from trytond.model import Model, ModelSQL, ModelView, fields
from trytond.pyson import Eval


class Device(Model):
    'Devices'
    __name__ = 'sale_device'

    name = fields.Char("Name")
    type_ = fields.Selection([
        ('usb', "USB"),
        ('network', "Network")], "Type")
    ip_address = fields.Char(
        'IP Address or Network',
        states={'required': Eval('type_') == 'network',
                'invisible': Eval('type_') == 'usb'},
        help='IPv4 or IPv6 IP address or network. \
        Valid values include: 192.168.0.26 or 192.168.0.0/24')
    idVendor = fields.Char('idVendor', states={
        'required': Eval('type_') == 'usb',
        'invisible': Eval('type_') != 'usb',
    })
    idProduct = fields.Char('idProduct', states={
        'required': Eval('type_') == 'usb',
        'invisible': Eval('type_') != 'usb',
    })

    @classmethod
    def default_type_(cls):
        return 'network'


class Printer(Device, ModelSQL, ModelView):
    'Printer'
    __name__ = 'sale.printer'

    zone = fields.Selection([('bar', "Bar"),
                             ('kitchen', "Kitchen"),
                             ('reception', "Reception")], "Zone")
    shop = fields.Many2One('sale.shop', "Shop")
    api = fields.Many2One('sale.printer_api', "API")


class Api(Device, ModelSQL, ModelView):
    'Api printer'
    __name__ = 'sale.printer_api'