generic.CreateView):
    model = Setting
    fields = ['equipment', 'name', 'value']
    template_name = 'gym/setting_edit.html'
    equipment = None

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['title'] = 'Ajouter'
        context['equipment'] = self.equipment
        return context

    def dispatch(self, request, *args, **kwargs):
        default_equipment_id = self.request.GET.get('equipment')
        if default_equipment_id:
            self.equipment = get_object_or_404(Equipment, pk=default_equipment_id)

        return super().dispatch(request, *args, **kwargs)

    def get_initial(self):
        initial = super().get_initial()
        initial['equipment'] = self.equipment

        return initial

    def get_success_url(self):
        return reverse('equipment-detail', kwargs={'pk': self.object.equipment.pk})


class SettingUpdateView(generic.UpdateView):
    model = Setting
    fields = ['equipment', 'name', 'value']
    template_name = 'gym/setting_edit.html'

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['edit'] = True
        context['title'] = 'Modifier'
        context['equipment'] = self.object.equipment
        return context

    def get_success_url(self):
        return reverse('equipment-detail', kwargs={'pk': self.object.equipment.pk})


class SettingDeleteView(generic.DeleteView):
    model = Setting
    template_name = 'gym/setting_confirm_delete.html'
    context_object_name = 'setting'

    def get_success_url(self):
        return reverse('equipment-detail', kwargs={'pk': self.object.equipment.pk})


class SessionCreateView(generic.CreateView):
    model = Session
    fields = ['room', 'start']
    template_name = 'gym/session_edit.html'
    room = None

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['title'] = 'Démarrer'
        context['room'] = self.room
        return context

    def get_success_url(self):
        return reverse('session-detail', kwargs={'pk': self.object.pk})

    def dispatch(self, request, *args, **kwargs):
        self.room = get_object_or_404(Room, pk=self.request.GET.get('room'))
        return super().dispatch(request, *args, **kwargs)

    def get_initial(self):
        initial = super().get_initial()
        initial['room'] = self.room
        initial['start'] = datetime.datetime.now()

        return initial


class SessionDetailView(generic.DetailView):
    model = Session
    context_object_name = 'session'
    template_name = 'gym/session_detail.html'


class RoundCreateView(generic.CreateView):
    model = Round
    fields = ['equipment', 'session', 'theoretical_max_percentage', 'chosen_weight', 'notes']
    template_name = 'gym/round_edit.html'
    equipment = None
    session = None

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['title'] = 'Commencer'
        context['equipment'] = self.equipment
        context['session'] = self.session
        return context

    def dispatch(self, request, *args, **kwargs):
        self.equipment = get_object_or_404(Equipment, pk=self.request.GET.get('equipment'))
        self.session = get_object_or_404(Equipment, pk=self.request.GET.get('session'))

        return super().dispatch(request, *args, **kwargs)

    def get_initial(self):
        theoretical_max_percentage = 65
        initial = super().get_initial()
        initial['equipment'] = self.equipment
        initial['session'] = self.session
        initial['repetition_number'] = 3
        initial['theoretical_max_percentage'] = theoretical_max_percentage
        proposed_weight = 0
        theoretical_max = self.equipment.last_theoretical_max
        if theoretical_max:
            proposed_weight = theoretical_max.value * theoretical_max_percentage / 100
        initial['chosen_weight'] = proposed_weight

        return initial

    def get_success_url(self):
        return reverse('equipment-detail', kwargs={'pk': self.object.equipment.pk})