import decimal

from django.utils.translation import gettext_lazy as _
from rest_framework.fields import DecimalField

from .......base import IntegrationFormFieldPlugin
from .... import UID as INTEGRATE_WITH_UID
from ....base import (
    DRFIntegrationFormElementPluginProcessor,
    DRFSubmitPluginFormDataMixin,
)
from . import UID

__title__ = (
    "fobi.contrib.apps.drf_integration.form_elements.fields." "decimal.base"
)
__author__ = "Artur Barseghyan <artur.barseghyan@gmail.com>"
__copyright__ = "2014-2019 Artur Barseghyan"
__license__ = "GPL 2.0/LGPL 2.1"
__all__ = ("DecimalInputPlugin",)


class DecimalInputPlugin(
    IntegrationFormFieldPlugin, DRFSubmitPluginFormDataMixin
):
    """DecimalField plugin."""

    uid = UID
    integrate_with = INTEGRATE_WITH_UID
    name = _("Decimal")
    group = _("Fields")

    def get_custom_field_instances(
        self,
        form_element_plugin,
        request=None,
        form_entry=None,
        form_element_entries=None,
        **kwargs,
    ):
        """Get form field instances."""
        field_kwargs = {
            "required": form_element_plugin.data.required,
            "label": form_element_plugin.data.label,
            "help_text": form_element_plugin.data.help_text,
        }
        field_metadata = {"placeholder": form_element_plugin.data.placeholder}

        if form_element_plugin.data.initial:
            data_initial = decimal.Decimal(
                str(form_element_plugin.data.initial)
            )
            field_kwargs.update({"initial": data_initial})

        if form_element_plugin.data.max_value:
            data_max_value = decimal.Decimal(
                str(form_element_plugin.data.max_value)
            )
            field_kwargs.update({"max_value": data_max_value})

        if form_element_plugin.data.min_value:
            data_min_value = decimal.Decimal(
                str(form_element_plugin.data.min_value)
            )
            field_kwargs.update({"min_value": data_min_value})

        if form_element_plugin.data.max_digits:
            data_max_digits = int(form_element_plugin.data.max_digits)
            field_kwargs.update({"max_digits": data_max_digits})
            field_metadata.update({"max_digits": data_max_digits})
        else:
            field_kwargs.update({"max_digits": 10})
            field_metadata.update({"max_digits": 10})

        if form_element_plugin.data.decimal_places:
            data_decimal_places = int(form_element_plugin.data.decimal_places)
            field_kwargs.update({"decimal_places": data_decimal_places})
            field_metadata.update({"decimal_places": data_decimal_places})
        else:
            field_kwargs.update({"decimal_places": 5})
            field_metadata.update({"decimal_places": 5})

        return [
            DRFIntegrationFormElementPluginProcessor(
                field_class=DecimalField,
                field_kwargs=field_kwargs,
                field_metadata=field_metadata,
            )
        ]
