<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Http\Resources\ArtworkResource;
use App\Models\Artwork;
use Illuminate\Http\JsonResponse;
use Illuminate\Support\Str;

class ArtworkNavigationController extends Controller
{
    /**
     * GET /api/artworks/navigation/{id}
     *
     * Returns prev/next published artworks by the same author.
     */
    public function neighbors(int $id): JsonResponse
    {
        $artwork = Artwork::published()
            ->select(['id', 'user_id', 'title', 'slug'])
            ->find($id);

        if (! $artwork) {
            return response()->json([
                'prev_id'   => null, 'next_id'   => null,
                'prev_url'  => null, 'next_url'  => null,
                'prev_slug' => null, 'next_slug' => null,
            ]);
        }

        $scope = Artwork::published()
            ->select(['id', 'title', 'slug'])
            ->where('user_id', $artwork->user_id);

        $prev = (clone $scope)->where('id', '<', $id)->orderByDesc('id')->first();
        $next = (clone $scope)->where('id', '>', $id)->orderBy('id')->first();

        // Infinite loop: wrap around when reaching the first or last artwork
        if (! $prev) {
            $prev = (clone $scope)->where('id', '!=', $id)->orderByDesc('id')->first();
        }
        if (! $next) {
            $next = (clone $scope)->where('id', '!=', $id)->orderBy('id')->first();
        }

        $prevSlug = $prev ? (Str::slug($prev->slug ?: $prev->title) ?: (string) $prev->id) : null;
        $nextSlug = $next ? (Str::slug($next->slug ?: $next->title) ?: (string) $next->id) : null;

        return response()->json([
            'prev_id'   => $prev?->id,
            'next_id'   => $next?->id,
            'prev_url'  => $prev ? url('/art/' . $prev->id . '/' . $prevSlug) : null,
            'next_url'  => $next ? url('/art/' . $next->id . '/' . $nextSlug) : null,
            'prev_slug' => $prevSlug,
            'next_slug' => $nextSlug,
        ]);
    }

    /**
     * GET /api/artworks/{id}/page
     *
     * Returns full artwork resource by numeric ID for client-side (no-reload) navigation.
     */
    public function pageData(int $id): JsonResponse
    {
        $artwork = Artwork::with(['user.profile', 'categories.contentType', 'categories.parent.contentType', 'tags', 'stats'])
            ->published()
            ->find($id);

        if (! $artwork) {
            return response()->json(['error' => 'Not found'], 404);
        }

        $resource = (new ArtworkResource($artwork))->toArray(request());

        return response()->json($resource);
    }
}