<?php

declare(strict_types=1);

use App\Enums\ReactionType;
use App\Models\Artwork;
use App\Models\ArtworkComment;
use App\Models\CommentReaction;
use App\Models\User;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\DB;

uses(RefreshDatabase::class);

function m18b1ArtworkCommentTree(int $topLevelCount = 2): array
{
    $artwork = Artwork::factory()->create();
    $author = User::factory()->create();
    $viewer = User::factory()->create();
    $other = User::factory()->create();
    $comments = [];

    for ($i = 0; $i < $topLevelCount; $i++) {
        $comment = ArtworkComment::factory()->create([
            'artwork_id' => $artwork->id,
            'user_id' => $author->id,
            'parent_id' => null,
        ]);
        $reply = ArtworkComment::factory()->create([
            'artwork_id' => $artwork->id,
            'user_id' => $other->id,
            'parent_id' => $comment->id,
        ]);

        CommentReaction::create([
            'comment_id' => $comment->id,
            'user_id' => $other->id,
            'reaction' => ReactionType::Heart->value,
        ]);
        CommentReaction::create([
            'comment_id' => $reply->id,
            'user_id' => $viewer->id,
            'reaction' => ReactionType::Fire->value,
        ]);
        CommentReaction::create([
            'comment_id' => $reply->id,
            'user_id' => $other->id,
            'reaction' => ReactionType::Clap->value,
        ]);

        $comments[] = [$comment, $reply];
    }

    return [$artwork, $viewer, $comments];
}

function m18b1ReactionQueryCount(array $queries): int
{
    return collect($queries)
        ->filter(fn (array $query): bool => str_contains(strtolower((string) $query['query']), 'comment_reactions'))
        ->count();
}

it('includes bulk reaction totals for guests with one reaction query', function (): void {
    [$artwork, , $comments] = m18b1ArtworkCommentTree();

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

    $response = $this->getJson("/api/artworks/{$artwork->id}/comments")->assertOk();
    $payload = $response->json('data');
    $withoutReactions = json_decode(json_encode($payload, JSON_THROW_ON_ERROR), true, 512, JSON_THROW_ON_ERROR);
    $stripReactions = function (array &$items) use (&$stripReactions): void {
        foreach ($items as &$item) {
            unset($item['reactions']);
            if (isset($item['replies']) && is_array($item['replies'])) {
                $stripReactions($item['replies']);
            }
        }
    };
    $stripReactions($withoutReactions);
    $commentCount = 0;
    $countComments = function (array $items) use (&$countComments, &$commentCount): void {
        foreach ($items as $item) {
            $commentCount++;
            if (isset($item['replies']) && is_array($item['replies'])) {
                $countComments($item['replies']);
            }
        }
    };
    $countComments($payload);

    fwrite(STDERR, sprintf(
        "M18B1 guest payload bytes: before=%d after=%d added=%d comments/replies=%d\n",
        strlen(json_encode($withoutReactions, JSON_THROW_ON_ERROR)),
        strlen(json_encode($payload, JSON_THROW_ON_ERROR)),
        strlen(json_encode($payload, JSON_THROW_ON_ERROR)) - strlen(json_encode($withoutReactions, JSON_THROW_ON_ERROR)),
        $commentCount,
    ));

    expect(m18b1ReactionQueryCount(DB::getQueryLog()))->toBe(1)
        ->and($payload[0])->toHaveKey('reactions')
        ->and($payload[0]['reactions'][ReactionType::Heart->value]['count'])->toBe(1)
        ->and($payload[0]['reactions'][ReactionType::Heart->value]['mine'])->toBeFalse()
        ->and($payload[0]['replies'][0]['reactions'][ReactionType::Fire->value]['count'])->toBe(1)
        ->and(count($comments))->toBe(2);

    DB::disableQueryLog();
});

it('includes viewer reaction state for comments and replies with one extra query', function (): void {
    [$artwork, $viewer] = m18b1ArtworkCommentTree();

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

    $response = $this->actingAs($viewer)
        ->getJson("/api/artworks/{$artwork->id}/comments")
        ->assertOk();
    $payload = $response->json('data');

    expect(m18b1ReactionQueryCount(DB::getQueryLog()))->toBe(2)
        ->and($payload[0]['reactions'][ReactionType::Heart->value]['mine'])->toBeFalse()
        ->and($payload[0]['replies'][0]['reactions'][ReactionType::Fire->value]['mine'])->toBeTrue();

    DB::disableQueryLog();
});

it('keeps reaction query count constant as the comment tree grows', function (): void {
    [$smallArtwork] = m18b1ArtworkCommentTree(2);
    [$largeArtwork] = m18b1ArtworkCommentTree(20);

    DB::enableQueryLog();

    DB::flushQueryLog();
    $this->getJson("/api/artworks/{$smallArtwork->id}/comments")->assertOk();
    $smallCount = m18b1ReactionQueryCount(DB::getQueryLog());

    DB::flushQueryLog();
    $this->getJson("/api/artworks/{$largeArtwork->id}/comments")->assertOk();
    $largeCount = m18b1ReactionQueryCount(DB::getQueryLog());

    DB::disableQueryLog();

    expect($smallCount)->toBe(1)->and($largeCount)->toBe(1);
});