# -*- encoding: utf-8 -*-
##############################################################################
#
#    OpenERP, Open Source Management Solution
#
#    Copyright (C) 2010-2012 OpenERP s.a. (<http://openerp.com>).
#    Copyright (c) 2014 Noviat nv/sa (www.noviat.com). All rights reserved.
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU Affero General Public License as
#    published by the Free Software Foundation, either version 3 of the
#    License, or (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#    GNU Affero General Public License for more details.
#
#    You should have received a copy of the GNU Affero General Public License
#    along with this program. If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################

import time
from lxml import etree
from openerp.osv import fields, orm


class asset_modify(orm.TransientModel):
    _name = 'asset.modify'
    _description = 'Modify Asset'

    _columns = {
        'name': fields.char('Reason', size=64, required=True),
        'method_number': fields.integer(
            'Number of Depreciations/Years', required=True),
        'method_period': fields.selection([
            ('month', 'Month'),
            ('quarter', 'Quarter'),
            ('year', 'Year'),
            ], 'Period Length',
            help="Period length for the depreciation accounting entries"),
        'method_end': fields.date('Ending date'),
        'note': fields.text('Notes'),
    }

    def fields_view_get(self, cr, uid, view_id=None, view_type='form',
                        context=None, toolbar=False, submenu=False):
        if not context:
            context = {}
        asset_obj = self.pool.get('account.asset.asset')
        result = super(asset_modify, self).fields_view_get(
            cr, uid, view_id, view_type, context=context,
            toolbar=toolbar, submenu=submenu)
        asset_id = context.get('active_id', False)
        active_model = context.get('active_model', '')
        if active_model == 'account.asset.asset' and asset_id:
            asset = asset_obj.browse(cr, uid, asset_id, context=context)
            doc = etree.XML(result['arch'])
            if asset.method_time == 'number':
                node_me = doc.xpath("//field[@name='method_end']")[0]
                node_me.set('invisible', '1')
            elif asset.method_time == 'end':
                node_mn = doc.xpath("//field[@name='method_number']")[0]
                node_mn.set('invisible', '1')
            elif asset.method_time == 'year':
                node_me = doc.xpath("//field[@name='method_end']")[0]
                node_me.set('invisible', '1')
            result['arch'] = etree.tostring(doc)
        return result

    def default_get(self, cr, uid, fields, context=None):
        if not context:
            context = {}
        asset_obj = self.pool.get('account.asset.asset')
        res = super(asset_modify, self).default_get(
            cr, uid, fields, context=context)
        asset_id = context.get('active_id', False)
        asset = asset_obj.browse(cr, uid, asset_id, context=context)
        if 'name' in fields:
            res.update({'name': asset.name})
        if 'method_number' in fields and \
                asset.method_time in ['number', 'year']:
            res.update({'method_number': asset.method_number})
        if 'method_period' in fields:
            res.update({'method_period': asset.method_period})
        if 'method_end' in fields and asset.method_time == 'end':
            res.update({'method_end': asset.method_end})
        return res

    def modify(self, cr, uid, ids, context=None):
        """
        Modifies the duration of asset for calculating depreciation
        and maintains the history of old values.
        """
        if not context:
            context = {}
        asset_obj = self.pool.get('account.asset.asset')
        history_obj = self.pool.get('account.asset.history')
        asset_id = context.get('active_id', False)
        asset = asset_obj.browse(cr, uid, asset_id, context=context)
        data = self.browse(cr, uid, ids[0], context=context)
        history_vals = {
            'asset_id': asset_id,
            'name': data.name,
            'method_time': asset.method_time,
            'method_number': asset.method_number,
            'method_period': asset.method_period,
            'method_end': asset.method_end,
            'user_id': uid,
            'date': time.strftime('%Y-%m-%d'),
            'note': data.note,
        }
        history_obj.create(cr, uid, history_vals, context=context)
        asset_vals = {
            'method_number': data.method_number,
            'method_period': data.method_period,
            'method_end': data.method_end,
        }
        asset_obj.write(cr, uid, [asset_id], asset_vals, context=context)
        asset_obj.compute_depreciation_board(
            cr, uid, [asset_id], context=context)
        return {'type': 'ir.actions.act_window_close'}

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