<?php

namespace App\Http\Controllers;

use App\Enums\SourceStatus;
use App\Models\Releve;
use App\Models\Source;
use App\Services\GedcomExportService;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Illuminate\Support\Facades\DB;

class ExportController extends Controller
{
    public function __construct(
        private readonly GedcomExportService $gedcom,
    ) {}

    /** Export de tous les relevés d'une source */
    public function source(Source $source): Response
    {
        $this->authorize('view', $source);

        $gedcomContent = $this->gedcom->exportSource($source);
        $filename = $this->sanitizeFilename($source->nom) . '.ged';

        return response($gedcomContent, 200, [
            'Content-Type'        => 'text/plain; charset=UTF-8',
            'Content-Disposition' => "attachment; filename=\"{$filename}\"",
        ]);
    }

    /** Export depuis les résultats de recherche (avec les mêmes filtres) */
    public function recherche(Request $request): Response
    {
        $user = auth()->user();

        $query = Releve::with(['source.sourceType', 'createur'])
            ->whereHas('source', function ($q) use ($user, $request) {
                if (! $user->isSectionManager()) {
                    $assignedIds = $user->sourcesAssignees()->pluck('sources.id');
                    $q->where(function ($sq) use ($assignedIds) {
                        $sq->where('status', SourceStatus::Termine)
                           ->orWhereIn('id', $assignedIds);
                    });
                }
                if ($request->filled('source_type_id')) {
                    $q->where('source_type_id', $request->integer('source_type_id'));
                }
            }); // $request déjà dans le use()

        if ($request->filled('q')) {
            $q = trim($request->get('q'));
            $query->where(function ($wq) use ($q) {
                $wq->where('nom',    'ilike', "%{$q}%")
                   ->orWhere('prenom','ilike', "%{$q}%")
                   ->orWhere('date_evenement', 'ilike', "%{$q}%")
                   ->orWhereRaw(
                       "to_tsvector('french', data::text) @@ plainto_tsquery('french', ?)",
                       [$q]
                   );
            });
        }

        if ($request->filled('lieu_id')) {
            $rows = DB::select("
                WITH RECURSIVE descendants AS (
                    SELECT id, nom FROM lieux WHERE id = ?
                    UNION ALL
                    SELECT l.id, l.nom FROM lieux l
                    INNER JOIN descendants d ON l.lieu_parent_id = d.id
                )
                SELECT DISTINCT nom FROM descendants WHERE nom IS NOT NULL
            ", [$request->integer('lieu_id')]);

            $noms = collect($rows)->pluck('nom')->filter();
            if ($noms->isNotEmpty()) {
                $pattern = $noms->map(fn ($n) => preg_quote($n, '/'))->join('|');
                $query->whereRaw("data::text ~* ?", [$pattern]);
            }
        }

        if ($request->filled('annee_debut')) {
            $query->whereRaw('date_evenement >= ?', [$request->integer('annee_debut') . '-01-01']);
        }
        if ($request->filled('annee_fin')) {
            $query->whereRaw('date_evenement <= ?', [$request->integer('annee_fin') . '-12-31']);
        }

        $releves = $query->orderByRaw('nom ASC NULLS LAST')->get();

        if ($releves->isEmpty()) {
            return back()->with('error', 'Aucun relevé à exporter.');
        }

        $titre = $request->filled('q') ? 'Recherche_' . $request->get('q') : 'Export';
        $gedcomContent = $this->gedcom->exportReleves($releves, $titre);
        $filename = $this->sanitizeFilename($titre) . '.ged';

        return response($gedcomContent, 200, [
            'Content-Type'        => 'text/plain; charset=UTF-8',
            'Content-Disposition' => "attachment; filename=\"{$filename}\"",
        ]);
    }

    private function sanitizeFilename(string $name): string
    {
        $name = iconv('UTF-8', 'ASCII//TRANSLIT', $name) ?: $name;
        return preg_replace('/[^a-zA-Z0-9_-]/', '_', $name);
    }
}