from odoo import fields, models


class McStudent(models.Model):
    _inherit = "mc.student"

    def _get_report_card_term(self):
        """The term a report card prints for: the most recent term this
        student actually has marks in, or - nothing graded yet - whichever
        term's date range covers today. Marks win over the calendar
        deliberately: a report card is generated to show a term's *results*,
        typically reviewed after that term's exams are done and marks
        entered (which is often during the *next* term, not the graded
        term itself) - resolving strictly by today's date would show an
        empty current term instead of the graded one. Lets "Print Report
        Card" work with no extra picker on the common path, per Demo
        Scene 6 ("As Principal, generate Aditya's report card" - one
        click, no term-selection wizard).
        """
        self.ensure_one()
        enrollment = self._get_report_card_enrollment()
        if not enrollment:
            return self.env["mc.academic.term"]
        marks = self.env["mc.mark"].search([("student_id", "=", self.id)])
        terms_with_marks = marks.exam_id.term_id.filtered(
            lambda t: t.year_id == enrollment.year_id
        )
        if terms_with_marks:
            return terms_with_marks.sorted("date_start", reverse=True)[:1]
        today = fields.Date.context_today(self)
        return self.env["mc.academic.term"].search([
            ("year_id", "=", enrollment.year_id.id),
            ("date_start", "<=", today), ("date_end", ">=", today),
        ], limit=1)

    def _get_report_card_enrollment(self):
        self.ensure_one()
        return self.env["mc.enrollment"].search([
            ("student_id", "=", self.id), ("state", "=", "active"),
        ], limit=1)

    def _get_report_card_marks(self, term):
        self.ensure_one()
        return self.env["mc.mark"].search([
            ("student_id", "=", self.id), ("exam_id.term_id", "=", term.id),
        ])

    def _get_report_card_attendance_summary(self, term):
        """Attendance summary is optional: mc_education_exam does not
        depend on mc_education_attendance (each mc_education_* module
        installs independently, CLAUDE.md sec 1.4), so this degrades to
        None rather than failing when attendance isn't installed.
        """
        self.ensure_one()
        try:
            attendance_model = self.env["mc.attendance"]
        except KeyError:
            return None
        records = attendance_model.search([
            ("student_id", "=", self.id),
            ("date", ">=", term.date_start), ("date", "<=", term.date_end),
        ])
        total = len(records)
        present = len(records.filtered(lambda a: a.state in ("present", "late")))
        return {
            "total": total,
            "present": present,
            "percentage": (present / total * 100) if total else 0.0,
        }