<?php

declare(strict_types=1);

namespace App\Http\Controllers;

use App\Models\DocumentoCartella;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class DocumentoCartellaController extends Controller
{
    public function store(Request $request): JsonResponse
    {
        $this->authorizeWrite('documenti');

        $data = $request->validate([
            'nome' => 'required|string|max:255',
            'parent_id' => 'nullable|integer|exists:documenti_cartelle,id',
        ]);

        $cartella = DocumentoCartella::create([
            'nome' => $data['nome'],
            'parent_id' => $data['parent_id'] ?? null,
        ]);

        return response()->json([
            'success' => true,
            'cartella' => $cartella,
        ]);
    }

    public function update(Request $request, int $id): JsonResponse
    {
        $this->authorizeWrite('documenti');

        $cartella = DocumentoCartella::findOrFail($id);

        $data = $request->validate([
            'nome' => 'required|string|max:255',
            'parent_id' => 'nullable|integer|exists:documenti_cartelle,id',
        ]);

        $updateData = ['nome' => $data['nome']];

        if (array_key_exists('parent_id', $data)) {
            if ((int) $data['parent_id'] === $id) {
                return response()->json(['success' => false, 'message' => 'Una cartella non può essere spostata dentro se stessa.'], 422);
            }
            $updateData['parent_id'] = $data['parent_id'];
        }

        $cartella->update($updateData);

        return response()->json(['success' => true]);
    }

    public function destroy(int $id): JsonResponse
    {
        $this->authorizeDelete('documenti');

        $cartella = DocumentoCartella::findOrFail($id);

        $documentCount = $cartella->documenti()->count();
        if ($documentCount > 0) {
            return response()->json([
                'success' => false,
                'message' => "Impossibile eliminare: {$documentCount} documento(i) presenti nella cartella. Sposta o elimina prima i documenti.",
            ], 409);
        }

        $childrenCount = $cartella->children()->count();
        if ($childrenCount > 0) {
            return response()->json([
                'success' => false,
                'message' => "Impossibile eliminare: {$childrenCount} sottocartella(e) presenti. Elimina prima le sottocartelle.",
            ], 409);
        }

        $cartella->delete();

        return response()->json(['success' => true]);
    }

    public function breadcrumb(int $id): JsonResponse
    {
        $cartella = DocumentoCartella::with('parent')->findOrFail($id);
        $ancestors = $cartella->ancestors();

        $items = [];
        $items[] = ['id' => null, 'nome' => 'Tutti i documenti'];

        foreach ($ancestors as $anc) {
            $items[] = ['id' => $anc->id, 'nome' => $anc->nome];
        }

        $items[] = ['id' => $cartella->id, 'nome' => $cartella->nome];

        return response()->json(['items' => $items]);
    }
}