from trytond.pool import Pool, PoolMeta
from trytond.model import (
    ModelSQL, ModelView, Workflow, fields)
from trytond.modules.company.model import set_employee
from trytond.exceptions import UserError


class Subscription(metaclass=PoolMeta):
    __name__ = 'sale.subscription'

    equipments = fields.Many2Many('sale.subscription-optical_equipment.equipment', 'subscription',
                                  'equipment', "Equipments")
    @classmethod
    @ModelView.button
    @Workflow.transition('running')
    @set_employee('run_by')
    def run(cls, subscriptions):
        pool = Pool()
        Equipment = pool.get('optical_equipment.equipment')
        Line = pool.get('sale.subscription.line')
        lines = []
        subscription = subscriptions[0]
        
class SubscriptionEquipment(ModelSQL):
    'Optical Equipment - Subscription'
    __name__ = 'sale.subscription-optical_equipment.equipment'
    
    subscription = fields.Many2One('sale.subscription', 'Subscription', select=True)
    equipment = fields.Many2One('optical_equipment.equipment', 'Equipment', select=True,
                                domain=[('state', '=', 'registred'),
                                        ('state', '=', 'uncontrated')],
                                depends=['state'])

    
class Line(metaclass=PoolMeta):
    __name__ = 'sale.subscriptioin.line'