from odoo import fields, models


class McTeacher(models.Model):
    _name = "mc.teacher"
    _description = "Teacher"
    _order = "name"
    _rec_name = "name"

    employee_id = fields.Many2one(
        "hr.employee", string="Employee", required=True, ondelete="cascade",
        help="A teacher is an employee. This record only carries academic attributes.",
    )
    name = fields.Char(related="employee_id.name", string="Name", store=True, readonly=True)
    subject_ids = fields.Many2many("mc.subject", string="Subjects Qualified to Teach")
    max_weekly_periods = fields.Integer(string="Max Weekly Periods", default=30)

    _employee_uniq = models.Constraint(
        "unique(employee_id)",
        "This employee already has a teacher record.",
    )