import ast

from django import forms
from django.contrib import admin
from django.contrib.admin import widgets as admin_widgets

from django_coreprotect.models import CoWorld, Preset
from django_coreprotect.utils import time_to_form, form_to_time


class PresetAdminForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super(PresetAdminForm, self).__init__(*args, **kwargs)

        worlds = tuple([(world.id, world.world) for world in CoWorld.objects.all()])
        self.fields['worlds'].widget = forms.SelectMultiple(choices=worlds)
        self.fields['date_from'].widget = admin_widgets.AdminSplitDateTime()
        self.fields['date_to'].widget = admin_widgets.AdminSplitDateTime()

        if self.instance:
            if "worlds" in self.initial and self.initial["worlds"]:
                self.initial["worlds"] = tuple(self.initial["worlds"])
            if "date_from" in self.initial and self.initial["date_from"]:
                self.initial["date_from"] = time_to_form(self.initial["date_from"])
            if "date_to" in self.initial and self.initial["date_to"]:
                self.initial["date_to"] = time_to_form(self.initial["date_to"])

    def clean(self):
        cleaned = super(PresetAdminForm, self).clean()
        worlds = cleaned.get("worlds", "")
        if worlds:
            worlds = ast.literal_eval(worlds)
            cleaned.update({"worlds": ",".join(worlds)})
        date_from = cleaned.get("date_from", "")
        if date_from:
            cleaned.update({"date_from": form_to_time(date_from)})
        date_to = cleaned.get("date_to", "")
        if date_to:
            cleaned.update({"date_to": form_to_time(date_to)})
        return cleaned

    class Meta:
        model = Preset
        fields = "__all__"


class PresetAdmin(admin.ModelAdmin):
    form = PresetAdminForm


try:
    admin.site.register(Preset, PresetAdmin)
except admin.sites.AlreadyRegistered:
    pass