import datetime as dt

import pytz
from django.http import JsonResponse
from django.views.generic import FormView
from django.views.generic.base import TemplateView
from pretalx.agenda.views.schedule import ScheduleMixin
from pretalx.common.mixins.views import EventPermissionRequired, PermissionRequired
from pretalx.schedule.exporters import ScheduleData

from .forms import BroadcastToolsSettingsForm
from .utils.placeholders import placeholders


class BroadcastToolsLowerThirdsView(TemplateView):
    template_name = "pretalx_broadcast_tools/lower_thirds.html"


class BroadcastToolsOrgaView(PermissionRequired, FormView):
    form_class = BroadcastToolsSettingsForm
    permission_required = "orga.change_settings"
    template_name = "pretalx_broadcast_tools/orga.html"

    def get_success_url(self):
        return self.request.path

    def form_valid(self, form):
        form.save()
        return super().form_valid(form)

    def get_object(self):
        return self.request.event

    def get_form_kwargs(self):
        kwargs = super().get_form_kwargs()
        return {
            "obj": self.request.event,
            "attribute_name": "settings",
            "locales": self.request.event.locales,
            **kwargs,
        }


class BroadcastToolsEventInfoView(TemplateView):
    def get(self, request, *args, **kwargs):
        color = self.request.event.primary_color or "#3aa57c"
        return JsonResponse(
            {
                "slug": self.request.event.slug,
                "name": str(self.request.event.name),
                "no_talk": str(
                    self.request.event.settings.broadcast_tools_lower_thirds_no_talk_info
                ),
                "color": color,
            },
        )


class BroadcastToolsScheduleView(EventPermissionRequired, ScheduleMixin, TemplateView):
    permission_required = "agenda.view_schedule"

    def get(self, request, *args, **kwargs):
        schedule = ScheduleData(
            event=self.request.event,
            schedule=self.schedule,
        )
        tz = pytz.timezone(schedule.event.timezone)
        infoline = str(
            schedule.event.settings.broadcast_tools_lower_thirds_info_string or ""
        )
        try:
            return JsonResponse(
                {
                    "rooms": sorted(
                        {
                            str(room["name"])
                            for day in schedule.data
                            for room in day["rooms"]
                        }
                    ),
                    "talks": [
                        {
                            "id": talk.submission.id,
                            "start": talk.start.astimezone(tz).isoformat(),
                            "end": (talk.start + dt.timedelta(minutes=talk.duration))
                            .astimezone(tz)
                            .isoformat(),
                            "slug": talk.frab_slug,
                            "title": talk.submission.title,
                            "persons": sorted(
                                {
                                    person.get_display_name()
                                    for person in talk.submission.speakers.all()
                                }
                            ),
                            "track": {
                                "color": talk.submission.track.color,
                                "name": str(talk.submission.track.name),
                            }
                            if talk.submission.track
                            else None,
                            "room": str(room["name"]),
                            "infoline": infoline.format(**placeholders(schedule, talk)),
                        }
                        for day in schedule.data
                        for room in day["rooms"]
                        for talk in room["talks"]
                    ],
                },
            )
        except KeyError as e:
            key = str(e)[1:-1]
            return JsonResponse(
                {
                    "error": [
                        f"Could not find value for placeholder {{{key}}} in info line.",
                        f"If you want to use {{{key}}} without evaluating it, please use as follows: {{{{{key}}}}}",
                    ],
                }
            )
        except Exception as e:
            return JsonResponse(
                {
                    "error": [
                        repr(e),
                    ],
                }
            )