# -*- coding: utf-8 -*-

from odoo import fields, models, api, _
from odoo.exceptions import UserError
from lxml import html

class Invoice(models.Model):
    _inherit = "account.invoice"

    dealer_discount = fields.Boolean("Add Dealer Discount", readonly=True, states={'draft': [('readonly', False)]},)
    dealer_discount_type = fields.Selection([('fixed','Fixed'),('percentage','Percentage')],
        "Discount Type", readonly=True, states={'draft': [('readonly', False)]}, default='fixed')
    dealer_discount_amount = fields.Float("Discount Amount", readonly=True, states={'draft': [('readonly', False)]},)
    dealer_discount_percentage = fields.Float("Discount Percentage", readonly=True, states={'draft': [('readonly', False)]},)

    @api.multi
    def _dealer_discount_unset(self):
        if self.env.user.company_id.invoice_dealer_discount_product_id:
            self.env['account.invoice.line'].search([('invoice_id', 'in', self.ids), ('product_id', '=', self.env.user.company_id.invoice_dealer_discount_product_id.id)]).unlink()

    @api.multi
    def create_dealer_discount(self):
        InvoiceLine = self.env['account.invoice.line']

        discount_product_id = self.env.user.company_id.invoice_dealer_discount_product_id
        if not discount_product_id:
            raise UserError(_('Please set Invoice Dealer Discount product in General Settings first.'))

        # Remove Discount line first
        self._dealer_discount_unset()

        account_id = discount_product_id.property_account_income_id.id
        if not account_id:
            prop = self.env['ir.property'].get('property_account_income_categ_id', 'product.category')
            account_id = prop and prop.id or False

        for invoice in self:
            amount = 0

            if discount_product_id.product_description:
                discount_text = html.fromstring(discount_product_id.product_description).text_content()
            else:
                discount_text = discount_product_id.name

            # if invoice.dealer_discount_type == 'fixed':
            #     amount = invoice.dealer_discount_amount
            # if invoice.dealer_discount_type == 'percentage':
            #     amount = (invoice.amount_total * invoice.dealer_discount_percentage)/100

            if invoice.dealer_discount_type == 'fixed':
                amount = invoice.dealer_discount_amount
            else:
                sep = "; "
                discount_text = "-" + str(invoice.dealer_discount_percentage) + "% " + discount_text + ", "
                discount_pos = ""
                n=0
                nd=0
                for line in invoice.invoice_line_ids:
                    n += 1
                    if not line.product_id.product_tmpl_id.material_type_id.no_dealer_discount:
                        nd += 1
                        amount += (line.price_subtotal * invoice.dealer_discount_percentage)/100
                        discount_pos +=  str(n)+sep
                if nd>1:
                    discount_text = discount_text + "Positionen: "
                else:
                    discount_text = discount_text + "Position: "

                discount_text = discount_text + discount_pos.rstrip(sep)

            # Apply fiscal position
            taxes = discount_product_id.taxes_id.filtered(lambda t: t.company_id.id == invoice.company_id.id)
            taxes_ids = taxes.ids
            if invoice.partner_id and self.fiscal_position_id:
                taxes_ids = self.fiscal_position_id.map_tax(taxes, discount_product_id, invoice.partner_id).ids

            layout_category_id = self.env['sale.layout_category'].search([('name', '=', discount_product_id.manufacturing_number)])

            if amount > 0:
                # Create the Invoice line
                InvoiceLine.create({
                    'name': discount_text,
                    'price_unit': -amount,
                    'account_id': account_id,
                    'quantity': 1.0,
                    'discount': 0.0,
                    'uom_id': discount_product_id.uom_id.id,
                    'product_id': discount_product_id.id,
                    'invoice_id': invoice.id,
                    'invoice_line_tax_ids': [(6, 0, taxes_ids)],
                    'layout_category_id':layout_category_id.id,
                    'sequence': 99999,
                })
        return True