<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Models\Dictionary\District;
use App\Services\Export\ExportDistrictsService;
use App\Services\Import\ImportDistrictsService;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;
use Illuminate\View\View;

class AdminDistrictController extends Controller
{
    protected string $id = 'admin_districts';
    protected array $header = [
        'id' => 'ID',
        'shortname' => 'Сокращение',
        'name' => 'Название',
        'areas_count' => 'Районов',
        'actions' => '',
    ];
    protected array $searchFields = ['shortname', 'name'];

    public function index(Request $request): View
    {
        $allowedSortFields = ['id', 'shortname', 'name', 'areas_count'];
        $sortBy = in_array($request->get('sortBy'), $allowedSortFields, true) ? $request->get('sortBy') : 'id';
        $orderBy = $request->get('order') === 'desc' ? 'desc' : 'asc';

        $districts = District::query()->withCount('areas');

        if ($request->filled('s')) {
            $search = $request->get('s');
            $districts->where(function ($query) use ($search) {
                $query->where('shortname', 'like', '%' . $search . '%')
                    ->orWhere('name', 'like', '%' . $search . '%');
            });
        }

        $districts = $districts
            ->orderBy($sortBy, $orderBy)
            ->get();

        return view('admin.districts.index', [
            'active' => 'admin_districts',
            'id' => $this->id,
            'header' => $this->header,
            'sortBy' => $sortBy,
            'orderBy' => $orderBy,
            'searchFields' => $this->searchFields,
            'districts' => $districts,
        ]);
    }

    public function show(int $districtId): View
    {
        $district = District::withTrashed()->findOrFail($districtId);

        return view('admin.districts.edit', [
            'active' => 'admin_districts',
            'district' => $district,
        ]);
    }

    public function store(Request $request): RedirectResponse
    {
        $validated = $request->validate([
            'id' => ['nullable', 'integer'],
            'shortname' => ['required', 'string', 'max:50'],
            'name' => ['required', 'string', 'max:255'],
        ]);

        if (!empty($validated['id'])) {
            $district = District::withTrashed()->findOrFail($validated['id']);
            $district->update([
                'shortname' => $validated['shortname'],
                'name' => $validated['name'],
            ]);
        } else {
            District::create([
                'shortname' => $validated['shortname'],
                'name' => $validated['name'],
            ]);
        }

        return redirect()->route('admin.district.index')->with('success', 'Округ сохранён');
    }

    public function destroy(District $district): RedirectResponse
    {
        if ($district->areas()->count() > 0) {
            return redirect()->route('admin.district.index')
                ->with('error', 'Невозможно удалить округ с привязанными районами');
        }

        $district->delete();

        return redirect()->route('admin.district.index')->with('success', 'Округ удалён');
    }

    public function undelete(int $districtId): RedirectResponse
    {
        $district = District::withTrashed()->findOrFail($districtId);
        $district->restore();

        return redirect()->route('admin.district.index')->with('success', 'Округ восстановлен');
    }

    public function export(Request $request): RedirectResponse
    {
        $service = new ExportDistrictsService();
        $link = $service->handle($request->user()->id);

        return redirect()->away($link);
    }

    public function import(Request $request): RedirectResponse
    {
        $request->validate([
            'import_file' => ['required', 'file', 'mimes:xlsx,xls'],
        ]);

        $file = $request->file('import_file');
        $path = $file->store('import/districts', 'upload');
        $fullPath = Storage::disk('upload')->path($path);

        $service = new ImportDistrictsService($fullPath, $request->user()->id);
        $result = $service->handle();

        if ($result['success']) {
            return redirect()->route('admin.district.index')
                ->with('success', 'Импорт завершён успешно');
        }

        return redirect()->route('admin.district.index')
            ->with('error', 'Ошибка импорта: ' . ($result['error'] ?? 'неизвестная ошибка'));
    }
}