"""Performance benchmarks tagged 'benchmark'."""

import json
import statistics
import time
from datetime import date

from odoo.tests.common import HttpCase, TransactionCase, new_test_user
from odoo.tests import tagged


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

    def setUp(self):
        super().setUp()
        self.engine = self.env['fusion.asset.engine']

    def _percentile(self, samples, p):
        if len(samples) <= 1:
            return samples[0] if samples else 0
        sorted_s = sorted(samples)
        idx = int(len(sorted_s) * p / 100)
        return sorted_s[min(idx, len(sorted_s) - 1)]

    def test_compute_schedule_p95(self):
        timings = []
        for i in range(10):
            asset = self.env['fusion.asset'].create({
                'name': f'PerfAsset{i}', 'cost': 100000, 'salvage_value': 5000,
                'acquisition_date': date(2026, 1, 1),
                'method': 'straight_line', 'useful_life_years': 10,
            })
            start = time.perf_counter()
            self.engine.compute_depreciation_schedule(asset)
            timings.append((time.perf_counter() - start) * 1000)
        p95 = self._percentile(timings, 95)
        median = statistics.median(timings)
        msg = f"compute_schedule(10yr): median={median:.0f}ms p95={p95:.0f}ms"
        print(f"\n  PERF: {msg} (target <500ms)")
        self.assertLess(p95, 5000, f"way over budget: {msg}")

    def test_post_depreciation_p95(self):
        asset = self.env['fusion.asset'].create({
            'name': 'PostPerf', 'cost': 50000,
            'acquisition_date': date(2026, 1, 1),
            'in_service_date': date(2026, 1, 1),
            'method': 'straight_line', 'useful_life_years': 10,
        })
        self.engine.compute_depreciation_schedule(asset)
        asset.action_set_running()
        timings = []
        for _ in range(5):
            start = time.perf_counter()
            self.engine.post_depreciation_entry(asset)
            timings.append((time.perf_counter() - start) * 1000)
        p95 = self._percentile(timings, 95)
        median = statistics.median(timings)
        msg = f"post_depreciation: median={median:.0f}ms p95={p95:.0f}ms"
        print(f"\n  PERF: {msg} (target <300ms)")
        self.assertLess(p95, 3000)

    def test_dispose_asset_p95(self):
        timings = []
        for i in range(5):
            asset = self.env['fusion.asset'].create({
                'name': f'DispPerf{i}', 'cost': 10000,
                'acquisition_date': date(2026, 1, 1),
                'in_service_date': date(2026, 1, 1),
                'method': 'straight_line', 'useful_life_years': 5,
            })
            self.engine.compute_depreciation_schedule(asset)
            asset.action_set_running()
            start = time.perf_counter()
            self.engine.dispose_asset(asset, sale_amount=5000)
            timings.append((time.perf_counter() - start) * 1000)
        p95 = self._percentile(timings, 95)
        median = statistics.median(timings)
        msg = f"dispose_asset: median={median:.0f}ms p95={p95:.0f}ms"
        print(f"\n  PERF: {msg} (target <300ms)")
        self.assertLess(p95, 3000)


@tagged('post_install', '-at_install', 'benchmark')
class TestControllerBenchmarks(HttpCase):

    def test_list_endpoint_p95(self):
        new_test_user(
            self.env, login='asset_perf',
            groups='base.group_user,account.group_account_invoice',
        )
        for i in range(20):
            self.env['fusion.asset'].create({
                'name': f'ListPerf{i}', 'cost': 1000,
                'acquisition_date': date(2026, 1, 1),
                'method': 'straight_line', 'useful_life_years': 4,
            })
        self.authenticate('asset_perf', 'asset_perf')
        timings = []
        for _ in range(5):
            start = time.perf_counter()
            response = self.url_open(
                '/fusion/assets/list',
                data=json.dumps({
                    'jsonrpc': '2.0', 'method': 'call', 'id': 1,
                    'params': {'company_id': self.env.company.id},
                }),
                headers={'Content-Type': 'application/json'},
            )
            timings.append((time.perf_counter() - start) * 1000)
            self.assertEqual(response.status_code, 200)
        sorted_t = sorted(timings)
        p95 = sorted_t[min(int(len(sorted_t) * 0.95), len(sorted_t) - 1)]
        median = statistics.median(timings)
        msg = f"controller.list: median={median:.0f}ms p95={p95:.0f}ms"
        print(f"\n  PERF: {msg} (target <300ms)")
        self.assertLess(p95, 3000)