# -*- coding: utf-8 -*-
from odoo.tests.common import TransactionCase, tagged


@tagged('post_install', '-at_install')
class TestUsageIngestion(TransactionCase):

    def setUp(self):
        super().setUp()
        self.metric = self.env['fusion.billing.metric'].sudo().create(
            {'name': 'CPU seconds', 'code': 'cpu_seconds', 'aggregation': 'sum'})
        self.plan = self.env['sale.subscription.plan'].sudo().create(
            {'name': 'Monthly', 'billing_period_value': 1, 'billing_period_unit': 'month'})
        self.partner = self.env['res.partner'].sudo().create({'name': 'Acme'})
        self.sub = self.env['sale.order'].sudo().create({
            'partner_id': self.partner.id, 'is_subscription': True, 'plan_id': self.plan.id,
        })
        self.Usage = self.env['fusion.billing.usage'].sudo()

    def test_record_usage_creates_row(self):
        u = self.Usage._record_usage(
            self.sub, 'cpu_seconds', 120.0,
            '2026-05-01 00:00:00', '2026-06-01 00:00:00', idem='nexacloud:cpu:sub1:2026-05-01')
        self.assertEqual(u.quantity, 120.0)
        self.assertEqual(u.metric_id, self.metric)

    def test_idempotent_key_updates_not_duplicates(self):
        k = 'nexacloud:cpu:sub1:2026-05-01'
        self.Usage._record_usage(self.sub, 'cpu_seconds', 100.0, '2026-05-01', '2026-06-01', idem=k)
        self.Usage._record_usage(self.sub, 'cpu_seconds', 175.0, '2026-05-01', '2026-06-01', idem=k)
        rows = self.Usage.search([('idempotency_key', '=', k)])
        self.assertEqual(len(rows), 1)        # no duplicate
        self.assertEqual(rows.quantity, 175.0)  # last value wins for the same key

    def test_aggregate_sum(self):
        for i, q in enumerate([10.0, 20.0, 30.0]):
            self.Usage._record_usage(self.sub, 'cpu_seconds', q,
                                     '2026-05-01', '2026-06-01', idem='cpu-%d' % i)
        total = self.Usage._aggregate(self.sub, self.metric, '2026-05-01', '2026-06-01')
        self.assertEqual(total, 60.0)

    def test_aggregate_max(self):
        self.metric.aggregation = 'max'
        for i, q in enumerate([10.0, 55.0, 30.0]):
            self.Usage._record_usage(self.sub, 'cpu_seconds', q,
                                     '2026-05-01', '2026-06-01', idem='m-%d' % i)
        self.assertEqual(self.Usage._aggregate(self.sub, self.metric, '2026-05-01', '2026-06-01'), 55.0)

    def test_aggregate_excludes_other_periods(self):
        self.Usage._record_usage(self.sub, 'cpu_seconds', 99.0, '2026-04-01', '2026-05-01', idem='apr')
        self.Usage._record_usage(self.sub, 'cpu_seconds', 5.0, '2026-05-01', '2026-06-01', idem='may')
        self.assertEqual(self.Usage._aggregate(self.sub, self.metric, '2026-05-01', '2026-06-01'), 5.0)

    def test_rate_open_period_creates_overage_line(self):
        product = self.env['product.product'].sudo().create(
            {'name': 'API overage', 'type': 'service', 'list_price': 0.0})
        charge = self.env['fusion.billing.charge'].sudo().create({
            'name': 'overage', 'plan_code': 'p', 'metric_id': self.metric.id,
            'product_id': product.id, 'included_quota': 100.0,
            'price_per_unit': 0.10, 'unit_batch': 1000.0, 'charge_model': 'standard'})
        self.Usage._record_usage(self.sub, 'cpu_seconds', 1100.0,
                                 '2026-05-01', '2026-06-01', idem='r1')
        amount = self.sub._fc_rate_usage(charge, '2026-05-01', '2026-06-01')
        # 1100 - 100 = 1000 overage = 1 batch * $0.10 = $0.10
        self.assertAlmostEqual(amount, 0.10, places=2)
        line = self.sub.order_line.filtered(lambda l: l.product_id == product)
        self.assertTrue(line)