# Copyright 2018 Graeme Gellatly
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).

from dateutil.relativedelta import relativedelta
from odoo import api, fields, models


class StatementCommon(models.AbstractModel):

    _name = 'statement.common.wizard'
    _description = 'Statement Reports Common Wizard'

    name = fields.Char()
    company_id = fields.Many2one(
        comodel_name='res.company',
        default=lambda self: self.env.user.company_id,
        string='Company'
    )
    date_end = fields.Date(required=True, default=fields.Date.context_today)
    show_aging_buckets = fields.Boolean(default=True)
    number_partner_ids = fields.Integer(
        default=lambda self: len(self._context['active_ids'])
    )
    filter_partners_non_due = fields.Boolean(
        string='Don\'t show partners with no due entries', default=True)
    filter_negative_balances = fields.Boolean(
        "Exclude Negative Balances", default=True
    )

    aging_type = fields.Selection(
        [("days", "Age by Days"), ("months", "Age by Months")],
        string="Aging Method",
        default="days",
        required=True,
    )

    account_type = fields.Selection(
        [('receivable', 'Receivable'),
         ('payable', 'Payable')], string='Account type', default='receivable')

    @api.onchange('aging_type')
    def onchange_aging_type(self):
        if self.aging_type == 'months':
            self.date_end = (
                fields.Date.context_today(self).replace(day=1) -
                relativedelta(days=1)
            )
        else:
            self.date_end = fields.Date.context_today(self)

    @api.multi
    def button_export_pdf(self):
        self.ensure_one()
        return self._export()

    def _prepare_statement(self):
        self.ensure_one()
        return {
            'date_end': self.date_end,
            'company_id': self.company_id.id,
            'partner_ids': self._context['active_ids'],
            'show_aging_buckets': self.show_aging_buckets,
            'filter_non_due_partners': self.filter_partners_non_due,
            'account_type': self.account_type,
            'aging_type': self.aging_type,
            'filter_negative_balances': self.filter_negative_balances,
        }

    def _export(self):
        raise NotImplementedError