"""Follow-up level definition (e.g. Reminder at 7 days, Warning at 30, Legal at 60)."""

from odoo import _, api, fields, models


TONE_SELECTION = [
    ('gentle', 'Gentle'),
    ('firm', 'Firm'),
    ('legal', 'Legal'),
]


class FusionFollowupLevel(models.Model):
    _name = "fusion.followup.level"
    _description = "Fusion Follow-up Level"
    _order = "sequence, id"

    name = fields.Char(required=True, translate=True)
    sequence = fields.Integer(required=True, default=10,
                              help="Order in which levels escalate (1, 2, 3...).")
    delay_days = fields.Integer(required=True,
                                help="Min days overdue to trigger this level.")
    tone = fields.Selection(TONE_SELECTION, required=True, default='gentle')
    description = fields.Text()
    company_id = fields.Many2one('res.company', default=lambda self: self.env.company)

    mail_template_id = fields.Many2one('mail.template',
                                       domain=[('model', '=', 'res.partner')])

    requires_manual_review = fields.Boolean(default=False,
        help="If True, follow-ups at this level need human approval before send.")

    active = fields.Boolean(default=True)

    _check_delay_positive = models.Constraint(
        'CHECK(delay_days >= 0)',
        'delay_days must be non-negative.',
    )
    _unique_sequence_per_company = models.Constraint(
        'UNIQUE(company_id, sequence)',
        'Sequence must be unique per company.',
    )