<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Http\Resources\YogaPoseResource;
use App\Models\YogaCategory;
use App\Models\YogaPose;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class YogaPoseController extends Controller
{
    public function index(Request $request): JsonResponse
    {
        $q = trim((string) $request->query('q', ''));
        $category = (int) $request->query('category', 0);
        $benefit = trim((string) $request->query('benefit', ''));
        $perPage = (int) $request->query('per_page', 12);
        if ($perPage < 6 || $perPage > 60) { $perPage = 12; }

        $query = YogaPose::query()->with('category')
            ->when($q !== '', function ($qb) use ($q) {
                $qb->where(function ($sub) use ($q) {
                    $sub->where('english_name', 'like', "%{$q}%")
                        ->orWhere('sanskrit_name', 'like', "%{$q}%")
                        ->orWhere('sanskrit_name_adapted', 'like', "%{$q}%");
                });
            })
            ->when($category > 0, fn ($qb) => $qb->where('category_id', $category))
            ->when($benefit !== '', fn ($qb) => $qb->where('benefits', 'like', "%{$benefit}%"))
            ->orderBy('english_name');

        $poses = $query->paginate($perPage)->withQueryString();

        return response()->json([
            'data' => YogaPoseResource::collection($poses->items()),
            'meta' => [
                'current_page' => $poses->currentPage(),
                'last_page' => $poses->lastPage(),
                'per_page' => $poses->perPage(),
                'total' => $poses->total(),
            ],
            'categories' => YogaCategory::orderBy('name')->get(['id', 'name']),
        ]);
    }

    public function show(YogaPose $pose): JsonResponse
    {
        $pose->load('category');

        $benefits = (string) $pose->benefits;
        $tokens = collect(preg_split('/[^\p{L}]+/u', mb_strtolower($benefits)))
            ->filter(fn ($t) => $t !== null && $t !== '' && mb_strlen($t) >= 4)
            ->unique()
            ->take(8)
            ->values()
            ->all();

        $similarPoses = YogaPose::query()
            ->with('category')
            ->where('id', '!=', $pose->id)
            ->where(function ($q) use ($pose, $tokens) {
                if ($pose->category_id) {
                    $q->orWhere('category_id', $pose->category_id);
                }
                foreach ($tokens as $tk) {
                    $q->orWhere('benefits', 'like', "%{$tk}%");
                }
            })
            ->orderBy('english_name')
            ->limit(9)
            ->get();

        return response()->json([
            'pose' => new YogaPoseResource($pose),
            'similar_poses' => YogaPoseResource::collection($similarPoses),
        ]);
    }
}