<?php

namespace Tests\Feature;

use App\Models\Comment;
use App\Models\User;
use App\Models\Video;
use App\Rules\ReservedIdentifier;
use App\Support\SafeNotifier;
use App\Http\Middleware\VerifyCsrfToken;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\DB;
use Tests\TestCase;

/**
 * Phase 1 audit remediation: security + data-integrity regression tests.
 *
 * These tests run on a scratch SQLite file in storage/testing.sqlite so they
 * can't collide with the shared dev DB. phpunit.xml keeps DB_CONNECTION out
 * of the test env so this per-class override is where the swap happens.
 */
class Phase1SecurityTest extends TestCase
{
    use RefreshDatabase;

    protected function setUp(): void
    {
        // Force the test runner onto an in-memory SQLite BEFORE the framework
        // boots, so RefreshDatabase migrates the throwaway DB and never the
        // shared dev file. Env vars are read during app bootstrap in
        // CreatesApplication, which is why putenv has to come first.
        putenv('DB_CONNECTION=sqlite');
        putenv('DB_DATABASE=:memory:');
        $_ENV['DB_CONNECTION'] = 'sqlite';
        $_ENV['DB_DATABASE']   = ':memory:';

        parent::setUp();

        // Strip the two middleware that fight the test client: CSRF (no
        // token flow in postJson) and AuthenticateSession (which rotates
        // the session on cross-request assertions and 302s to APP_URL).
        $this->withoutMiddleware([
            VerifyCsrfToken::class,
            \Illuminate\Session\Middleware\AuthenticateSession::class,
        ]);
    }

    // ─── ReservedIdentifier rule ──────────────────────────

    public function test_reserved_name_rule_blocks_impersonation_candidates(): void
    {
        $rule = new ReservedIdentifier('name');

        foreach (['admin', 'Administrator', 'super_admin', 'super-admin',
                  'SuperAdmin', 'TAKEONE', 'support', 'root', 'Postmaster'] as $name) {
            $failed = false;
            $rule->validate('name', $name, function () use (&$failed) { $failed = true; });
            $this->assertTrue($failed, "Expected name '{$name}' to be reserved");
        }
    }

    public function test_reserved_email_rule_matches_on_local_part_only(): void
    {
        $rule = new ReservedIdentifier('email');

        $failed = false;
        $rule->validate('email', 'admin@example.com', function () use (&$failed) { $failed = true; });
        $this->assertTrue($failed);

        $failed = false;
        $rule->validate('email', 'admin.user@example.com', function () use (&$failed) { $failed = true; });
        $this->assertFalse($failed, 'Only exact local-part should match; "admin.user" is a real person.');
    }

    public function test_reserved_rule_allows_normal_names(): void
    {
        $rule = new ReservedIdentifier('name');

        foreach (['Alice', 'Bob Smith', 'John Doe', 'الحسن'] as $name) {
            $failed = false;
            $rule->validate('name', $name, function () use (&$failed) { $failed = true; });
            $this->assertFalse($failed, "Expected name '{$name}' to be allowed");
        }
    }

    // ─── SafeNotifier swallows mail failures ──────────────

    public function test_safe_notifier_logs_but_does_not_throw_on_failure(): void
    {
        // A fake notifiable whose notify() blows up — stands in for the Gmail
        // 535 case where sending throws out of the transport layer.
        $exploding = new class {
            public function notify($n): void { throw new \RuntimeException('smtp exploded'); }
            public function getKey(): int { return 1; }
        };

        $notification = new \App\Notifications\VerifyEmail;

        // Call must not throw — if it did, PHPUnit would mark this test as errored.
        SafeNotifier::send($exploding, $notification);

        $this->assertTrue(true, 'SafeNotifier swallowed the throw');
    }

    // ─── Comment dedupe ───────────────────────────────────

    public function test_identical_comments_within_60s_are_collapsed(): void
    {
        [$user, $video] = $this->makeUserAndVideo();
        $this->actingAs($user);

        $first = $this->postJson("/videos/".Video::encodeId($video->id)."/comments", ['body' => 'Great goal!']);
        $first->assertOk();
        $firstId = $first->json('comment.id');

        $second = $this->postJson("/videos/".Video::encodeId($video->id)."/comments", ['body' => 'Great goal!']);
        $second->assertOk();
        $secondId = $second->json('comment.id');

        $this->assertSame($firstId, $secondId, 'Duplicate within 60s should return the first row, not insert a new one.');
        $this->assertSame(1, Comment::where('video_id', $video->id)->count());
    }

    public function test_idempotency_key_returns_the_same_comment(): void
    {
        [$user, $video] = $this->makeUserAndVideo();
        $this->actingAs($user);

        $key = 'test-idem-key-' . bin2hex(random_bytes(8));

        $a = $this->withHeaders(['X-Idempotency-Key' => $key])
                  ->postJson("/videos/".Video::encodeId($video->id)."/comments", ['body' => 'First body']);
        $a->assertOk();
        $aId = $a->json('comment.id');

        // Different body, same key — because the first write cached the id,
        // the second call returns it unchanged.
        $b = $this->withHeaders(['X-Idempotency-Key' => $key])
                  ->postJson("/videos/".Video::encodeId($video->id)."/comments", ['body' => 'Different body']);
        $b->assertOk();
        $bId = $b->json('comment.id');

        $this->assertSame($aId, $bId, 'Same idempotency key must return the same comment id.');
    }

    // ─── Owner view exclusion ─────────────────────────────

    public function test_owner_view_is_not_recorded(): void
    {
        [$user, $video] = $this->makeUserAndVideo();
        $this->actingAs($user);

        $this->get("/videos/{$video->id}");

        $this->assertSame(0, DB::table('video_views')->where('video_id', $video->id)->count(),
            'Views by the video owner must not be counted.');
    }

    // ─── Helpers ──────────────────────────────────────────

    private function makeUserAndVideo(): array
    {
        $user = User::factory()->create([
            'username' => 'u'.substr(bin2hex(random_bytes(4)), 0, 8),
        ]);

        $video = Video::create([
            'user_id'    => $user->id,
            'title'      => 'Test video',
            'description'=> 'Hello',
            'filename'   => 'users/x/videos/y/video.mp4',
            'path'       => 'users/x/videos/y/video.mp4',
            'type'       => 'generic',
            'visibility' => 'public',
            'status'     => 'ready',
        ]);

        return [$user, $video];
    }
}