"""
Django Forms for interacting with Order objects
"""

# -*- coding: utf-8 -*-
from __future__ import unicode_literals

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

from mptt.fields import TreeNodeChoiceField

from djmoney.forms.fields import MoneyField

from InvenTree.forms import HelperForm
from InvenTree.fields import RoundingDecimalFormField
from InvenTree.fields import DatePickerFormField

from InvenTree.helpers import clean_decimal

from common.models import InvenTreeSetting
from common.forms import MatchItemForm

import part.models

from stock.models import StockLocation
from .models import PurchaseOrder, PurchaseOrderLineItem, PurchaseOrderAttachment
from .models import SalesOrder, SalesOrderLineItem, SalesOrderAttachment
from .models import SalesOrderAllocation


class IssuePurchaseOrderForm(HelperForm):

    confirm = forms.BooleanField(required=True, initial=False, label=_('Confirm'), help_text=_('Place order'))

    class Meta:
        model = PurchaseOrder
        fields = [
            'confirm',
        ]


class CompletePurchaseOrderForm(HelperForm):

    confirm = forms.BooleanField(required=True, label=_('Confirm'), help_text=_("Mark order as complete"))

    class Meta:
        model = PurchaseOrder
        fields = [
            'confirm',
        ]


class CancelPurchaseOrderForm(HelperForm):

    confirm = forms.BooleanField(required=True, label=_('Confirm'), help_text=_('Cancel order'))

    class Meta:
        model = PurchaseOrder
        fields = [
            'confirm',
        ]


class CancelSalesOrderForm(HelperForm):

    confirm = forms.BooleanField(required=True, label=_('Confirm'), help_text=_('Cancel order'))

    class Meta:
        model = SalesOrder
        fields = [
            'confirm',
        ]


class ShipSalesOrderForm(HelperForm):

    confirm = forms.BooleanField(required=True, label=_('Confirm'), help_text=_('Ship order'))

    class Meta:
        model = SalesOrder
        fields = [
            'confirm',
        ]


class ReceivePurchaseOrderForm(HelperForm):

    location = TreeNodeChoiceField(
        queryset=StockLocation.objects.all(),
        required=True,
        label=_("Destination"),
        help_text=_("Receive parts to this location"),
    )

    class Meta:
        model = PurchaseOrder
        fields = [
            "location",
        ]


class EditPurchaseOrderForm(HelperForm):
    """ Form for editing a PurchaseOrder object """

    def __init__(self, *args, **kwargs):

        self.field_prefix = {
            'reference': 'PO',
            'link': 'fa-link',
            'target_date': 'fa-calendar-alt',
        }

        self.field_placeholder = {
            'reference': _('Purchase Order reference'),
        }

        super().__init__(*args, **kwargs)

    target_date = DatePickerFormField(
        label=_('Target Date'),
        help_text=_('Target date for order delivery. Order will be overdue after this date.'),
    )

    class Meta:
        model = PurchaseOrder
        fields = [
            'reference',
            'supplier',
            'supplier_reference',
            'description',
            'target_date',
            'link',
            'responsible',
        ]


class EditSalesOrderForm(HelperForm):
    """ Form for editing a SalesOrder object """

    def __init__(self, *args, **kwargs):

        self.field_prefix = {
            'reference': 'SO',
            'link': 'fa-link',
            'target_date': 'fa-calendar-alt',
        }

        self.field_placeholder = {
            'reference': _('Enter sales order number'),
        }

        super().__init__(*args, **kwargs)

    target_date = DatePickerFormField(
        label=_('Target Date'),
        help_text=_('Target date for order completion. Order will be overdue after this date.'),
    )

    class Meta:
        model = SalesOrder
        fields = [
            'reference',
            'customer',
            'customer_reference',
            'description',
            'target_date',
            'link',
            'responsible',
        ]


class EditPurchaseOrderAttachmentForm(HelperForm):
    """ Form for editing a PurchaseOrderAttachment object """

    class Meta:
        model = PurchaseOrderAttachment
        fields = [
            'order',
            'attachment',
            'comment'
        ]


class EditSalesOrderAttachmentForm(HelperForm):
    """ Form for editing a SalesOrderAttachment object """

    class Meta:
        model = SalesOrderAttachment
        fields = [
            'order',
            'attachment',
            'comment'
        ]


class EditPurchaseOrderLineItemForm(HelperForm):
    """ Form for editing a PurchaseOrderLineItem object """

    quantity = RoundingDecimalFormField(max_digits=10, decimal_places=5, label=_('Quantity'))

    class Meta:
        model = PurchaseOrderLineItem
        fields = [
            'order',
            'part',
            'quantity',
            'reference',
            'purchase_price',
            'destination',
            'notes',
        ]


class EditSalesOrderLineItemForm(HelperForm):
    """ Form for editing a SalesOrderLineItem object """

    quantity = RoundingDecimalFormField(max_digits=10, decimal_places=5, label=_('Quantity'))

    class Meta:
        model = SalesOrderLineItem
        fields = [
            'order',
            'part',
            'quantity',
            'reference',
            'sale_price',
            'notes'
        ]


class AllocateSerialsToSalesOrderForm(forms.Form):
    """
    Form for assigning stock to a sales order,
    by serial number lookup
    """

    line = forms.ModelChoiceField(
        queryset=SalesOrderLineItem.objects.all(),
    )

    part = forms.ModelChoiceField(
        queryset=part.models.Part.objects.all(),
    )

    serials = forms.CharField(
        label=_("Serial Numbers"),
        required=True,
        help_text=_('Enter stock item serial numbers'),
    )

    quantity = forms.IntegerField(
        label=_('Quantity'),
        required=True,
        help_text=_('Enter quantity of stock items'),
        initial=1,
        min_value=1
    )

    class Meta:

        fields = [
            'line',
            'part',
            'serials',
            'quantity',
        ]


class CreateSalesOrderAllocationForm(HelperForm):
    """
    Form for creating a SalesOrderAllocation item.
    """

    quantity = RoundingDecimalFormField(max_digits=10, decimal_places=5, label=_('Quantity'))

    class Meta:
        model = SalesOrderAllocation

        fields = [
            'line',
            'item',
            'quantity',
        ]


class EditSalesOrderAllocationForm(HelperForm):
    """
    Form for editing a SalesOrderAllocation item
    """

    quantity = RoundingDecimalFormField(max_digits=10, decimal_places=5, label=_('Quantity'))

    class Meta:
        model = SalesOrderAllocation

        fields = [
            'line',
            'item',
            'quantity']


class OrderMatchItemForm(MatchItemForm):
    """ Override MatchItemForm fields """

    def get_special_field(self, col_guess, row, file_manager):
        """ Set special fields """

        # set quantity field
        if 'quantity' in col_guess.lower():
            return forms.CharField(
                required=False,
                widget=forms.NumberInput(attrs={
                    'name': 'quantity' + str(row['index']),
                    'class': 'numberinput',
                    'type': 'number',
                    'min': '0',
                    'step': 'any',
                    'value': clean_decimal(row.get('quantity', '')),
                })
            )
        # set price field
        elif 'price' in col_guess.lower():
            return MoneyField(
                label=_(col_guess),
                default_currency=InvenTreeSetting.get_setting('INVENTREE_DEFAULT_CURRENCY'),
                decimal_places=5,
                max_digits=19,
                required=False,
                default_amount=clean_decimal(row.get('purchase_price', '')),
            )

        # return default
        return super().get_special_field(col_guess, row, file_manager)