from odoo.exceptions import ValidationError
from odoo.tests.common import TransactionCase

# Names are deliberately distinct from demo data (see ../demo/) - these
# tests must pass whether or not demo data is loaded.


class TestFeeStructure(TransactionCase):

    @classmethod
    def setUpClass(cls):
        super().setUpClass()
        cls.year = cls.env["mc.academic.year"].create({
            "name": "TEST-FEES-2026-27",
            "date_start": "2026-06-01",
            "date_end": "2027-04-30",
        })
        cls.term1 = cls.env["mc.academic.term"].create({
            "name": "TEST Term 1", "year_id": cls.year.id,
            "date_start": "2026-06-01", "date_end": "2026-09-30",
        })
        cls.term2 = cls.env["mc.academic.term"].create({
            "name": "TEST Term 2", "year_id": cls.year.id,
            "date_start": "2026-10-01", "date_end": "2026-12-31",
        })
        cls.program = cls.env["mc.program"].create({
            "name": "TEST Program", "code": "TEST-FEES-P1", "sequence_no": 1,
            "display_label": "Test Grade",
        })
        cls.category_tuition = cls.env["mc.fee.category"].create({"name": "TEST Tuition"})
        cls.category_lab = cls.env["mc.fee.category"].create({"name": "TEST Lab"})

    def test_total_amount_computed_from_lines(self):
        structure = self.env["mc.fee.structure"].create({
            "program_id": self.program.id,
            "year_id": self.year.id,
            "line_ids": [
                (0, 0, {"category_id": self.category_tuition.id, "amount": 40000}),
                (0, 0, {"category_id": self.category_lab.id, "amount": 5000}),
            ],
        })
        self.assertEqual(structure.total_amount, 45000)

    def test_duplicate_structure_for_same_program_year_rejected(self):
        self.env["mc.fee.structure"].create({
            "program_id": self.program.id, "year_id": self.year.id,
        })
        with self.assertRaises(Exception):
            with self.cr.savepoint():
                self.env["mc.fee.structure"].create({
                    "program_id": self.program.id, "year_id": self.year.id,
                })

    def test_schedule_can_be_built_up_incrementally(self):
        # Adding one term at a time is the normal workflow, and the total
        # is under 100% after every step but the last - must not raise.
        structure = self.env["mc.fee.structure"].create({
            "program_id": self.program.id, "year_id": self.year.id,
        })
        schedule = self.env["mc.fee.schedule"].create({"structure_id": structure.id})
        self.env["mc.fee.schedule.line"].create({
            "schedule_id": schedule.id, "term_id": self.term1.id,
            "due_date": "2026-06-15", "percentage": 40,
        })
        self.assertEqual(schedule.total_percentage, 40)
        self.env["mc.fee.schedule.line"].create({
            "schedule_id": schedule.id, "term_id": self.term2.id,
            "due_date": "2026-10-15", "percentage": 60,
        })
        self.assertEqual(schedule.total_percentage, 100)

    def test_schedule_over_100_percent_rejected(self):
        structure = self.env["mc.fee.structure"].create({
            "program_id": self.program.id, "year_id": self.year.id,
        })
        schedule = self.env["mc.fee.schedule"].create({"structure_id": structure.id})
        self.env["mc.fee.schedule.line"].create({
            "schedule_id": schedule.id, "term_id": self.term1.id,
            "due_date": "2026-06-15", "percentage": 70,
        })
        with self.assertRaises(ValidationError):
            self.env["mc.fee.schedule.line"].create({
                "schedule_id": schedule.id, "term_id": self.term2.id,
                "due_date": "2026-10-15", "percentage": 40,
            })