##############################################################################
#
# Copyright (c) 2004-2008 TINY SPRL. (http://tiny.be) All Rights Reserved.
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# $Id$
#
# WARNING: This program as such is intended to be used by professional
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# garantees and support are strongly adviced to contract a Free Software
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# This program is Free Software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
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# 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 General Public License for more details.
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# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
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##############################################################################

from mx import DateTime
import time

from osv import fields, osv
from tools.translate import _

class hr_timesheet_group(osv.osv):
    _name = "hr.timesheet.group"
    _description = "Working Time"
    _columns = {
        'name' : fields.char("Group name", size=64, required=True),
        'timesheet_id' : fields.one2many('hr.timesheet', 'tgroup_id', 'Working Time'),
        'manager' : fields.many2one('res.users', 'Workgroup manager'),
    }
    #
    # TODO: improve; very slow !
    #       bug if transition to another period
    #
    def interval_get(self, cr, uid, id, dt_from, hours, byday=True):
        if not id:
            return [(dt_from,dt_from+DateTime.RelativeDateTime(hours=int(hours)*3))]
        todo = hours
        cycle = 0
        result = []
        while todo>0:
            cr.execute('select hour_from,hour_to from hr_timesheet where dayofweek=%d and tgroup_id=%d order by hour_from', (dt_from.day_of_week,id))
            for (hour_from,hour_to) in cr.fetchall():
                h1,m1 = map(int,hour_from.split(':'))
                h2,m2 = map(int,hour_to.split(':'))
                d1 = DateTime.DateTime(dt_from.year,dt_from.month,dt_from.day,h1,m1)
                d2 = DateTime.DateTime(dt_from.year,dt_from.month,dt_from.day,h2,m2)
                if dt_from<d2:
                    date1 = max(dt_from,d1)
                    if date1+DateTime.RelativeDateTime(hours=todo)<=d2:
                        result.append((date1, date1+DateTime.RelativeDateTime(hours=todo)))
                        todo = 0
                    else:
                        todo -= (d2-date1).hours
                        result.append((date1, d2))
            dt_from = DateTime.DateTime(dt_from.year,dt_from.month,dt_from.day)+DateTime.RelativeDateTime(days=1)
            cycle+=1
            if cycle>7 and todo==hours:
                return [(dt_from,dt_from+DateTime.RelativeDateTime(hours=hours*3))]
        if byday:
            i = 1
            while i<len(result):
                if (result[i][0]-result[i-1][1]).days<1:
                    result[i-1]=(result[i-1][0],result[i][1])
                    del result[i]
                else:
                    i+=1
        return result
hr_timesheet_group()


class hr_employee_category(osv.osv):
    _name = "hr.employee.category"
    _description = "Employee Category"
    _columns = {
        'name' : fields.char("Category", size=64, required=True),
        'parent_id': fields.many2one('hr.employee.category', 'Parent category', select=True),
        'child_ids': fields.one2many('hr.employee.category', 'parent_id', 'Childs Categories')
    }
hr_employee_category()

class hr_employee(osv.osv):
    _name = "hr.employee"
    _description = "Employee"

    def _state(self, cr, uid, ids, name, args, context={}):
        result = {}
        for id in ids:
            result[id] = 'absent'
        cr.execute('SELECT hr_attendance.action, hr_attendance.employee_id \
                FROM ( \
                    SELECT MAX(name) AS name, employee_id \
                    FROM hr_attendance \
                    WHERE action in (\'sign_in\', \'sign_out\') \
                    GROUP BY employee_id \
                ) AS foo \
                LEFT JOIN hr_attendance \
                    ON (hr_attendance.employee_id = foo.employee_id \
                        AND hr_attendance.name = foo.name) \
                WHERE hr_attendance.employee_id \
                    in (' + ','.join([str(x) for x in ids]) + ')')
        for res in cr.fetchall():
            result[res[1]] = res[0] == 'sign_in' and 'present' or 'absent'
        return result

    _columns = {
        'name' : fields.char("Employee", size=128, required=True),
        'active' : fields.boolean('Active'),
        'company_id': fields.many2one('res.company', 'Company'),
        'address_id': fields.many2one('res.partner.address', 'Contact address'),
        'state': fields.function(_state, method=True, type='selection', selection=[('absent', 'Absent'), ('present', 'Present')], string='Attendance'),
        'started' : fields.date("Started on"),
        'notes': fields.text('Notes'),
        'attendances' : fields.one2many('hr.attendance', 'employee_id', "Employee's attendances"),
        'holidays' : fields.one2many('hr.holidays', 'employee_id', "Employee's holidays"),
        'workgroups' : fields.many2many('hr.timesheet.group', 'hr_timesheet_employee_rel', 'emp_id', 'tgroup_id', "Employee's work team"),
        'user_id' : fields.many2one('res.users', 'Tiny ERP User'),
        'category_id' : fields.many2one('hr.employee.category', 'Category'),
        'regime' : fields.float('Workhours by week'),
        'holiday_max' : fields.integer("Number of holidays"),
        'parent_id': fields.many2one('hr.employee', 'Boss', select=True),
        'child_ids': fields.one2many('hr.employee', 'parent_id','Subordinates'),
    }
    _defaults = {
        'active' : lambda *a: True,
        'state' : lambda *a: 'absent',
    }
    def sign_change(self, cr, uid, ids, context={}, dt=False):
        for emp in self.browse(cr, uid, ids):
            if not self._action_check(cr, uid, emp.id, dt, context):
                raise osv.except_osv(_('Warning'), _('You tried to sign with a date anterior to another event !\nTry to contact the administrator to correct attendances.'))
            res = {'action':'action', 'employee_id':emp.id}
            if dt:
                res['name'] = dt
            att_id = self.pool.get('hr.attendance').create(cr, uid, res, context=context)
        return True

    def sign_out(self, cr, uid, ids, context={}, dt=False, *args):
        id = False
        for emp in self.browse(cr, uid, ids):
            if not self._action_check(cr, uid, emp.id, dt, context):
                raise osv.except_osv(_('Warning'), _('You tried to sign out with a date anterior to another event !\nTry to contact the administrator to correct attendances.'))
            res = {'action':'sign_out', 'employee_id':emp.id}
            if dt:
                res['name'] = dt
            att_id = self.pool.get('hr.attendance').create(cr, uid, res, context=context)
            id = att_id
        return id

    def _action_check(self, cr, uid, emp_id, dt=False,context={}):
        cr.execute('select max(name) from hr_attendance where employee_id=%d', (emp_id,))
        res = cr.fetchone()
        return not (res and (res[0]>=(dt or time.strftime('%Y-%m-%d %H:%M:%S'))))

    def sign_in(self, cr, uid, ids, context={}, dt=False, *args):
        id = False
        for emp in self.browse(cr, uid, ids):
            if not self._action_check(cr, uid, emp.id, dt, context):
                raise osv.except_osv(_('Warning'), _('You tried to sign in with a date anterior to another event !\nTry to contact the administrator to correct attendances.'))
            res = {'action':'sign_in', 'employee_id':emp.id}
            if dt:
                res['name'] = dt
            id = self.pool.get('hr.attendance').create(cr, uid, res, context=context)
        return id

hr_employee()

class hr_timesheet(osv.osv):
    _name = "hr.timesheet"
    _description = "Timesheet Line"
    _columns = {
        'name' : fields.char("Name", size=64, required=True),
        'dayofweek': fields.selection([('0','Monday'),('1','Tuesday'),('2','Wednesday'),('3','Thursday'),('4','Friday'),('5','Saturday'),('6','Sunday')], 'Day of week'),
        'date_from' : fields.date('Starting date'),
        'hour_from' : fields.char('Work from', size=8, required=True),
        'hour_to' : fields.char("Work to", size=8, required=True),
        'tgroup_id' : fields.many2one("hr.timesheet.group", "Employee's timesheet group", select=True),
    }
    _order = 'dayofweek, hour_from'
hr_timesheet()

class hr_action_reason(osv.osv):
    _name = "hr.action.reason"
    _description = "Action reason"
    _columns = {
        'name' : fields.char('Reason', size=64, required=True),
        'action_type' : fields.selection([('sign_in', 'Sign in'), ('sign_out', 'Sign out')], "Action's type"),
    }
    _defaults = {
        'action_type' : lambda *a: 'sign_in',
    }
hr_action_reason()

def _employee_get(obj,cr,uid,context={}):
    ids = obj.pool.get('hr.employee').search(cr, uid, [('user_id','=', uid)])
    if ids:
        return ids[0]
    return False

class hr_attendance(osv.osv):
    _name = "hr.attendance"
    _description = "Attendance"
    _columns = {
        'name' : fields.datetime('Date', required=True),
        'action' : fields.selection([('sign_in', 'Sign In'), ('sign_out', 'Sign Out'),('action','Action')], 'Action', required=True),
        'action_desc' : fields.many2one("hr.action.reason", "Action reason", domain="[('action_type', '=', action)]"),
        'employee_id' : fields.many2one('hr.employee', 'Employee', required=True, select=True),
    }
    _defaults = {
        'name' : lambda *a: time.strftime('%Y-%m-%d %H:%M:%S'),
        'employee_id' : _employee_get,
    }
    
    def _altern_si_so(self, cr, uid, ids):
        for id in ids:
            sql = '''
            select action, name
            from hr_attendance as att
            where employee_id = (select employee_id from hr_attendance where id=%s)
            and action in ('sign_in','sign_out')
            and name <= (select name from hr_attendance where id=%s)
            order by name desc
            limit 2
            ''' % (id, id)
            cr.execute(sql)
            atts = cr.fetchall()
            if not ((len(atts)==1 and atts[0][0] == 'sign_in') or (atts[0][0] != atts[1][0] and atts[0][1] != atts[1][1])):
                return False
        return True
    
    _constraints = [(_altern_si_so, 'Error: Sign in (resp. Sign out) must follow Sign out (resp. Sign in)', ['action'])]
    _order = 'name desc'
hr_attendance()

class hr_holidays_status(osv.osv):
    _name = "hr.holidays.status"
    _description = "Holidays Status"
    _columns = {
        'name' : fields.char('Holiday Status', size=64, required=True, translate=True),
    }
hr_holidays_status()

class hr_holidays(osv.osv):
    _name = "hr.holidays"
    _description = "Holidays"
    _columns = {
        'name' : fields.char('Description', required=True, size=64),
        'date_from' : fields.datetime('Vacation start day', required=True),
        'date_to' : fields.datetime('Vacation end day'),
        'holiday_status' : fields.many2one("hr.holidays.status", "Holiday's Status"),
        'employee_id' : fields.many2one('hr.employee', 'Employee', select=True),
    }
    _defaults = {
        'employee_id' : _employee_get
    }
    _order = 'date_from desc'
hr_holidays()

# vim:tw=0:noexpandtab
