# Copyright 2019 Marcelo Frare (Ass. PNLUG - Gruppo Odoo <http://odoo.pnlug.it>)
# Copyright 2019 Stefano Consolaro (Ass. PNLUG - Gruppo Odoo <http://odoo.pnlug.it>)
# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).

from odoo import fields, models, api, _
from odoo.exceptions import ValidationError


class QcPlan(models.Model):
    """
    Manages quality control plans
    """

    # model
    _name = 'qc.plan'
    _description = 'Quality Control Plan'

    _inherit = ['mail.thread']

    # fields
    # alphanumeric identification code
    name = fields.Char('Name', required=True)
    # description of plan calculation
    description = fields.Char('Description')
    # free pass option
    free_pass = fields.Boolean('Free pass')
    # control levels of the plan
    plan_ids = fields.One2many('qc.level', 'plan_id', 'Plan')

    @api.onchange('free_pass')
    def on_change_free_pass(self):
        """
        Checks if there is only one free pass plan
        Sets the last changed to false if another one exists
        """

        if self.free_pass:
            free_p = self.env['qc.plan'].search([('free_pass', '=', True)])[0]
            if free_p:
                self.free_pass = False
                raise ValidationError(_("A free pass plan already exists: %s.")
                                      % free_p.name)

    @api.model
    def create(self, vals):
        """
        Avoids multiple free pass plans
        """
        if vals['free_pass']:
            if self.env['qc.plan'].search([('free_pass', '=', True)]):
                return False
        return super(QcPlan, self).create(vals)


class QcLevel(models.Model):
    """
    Manages the lelevs for a control plan
    """

    # model
    _name = 'qc.level'
    _description = 'Quality Control Plan Levels'

    # fields
    # plan reference
    plan_id = fields.Many2one('qc.plan', 'Plan', required=True)
    # minimum ingoing quantity
    qty_received = fields.Float('Quantity to inspect',
                                help='Minimum received quantity reference'
                                )
    # quantity value to check
    qty_checked = fields.Float(
        'Quantity checked',
        help='Quantity to check if the received goods is higher than the reference'
        )
    # chek value type: absolute or percent of ingoing quantity
    chk_type = fields.Selection([('absolute', 'Absolute value'),
                                 ('percent', 'Percent'),
                                 ],
                                'Measure',
                                default='absolute',
                                help='Indicate how to use quantity checked value'
                                )

    # defines record name to display in form view
    _rec_name = 'id'