<?php

declare(strict_types=1);

namespace Tests\Feature;

use App\Listeners\UrlDiscoveredListener;
use App\Models\Page;
use App\Models\PageLink;
use Carbon\CarbonImmutable;
use Illuminate\Events\CallQueuedListener;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\Queue;
use Lvl0\FediDiscover\Config\InstanceType;
use Lvl0\FediDiscover\Events\UrlDiscovered;
use Lvl0\FediDiscover\Models\Instance;
use Tests\TestCase;

class UrlDiscoveryTest extends TestCase
{
    use RefreshDatabase;

    // ---------------------------------------------------------------------------
    // Helpers
    // ---------------------------------------------------------------------------

    private function makeInstance(): Instance
    {
        return Instance::factory()
            ->type(InstanceType::Mastodon)
            ->enabled()
            ->create();
    }

    private function makeEvent(Instance $instance, array $overrides = []): UrlDiscovered
    {
        return new UrlDiscovered(
            url: $overrides['url'] ?? 'https://example-blog.com/article',
            instanceId: $overrides['instanceId'] ?? $instance->id,
            discoveredAt: $overrides['discoveredAt'] ?? CarbonImmutable::parse('2026-04-26T12:00:00Z'),
            postUrl: array_key_exists('postUrl', $overrides) ? $overrides['postUrl'] : 'https://mastodon.social/@alice/109876543210',
            postBody: array_key_exists('postBody', $overrides) ? $overrides['postBody'] : 'check this out https://example-blog.com/article',
        );
    }

    // ---------------------------------------------------------------------------
    // Test 9 — happy path
    // ---------------------------------------------------------------------------

    public function test_listener_creates_target_page_and_source_page_with_link(): void
    {
        $instance = $this->makeInstance();
        $discoveredAt = CarbonImmutable::parse('2026-04-26T12:00:00Z');

        $event = new UrlDiscovered(
            url: 'https://example-blog.com/article',
            instanceId: $instance->id,
            discoveredAt: $discoveredAt,
            postUrl: 'https://mastodon.social/@alice/109876543210',
            postBody: 'check this out https://example-blog.com/article',
        );

        event($event);

        // Target page
        $targetPage = Page::where('url', 'https://example-blog.com/article')->first();
        $this->assertNotNull($targetPage);

        // Source page
        $sourcePage = Page::where('url', 'https://mastodon.social/@alice/109876543210')->first();
        $this->assertNotNull($sourcePage);

        // Edge
        $link = PageLink::where('source_page_id', $sourcePage->id)
            ->where('target_page_id', $targetPage->id)
            ->first();
        $this->assertNotNull($link);
    }

    // ---------------------------------------------------------------------------
    // Test 10 — idempotency
    // ---------------------------------------------------------------------------

    public function test_listener_is_idempotent_on_repeated_event(): void
    {
        $instance = $this->makeInstance();
        $event = $this->makeEvent($instance);

        event($event);
        event($event);

        $this->assertSame(2, Page::count());
        $this->assertSame(1, PageLink::count());
    }

    // ---------------------------------------------------------------------------
    // Test 11 — null postUrl: only target page, no edge
    // ---------------------------------------------------------------------------

    public function test_listener_with_null_post_url_creates_only_target_page(): void
    {
        $instance = $this->makeInstance();
        $event = $this->makeEvent($instance, ['postUrl' => null, 'postBody' => null]);

        event($event);

        $this->assertSame(1, Page::count());
        $this->assertSame(0, PageLink::count());

        $targetPage = Page::where('url', 'https://example-blog.com/article')->first();
        $this->assertNotNull($targetPage);
    }

    // ---------------------------------------------------------------------------
    // Integration — UrlDiscovered event enqueues crawls for both pages via observer
    // ---------------------------------------------------------------------------

    public function test_url_discovered_event_enqueues_crawls_via_observer(): void
    {
        $instance = $this->makeInstance();

        $event = new UrlDiscovered(
            url: 'https://example-blog.com/article',
            instanceId: $instance->id,
            discoveredAt: CarbonImmutable::parse('2026-04-26T12:00:00Z'),
            postUrl: 'https://mastodon.social/@alice/109876543210',
            postBody: 'check this out https://example-blog.com/article',
        );

        event($event);

        // Listener creates 2 pages (target + source); observer fires for each → 2 crawl rows
        $this->assertDatabaseCount('page_crawls', 2);
        $this->assertDatabaseHas('page_crawls', ['domain' => 'example-blog.com']);
        $this->assertDatabaseHas('page_crawls', ['domain' => 'mastodon.social']);
    }

    // ---------------------------------------------------------------------------
    // Test 12 — listener is queued, not run inline
    // ---------------------------------------------------------------------------

    public function test_listener_is_pushed_to_queue_not_run_inline(): void
    {
        Queue::fake();

        $instance = $this->makeInstance();
        $event = $this->makeEvent($instance);

        event($event);

        Queue::assertPushed(CallQueuedListener::class, function (CallQueuedListener $job): bool {
            return $job->class === UrlDiscoveredListener::class;
        });
    }
}