<?php

namespace Tests\Feature;

use App\Models\AuditEvent;
use App\Models\BannedIp;
use App\Models\Setting;
use App\Services\BruteforceGuard;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\Cache;
use Tests\TestCase;

class BruteforceGuardBanTest extends TestCase
{
    use RefreshDatabase;

    protected function setUp(): void
    {
        parent::setUp();
        Cache::flush();
    }

    private function guard(): BruteforceGuard
    {
        return app(BruteforceGuard::class);
    }

    public function test_records_until_threshold_then_bans(): void
    {
        $g = $this->guard();
        Setting::put('bruteforce_maxretry', '3');

        $g->record('203.0.113.5', 'login');
        $g->record('203.0.113.5', 'login');
        $this->assertFalse($g->isBanned('203.0.113.5'));

        $g->record('203.0.113.5', 'login'); // 3rd → ban
        $this->assertTrue($g->isBanned('203.0.113.5'));
        $this->assertDatabaseHas('banned_ips', ['ip' => '203.0.113.5', 'reason' => 'login']);
        $this->assertDatabaseHas('audit_events', ['action' => 'auth.ip_banned', 'ip' => '203.0.113.5']);
    }

    public function test_exempt_ip_is_never_banned(): void
    {
        $g = $this->guard();
        Setting::put('bruteforce_maxretry', '1');
        for ($i = 0; $i < 5; $i++) {
            $g->record('192.168.1.50', 'login'); // private = default whitelist
        }
        $this->assertFalse($g->isBanned('192.168.1.50'));
        $this->assertDatabaseCount('banned_ips', 0);
    }

    public function test_disabled_records_nothing(): void
    {
        Setting::put('bruteforce_enabled', '0');
        Setting::put('bruteforce_maxretry', '1');
        $this->guard()->record('203.0.113.9', 'login');
        $this->assertDatabaseCount('banned_ips', 0);
    }

    public function test_unban_clears_row_and_cache(): void
    {
        $g = $this->guard();
        BannedIp::create(['ip' => '203.0.113.5', 'banned_until' => now()->addHour(), 'attempts' => 10]);
        $this->assertTrue($g->isBanned('203.0.113.5')); // populates cache
        $g->unban('203.0.113.5');
        $this->assertFalse($g->isBanned('203.0.113.5')); // no stale positive
        $this->assertDatabaseCount('banned_ips', 0);
    }

    public function test_expired_ban_is_not_active(): void
    {
        BannedIp::create(['ip' => '203.0.113.5', 'banned_until' => now()->subMinute(), 'attempts' => 10]);
        $this->assertFalse($this->guard()->isBanned('203.0.113.5'));
    }

    public function test_ipv4_mapped_ipv6_shares_one_ban(): void
    {
        $g = $this->guard();
        Setting::put('bruteforce_maxretry', '1');
        $g->record('203.0.113.5', 'login');                      // ban via plain IPv4
        $this->assertTrue($g->isBanned('::ffff:203.0.113.5'));   // mapped form is the same ban
    }

    // ── banNow (honeypot first-hit ban) audit dedup ─────────────────────────────

    public function test_bannow_audits_once_per_reason_within_the_window(): void
    {
        $g = $this->guard();

        $g->banNow('203.0.113.8', 'honeypot');
        $g->banNow('203.0.113.8', 'honeypot'); // same ip+reason inside 60s → the flood is deduped
        $this->assertDatabaseCount('audit_events', 1);

        $g->banNow('203.0.113.8', 'honeytoken'); // a DISTINCT reason is still audited
        $this->assertDatabaseCount('audit_events', 2);
    }

    public function test_bannow_releases_the_audit_slot_when_the_write_fails(): void
    {
        $g = $this->guard();

        // Make the FIRST audit insert throw (a transient DB blip), then heal.
        $fail = true;
        AuditEvent::creating(function () use (&$fail) {
            if ($fail) {
                $fail = false;
                throw new \RuntimeException('db blip');
            }
        });

        // The ban row must still be written; the audit fails and re-throws (the honeypot
        // caller swallows it). The dedup slot must NOT stay claimed after a failed write.
        try {
            $g->banNow('203.0.113.7', 'honeypot');
        } catch (\Throwable) {
            // expected — banNow re-throws the audit failure
        }

        $this->assertDatabaseHas('banned_ips', ['ip' => '203.0.113.7']); // ban persisted despite audit failure
        $this->assertDatabaseCount('audit_events', 0);                    // audit did not land
        $this->assertFalse(Cache::has('bruteforce:banaudit:203.0.113.7:honeypot')); // slot released, not burned

        // A retry inside the same 60s window now re-audits — the failure did not suppress it.
        $g->banNow('203.0.113.7', 'honeypot');
        $this->assertDatabaseHas('audit_events', ['action' => 'auth.ip_banned', 'ip' => '203.0.113.7']);
        $this->assertDatabaseCount('audit_events', 1);
    }
}