TenantAtlas/app/Jobs/CompareBaselineToTenantJob.php

<?php

declare(strict_types=1);

namespace App\Jobs;

use App\Jobs\Middleware\TrackOperationRun;
use App\Models\BaselineProfile;
use App\Models\BaselineSnapshot;
use App\Models\BaselineSnapshotItem;
use App\Models\Finding;
use App\Models\InventoryItem;
use App\Models\OperationRun;
use App\Models\Tenant;
use App\Models\User;
use App\Models\Workspace;
use App\Services\Baselines\BaselineAutoCloseService;
use App\Services\Baselines\BaselineSnapshotIdentity;
use App\Services\Baselines\CurrentStateHashResolver;
use App\Services\Baselines\Evidence\EvidenceProvenance;
use App\Services\Baselines\Evidence\MetaEvidenceProvider;
use App\Services\Baselines\Evidence\ResolvedEvidence;
use App\Services\Intune\AuditLogger;
use App\Services\OperationRunService;
use App\Services\Settings\SettingsResolver;
use App\Support\Baselines\BaselineScope;
use App\Support\Inventory\InventoryCoverage;
use App\Support\OperationRunOutcome;
use App\Support\OperationRunStatus;
use App\Support\OperationRunType;
use Carbon\CarbonImmutable;
use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\SerializesModels;
use RuntimeException;

class CompareBaselineToTenantJob implements ShouldQueue
{
    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

    public ?OperationRun $operationRun = null;

    public function __construct(
        public OperationRun $run,
    ) {
        $this->operationRun = $run;
    }

    /**
     * @return array<int, object>
     */
    public function middleware(): array
    {
        return [new TrackOperationRun];
    }

    public function handle(
        BaselineSnapshotIdentity $snapshotIdentity,
        AuditLogger $auditLogger,
        OperationRunService $operationRunService,
        ?SettingsResolver $settingsResolver = null,
        ?BaselineAutoCloseService $baselineAutoCloseService = null,
        ?CurrentStateHashResolver $hashResolver = null,
        ?MetaEvidenceProvider $metaEvidenceProvider = null,
    ): void {
        $settingsResolver ??= app(SettingsResolver::class);
        $baselineAutoCloseService ??= app(BaselineAutoCloseService::class);
        $hashResolver ??= app(CurrentStateHashResolver::class);
        $metaEvidenceProvider ??= app(MetaEvidenceProvider::class);

        if (! $this->operationRun instanceof OperationRun) {
            $this->fail(new RuntimeException('OperationRun context is required for CompareBaselineToTenantJob.'));

            return;
        }

        $context = is_array($this->operationRun->context) ? $this->operationRun->context : [];
        $profileId = (int) ($context['baseline_profile_id'] ?? 0);
        $snapshotId = (int) ($context['baseline_snapshot_id'] ?? 0);

        $profile = BaselineProfile::query()->find($profileId);

        if (! $profile instanceof BaselineProfile) {
            throw new RuntimeException("BaselineProfile #{$profileId} not found.");
        }

        $tenant = Tenant::query()->find($this->operationRun->tenant_id);

        if (! $tenant instanceof Tenant) {
            throw new RuntimeException("Tenant #{$this->operationRun->tenant_id} not found.");
        }

        $workspace = Workspace::query()->whereKey((int) $tenant->workspace_id)->first();

        if (! $workspace instanceof Workspace) {
            throw new RuntimeException("Workspace #{$tenant->workspace_id} not found.");
        }

        $initiator = $this->operationRun->user_id
            ? User::query()->find($this->operationRun->user_id)
            : null;

        $effectiveScope = BaselineScope::fromJsonb($context['effective_scope'] ?? null);
        $effectiveTypes = $effectiveScope->allTypes();
        $scopeKey = 'baseline_profile:'.$profile->getKey();

        $this->auditStarted($auditLogger, $tenant, $profile, $initiator);

        if ($effectiveTypes === []) {
            $this->completeWithCoverageWarning(
                operationRunService: $operationRunService,
                auditLogger: $auditLogger,
                tenant: $tenant,
                profile: $profile,
                initiator: $initiator,
                inventorySyncRun: null,
                coverageProof: false,
                effectiveTypes: [],
                coveredTypes: [],
                uncoveredTypes: [],
                errorsRecorded: 1,
            );

            return;
        }

        $inventorySyncRun = $this->resolveLatestInventorySyncRun($tenant);
        $coverage = $inventorySyncRun instanceof OperationRun
            ? InventoryCoverage::fromContext($inventorySyncRun->context)
            : null;

        if (! $inventorySyncRun instanceof OperationRun || ! $coverage instanceof InventoryCoverage) {
            $this->completeWithCoverageWarning(
                operationRunService: $operationRunService,
                auditLogger: $auditLogger,
                tenant: $tenant,
                profile: $profile,
                initiator: $initiator,
                inventorySyncRun: $inventorySyncRun,
                coverageProof: false,
                effectiveTypes: $effectiveTypes,
                coveredTypes: [],
                uncoveredTypes: $effectiveTypes,
                errorsRecorded: count($effectiveTypes),
            );

            return;
        }

        $coveredTypes = array_values(array_intersect($effectiveTypes, $coverage->coveredTypes()));
        $uncoveredTypes = array_values(array_diff($effectiveTypes, $coveredTypes));

        if ($coveredTypes === []) {
            $this->completeWithCoverageWarning(
                operationRunService: $operationRunService,
                auditLogger: $auditLogger,
                tenant: $tenant,
                profile: $profile,
                initiator: $initiator,
                inventorySyncRun: $inventorySyncRun,
                coverageProof: true,
                effectiveTypes: $effectiveTypes,
                coveredTypes: [],
                uncoveredTypes: $effectiveTypes,
                errorsRecorded: count($effectiveTypes),
            );

            return;
        }

        $snapshot = BaselineSnapshot::query()
            ->where('workspace_id', (int) $profile->workspace_id)
            ->where('baseline_profile_id', (int) $profile->getKey())
            ->whereKey($snapshotId)
            ->first(['id', 'captured_at']);

        if (! $snapshot instanceof BaselineSnapshot) {
            throw new RuntimeException("BaselineSnapshot #{$snapshotId} not found.");
        }

        $since = $snapshot->captured_at instanceof \DateTimeInterface
            ? CarbonImmutable::instance($snapshot->captured_at)
            : null;

        $baselineItems = $this->loadBaselineItems($snapshotId, $coveredTypes);
        $currentItems = $this->loadCurrentInventory($tenant, $coveredTypes, (int) $inventorySyncRun->getKey());

        $subjects = array_values(array_map(
            static fn (array $item): array => [
                'policy_type' => (string) $item['policy_type'],
                'subject_external_id' => (string) $item['subject_external_id'],
            ],
            $currentItems,
        ));

        $resolvedCurrentEvidence = $hashResolver->resolveForSubjects(
            tenant: $tenant,
            subjects: $subjects,
            since: $since,
            latestInventorySyncRunId: (int) $inventorySyncRun->getKey(),
        );

        $resolvedCurrentMetaEvidence = $metaEvidenceProvider->resolve(
            tenant: $tenant,
            subjects: $subjects,
            since: $since,
            latestInventorySyncRunId: (int) $inventorySyncRun->getKey(),
        );

        $resolvedEffectiveCurrentEvidence = $this->resolveEffectiveCurrentEvidence(
            baselineItems: $baselineItems,
            currentItems: $currentItems,
            resolvedBestEvidence: $resolvedCurrentEvidence,
            resolvedMetaEvidence: $resolvedCurrentMetaEvidence,
        );

        $computeResult = $this->computeDrift(
            $baselineItems,
            $currentItems,
            $resolvedEffectiveCurrentEvidence,
            $this->resolveSeverityMapping($workspace, $settingsResolver),
        );
        $driftResults = $computeResult['drift'];
        $evidenceGaps = $computeResult['evidence_gaps'];

        $upsertResult = $this->upsertFindings(
            $tenant,
            $profile,
            $snapshotId,
            $scopeKey,
            $driftResults,
        );

        $severityBreakdown = $this->countBySeverity($driftResults);
        $countsByChangeType = $this->countByChangeType($driftResults);

        $summaryCounts = [
            'total' => count($driftResults),
            'processed' => count($driftResults),
            'succeeded' => (int) $upsertResult['processed_count'],
            'failed' => 0,
            'errors_recorded' => count($uncoveredTypes),
            'high' => $severityBreakdown[Finding::SEVERITY_HIGH] ?? 0,
            'medium' => $severityBreakdown[Finding::SEVERITY_MEDIUM] ?? 0,
            'low' => $severityBreakdown[Finding::SEVERITY_LOW] ?? 0,
            'findings_created' => (int) $upsertResult['created_count'],
            'findings_reopened' => (int) $upsertResult['reopened_count'],
            'findings_unchanged' => (int) $upsertResult['unchanged_count'],
        ];

        $operationRunService->updateRun(
            $this->operationRun,
            status: OperationRunStatus::Completed->value,
            outcome: $uncoveredTypes !== [] ? OperationRunOutcome::PartiallySucceeded->value : OperationRunOutcome::Succeeded->value,
            summaryCounts: $summaryCounts,
        );

        $resolvedCount = 0;

        if ($baselineAutoCloseService->shouldAutoClose($tenant, $this->operationRun)) {
            $resolvedCount = $baselineAutoCloseService->resolveStaleFindings(
                tenant: $tenant,
                baselineProfileId: (int) $profile->getKey(),
                seenFingerprints: $upsertResult['seen_fingerprints'],
                currentOperationRunId: (int) $this->operationRun->getKey(),
            );

            $summaryCounts['findings_resolved'] = $resolvedCount;

            $operationRunService->updateRun(
                $this->operationRun,
                status: OperationRunStatus::Completed->value,
                outcome: OperationRunOutcome::Succeeded->value,
                summaryCounts: $summaryCounts,
            );
        }

        $coverageBreakdown = $this->summarizeCurrentEvidenceCoverage($currentItems, $resolvedCurrentEvidence);
        $baselineCoverage = $this->summarizeBaselineEvidenceCoverage($baselineItems);

        $overallFidelity = ($baselineCoverage['baseline_meta'] ?? 0) > 0
            || ($coverageBreakdown['resolved_meta'] ?? 0) > 0
            || ($evidenceGaps['missing_current'] ?? 0) > 0
            ? EvidenceProvenance::FidelityMeta
            : EvidenceProvenance::FidelityContent;

        $updatedContext = is_array($this->operationRun->context) ? $this->operationRun->context : [];
        $updatedContext['baseline_compare'] = array_merge(
            is_array($updatedContext['baseline_compare'] ?? null) ? $updatedContext['baseline_compare'] : [],
            [
                'inventory_sync_run_id' => (int) $inventorySyncRun->getKey(),
                'since' => $since?->toIso8601String(),
                'coverage' => [
                    'effective_types' => $effectiveTypes,
                    'covered_types' => $coveredTypes,
                    'uncovered_types' => $uncoveredTypes,
                    'proof' => true,
                    ...$coverageBreakdown,
                    ...$baselineCoverage,
                ],
                'fidelity' => $overallFidelity,
                'evidence_gaps' => $evidenceGaps,
            ],
        );
        $updatedContext['findings'] = array_merge(
            is_array($updatedContext['findings'] ?? null) ? $updatedContext['findings'] : [],
            [
                'counts_by_change_type' => $countsByChangeType,
            ],
        );
        $updatedContext['result'] = [
            'findings_total' => count($driftResults),
            'findings_upserted' => (int) $upsertResult['processed_count'],
            'findings_resolved' => $resolvedCount,
            'severity_breakdown' => $severityBreakdown,
        ];
        $this->operationRun->update(['context' => $updatedContext]);

        $this->auditCompleted($auditLogger, $tenant, $profile, $initiator, $summaryCounts);
    }

    /**
     * Baseline hashes depend on which evidence fidelity was available at capture time (content vs meta).
     *
     * Current state evidence is therefore selected to be comparable to the baseline hash:
     * - If baseline evidence fidelity is meta: force meta evidence for current (inventory meta contract).
     * - If baseline evidence fidelity is content: require current content evidence (since-rule); otherwise treat as a gap.
     *
     * @param  array<string, array{subject_type: string, subject_external_id: string, policy_type: string, baseline_hash: string, meta_jsonb: array<string, mixed>}>  $baselineItems
     * @param  array<string, array{subject_external_id: string, policy_type: string, meta_jsonb: array<string, mixed>}>  $currentItems
     * @param  array<string, ResolvedEvidence|null>  $resolvedBestEvidence
     * @param  array<string, ResolvedEvidence>  $resolvedMetaEvidence
     * @return array<string, ResolvedEvidence|null>
     */
    private function resolveEffectiveCurrentEvidence(
        array $baselineItems,
        array $currentItems,
        array $resolvedBestEvidence,
        array $resolvedMetaEvidence,
    ): array {
        /**
         * @var array<string, string>
         */
        $baselineFidelityByKey = [];

        foreach ($baselineItems as $key => $baselineItem) {
            $provenance = $this->baselineProvenanceFromMetaJsonb($baselineItem['meta_jsonb'] ?? []);
            $baselineFidelityByKey[$key] = (string) ($provenance['fidelity'] ?? EvidenceProvenance::FidelityMeta);
        }

        $effective = [];

        foreach ($currentItems as $key => $currentItem) {
            if (array_key_exists($key, $baselineItems)) {
                $baselineFidelity = $baselineFidelityByKey[$key] ?? EvidenceProvenance::FidelityMeta;

                if ($baselineFidelity === EvidenceProvenance::FidelityMeta) {
                    $effective[$key] = $resolvedMetaEvidence[$key] ?? null;

                    continue;
                }

                $best = $resolvedBestEvidence[$key] ?? null;

                if ($best instanceof ResolvedEvidence && $best->fidelity === EvidenceProvenance::FidelityContent) {
                    $effective[$key] = $best;
                } else {
                    $effective[$key] = null;
                }

                continue;
            }

            $effective[$key] = $resolvedBestEvidence[$key] ?? null;
        }

        return $effective;
    }

    private function completeWithCoverageWarning(
        OperationRunService $operationRunService,
        AuditLogger $auditLogger,
        Tenant $tenant,
        BaselineProfile $profile,
        ?User $initiator,
        ?OperationRun $inventorySyncRun,
        bool $coverageProof,
        array $effectiveTypes,
        array $coveredTypes,
        array $uncoveredTypes,
        int $errorsRecorded,
    ): void {
        $summaryCounts = [
            'total' => 0,
            'processed' => 0,
            'succeeded' => 0,
            'failed' => 0,
            'errors_recorded' => max(1, $errorsRecorded),
            'high' => 0,
            'medium' => 0,
            'low' => 0,
            'findings_created' => 0,
            'findings_reopened' => 0,
            'findings_unchanged' => 0,
        ];

        $operationRunService->updateRun(
            $this->operationRun,
            status: OperationRunStatus::Completed->value,
            outcome: OperationRunOutcome::PartiallySucceeded->value,
            summaryCounts: $summaryCounts,
        );

        $updatedContext = is_array($this->operationRun->context) ? $this->operationRun->context : [];
        $updatedContext['baseline_compare'] = array_merge(
            is_array($updatedContext['baseline_compare'] ?? null) ? $updatedContext['baseline_compare'] : [],
            [
                'inventory_sync_run_id' => $inventorySyncRun instanceof OperationRun ? (int) $inventorySyncRun->getKey() : null,
                'coverage' => [
                    'effective_types' => array_values($effectiveTypes),
                    'covered_types' => array_values($coveredTypes),
                    'uncovered_types' => array_values($uncoveredTypes),
                    'proof' => $coverageProof,
                    'subjects_total' => 0,
                    'resolved_total' => 0,
                    'resolved_content' => 0,
                    'resolved_meta' => 0,
                    'policy_types_content' => [],
                    'policy_types_meta_only' => [],
                ],
                'fidelity' => 'meta',
                'evidence_gaps' => [
                    'missing_baseline' => 0,
                    'missing_current' => 0,
                    'missing_both' => 0,
                ],
            ],
        );
        $updatedContext['findings'] = array_merge(
            is_array($updatedContext['findings'] ?? null) ? $updatedContext['findings'] : [],
            [
                'counts_by_change_type' => [],
            ],
        );
        $updatedContext['result'] = [
            'findings_total' => 0,
            'findings_upserted' => 0,
            'findings_resolved' => 0,
            'severity_breakdown' => [],
        ];

        $this->operationRun->update(['context' => $updatedContext]);

        $this->auditCompleted($auditLogger, $tenant, $profile, $initiator, $summaryCounts);
    }

    /**
     * Load baseline snapshot items keyed by "policy_type|subject_external_id".
     *
     * @return array<string, array{subject_type: string, subject_external_id: string, policy_type: string, baseline_hash: string, meta_jsonb: array<string, mixed>}>
     */
    private function loadBaselineItems(int $snapshotId, array $policyTypes): array
    {
        $items = [];

        if ($policyTypes === []) {
            return $items;
        }

        $query = BaselineSnapshotItem::query()
            ->where('baseline_snapshot_id', $snapshotId);

        $query->whereIn('policy_type', $policyTypes);

        $query
            ->orderBy('id')
            ->chunk(500, function ($snapshotItems) use (&$items): void {
                foreach ($snapshotItems as $item) {
                    $key = $item->policy_type.'|'.$item->subject_external_id;
                    $items[$key] = [
                        'subject_type' => (string) $item->subject_type,
                        'subject_external_id' => (string) $item->subject_external_id,
                        'policy_type' => (string) $item->policy_type,
                        'baseline_hash' => (string) $item->baseline_hash,
                        'meta_jsonb' => is_array($item->meta_jsonb) ? $item->meta_jsonb : [],
                    ];
                }
            });

        return $items;
    }

    /**
     * Load current inventory items keyed by "policy_type|external_id".
     *
     * @return array<string, array{subject_external_id: string, policy_type: string, meta_jsonb: array<string, mixed>}>
     */
    private function loadCurrentInventory(
        Tenant $tenant,
        array $policyTypes,
        ?int $latestInventorySyncRunId = null,
    ): array {
        $query = InventoryItem::query()
            ->where('tenant_id', $tenant->getKey());

        if (is_int($latestInventorySyncRunId) && $latestInventorySyncRunId > 0) {
            $query->where('last_seen_operation_run_id', $latestInventorySyncRunId);
        }

        if ($policyTypes === []) {
            return [];
        }

        $query->whereIn('policy_type', $policyTypes);

        $items = [];

        $query->orderBy('policy_type')
            ->orderBy('external_id')
            ->chunk(500, function ($inventoryItems) use (&$items): void {
                foreach ($inventoryItems as $inventoryItem) {
                    $key = $inventoryItem->policy_type.'|'.$inventoryItem->external_id;
                    $items[$key] = [
                        'subject_external_id' => (string) $inventoryItem->external_id,
                        'policy_type' => (string) $inventoryItem->policy_type,
                        'meta_jsonb' => [
                            'display_name' => $inventoryItem->display_name,
                            'category' => $inventoryItem->category,
                            'platform' => $inventoryItem->platform,
                        ],
                    ];
                }
            });

        return $items;
    }

    private function resolveLatestInventorySyncRun(Tenant $tenant): ?OperationRun
    {
        $run = OperationRun::query()
            ->where('tenant_id', (int) $tenant->getKey())
            ->where('type', OperationRunType::InventorySync->value)
            ->where('status', OperationRunStatus::Completed->value)
            ->orderByDesc('completed_at')
            ->orderByDesc('id')
            ->first();

        return $run instanceof OperationRun ? $run : null;
    }

    /**
     * Compare baseline items vs current inventory and produce drift results.
     *
     * @param  array<string, array{subject_type: string, subject_external_id: string, policy_type: string, baseline_hash: string, meta_jsonb: array<string, mixed>}>  $baselineItems
     * @param  array<string, array{subject_external_id: string, policy_type: string, meta_jsonb: array<string, mixed>}>  $currentItems
     * @param  array<string, ResolvedEvidence|null>  $resolvedCurrentEvidence
     * @param  array<string, string>  $severityMapping
     * @return array{drift: array<int, array{change_type: string, severity: string, evidence_fidelity: string, subject_type: string, subject_external_id: string, policy_type: string, baseline_hash: string, current_hash: string, evidence: array<string, mixed>}>, evidence_gaps: array{missing_baseline: int, missing_current: int, missing_both: int}}
     */
    private function computeDrift(array $baselineItems, array $currentItems, array $resolvedCurrentEvidence, array $severityMapping): array
    {
        $drift = [];
        $missingCurrentEvidence = 0;

        foreach ($baselineItems as $key => $baselineItem) {
            if (! array_key_exists($key, $currentItems)) {
                $drift[] = [
                    'change_type' => 'missing_policy',
                    'severity' => $this->severityForChangeType($severityMapping, 'missing_policy'),
                    'subject_type' => $baselineItem['subject_type'],
                    'subject_external_id' => $baselineItem['subject_external_id'],
                    'policy_type' => $baselineItem['policy_type'],
                    'evidence_fidelity' => EvidenceProvenance::FidelityMeta,
                    'baseline_hash' => $baselineItem['baseline_hash'],
                    'current_hash' => '',
                    'evidence' => [
                        'change_type' => 'missing_policy',
                        'policy_type' => $baselineItem['policy_type'],
                        'display_name' => $baselineItem['meta_jsonb']['display_name'] ?? null,
                    ],
                ];

                continue;
            }

            $currentEvidence = $resolvedCurrentEvidence[$key] ?? null;

            if (! $currentEvidence instanceof ResolvedEvidence) {
                $missingCurrentEvidence++;

                continue;
            }

            if ($baselineItem['baseline_hash'] !== $currentEvidence->hash) {
                $baselineProvenance = $this->baselineProvenanceFromMetaJsonb($baselineItem['meta_jsonb']);
                $baselineFidelity = (string) ($baselineProvenance['fidelity'] ?? EvidenceProvenance::FidelityMeta);
                $evidenceFidelity = EvidenceProvenance::weakerFidelity($baselineFidelity, $currentEvidence->fidelity);

                $drift[] = [
                    'change_type' => 'different_version',
                    'severity' => $this->severityForChangeType($severityMapping, 'different_version'),
                    'subject_type' => $baselineItem['subject_type'],
                    'subject_external_id' => $baselineItem['subject_external_id'],
                    'policy_type' => $baselineItem['policy_type'],
                    'evidence_fidelity' => $evidenceFidelity,
                    'baseline_hash' => $baselineItem['baseline_hash'],
                    'current_hash' => $currentEvidence->hash,
                    'evidence' => [
                        'change_type' => 'different_version',
                        'policy_type' => $baselineItem['policy_type'],
                        'display_name' => $baselineItem['meta_jsonb']['display_name'] ?? null,
                        'baseline_hash' => $baselineItem['baseline_hash'],
                        'current_hash' => $currentEvidence->hash,
                        'baseline' => [
                            'hash' => $baselineItem['baseline_hash'],
                            'provenance' => $baselineProvenance,
                        ],
                        'current' => [
                            'hash' => $currentEvidence->hash,
                            'provenance' => $currentEvidence->provenance(),
                        ],
                    ],
                ];
            }
        }

        foreach ($currentItems as $key => $currentItem) {
            if (! array_key_exists($key, $baselineItems)) {
                $currentEvidence = $resolvedCurrentEvidence[$key] ?? null;

                if (! $currentEvidence instanceof ResolvedEvidence) {
                    $missingCurrentEvidence++;

                    continue;
                }

                $drift[] = [
                    'change_type' => 'unexpected_policy',
                    'severity' => $this->severityForChangeType($severityMapping, 'unexpected_policy'),
                    'subject_type' => 'policy',
                    'subject_external_id' => $currentItem['subject_external_id'],
                    'policy_type' => $currentItem['policy_type'],
                    'evidence_fidelity' => EvidenceProvenance::FidelityMeta,
                    'baseline_hash' => '',
                    'current_hash' => $currentEvidence->hash,
                    'evidence' => [
                        'change_type' => 'unexpected_policy',
                        'policy_type' => $currentItem['policy_type'],
                        'display_name' => $currentItem['meta_jsonb']['display_name'] ?? null,
                    ],
                ];
            }
        }

        return [
            'drift' => $drift,
            'evidence_gaps' => [
                'missing_baseline' => 0,
                'missing_current' => $missingCurrentEvidence,
                'missing_both' => 0,
            ],
        ];
    }

    /**
     * @param  array<string, array{subject_external_id: string, policy_type: string, meta_jsonb: array<string, mixed>}>  $currentItems
     * @param  array<string, ResolvedEvidence|null>  $resolvedCurrentEvidence
     * @return array{
     *   subjects_total: int,
     *   resolved_total: int,
     *   resolved_content: int,
     *   resolved_meta: int,
     *   policy_types_content: list<string>,
     *   policy_types_meta_only: list<string>
     * }
     */
    private function summarizeCurrentEvidenceCoverage(array $currentItems, array $resolvedCurrentEvidence): array
    {
        $subjectsTotal = count($currentItems);
        $resolvedContent = 0;
        $resolvedMeta = 0;

        /**
         * @var array<string, array{resolved_content: int, resolved_meta: int}>
         */
        $resolvedByType = [];

        foreach ($currentItems as $key => $item) {
            $type = (string) ($item['policy_type'] ?? '');

            if ($type === '') {
                continue;
            }

            $resolvedByType[$type] ??= ['resolved_content' => 0, 'resolved_meta' => 0];

            $evidence = $resolvedCurrentEvidence[$key] ?? null;

            if (! $evidence instanceof ResolvedEvidence) {
                continue;
            }

            if ($evidence->fidelity === EvidenceProvenance::FidelityContent) {
                $resolvedContent++;
                $resolvedByType[$type]['resolved_content']++;
            } else {
                $resolvedMeta++;
                $resolvedByType[$type]['resolved_meta']++;
            }
        }

        $policyTypesContent = [];
        $policyTypesMetaOnly = [];

        foreach ($resolvedByType as $policyType => $counts) {
            if ($counts['resolved_content'] > 0) {
                $policyTypesContent[] = $policyType;

                continue;
            }

            if ($counts['resolved_meta'] > 0) {
                $policyTypesMetaOnly[] = $policyType;
            }
        }

        sort($policyTypesContent, SORT_STRING);
        sort($policyTypesMetaOnly, SORT_STRING);

        return [
            'subjects_total' => $subjectsTotal,
            'resolved_total' => $resolvedContent + $resolvedMeta,
            'resolved_content' => $resolvedContent,
            'resolved_meta' => $resolvedMeta,
            'policy_types_content' => $policyTypesContent,
            'policy_types_meta_only' => $policyTypesMetaOnly,
        ];
    }

    /**
     * @param  array<string, array{subject_type: string, subject_external_id: string, policy_type: string, baseline_hash: string, meta_jsonb: array<string, mixed>}>  $baselineItems
     * @return array{
     *   baseline_total: int,
     *   baseline_content: int,
     *   baseline_meta: int,
     *   baseline_policy_types_content: list<string>,
     *   baseline_policy_types_meta_only: list<string>
     * }
     */
    private function summarizeBaselineEvidenceCoverage(array $baselineItems): array
    {
        $baselineTotal = count($baselineItems);
        $baselineContent = 0;
        $baselineMeta = 0;

        /**
         * @var array<string, array{baseline_content: int, baseline_meta: int}>
         */
        $countsByType = [];

        foreach ($baselineItems as $key => $item) {
            $type = (string) ($item['policy_type'] ?? '');

            if ($type === '') {
                continue;
            }

            $countsByType[$type] ??= ['baseline_content' => 0, 'baseline_meta' => 0];

            $provenance = $this->baselineProvenanceFromMetaJsonb($item['meta_jsonb'] ?? []);
            $fidelity = (string) ($provenance['fidelity'] ?? EvidenceProvenance::FidelityMeta);

            if ($fidelity === EvidenceProvenance::FidelityContent) {
                $baselineContent++;
                $countsByType[$type]['baseline_content']++;
            } else {
                $baselineMeta++;
                $countsByType[$type]['baseline_meta']++;
            }
        }

        $policyTypesContent = [];
        $policyTypesMetaOnly = [];

        foreach ($countsByType as $policyType => $counts) {
            if (($counts['baseline_content'] ?? 0) > 0) {
                $policyTypesContent[] = $policyType;

                continue;
            }

            if (($counts['baseline_meta'] ?? 0) > 0) {
                $policyTypesMetaOnly[] = $policyType;
            }
        }

        sort($policyTypesContent, SORT_STRING);
        sort($policyTypesMetaOnly, SORT_STRING);

        return [
            'baseline_total' => $baselineTotal,
            'baseline_content' => $baselineContent,
            'baseline_meta' => $baselineMeta,
            'baseline_policy_types_content' => $policyTypesContent,
            'baseline_policy_types_meta_only' => $policyTypesMetaOnly,
        ];
    }

    /**
     * @param  array<string, mixed>  $metaJsonb
     * @return array{fidelity: string, source: string, observed_at: ?string, observed_operation_run_id: ?int}
     */
    private function baselineProvenanceFromMetaJsonb(array $metaJsonb): array
    {
        $evidence = $metaJsonb;

        if (is_array($metaJsonb['evidence'] ?? null)) {
            $evidence = $metaJsonb['evidence'];
        }

        $fidelity = $evidence['fidelity'] ?? EvidenceProvenance::FidelityMeta;
        $fidelity = is_string($fidelity) ? strtolower(trim($fidelity)) : EvidenceProvenance::FidelityMeta;
        if (! EvidenceProvenance::isValidFidelity($fidelity)) {
            $fidelity = EvidenceProvenance::FidelityMeta;
        }

        $source = $evidence['source'] ?? EvidenceProvenance::SourceInventory;
        $source = is_string($source) ? strtolower(trim($source)) : EvidenceProvenance::SourceInventory;
        if (! EvidenceProvenance::isValidSource($source)) {
            $source = EvidenceProvenance::SourceInventory;
        }

        $observedAt = $evidence['observed_at'] ?? null;
        $observedAt = is_string($observedAt) ? trim($observedAt) : null;

        $observedAtCarbon = null;
        if (is_string($observedAt) && $observedAt !== '') {
            try {
                $observedAtCarbon = CarbonImmutable::parse($observedAt);
            } catch (\Throwable) {
                $observedAtCarbon = null;
            }
        }

        $observedOperationRunId = $evidence['observed_operation_run_id'] ?? null;
        $observedOperationRunId = is_numeric($observedOperationRunId) ? (int) $observedOperationRunId : null;

        return EvidenceProvenance::build(
            fidelity: $fidelity,
            source: $source,
            observedAt: $observedAtCarbon,
            observedOperationRunId: $observedOperationRunId,
        );
    }

    /**
     * Upsert drift findings using stable fingerprints.
     *
     * @param  array<int, array{change_type: string, severity: string, subject_type: string, subject_external_id: string, policy_type: string, baseline_hash: string, current_hash: string, evidence: array<string, mixed>}>  $driftResults
     * @return array{processed_count: int, created_count: int, reopened_count: int, unchanged_count: int, seen_fingerprints: array<int, string>}
     */
    private function upsertFindings(
        Tenant $tenant,
        BaselineProfile $profile,
        int $baselineSnapshotId,
        string $scopeKey,
        array $driftResults,
    ): array {
        $tenantId = (int) $tenant->getKey();
        $observedAt = CarbonImmutable::now();
        $processedCount = 0;
        $createdCount = 0;
        $reopenedCount = 0;
        $unchangedCount = 0;
        $seenFingerprints = [];

        foreach ($driftResults as $driftItem) {
            $recurrenceKey = $this->recurrenceKey(
                tenantId: $tenantId,
                baselineSnapshotId: $baselineSnapshotId,
                policyType: $driftItem['policy_type'],
                subjectExternalId: $driftItem['subject_external_id'],
                changeType: $driftItem['change_type'],
            );

            $fingerprint = $recurrenceKey;

            $seenFingerprints[] = $fingerprint;

            $finding = Finding::query()
                ->where('tenant_id', $tenantId)
                ->where('fingerprint', $fingerprint)
                ->first();

            $isNewFinding = ! $finding instanceof Finding;

            if ($isNewFinding) {
                $finding = new Finding;
            } else {
                $this->observeFinding(
                    finding: $finding,
                    observedAt: $observedAt,
                    currentOperationRunId: (int) $this->operationRun->getKey(),
                );
            }

            $finding->forceFill([
                'tenant_id' => $tenantId,
                'finding_type' => Finding::FINDING_TYPE_DRIFT,
                'source' => 'baseline.compare',
                'scope_key' => $scopeKey,
                'subject_type' => $driftItem['subject_type'],
                'subject_external_id' => $driftItem['subject_external_id'],
                'severity' => $driftItem['severity'],
                'fingerprint' => $fingerprint,
                'recurrence_key' => $recurrenceKey,
                'evidence_jsonb' => $driftItem['evidence'],
                'evidence_fidelity' => $driftItem['evidence_fidelity'] ?? EvidenceProvenance::FidelityMeta,
                'baseline_operation_run_id' => null,
                'current_operation_run_id' => (int) $this->operationRun->getKey(),
            ]);

            if ($isNewFinding) {
                $finding->forceFill([
                    'status' => Finding::STATUS_NEW,
                    'reopened_at' => null,
                    'resolved_at' => null,
                    'resolved_reason' => null,
                    'acknowledged_at' => null,
                    'acknowledged_by_user_id' => null,
                    'first_seen_at' => $observedAt,
                    'last_seen_at' => $observedAt,
                    'times_seen' => 1,
                ]);

                $createdCount++;
            } elseif (Finding::isTerminalStatus($finding->status)) {
                $finding->forceFill([
                    'status' => Finding::STATUS_REOPENED,
                    'reopened_at' => now(),
                    'resolved_at' => null,
                    'resolved_reason' => null,
                    'closed_at' => null,
                    'closed_reason' => null,
                    'closed_by_user_id' => null,
                ]);

                $reopenedCount++;
            } else {
                $unchangedCount++;
            }

            $finding->save();
            $processedCount++;
        }

        return [
            'processed_count' => $processedCount,
            'created_count' => $createdCount,
            'reopened_count' => $reopenedCount,
            'unchanged_count' => $unchangedCount,
            'seen_fingerprints' => array_values(array_unique($seenFingerprints)),
        ];
    }

    private function observeFinding(Finding $finding, CarbonImmutable $observedAt, int $currentOperationRunId): void
    {
        if ($finding->first_seen_at === null) {
            $finding->first_seen_at = $observedAt;
        }

        if ($finding->last_seen_at === null || $observedAt->greaterThan(CarbonImmutable::instance($finding->last_seen_at))) {
            $finding->last_seen_at = $observedAt;
        }

        $timesSeen = is_numeric($finding->times_seen) ? (int) $finding->times_seen : 0;

        if ((int) ($finding->current_operation_run_id ?? 0) !== $currentOperationRunId) {
            $finding->times_seen = max(0, $timesSeen) + 1;
        } elseif ($timesSeen < 1) {
            $finding->times_seen = 1;
        }
    }

    /**
     * Stable identity for baseline-compare findings, scoped to a baseline snapshot.
     */
    private function recurrenceKey(
        int $tenantId,
        int $baselineSnapshotId,
        string $policyType,
        string $subjectExternalId,
        string $changeType,
    ): string {
        $parts = [
            (string) $tenantId,
            (string) $baselineSnapshotId,
            $this->normalizeKeyPart($policyType),
            $this->normalizeKeyPart($subjectExternalId),
            $this->normalizeKeyPart($changeType),
        ];

        return hash('sha256', implode('|', $parts));
    }

    private function normalizeKeyPart(string $value): string
    {
        return trim(mb_strtolower($value));
    }

    /**
     * @param  array<int, array{change_type: string}>  $driftResults
     * @return array<string, int>
     */
    private function countByChangeType(array $driftResults): array
    {
        $counts = [];

        foreach ($driftResults as $item) {
            $changeType = (string) ($item['change_type'] ?? '');

            if ($changeType === '') {
                continue;
            }

            $counts[$changeType] = ($counts[$changeType] ?? 0) + 1;
        }

        ksort($counts);

        return $counts;
    }

    /**
     * @param  array<int, array{severity: string}>  $driftResults
     * @return array<string, int>
     */
    private function countBySeverity(array $driftResults): array
    {
        $counts = [];

        foreach ($driftResults as $item) {
            $severity = $item['severity'];
            $counts[$severity] = ($counts[$severity] ?? 0) + 1;
        }

        return $counts;
    }

    /**
     * @return array<string, string>
     */
    private function resolveSeverityMapping(Workspace $workspace, SettingsResolver $settingsResolver): array
    {
        try {
            $mapping = $settingsResolver->resolveValue(
                workspace: $workspace,
                domain: 'baseline',
                key: 'severity_mapping',
            );
        } catch (\InvalidArgumentException) {
            // Settings keys are registry-backed; if this key is missing (e.g. during rollout),
            // fall back to built-in defaults rather than failing the entire compare run.
            return [];
        }

        return is_array($mapping) ? $mapping : [];
    }

    /**
     * @param  array<string, string>  $severityMapping
     */
    private function severityForChangeType(array $severityMapping, string $changeType): string
    {
        $severity = $severityMapping[$changeType] ?? null;

        if (! is_string($severity) || $severity === '') {
            return match ($changeType) {
                'missing_policy' => Finding::SEVERITY_HIGH,
                'different_version' => Finding::SEVERITY_MEDIUM,
                default => Finding::SEVERITY_LOW,
            };
        }

        return $severity;
    }

    private function auditStarted(
        AuditLogger $auditLogger,
        Tenant $tenant,
        BaselineProfile $profile,
        ?User $initiator,
    ): void {
        $auditLogger->log(
            tenant: $tenant,
            action: 'baseline.compare.started',
            context: [
                'metadata' => [
                    'operation_run_id' => (int) $this->operationRun->getKey(),
                    'baseline_profile_id' => (int) $profile->getKey(),
                    'baseline_profile_name' => (string) $profile->name,
                ],
            ],
            actorId: $initiator?->id,
            actorEmail: $initiator?->email,
            actorName: $initiator?->name,
            resourceType: 'baseline_profile',
            resourceId: (string) $profile->getKey(),
        );
    }

    private function auditCompleted(
        AuditLogger $auditLogger,
        Tenant $tenant,
        BaselineProfile $profile,
        ?User $initiator,
        array $summaryCounts,
    ): void {
        $auditLogger->log(
            tenant: $tenant,
            action: 'baseline.compare.completed',
            context: [
                'metadata' => [
                    'operation_run_id' => (int) $this->operationRun->getKey(),
                    'baseline_profile_id' => (int) $profile->getKey(),
                    'baseline_profile_name' => (string) $profile->name,
                    'findings_total' => $summaryCounts['total'] ?? 0,
                    'high' => $summaryCounts['high'] ?? 0,
                    'medium' => $summaryCounts['medium'] ?? 0,
                    'low' => $summaryCounts['low'] ?? 0,
                ],
            ],
            actorId: $initiator?->id,
            actorEmail: $initiator?->email,
            actorName: $initiator?->name,
            resourceType: 'operation_run',
            resourceId: (string) $this->operationRun->getKey(),
        );
    }
}