from odoo import api, fields, models


class McStudent(models.Model):
    _name = "mc.student"
    _inherit = ["mail.thread"]
    _description = "Student"
    _order = "name"
    _rec_name = "name"

    partner_id = fields.Many2one(
        "res.partner", string="Contact", required=True, ondelete="restrict",
    )
    admission_no = fields.Char(string="Admission No.", copy=False, tracking=True)
    name = fields.Char(string="Name", required=True, tracking=True)
    dob = fields.Date(string="Date of Birth")
    gender = fields.Selection(
        [("male", "Male"), ("female", "Female"), ("other", "Other")],
        string="Gender",
    )
    admission_date = fields.Date(string="Admission Date", default=fields.Date.context_today)
    photo = fields.Binary(string="Photo", attachment=True)
    status = fields.Selection(
        [
            ("active", "Active"),
            ("inactive", "Inactive"),
            ("alumni", "Alumni"),
            ("withdrawn", "Withdrawn"),
        ],
        string="Status", default="active", required=True, tracking=True,
    )
    blood_group = fields.Selection(
        [
            ("a+", "A+"), ("a-", "A-"),
            ("b+", "B+"), ("b-", "B-"),
            ("ab+", "AB+"), ("ab-", "AB-"),
            ("o+", "O+"), ("o-", "O-"),
        ],
        string="Blood Group",
    )
    address_id = fields.Many2one(
        "res.partner", string="Address",
        help="A specific address contact for this student, if different from the guardian's.",
    )
    guardian_link_ids = fields.One2many(
        "mc.student.guardian", "student_id", string="Guardians",
    )
    enrollment_ids = fields.One2many("mc.enrollment", "student_id", string="Enrollments")

    _partner_uniq = models.Constraint(
        "unique(partner_id)",
        "This contact already has a student record.",
    )
    _admission_no_uniq = models.Constraint(
        "unique(admission_no)",
        "A student with this admission number already exists.",
    )

    @api.model_create_multi
    def create(self, vals_list):
        for vals in vals_list:
            if not vals.get("admission_no"):
                vals["admission_no"] = self.env["ir.sequence"].next_by_code(
                    "mc.student.admission_no"
                )
        return super().create(vals_list)