# The COPYRIGHT file at the top level of this repository contains the full
# copyright notices and license terms.
from trytond.model import fields
from trytond.pool import PoolMeta
from trytond.pyson import Eval, In
from trytond.modules.product import price_digits

__all__ = ['SaleOpportunity', 'SaleOpportunityLine']

_STATES_STOP = {
    'readonly': In(Eval('state'), ['converted', 'won', 'lost', 'cancelled']),
}
_DEPENDS_STOP = ['state']


class SaleOpportunity(metaclass=PoolMeta):
    __name__ = "sale.opportunity"

    customer_comment = fields.Char('Customer Comment', states=_STATES_STOP,
        depends=_DEPENDS_STOP)
    payment_term_comment = fields.Char('Payment Term Comment',
        states=_STATES_STOP, depends=_DEPENDS_STOP)


class SaleOpportunityLine(metaclass=PoolMeta):
    __name__ = "sale.opportunity.line"

    customer_comment = fields.Char('Customer Comment',
        states={
            'readonly': ~Eval('opportunity_state').in_(['lead', 'opportunity'])
            }, depends=['opportunity_state'])
    lead_time = fields.Char('Lead Time',
        states={
            'readonly': ~Eval('opportunity_state').in_(['lead', 'opportunity'])
            }, depends=['opportunity_state'], help='Time needed to supply')
    validity_period = fields.Char('Validity Period',
        states={
            'readonly': ~Eval('opportunity_state').in_(['lead', 'opportunity'])
            }, depends=['opportunity_state'])
    sale_price = fields.Numeric('Sale Price', digits=price_digits,
        states={
            'readonly': ~Eval('opportunity_state').in_(['lead', 'opportunity'])
            }, depends=['opportunity_state'])
    currency = fields.Function(fields.Many2One('currency.currency',
        'Currency'), 'on_change_with_currency')


@classmethod
def __setup__(cls):
    super(SaleOpportunityLine, cls).__setup__()
    clause = ('salable', '=', True)
    if clause in cls.product.domain:
        cls.product.domain.remove(clause)


@fields.depends('opportunity', '_parent_opportunity.currency')
def on_change_with_currency(self, name=None):
    if self.opportunity:
        return self.opportunity.currency.id