<?php

declare(strict_types=1);

use App\Mail\AuditChainBreachMail;
use Illuminate\Foundation\Testing\DatabaseTransactions;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Mail;
use Tests\Concerns\SharesSupplierPdo;

uses(DatabaseTransactions::class);
uses(SharesSupplierPdo::class);

// ---------------------------------------------------------------------------
// Helper: ensure at least one active saas_admin_user row exists (FK for incidents_log)
// ---------------------------------------------------------------------------
function ensureAuditAdmin(): int
{
    $id = DB::table('saas_admin_users')
        ->where('is_active', true)
        ->whereNull('deleted_at')
        ->value('id');

    if ($id !== null) {
        return (int) $id;
    }

    return (int) DB::table('saas_admin_users')->insertGetId([
        'email' => 'audit-cron@liderra.ru',
        'full_name' => 'Audit Cron',
        'password_hash' => '$2y$12$placeholder',
        'role' => 'dev_oncall',
        'is_active' => true,
        'created_at' => now(),
    ]);
}

// ---------------------------------------------------------------------------
// Helper: insert N rows into auth_log via the normal path (trigger fills log_hash).
// Uses the 3rd constraint variant: actor_type='tenant_user', user_id=NULL,
// saas_admin_user_id=NULL, email IS NOT NULL (login attempt with unknown email).
// ---------------------------------------------------------------------------
function insertAuthLogRows(int $n, ?int $tenantId = null): void
{
    for ($i = 0; $i < $n; $i++) {
        DB::table('auth_log')->insert([
            'actor_type' => 'tenant_user',
            'tenant_id' => $tenantId,
            'email' => "test{$i}@example.com",
            'event' => 'login_failed',
            'ip_address' => '127.0.0.1',
            'created_at' => now(),
        ]);
    }
}

// ---------------------------------------------------------------------------
// Setup
// ---------------------------------------------------------------------------
beforeEach(function () {
    ensureAuditAdmin();
    Mail::fake();
});

// ===========================================================================
// TDD ANCHOR: clean chain must verify intact (serialization correctness gate)
// ===========================================================================

test('clean auth_log chain verifies intact', function () {
    insertAuthLogRows(3);

    $this->artisan('audit:verify-chains')->assertSuccessful();

    // No incident should be created for an intact chain
    $count = DB::connection('pgsql_supplier')
        ->table('incidents_log')
        ->where('summary', 'like', '%chain%auth_log%')
        ->count();

    expect($count)->toBe(0);

    // No email should be sent
    Mail::assertNothingSent();
});

test('empty tables are skipped gracefully (no false positive)', function () {
    // auth_log might have rows from other tests but other tables are empty on dev.
    // The command must not raise an error on empty tables.
    $this->artisan('audit:verify-chains')->assertSuccessful();
    Mail::assertNothingSent();
});

test('multiple rows in auth_log all pass intact', function () {
    insertAuthLogRows(10);

    $this->artisan('audit:verify-chains')->assertSuccessful();

    Mail::assertNothingSent();
});

// ===========================================================================
// Tampering detection
// ===========================================================================

test('tampered auth_log row raises incident and sends email', function () {
    insertAuthLogRows(3);

    // Sanity: intact before tampering
    $this->artisan('audit:verify-chains')->assertSuccessful();
    Mail::assertNothingSent();

    // Tamper: disable triggers, mutate the first row's ip_address, re-enable.
    // DISABLE TRIGGER USER disables all user-defined triggers (audit_block_mutation
    // is BEFORE UPDATE, so without disabling it the UPDATE would be blocked).
    DB::statement('ALTER TABLE auth_log DISABLE TRIGGER USER');
    DB::table('auth_log')
        ->orderBy('id')
        ->limit(1)
        ->update(['ip_address' => '6.6.6.6']);
    DB::statement('ALTER TABLE auth_log ENABLE TRIGGER USER');

    // Now the command must detect the breach
    $this->artisan('audit:verify-chains')->assertFailed();

    $incident = DB::connection('pgsql_supplier')
        ->table('incidents_log')
        ->where('type', 'other')
        ->where('severity', 'high')
        ->where('summary', 'like', '%chain%auth_log%')
        ->first();

    expect($incident)->not->toBeNull();
    expect($incident->summary)->toContain('auth_log');

    Mail::assertSent(AuditChainBreachMail::class, function ($mail) {
        return $mail->tableName === 'auth_log';
    });
});

test('incident dedup: same table breach does not create duplicate within 24h', function () {
    insertAuthLogRows(3);

    // First tamper
    DB::statement('ALTER TABLE auth_log DISABLE TRIGGER USER');
    DB::table('auth_log')
        ->orderBy('id')
        ->limit(1)
        ->update(['ip_address' => '5.5.5.5']);
    DB::statement('ALTER TABLE auth_log ENABLE TRIGGER USER');

    $this->artisan('audit:verify-chains')->assertFailed();

    $countAfterFirst = DB::connection('pgsql_supplier')
        ->table('incidents_log')
        ->where('summary', 'like', '%chain%auth_log%')
        ->count();
    expect($countAfterFirst)->toBe(1);

    // Second run (same ongoing breach) must NOT create a second incident (dedup)
    $this->artisan('audit:verify-chains')->assertFailed();

    $countAfterSecond = DB::connection('pgsql_supplier')
        ->table('incidents_log')
        ->where('summary', 'like', '%chain%auth_log%')
        ->count();
    expect($countAfterSecond)->toBe(1);
});