<?php

declare(strict_types=1);

use App\Models\User;
use Illuminate\Support\Facades\DB;
use Inertia\Testing\AssertableInertia;

function insertFollow(int $ownerId, int $followerId, ?\DateTimeInterface $at = null): void
{
    DB::table('user_followers')->insert([
        'user_id' => $ownerId,
        'follower_id' => $followerId,
        'created_at' => $at ?? now(),
    ]);
}

it('renders the public profile followers page for an existing username', function () {
    $owner = User::factory()->create(['username' => 'followowner']);
    $follower = User::factory()->create(['username' => 'realfollower']);
    $ownerFollows = User::factory()->create(['username' => 'ownerfollows']);

    insertFollow((int) $owner->id, (int) $follower->id);
    insertFollow((int) $ownerFollows->id, (int) $owner->id);

    $this->get('/@followowner/followers')
        ->assertOk()
        ->assertSee('http://skinbase26.test/@followowner/followers', false)
        ->assertSee('followowner Followers on Skinbase', false)
        ->assertSee('People who follow followowner on Skinbase.', false)
        ->assertInertia(fn (AssertableInertia $page) => $page
            ->component('Profile/ProfileShow')
            ->where('initialTab', 'followers')
            ->where('profileTabUrls.followers', url('/@followowner/followers'))
            ->where('followersListing.total', 1)
            ->where('followersListing.data.0.username', 'realfollower')
            ->where('followersListing.data.0.profile_url', '/@realfollower')
            ->missing('followersListing.data.0.email')
            ->has('profileTabUrls.posts')
            ->has('profileTabUrls.artworks'));
});

it('allows anonymous viewers to load public followers without authentication', function () {
    $owner = User::factory()->create(['username' => 'anonowner']);

    $this->get('/@anonowner/followers')->assertOk();
    $this->assertGuest();
});

it('does not return people the owner follows as followers', function () {
    $owner = User::factory()->create(['username' => 'semanticowner']);
    $follower = User::factory()->create(['username' => 'semanticfollower']);
    $following = User::factory()->create(['username' => 'semanticfollowing']);

    insertFollow((int) $owner->id, (int) $follower->id);
    insertFollow((int) $following->id, (int) $owner->id);

    $this->get('/@semanticowner/followers')
        ->assertOk()
        ->assertInertia(fn (AssertableInertia $page) => $page
            ->where('followersListing.total', 1)
            ->where('followersListing.data.0.username', 'semanticfollower')
            ->where('followersListing.data.0.username', fn ($username) => $username !== 'semanticfollowing'));
});

it('normalizes mixed-case usernames to the lowercase canonical followers URL', function () {
    User::factory()->create(['username' => 'CaseOwner']);

    $this->get('/@CaseOwner/followers')
        ->assertStatus(301)
        ->assertRedirect('/@caseowner/followers');
});

it('follows username_redirects to the current followers URL', function () {
    $user = User::factory()->create(['username' => 'newfollowuser']);

    DB::table('username_redirects')->insert([
        'old_username' => 'oldfollowuser',
        'new_username' => 'newfollowuser',
        'user_id' => $user->id,
        'created_at' => now(),
        'updated_at' => now(),
    ]);

    $this->get('/@oldfollowuser/followers')
        ->assertStatus(301)
        ->assertRedirect('/@newfollowuser/followers');
});

it('returns 404 for a nonexistent public followers username', function () {
    $this->get('/@missinguserzz/followers')->assertNotFound();
});

it('paginates public followers', function () {
    $owner = User::factory()->create(['username' => 'pageowner']);
    $followers = User::factory()->count(25)->create();

    foreach ($followers as $index => $follower) {
        insertFollow((int) $owner->id, (int) $follower->id, now()->subMinutes($index));
    }

    $this->get('/@pageowner/followers')
        ->assertOk()
        ->assertInertia(fn (AssertableInertia $page) => $page
            ->where('followersListing.per_page', 24)
            ->where('followersListing.current_page', 1)
            ->where('followersListing.last_page', 2)
            ->where('followersListing.total', 25)
            ->has('followersListing.data', 24));

    $this->get('/@pageowner/followers?page=2')
        ->assertOk()
        ->assertInertia(fn (AssertableInertia $page) => $page
            ->where('followersListing.current_page', 2)
            ->has('followersListing.data', 1));
});

it('redirects legacy following id and slug to the canonical followers URL', function () {
    $owner = User::factory()->create(['username' => 'legacyfollow']);

    $this->get('/following/' . $owner->id . '/old-outdated-slug')
        ->assertStatus(301)
        ->assertRedirect('/@legacyfollow/followers');
});

it('ignores a mismatched legacy slug and uses the current database username', function () {
    $owner = User::factory()->create(['username' => 'canonicalname']);

    $this->get('/following/' . $owner->id . '/wrong-slug')
        ->assertStatus(301)
        ->assertRedirect('/@canonicalname/followers');
});

it('returns 404 for a legacy following URL when the user id does not exist', function () {
    $this->get('/following/99999999/whatever')->assertNotFound();
});

it('preserves query strings when redirecting legacy following URLs', function () {
    $owner = User::factory()->create(['username' => 'qsowner']);

    $this->get('/following/' . $owner->id . '/old-slug?page=2&utm_source=legacy')
        ->assertStatus(301)
        ->assertRedirect('/@qsowner/followers?page=2&utm_source=legacy');
});

it('no longer emits the broken legacy following URL from the old profile template', function () {
    $blade = file_get_contents(resource_path('views/_legacy/profile.blade.php'));

    expect($blade)->not->toContain('/following/{{ $user->id }}');
    expect($blade)->toContain("/@' . strtolower((string) (\$user->username ?? \$uname)) . '/followers");
});

it('leaves authenticated /following root behavior unchanged', function () {
    $user = User::factory()->create();

    $this->actingAs($user)
        ->get('/following')
        ->assertRedirect(route('dashboard.following'));
});

it('leaves dashboard followers as the authenticated owner surface', function () {
    $user = User::factory()->create();

    $this->actingAs($user)
        ->get('/dashboard/followers')
        ->assertOk();
});

it('leaves studio followers as the creator-owner surface', function () {
    $user = User::factory()->create();

    $this->actingAs($user)
        ->get('/studio/followers')
        ->assertOk()
        ->assertInertia(fn (AssertableInertia $page) => $page->component('Studio/StudioFollowers'));
});

it('leaves the public followers API payload shape unchanged', function () {
    $owner = User::factory()->create(['username' => 'apiowner']);
    $follower = User::factory()->create(['username' => 'apifollower']);
    $following = User::factory()->create(['username' => 'apifollowing']);

    insertFollow((int) $owner->id, (int) $follower->id);
    insertFollow((int) $following->id, (int) $owner->id);

    $this->getJson('/api/user/apiowner/followers')
        ->assertOk()
        ->assertJsonPath('data.0.username', 'apifollower')
        ->assertJsonPath('data.0.profile_url', '/@apifollower')
        ->assertJsonMissingPath('data.0.email')
        ->assertJsonMissing(['username' => 'apifollowing']);
});

it('leaves other public profile tabs on their canonical routes', function () {
    $owner = User::factory()->create(['username' => 'tabowner']);

    $this->get('/@tabowner/artworks')
        ->assertOk()
        ->assertInertia(fn (AssertableInertia $page) => $page
            ->where('initialTab', 'artworks')
            ->where('profileTabUrls.followers', url('/@tabowner/followers'))
            ->where('profileTabUrls.artworks', url('/@tabowner/artworks')));
});

function profileSqlLooksLikePaginatedFollowers(string $sql): bool
{
    $normalized = strtolower($sql);

    if (! str_contains($normalized, 'user_followers')) {
        return false;
    }

    if (! str_contains($normalized, ' as uf') && ! str_contains($normalized, ' as "uf"')) {
        return false;
    }

    $isPaginatorCount = str_contains($normalized, 'aggregate')
        && str_contains($normalized, 'join');

    $isPageRows = str_contains($normalized, 'limit')
        && (str_contains($normalized, 'limit 24') || str_contains($normalized, 'limit ?'));

    return $isPaginatorCount || $isPageRows;
}

it('does not load paginated followers on the base profile, artworks, or about tabs', function () {
    $owner = User::factory()->create(['username' => 'lazyowner']);
    $followers = User::factory()->count(3)->create();

    foreach ($followers as $index => $follower) {
        insertFollow((int) $owner->id, (int) $follower->id, now()->subMinutes($index));
    }

    foreach (['/@lazyowner', '/@lazyowner/artworks', '/@lazyowner/about'] as $url) {
        DB::flushQueryLog();
        DB::enableQueryLog();

        $this->get($url)
            ->assertOk()
            ->assertInertia(fn (AssertableInertia $page) => $page
                ->where('followersListing', null)
                ->has('followerCount')
                ->has('recentFollowers')
                ->has('viewerIsFollowing')
                ->has('followAnalytics'));

        $paginatedQueries = collect(DB::getQueryLog())
            ->filter(fn (array $query): bool => profileSqlLooksLikePaginatedFollowers((string) $query['query']))
            ->values();

        expect($paginatedQueries)->toBeEmpty('paginated followers query ran on '.$url);
    }

    DB::disableQueryLog();
});

it('loads paginated followers only on the followers tab including page=2', function () {
    $owner = User::factory()->create(['username' => 'lazyfollow']);
    $followers = User::factory()->count(25)->create();

    foreach ($followers as $index => $follower) {
        insertFollow((int) $owner->id, (int) $follower->id, now()->subMinutes($index));
    }

    DB::flushQueryLog();
    DB::enableQueryLog();

    $this->get('/@lazyfollow/followers?page=2')
        ->assertOk()
        ->assertInertia(fn (AssertableInertia $page) => $page
            ->where('initialTab', 'followers')
            ->where('followersListing.current_page', 2)
            ->where('followersListing.per_page', 24)
            ->where('followersListing.total', 25)
            ->has('followersListing.data', 1)
            ->has('followerCount')
            ->has('recentFollowers'));

    $paginatedQueries = collect(DB::getQueryLog())
        ->filter(fn (array $query): bool => profileSqlLooksLikePaginatedFollowers((string) $query['query']))
        ->values();

    expect($paginatedQueries)->not->toBeEmpty();

    DB::disableQueryLog();
});

it('ignores ?page= on unrelated profile tabs and still skips followers pagination', function () {
    $owner = User::factory()->create(['username' => 'pageignore']);
    insertFollow((int) $owner->id, (int) User::factory()->create()->id);

    DB::flushQueryLog();
    DB::enableQueryLog();

    $this->get('/@pageignore/artworks?page=2')
        ->assertOk()
        ->assertInertia(fn (AssertableInertia $page) => $page
            ->where('initialTab', 'artworks')
            ->where('followersListing', null));

    $paginatedQueries = collect(DB::getQueryLog())
        ->filter(fn (array $query): bool => profileSqlLooksLikePaginatedFollowers((string) $query['query']))
        ->values();

    expect($paginatedQueries)->toBeEmpty();

    DB::disableQueryLog();
});