<?php

namespace App\Http\Controllers\Api\V1;

use App\Http\Controllers\Controller;
use App\Models\InvestmentLegalSource;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class LegislationSourceController extends Controller
{
    public function index(Request $request): JsonResponse
    {
        $filters = $request->validate([
            'q' => ['nullable', 'string', 'max:100'],
            'page' => ['nullable', 'integer', 'min:1'],
            'per_page' => ['nullable', 'integer', 'min:1', 'max:100'],
        ]);

        $today = today()->toDateString();
        $query = InvestmentLegalSource::query()
            ->where('validation_status', 'validated')
            ->whereDate('valid_from', '<=', $today)
            ->where(fn ($query) => $query->whereNull('valid_until')->orWhereDate('valid_until', '>=', $today));

        if (! empty($filters['q'])) {
            $term = '%'.addcslashes($filters['q'], '%_\\').'%';
            $query->where(fn ($query) => $query
                ->whereRaw('title ILIKE ?', [$term])
                ->orWhereRaw('diploma ILIKE ?', [$term])
                ->orWhereRaw('article ILIKE ?', [$term])
                ->orWhereRaw('competent_entity ILIKE ?', [$term]));
        }

        $page = $query->orderBy('title')->orderBy('id')->paginate($filters['per_page'] ?? 25)->withQueryString();
        $data = collect($page->items())->map(fn (InvestmentLegalSource $source): array => [
            'id' => $source->id,
            'title' => $source->title,
            'url' => $source->url,
            'diploma' => $source->diploma,
            'article' => $source->article,
            'competent_entity' => $source->competent_entity,
            'validation_status' => $source->validation_status,
            'version_no' => (int) $source->version_no,
            'valid_from' => $source->valid_from,
            'valid_until' => $source->valid_until,
            'validator_id' => $source->validator_id === null ? null : (int) $source->validator_id,
            'validated_at' => $source->validated_at,
        ])->values();
        $body = [
            'data' => $data,
            'meta' => [
                'current_page' => $page->currentPage(),
                'per_page' => $page->perPage(),
                'total' => $page->total(),
            ],
        ];
        $etag = 'W/"legal-sources-'.hash('sha256', json_encode([
            'filters' => $filters,
            'data' => $data,
            'total' => $page->total(),
        ], JSON_THROW_ON_ERROR)).'"';

        return response()->json($body)
            ->header('ETag', $etag)
            ->header('Cache-Control', 'public, max-age=300');
    }
}