# -*- coding: utf-8 -*-
##################################################################################
#
# Copyright (c) 2005-2006 Axelor SARL. (http://www.axelor.com)
# and 2004-2010 Tiny SPRL (<http://tiny.be>).
#
# $Id: hr.py 4656 2006-11-24 09:58:42Z Cyp $
#
#     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 datetime
import math
import time
from operator import attrgetter
from openerp.exceptions import Warning
from openerp import tools
from openerp.osv import fields, osv
from openerp.tools.translate import _
class hr_holidays_status(osv.osv):
    _name = "hr.holidays.status"
    _description = "Leave Type"
    def get_days(self, cr, uid, ids, employee_id, context=None):
        result = dict((id, dict(max_leaves=0, leaves_taken=0, remaining_leaves=0,
                                virtual_remaining_leaves=0)) for id in ids)
        holiday_ids = self.pool['hr.holidays'].search(cr, uid, [('employee_id', '=', employee_id),
                                                                ('state', 'in', ['confirm', 'validate1', 'validate']),
                                                                ('holiday_status_id', 'in', ids)
                                                                ], context=context)
        for holiday in self.pool['hr.holidays'].browse(cr, uid, holiday_ids, context=context):
            status_dict = result[holiday.holiday_status_id.id]
            if holiday.type == 'add':
                status_dict['virtual_remaining_leaves'] += holiday.number_of_days_temp
                if holiday.state == 'validate':
                    status_dict['max_leaves'] += holiday.number_of_days_temp
                    status_dict['remaining_leaves'] += holiday.number_of_days_temp
            elif holiday.type == 'remove':  # number of days is negative
                status_dict['virtual_remaining_leaves'] -= holiday.number_of_days_temp
                if holiday.state == 'validate':
                    status_dict['leaves_taken'] += holiday.number_of_days_temp
                    status_dict['remaining_leaves'] -= holiday.number_of_days_temp
        return result
    def _user_left_days(self, cr, uid, ids, name, args, context=None):
        employee_id = False
        if context and 'employee_id' in context:
            employee_id = context['employee_id']
        else:
            employee_ids = self.pool.get('hr.employee').search(cr, uid, [('user_id', '=', uid)], context=context)
            if employee_ids:
                employee_id = employee_ids[0]
        if employee_id:
            res = self.get_days(cr, uid, ids, employee_id, context=context)
        else:
            res = dict((res_id, {'leaves_taken': 0, 'remaining_leaves': 0, 'max_leaves': 0}) for res_id in ids)
        return res
    _columns = {
        'name': fields.char('Leave Type', size=64, required=True, translate=True),
        'categ_id': fields.many2one('calendar.event.type', 'Meeting Type',
            help='Once a leave is validated, Odoo will create a corresponding meeting of this type in the calendar.'),
        'color_name': fields.selection([('red', 'Red'),('blue','Blue'), ('lightgreen', 'Light Green'), ('lightblue','Light Blue'), ('lightyellow', 'Light Yellow'), ('magenta', 'Magenta'),('lightcyan', 'Light Cyan'),('black', 'Black'),('lightpink', 'Light Pink'),('brown', 'Brown'),('violet', 'Violet'),('lightcoral', 'Light Coral'),('lightsalmon', 'Light Salmon'),('lavender', 'Lavender'),('wheat', 'Wheat'),('ivory', 'Ivory')],'Color in Report', required=True, help='This color will be used in the leaves summary located in Reporting\Leaves by Department.'),
        'limit': fields.boolean('Allow to Override Limit', help='If you select this check box, the system allows the employees to take more leaves than the available ones for this type and will not take them into account for the "Remaining Legal Leaves" defined on the employee form.'),
        'active': fields.boolean('Active', help="If the active field is set to false, it will allow you to hide the leave type without removing it."),
        'max_leaves': fields.function(_user_left_days, string='Maximum Allowed', help='This value is given by the sum of all holidays requests with a positive value.', multi='user_left_days'),
        'leaves_taken': fields.function(_user_left_days, string='Leaves Already Taken', help='This value is given by the sum of all holidays requests with a negative value.', multi='user_left_days'),
        'remaining_leaves': fields.function(_user_left_days, string='Remaining Leaves', help='Maximum Leaves Allowed - Leaves Already Taken', multi='user_left_days'),
        'virtual_remaining_leaves': fields.function(_user_left_days, string='Virtual Remaining Leaves', help='Maximum Leaves Allowed - Leaves Already Taken - Leaves Waiting Approval', multi='user_left_days'),
        'double_validation': fields.boolean('Apply Double Validation', help="When selected, the Allocation/Leave Requests for this type require a second validation to be approved."),
    }
    _defaults = {
        'color_name': 'red',
        'active': True,
    }
    def name_get(self, cr, uid, ids, context=None):
        if context is None:
            context = {}
        if not context.get('employee_id',False):
            # leave counts is based on employee_id, would be inaccurate if not based on correct employee
            return super(hr_holidays_status, self).name_get(cr, uid, ids, context=context)
        res = []
        for record in self.browse(cr, uid, ids, context=context):
            name = record.name
            if not record.limit:
                name = name + ('  (%g/%g)' % (record.leaves_taken or 0.0, record.max_leaves or 0.0))
            res.append((record.id, name))
        return res
class hr_holidays(osv.osv):
    _name = "hr.holidays"
    _description = "Leave"
    _order = "type desc, date_from asc"
    _inherit = ['mail.thread', 'ir.needaction_mixin']
    _track = {
        'state': {
            'hr_holidays.mt_holidays_approved': lambda self, cr, uid, obj, ctx=None: obj.state == 'validate',
            'hr_holidays.mt_holidays_refused': lambda self, cr, uid, obj, ctx=None: obj.state == 'refuse',
            'hr_holidays.mt_holidays_confirmed': lambda self, cr, uid, obj, ctx=None: obj.state == 'confirm',
        },
    }
    def _employee_get(self, cr, uid, context=None):        
        emp_id = context.get('default_employee_id', False)
        if emp_id:
            return emp_id
        ids = self.pool.get('hr.employee').search(cr, uid, [('user_id', '=', uid)], context=context)
        if ids:
            return ids[0]
        return False
    def _compute_number_of_days(self, cr, uid, ids, name, args, context=None):
        result = {}
        for hol in self.browse(cr, uid, ids, context=context):
            if hol.type=='remove':
                result[hol.id] = -hol.number_of_days_temp
            else:
                result[hol.id] = hol.number_of_days_temp
        return result
    def _get_can_reset(self, cr, uid, ids, name, arg, context=None):
        """User can reset a leave request if it is its own leave request or if
        he is an Hr Manager. """
        user = self.pool['res.users'].browse(cr, uid, uid, context=context)
        group_hr_manager_id = self.pool.get('ir.model.data').get_object_reference(cr, uid, 'base', 'group_hr_manager')[1]
        if group_hr_manager_id in [g.id for g in user.groups_id]:
            return dict.fromkeys(ids, True)
        result = dict.fromkeys(ids, False)
        for holiday in self.browse(cr, uid, ids, context=context):
            if holiday.employee_id and holiday.employee_id.user_id and holiday.employee_id.user_id.id == uid:
                result[holiday.id] = True
        return result
    def _check_date(self, cr, uid, ids, context=None):
        for holiday in self.browse(cr, uid, ids, context=context):
            domain = [
                ('date_from', '<=', holiday.date_to),
                ('date_to', '>=', holiday.date_from),
                ('employee_id', '=', holiday.employee_id.id),
                ('id', '!=', holiday.id),
                ('state', 'not in', ['cancel', 'refuse']),
            ]
            nholidays = self.search_count(cr, uid, domain, context=context)
            if nholidays:
                return False
        return True
    _check_holidays = lambda self, cr, uid, ids, context=None: self.check_holidays(cr, uid, ids, context=context)
    _columns = {
        'name': fields.char('Description', size=64),
        'state': fields.selection([('draft', 'To Submit'), ('cancel', 'Cancelled'),('confirm', 'To Approve'), ('refuse', 'Refused'), ('validate1', 'Second Approval'), ('validate', 'Approved')],
            'Status', readonly=True, track_visibility='onchange', copy=False,
            help='The status is set to \'To Submit\', when a holiday request is created.\
            \nThe status is \'To Approve\', when holiday request is confirmed by user.\
            \nThe status is \'Refused\', when holiday request is refused by manager.\
            \nThe status is \'Approved\', when holiday request is approved by manager.'),
        'user_id':fields.related('employee_id', 'user_id', type='many2one', relation='res.users', string='User', store=True),
        'date_from': fields.datetime('Start Date', readonly=True, states={'draft':[('readonly',False)], 'confirm':[('readonly',False)]}, select=True, copy=False),
        'date_to': fields.datetime('End Date', readonly=True, states={'draft':[('readonly',False)], 'confirm':[('readonly',False)]}, copy=False),
        'holiday_status_id': fields.many2one("hr.holidays.status", "Leave Type", required=True,readonly=True, states={'draft':[('readonly',False)], 'confirm':[('readonly',False)]}),
        'employee_id': fields.many2one('hr.employee', "Employee", select=True, invisible=False, readonly=True, states={'draft':[('readonly',False)], 'confirm':[('readonly',False)]}),
        'manager_id': fields.many2one('hr.employee', 'First Approval', invisible=False, readonly=True, copy=False,
                                      help='This area is automatically filled by the user who validate the leave'),
        'notes': fields.text('Reasons',readonly=True, states={'draft':[('readonly',False)], 'confirm':[('readonly',False)]}),
        'number_of_days_temp': fields.float('Allocation', readonly=True, states={'draft':[('readonly',False)], 'confirm':[('readonly',False)]}, copy=False),
        'number_of_days': fields.function(_compute_number_of_days, string='Number of Days', store=True),
        'meeting_id': fields.many2one('calendar.event', 'Meeting'),
        'type': fields.selection([('remove','Leave Request'),('add','Allocation Request')], 'Request Type', required=True, readonly=True, states={'draft':[('readonly',False)], 'confirm':[('readonly',False)]}, help="Choose 'Leave Request' if someone wants to take an off-day. \nChoose 'Allocation Request' if you want to increase the number of leaves available for someone", select=True),
        'parent_id': fields.many2one('hr.holidays', 'Parent'),
        'linked_request_ids': fields.one2many('hr.holidays', 'parent_id', 'Linked Requests',),
        'department_id':fields.related('employee_id', 'department_id', string='Department', type='many2one', relation='hr.department', readonly=True, store=True),
        'category_id': fields.many2one('hr.employee.category', "Employee Tag", help='Category of Employee', readonly=True, states={'draft':[('readonly',False)], 'confirm':[('readonly',False)]}),
        'holiday_type': fields.selection([('employee','By Employee'),('category','By Employee Tag')], 'Allocation Mode', readonly=True, states={'draft':[('readonly',False)], 'confirm':[('readonly',False)]}, help='By Employee: Allocation/Request for individual Employee, By Employee Tag: Allocation/Request for group of employees in category', required=True),
        'manager_id2': fields.many2one('hr.employee', 'Second Approval', readonly=True, copy=False,
                                       help='This area is automaticly filled by the user who validate the leave with second level (If Leave type need second validation)'),
        'double_validation': fields.related('holiday_status_id', 'double_validation', type='boolean', relation='hr.holidays.status', string='Apply Double Validation'),
        'can_reset': fields.function(
            _get_can_reset,
            type='boolean'),
    }
    _defaults = {
        'employee_id': _employee_get,
        'state': 'confirm',
        'type': 'remove',
        'user_id': lambda obj, cr, uid, context: uid,
        'holiday_type': 'employee'
    }
    _constraints = [
        (_check_date, 'You can not have 2 leaves that overlaps on same day!', ['date_from','date_to']),
        (_check_holidays, 'The number of remaining leaves is not sufficient for this leave type', ['state','number_of_days_temp'])
    ] 
    
    _sql_constraints = [
        ('type_value', "CHECK( (holiday_type='employee' AND employee_id IS NOT NULL) or (holiday_type='category' AND category_id IS NOT NULL))", 
         "The employee or employee category of this request is missing. Please make sure that your user login is linked to an employee."),
        ('date_check2', "CHECK ( (type='add') OR (date_from <= date_to))", "The start date must be anterior to the end date."),
        ('date_check', "CHECK ( number_of_days_temp >= 0 )", "The number of days must be greater than 0."),
    ]
    def _create_resource_leave(self, cr, uid, leaves, context=None):
        '''This method will create entry in resource calendar leave object at the time of holidays validated '''
        obj_res_leave = self.pool.get('resource.calendar.leaves')
        for leave in leaves:
            vals = {
                'name': leave.name,
                'date_from': leave.date_from,
                'holiday_id': leave.id,
                'date_to': leave.date_to,
                'resource_id': leave.employee_id.resource_id.id,
                'calendar_id': leave.employee_id.resource_id.calendar_id.id
            }
            obj_res_leave.create(cr, uid, vals, context=context)
        return True
    def _remove_resource_leave(self, cr, uid, ids, context=None):
        '''This method will create entry in resource calendar leave object at the time of holidays cancel/removed'''
        obj_res_leave = self.pool.get('resource.calendar.leaves')
        leave_ids = obj_res_leave.search(cr, uid, [('holiday_id', 'in', ids)], context=context)
        return obj_res_leave.unlink(cr, uid, leave_ids, context=context)
    def onchange_type(self, cr, uid, ids, holiday_type, employee_id=False, context=None):
        result = {}
        if holiday_type == 'employee' and not employee_id:
            ids_employee = self.pool.get('hr.employee').search(cr, uid, [('user_id','=', uid)])
            if ids_employee:
                result['value'] = {
                    'employee_id': ids_employee[0]
                }
        elif holiday_type != 'employee':
            result['value'] = {
                    'employee_id': False
                }
        return result
    def onchange_employee(self, cr, uid, ids, employee_id):
        result = {'value': {'department_id': False}}
        if employee_id:
            employee = self.pool.get('hr.employee').browse(cr, uid, employee_id)
            result['value'] = {'department_id': employee.department_id.id}
        return result
    # TODO: can be improved using resource calendar method
    def _get_number_of_days(self, date_from, date_to):
        """Returns a float equals to the timedelta between two dates given as string."""
        DATETIME_FORMAT = "%Y-%m-%d %H:%M:%S"
        from_dt = datetime.datetime.strptime(date_from, DATETIME_FORMAT)
        to_dt = datetime.datetime.strptime(date_to, DATETIME_FORMAT)
        timedelta = to_dt - from_dt
        diff_day = timedelta.days + float(timedelta.seconds) / 86400
        return diff_day
    def unlink(self, cr, uid, ids, context=None):
        for rec in self.browse(cr, uid, ids, context=context):
            if rec.state not in ['draft', 'cancel', 'confirm']:
                raise osv.except_osv(_('Warning!'),_('You cannot delete a leave which is in %s state.')%(rec.state))
        return super(hr_holidays, self).unlink(cr, uid, ids, context)
    def onchange_date_from(self, cr, uid, ids, date_to, date_from):
        """
        If there are no date set for date_to, automatically set one 8 hours later than
        the date_from.
        Also update the number_of_days.
        """
        # date_to has to be greater than date_from
        if (date_from and date_to) and (date_from > date_to):
            raise osv.except_osv(_('Warning!'),_('The start date must be anterior to the end date.'))
        result = {'value': {}}
        # No date_to set so far: automatically compute one 8 hours later
        if date_from and not date_to:
            date_to_with_delta = datetime.datetime.strptime(date_from, tools.DEFAULT_SERVER_DATETIME_FORMAT) + datetime.timedelta(hours=8)
            result['value']['date_to'] = str(date_to_with_delta)
        # Compute and update the number of days
        if (date_to and date_from) and (date_from <= date_to):
            diff_day = self._get_number_of_days(date_from, date_to)
            result['value']['number_of_days_temp'] = round(math.floor(diff_day))+1
        else:
            result['value']['number_of_days_temp'] = 0
        return result
    def onchange_date_to(self, cr, uid, ids, date_to, date_from):
        """
        Update the number_of_days.
        """
        # date_to has to be greater than date_from
        if (date_from and date_to) and (date_from > date_to):
            raise osv.except_osv(_('Warning!'),_('The start date must be anterior to the end date.'))
        result = {'value': {}}
        # Compute and update the number of days
        if (date_to and date_from) and (date_from <= date_to):
            diff_day = self._get_number_of_days(date_from, date_to)
            result['value']['number_of_days_temp'] = round(math.floor(diff_day))+1
        else:
            result['value']['number_of_days_temp'] = 0
        return result
    def add_follower(self, cr, uid, ids, employee_id, context=None):
        employee = self.pool['hr.employee'].browse(cr, uid, employee_id, context=context)
        if employee.user_id:
            self.message_subscribe(cr, uid, ids, [employee.user_id.partner_id.id], context=context)
    def create(self, cr, uid, values, context=None):
        """ Override to avoid automatic logging of creation """
        if context is None:
            context = {}
        employee_id = values.get('employee_id', False)
        context = dict(context, mail_create_nolog=True, mail_create_nosubscribe=True)
        if values.get('state') and values['state'] not in ['draft', 'confirm', 'cancel'] and not self.pool['res.users'].has_group(cr, uid, 'base.group_hr_user'):
            raise osv.except_osv(_('Warning!'), _('You cannot set a leave request as \'%s\'. Contact a human resource manager.') % values.get('state'))
        hr_holiday_id = super(hr_holidays, self).create(cr, uid, values, context=context)
        self.add_follower(cr, uid, [hr_holiday_id], employee_id, context=context)
        return hr_holiday_id
    def write(self, cr, uid, ids, vals, context=None):
        employee_id = vals.get('employee_id', False)
        if vals.get('state') and vals['state'] not in ['draft', 'confirm', 'cancel'] and not self.pool['res.users'].has_group(cr, uid, 'base.group_hr_user'):
            raise osv.except_osv(_('Warning!'), _('You cannot set a leave request as \'%s\'. Contact a human resource manager.') % vals.get('state'))
        hr_holiday_id = super(hr_holidays, self).write(cr, uid, ids, vals, context=context)
        self.add_follower(cr, uid, ids, employee_id, context=context)
        return hr_holiday_id
    def holidays_reset(self, cr, uid, ids, context=None):
        self.write(cr, uid, ids, {
            'state': 'draft',
            'manager_id': False,
            'manager_id2': False,
        })
        to_unlink = []
        for record in self.browse(cr, uid, ids, context=context):
            for record2 in record.linked_request_ids:
                self.holidays_reset(cr, uid, [record2.id], context=context)
                to_unlink.append(record2.id)
        if to_unlink:
            self.unlink(cr, uid, to_unlink, context=context)
        return True
    def holidays_first_validate(self, cr, uid, ids, context=None):
        obj_emp = self.pool.get('hr.employee')
        ids2 = obj_emp.search(cr, uid, [('user_id', '=', uid)])
        manager = ids2 and ids2[0] or False
        self.holidays_first_validate_notificate(cr, uid, ids, context=context)
        return self.write(cr, uid, ids, {'state':'validate1', 'manager_id': manager})
    def holidays_validate(self, cr, uid, ids, context=None):


Answer:         obj_emp = self.pool.get('hr.employee')