# -*- coding: utf-8 -*-
##############################################################################
#
#    OpenERP, Open Source Management Solution
#    Copyright (C) 2004-2010 Tiny SPRL (<http://tiny.be>).
#
#    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/>.
#
##############################################################################

from openerp import models, fields
from openerp import tools


class report_event_registration(models.Model):
    """Events Analysis"""
    _name = "report.event.registration"
    _order = 'event_date desc'
    _auto = False

    event_date = fields.Datetime('Event Date', readonly=True)
    event_id = fields.Many2one('event.event', 'Event', required=True)
    draft_state = fields.Integer(' # No of Draft Registrations')
    confirm_state = fields.Integer(' # No of Confirmed Registrations')
    seats_max = fields.Integer('Max Seats')
    nbevent = fields.Integer('Number of Events')
    nbregistration = fields.Integer('Number of Registrations')
    event_type = fields.Many2one('event.type', 'Event Type')
    registration_state = fields.Selection([('draft', 'Draft'), ('confirm', 'Confirmed'), ('done', 'Attended'), ('cancel', 'Cancelled')], 'Registration State', readonly=True, required=True)
    event_state = fields.Selection([('draft', 'Draft'), ('confirm', 'Confirmed'), ('done', 'Done'), ('cancel', 'Cancelled')], 'Event State', readonly=True, required=True)
    user_id = fields.Many2one('res.users', 'Event Responsible', readonly=True)
    user_id_registration = fields.Many2one('res.users', 'Register', readonly=True)
    name_registration = fields.Char('Participant / Contact Name', readonly=True)
    company_id = fields.Many2one('res.company', 'Company', readonly=True)

    def init(self, cr):
        """Initialize the sql view for the event registration """
        tools.drop_view_if_exists(cr, 'report_event_registration')

        # TOFIX this request won't select events that have no registration
        cr.execute(""" CREATE VIEW report_event_registration AS (
            SELECT
                e.id::varchar || '/' || coalesce(r.id::varchar,'') AS id,
                e.id AS event_id,
                e.user_id AS user_id,
                r.user_id AS user_id_registration,
                r.name AS name_registration,
                e.company_id AS company_id,
                e.date_begin AS event_date,
                count(r.id) AS nbevent,
                sum(r.nb_register) AS nbregistration,
                CASE WHEN r.state IN ('draft') THEN r.nb_register ELSE 0 END AS draft_state,
                CASE WHEN r.state IN ('open','done') THEN r.nb_register ELSE 0 END AS confirm_state,
                e.type AS event_type,
                e.seats_max AS seats_max,
                e.state AS event_state,
                r.state AS registration_state
            FROM
                event_event e
                LEFT JOIN event_registration r ON (e.id=r.event_id)

            GROUP BY
                event_id,
                user_id_registration,
                r.id,
                registration_state,
                r.nb_register,
                event_type,
                e.id,
                e.date_begin,
                e.user_id,
                event_state,
                e.company_id,
                e.seats_max,
                name_registration
        )
        """)

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