# This file is part of Tryton.  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.modules.account_product.product import (
    account_used, template_property)
from trytond.pool import Pool, PoolMeta
from trytond.pyson import Eval


class Category(metaclass=PoolMeta):
    __name__ = 'product.category'
    account_depreciation = fields.MultiValue(fields.Many2One('account.account',
            'Account Depreciation', domain=[
                ('type.fixed_asset', '=', True),
                ('company', '=', Eval('context', {}).get('company', -1)),
                ],
            states={
                'invisible': (~Eval('context', {}).get('company')
                    | Eval('account_parent')
                    | ~Eval('accounting', False)),
                }))
    account_asset = fields.MultiValue(fields.Many2One('account.account',
            'Account Asset',
            domain=[
                ('type.fixed_asset', '=', True),
                ('company', '=', Eval('context', {}).get('company', -1)),
                ],
            states={
                'invisible': (~Eval('context', {}).get('company')
                    | Eval('account_parent')
                    | ~Eval('accounting', False)),
                }))

    @classmethod
    def multivalue_model(cls, field):
        pool = Pool()
        if field in {'account_depreciation', 'account_asset'}:
            return pool.get('product.category.account')
        return super().multivalue_model(field)

    @property
    @account_used('account_depreciation')
    def account_depreciation_used(self):
        pass

    @property
    @account_used('account_asset')
    def account_asset_used(self):
        pass

    @fields.depends(
        'accounting',
        'account_depreciation',
        'account_asset')
    def on_change_accounting(self):
        super().on_change_accounting()
        if not self.accounting:
            self.account_depreciation = None
            self.account_asset = None


class CategoryAccount(metaclass=PoolMeta):
    __name__ = 'product.category.account'
    account_depreciation = fields.Many2One(
        'account.account', "Account Depreciation",
        domain=[
            ('type.fixed_asset', '=', True),
            ('company', '=', Eval('company', -1)),
            ])
    account_asset = fields.Many2One(
        'account.account', "Account Asset",
        domain=[
            ('type.fixed_asset', '=', True),
            ('company', '=', Eval('company', -1)),
            ])


class Template(metaclass=PoolMeta):
    __name__ = 'product.template'
    depreciable = fields.Boolean('Depreciable', states={
            'invisible': Eval('type', '') != 'assets',
            })
    depreciation_duration = fields.Integer(
        "Depreciation Duration",
        states={
            'invisible': (~Eval('depreciable')
                | (Eval('type', '') != 'assets')),
            },
        help='In months')

    @property
    @account_used('account_depreciation', 'account_category')
    def account_depreciation_used(self):
        pass

    @property
    @account_used('account_asset', 'account_category')
    def account_asset_used(self):
        pass


class Product(metaclass=PoolMeta):
    __name__ = 'product.product'

    account_depreciation_used = template_property('account_depreciation_used')
    account_asset_used = template_property('account_asset_used')