<?php

declare(strict_types=1);

use Tests\Support\TestLaneTrendFixtures;

function classifiedTrendReport(string $laneId, string $suffix, array $seededHistory, float $currentSeconds): array
{
    $artifactDirectory = TestLaneTrendFixtures::artifactDirectory('trend-classification/'.$suffix);
    $durationsByFile = [
        'tests/Feature/Guards/TestLaneTrendClassificationTest.php' => 10.0,
        'tests/Feature/Guards/TestLaneTrendSummaryContractTest.php' => 8.0,
    ];
    $workflowId = $laneId === 'confidence' ? 'main-confidence' : 'pr-fast-feedback';
    $triggerClass = $laneId === 'confidence' ? 'mainline-push' : 'pull-request';
    $comparisonProfile = in_array($laneId, ['fast-feedback', 'confidence'], true)
        ? 'shared-test-fixture-slimming'
        : null;
    $baseReport = TestLaneTrendFixtures::buildReport(
        laneId: $laneId,
        wallClockSeconds: $seededHistory[0],
        durationsByFile: $durationsByFile,
        artifactDirectory: $artifactDirectory,
        ciContext: [
            'workflowId' => $workflowId,
            'triggerClass' => $triggerClass,
            'entryPointResolved' => true,
            'workflowLaneMatched' => true,
        ],
        comparisonProfile: $comparisonProfile,
    );

    $artifact = $baseReport['trendHistoryArtifact'];
    $templateRecord = $artifact['history'][0];
    $artifact['history'] = array_values(array_map(
        static function (float $seconds, int $index) use ($templateRecord): array {
            $record = $templateRecord;
            $record['runRef'] = sprintf('%s-history-%d', $templateRecord['laneId'], $index + 1);
            $record['generatedAt'] = sprintf('2026-04-%02dT09:00:00+00:00', $index + 1);
            $record['wallClockSeconds'] = round($seconds, 6);

            return $record;
        },
        $seededHistory,
        array_keys($seededHistory),
    ));

    TestLaneTrendFixtures::writeTrendHistory($laneId, $artifact, $artifactDirectory);

    return TestLaneTrendFixtures::buildReport(
        laneId: $laneId,
        wallClockSeconds: $currentSeconds,
        durationsByFile: $durationsByFile,
        artifactDirectory: $artifactDirectory,
        ciContext: [
            'workflowId' => $workflowId,
            'triggerClass' => $triggerClass,
            'entryPointResolved' => true,
            'workflowLaneMatched' => true,
        ],
        comparisonProfile: $comparisonProfile,
    );
}

it('classifies healthy, budget-near, trending-worse, regressed, and unstable runtime states', function (): void {
    $healthy = classifiedTrendReport('fast-feedback', 'healthy', [176.1, 175.6, 176.2, 175.4, 176.0], 176.4);
    $budgetNear = classifiedTrendReport('confidence', 'budget-near', [433.0, 430.0, 427.0, 424.0, 420.0], 438.5);
    $trendingWorse = classifiedTrendReport('fast-feedback', 'trending-worse', [175.0, 150.0, 125.0, 100.0, 75.0], 195.0);
    $regressed = classifiedTrendReport('fast-feedback', 'regressed', [200.0, 180.0, 160.0, 140.0, 120.0], 225.0);
    $unstable = classifiedTrendReport('fast-feedback', 'unstable', [170.0, 195.0, 168.0, 193.0, 166.0], 194.0);

    expect($healthy['trendCurrentAssessment']['healthClass'])->toBe('healthy')
        ->and($budgetNear['trendCurrentAssessment']['healthClass'])->toBe('budget-near')
        ->and($trendingWorse['trendCurrentAssessment']['healthClass'])->toBe('trending-worse')
        ->and($regressed['trendCurrentAssessment']['healthClass'])->toBe('regressed')
        ->and($unstable['trendCurrentAssessment']['healthClass'])->toBe('unstable')
        ->and($unstable['trendCurrentAssessment']['windowStatus'])->toBe('noisy');
});