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

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

class SaleOrder(models.Model):
    _inherit = "sale.order"

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

    @api.multi
    def _dealer_discount_unset(self):
        if self.env.user.company_id.sale_dealer_discount_product_id:
            self.env['sale.order.line'].search([('order_id', 'in', self.ids), ('product_id', '=', self.env.user.company_id.sale_dealer_discount_product_id.id)]).unlink()

    @api.multi
    def create_dealer_discount(self):
        Line = self.env['sale.order.line']

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

        # Remove Discount line first
        self._dealer_discount_unset()

        for order in self:
            amount = 0
            if order.dealer_discount_type == 'fixed':
                discount_text = discount_product_id.name
                amount = order.dealer_discount_amount
            else:
                sep = "; "
                discount_text = "-" + str(order.dealer_discount_percentage) + "% " + discount_product_id.name + ", "
                discount_pos = ""
                n=0
                nd=0
                for line in order.order_line:
                    n += 1
                    if not line.product_id.product_tmpl_id.material_type_id.no_dealer_discount:
                        nd += 1
                        amount += (line.price_subtotal * order.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)

            if amount > 0:
                # Create the Sale line
                Line.create({
                    'name': discount_text,
                    'price_unit': -amount,
                    'product_uom_qty': 1.0,
                    'discount': 0.0,
                    'product_uom': discount_product_id.uom_id.id,
                    'product_id': discount_product_id.id,
                    'order_id': order.id,
                    'sequence': 99999,
                })

        return True