<?php

declare(strict_types=1);

function spec439ConstitutionContents(): string
{
    $path = repo_path('.specify/memory/constitution.md');

    expect(is_file($path))->toBeTrue();

    return (string) file_get_contents($path);
}

function spec439ConstitutionUnrelatedBody(string $contents): string
{
    $withoutSyncImpact = preg_replace(
        '/\A<!--\RSync Impact Report.*?-->\R\R/s',
        '',
        $contents,
    );
    $withoutBranchAmendment = preg_replace(
        '/### Spec-First Workflow\R.*?(?=\R## Quality Gates)/s',
        "### Spec-First Workflow\n[BRANCH-TOPOLOGY-AMENDMENT]\n",
        $withoutSyncImpact,
    );
    $withoutAmendmentMetadata = preg_replace(
        '/^\*\*Version\*\*:.*$/m',
        '**Version**: [AMENDMENT-METADATA]',
        $withoutBranchAmendment,
    );

    if (! is_string($withoutAmendmentMetadata)) {
        throw new RuntimeException('Unable to normalize Constitution amendment boundaries.');
    }

    return $withoutAmendmentMetadata;
}

it('defines the three canonical branch roles and fail-closed scope routing', function (): void {
    $contents = spec439ConstitutionContents();

    expect($contents)
        ->toContain(
            '`dev` is the repository-wide integration and promotion branch',
            '`platform-dev` is the integration branch for TenantPilot platform work',
            '`website-dev` is the integration branch for website work',
            'Ordinary platform work MUST branch from, target, and diff against `platform-dev`',
            'ordinary website work MUST branch from, target, and diff against `website-dev`',
            'Cross-stream integration, promotion, and repository-governance work MUST be explicitly classified',
            'Such work MAY target `dev`; the existence of `dev` alone MUST NOT imply that target.',
            'Ambiguous or missing branch-family/ref resolution MUST fail closed.',
            '`origin/dev`, the wrong branch family, `HEAD~1`, or an arbitrary prior commit',
        )
        ->not->toContain('- New work branches from `dev` using `feat/<NNN>-<slug>`');

    expect(substr_count($contents, '### Spec-First Workflow'))->toBe(1);
});

it('keeps the major amendment metadata and Sync Impact report coherent', function (): void {
    $contents = spec439ConstitutionContents();

    expect($contents)
        ->toContain(
            '- Version change: 2.16.0 -> 3.0.0',
            'MAJOR because a normative universal branch rule is redefined',
            '- Added sections: None',
            '- Removed sections: None',
            '✅ `Agents.md`: directly conflicting universal `dev` instructions were',
            '✅ Specs 437 and 438: historical/completed or deferred context remains',
            '**Version**: 3.0.0 | **Ratified**: 2026-01-03 | **Last Amended**: 2026-07-11',
        )
        ->not->toContain('⏳ `Agents.md`');

    expect(substr_count($contents, 'Sync Impact Report'))->toBe(1)
        ->and(substr_count($contents, '**Version**:'))->toBe(1);
});

it('locks all Constitution content outside the authorized amendment boundaries', function (): void {
    $normalized = spec439ConstitutionUnrelatedBody(spec439ConstitutionContents());

    expect(hash('sha256', $normalized))
        ->toBe('9ea4019798f1854e7b513a8fe0bce2529a19207d0b16e81a08582e6b661b8e74');
});

it('keeps authoritative repository branch instructions synchronized', function (): void {
    $instructions = (string) file_get_contents(repo_path('Agents.md'));

    expect($instructions)
        ->toContain(
            '`dev`: repository-weite Integration und Promotion',
            '`platform-dev`: Integration für TenantPilot-Plattformarbeit',
            '`website-dev`: Integration für Website-Arbeit',
            'Normale Plattformarbeit startet von und zielt auf `platform-dev`',
            'Website-Arbeit startet von und zielt auf `website-dev`',
            'Cross-Stream-, Promotion- und Repository-Governance-Arbeit muss ausdrücklich',
            '`dev` darf dabei ein',
            'bewusstes Integrations-/Promotion-Ziel sein, aber kein stiller Fallback.',
            'Für normale Plattformarbeit ist das `origin/platform-dev`',
            'Website-Arbeit `origin/website-dev`',
            '`origin/dev` ist nur für ausdrücklich als',
        )
        ->not->toContain(
            '- Default / Integrations-Branch: `dev`',
            'Neue Arbeit läuft über Feature-Branches von `dev`',
            'PR/MR: `feat/...` → `dev`',
            "git merge origin/dev\n",
        );
});