<?php

declare(strict_types=1);

namespace App\Http\Resources\PublicApi;

use App\Models\Media;
use App\Models\Project;
use App\Support\ImagePayload;
use App\Support\SiteUrls;
use App\Support\TranslatablePayload;
use Illuminate\Http\Request;
use Illuminate\Http\Resources\Json\JsonResource;

/**
 * @mixin Project
 */
class PublicProjectResource extends JsonResource
{
    /**
     * Whether to include the long-form fields. Listings stay light; the detail
     * endpoint opts in.
     */
    protected bool $detailed = false;

    public function detailed(bool $detailed = true): static
    {
        $this->detailed = $detailed;

        return $this;
    }

    /**
     * @return array<string, mixed>
     */
    public function toArray(Request $request): array
    {
        $locale = app()->getLocale();

        $summary = TranslatablePayload::resolve($this->resource, ['title', 'slug', 'tagline'], $locale);

        return [
            'id' => $this->id,
            'locale' => $locale,

            ...$summary,

            'status' => $this->status->value,
            'is_featured' => $this->is_featured,

            // True when flagged directly, or when the project carries an open
            // call. Read from a count rather than the relation so a listing
            // does not trigger a query per project.
            'needs_help' => $this->needs_help || $this->openCallCount() > 0,
            // A full image object rather than a path: the frontend needs
            // width and height to reserve the box, a srcset so a phone does
            // not download the original, and the alt text to be accessible.
            'cover_image' => ImagePayload::make(
                $this->cover_image,
                $this->loadedMedia('coverMedia'),
                $this->getTranslation('cover_image_alt', $locale, false) ?: null,
            ),
            'demo_url' => $this->demo_url,

            // Who the work is for. Central to a non-profit collective's story
            // in a way it never is for a commercial portfolio — and now a
            // record of its own, so the same organisation is the same thing on
            // every project it appears in.
            'client' => PublicClientResource::make($this->whenLoaded('client')),

            'started_at' => $this->started_at?->toDateString(),
            'ended_at' => $this->ended_at?->toDateString(),
            'published_at' => $this->published_at?->toIso8601String(),
            'unpublish_at' => $this->unpublish_at?->toIso8601String(),
            'updated_at' => $this->updated_at?->toIso8601String(),

            // The long form: the decisions and the postmortem are the content
            // other developers actually read, so they are never truncated.
            $this->mergeWhen($this->detailed, fn () => TranslatablePayload::resolve(
                $this->resource,
                ['description', 'decisions', 'postmortem', 'meta_title', 'meta_description'],
                $locale,
            )),

            // Only on the detail endpoint: a listing showing twenty projects
            // has no use for every screenshot of each one.
            'gallery' => $this->when(
                $this->detailed && $this->resource->relationLoaded('images'),
                fn () => $this->images->map(fn ($image) => [
                    ...ImagePayload::make(
                        $image->path,
                        $image->relationLoaded('media') ? $image->media : null,
                        $image->getTranslation('alt', $locale, false) ?: null,
                    ),

                    // Shown to everyone, unlike the alt text.
                    'caption' => $image->getTranslation('caption', $locale, false) ?: null,
                ])->all(),
            ),

            'technologies' => PublicTechnologyResource::collection($this->whenLoaded('technologies')),
            'services' => PublicServiceResource::collection($this->whenLoaded('services')),
            'testimonials' => PublicTestimonialResource::collection($this->whenLoaded('testimonials')),
            'talks' => PublicTalkResource::collection($this->whenLoaded('talks')),
            'members' => PublicMemberResource::collection($this->whenLoaded('members')),
            'lead' => PublicMemberResource::make($this->whenLoaded('lead')),
            'calls' => PublicCallResource::collection($this->whenLoaded('calls')),

            // Live repository activity — the part that keeps the site looking
            // alive without anyone maintaining it.
            'repositories' => PublicRepositoryResource::collection($this->whenLoaded('repositories')),

            'alternates' => SiteUrls::alternates($this->resource, 'project'),
            'path' => SiteUrls::alternates($this->resource, 'project')[$locale] ?? null,
        ];
    }

    /**
     * The media row when the caller loaded it, and null otherwise — never a
     * lazy load, because this runs once per row in a listing.
     */
    protected function loadedMedia(string $relation): ?Media
    {
        return $this->resource->relationLoaded($relation)
            ? $this->resource->getRelation($relation)
            : null;
    }

    /**
     * Open calls attached to this project, from whichever source the caller
     * already loaded — never by lazy-loading the relation.
     */
    protected function openCallCount(): int
    {
        if ($this->resource->relationLoaded('calls')) {
            return $this->calls->count();
        }

        return (int) ($this->resource->open_calls_count ?? 0);
    }
}