from django import forms
from django.forms.fields import BaseTemporalField

from graphene import ID, Boolean, Float, Int, List, String, UUID
from graphene.types.datetime import Date, DateTime, Time

from .forms import GlobalIDFormField, GlobalIDMultipleChoiceField
from .utils import import_single_dispatch

singledispatch = import_single_dispatch()


@singledispatch
def convert_form_field(field):
    raise Exception(
        "Don't know how to convert the Django form field %s (%s) "
        "to Graphene type" %
        (field, field.__class__)
    )


@convert_form_field.register(BaseTemporalField)
@convert_form_field.register(forms.CharField)
@convert_form_field.register(forms.EmailField)
@convert_form_field.register(forms.SlugField)
@convert_form_field.register(forms.URLField)
@convert_form_field.register(forms.ChoiceField)
@convert_form_field.register(forms.RegexField)
@convert_form_field.register(forms.Field)
def convert_form_field_to_string(field):
    return String(description=field.help_text, required=field.required)


@convert_form_field.register(forms.UUIDField)
def convert_form_field_to_uuid(field):
    return UUID(description=field.help_text, required=field.required)


@convert_form_field.register(forms.IntegerField)
@convert_form_field.register(forms.NumberInput)
def convert_form_field_to_int(field):
    return Int(description=field.help_text, required=field.required)


@convert_form_field.register(forms.BooleanField)
def convert_form_field_to_boolean(field):
    return Boolean(description=field.help_text, required=True)


@convert_form_field.register(forms.NullBooleanField)
def convert_form_field_to_nullboolean(field):
    return Boolean(description=field.help_text)


@convert_form_field.register(forms.DecimalField)
@convert_form_field.register(forms.FloatField)
def convert_form_field_to_float(field):
    return Float(description=field.help_text, required=field.required)


@convert_form_field.register(forms.ModelMultipleChoiceField)
@convert_form_field.register(GlobalIDMultipleChoiceField)
def convert_form_field_to_list(field):
    return List(ID, required=field.required)


@convert_form_field.register(forms.DateField)
def convert_form_field_to_date(field):
    return Date(description=field.help_text, required=field.required)


@convert_form_field.register(forms.DateTimeField)
def convert_form_field_to_datetime(field):
    return DateTime(description=field.help_text, required=field.required)


@convert_form_field.register(forms.TimeField)
def convert_form_field_to_time(field):
    return Time(description=field.help_text, required=field.required)


@convert_form_field.register(forms.ModelChoiceField)
@convert_form_field.register(GlobalIDFormField)
def convert_form_field_to_id(field):
    return ID(required=field.required)