import datetime

from django import forms
from django.utils.translation import gettext_lazy as _

from .widgets import DatePickerWidget, SlotPickerWidget

def get_hours():
    return [(x, datetime.time(x, 0)) for x in range(24)]
def get_interval():
    return [(x, datetime.timedelta(minutes=x)) for x in [15, 30, 60]]

class CreateEventForm(forms.Form):
    event_name = forms.CharField(label=_('Event name'), max_length=100, help_text=_('The name of your event. This will be displayed to participants.'))
    event_date = forms.Field(label=_('Event date'), widget=DatePickerWidget)
    start_time = forms.ChoiceField(label=_('Start time'), initial=9, choices=get_hours, help_text=_('The first time slot available for participants to select.'))
    end_time = forms.ChoiceField(label=_('End time'), initial=20, choices=get_hours, help_text=_('The last time slot available for participants to select.'))
    slot_interval = forms.ChoiceField(label=_('Time slot interval'), initial=15, choices=get_interval, help_text=_('The interval between time slots.'))

    def clean(self) -> dict:
        cleaned_data = super().clean()
        if (not "start_time" in cleaned_data) or (not "end_time" in cleaned_data):
            return cleaned_data

        if cleaned_data['start_time'] == cleaned_data['end_time']:
            self.add_error('start_time', _('Start time must be different from end time'))
        
        return cleaned_data

class LoginForm(forms.Form):
    username = forms.CharField(label=_('Username'), max_length=100, help_text=_('This will be displayed to other participants.'))
    password = forms.CharField(label=_('Password'), max_length=100, widget=forms.PasswordInput, required=False, help_text=_('Fill in a password to create a new account. Leave empty to login as a guest.'))

class UpdateSlotsForm(forms.Form):
    slots = forms.Field(label=_('Slots'), help_text=_('Click on a time slot to select it. Click again to deselect it. You can also drag the mouse to select multiple slots.'))

    def __init__(self, *args, event, n_slots, participant, **kwargs):
        super().__init__(*args, **kwargs)
        self.fields['slots'].widget = SlotPickerWidget(event=event, n_slots=n_slots, participant=participant)