<?php

namespace App\Http\Controllers;

use App\Http\Requests\ShipSparePartOrderRequest;
use App\Http\Requests\StoreSparePartOrderRequest;
use App\Models\SparePart;
use App\Models\SparePartOrder;
use App\Models\SparePartOrdersView;
use App\Services\SparePartIssueService;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;

class SparePartOrderController extends Controller
{
    protected array $data = [
        'active' => 'spare_parts',
        'title' => 'Заказы деталей',
        'id' => 'spare_part_orders',
        'header' => [
            'id' => 'ID',
            'year' => 'Год',
            'article' => 'Артикул',
            'source_text' => 'Источник заказа',
            'status' => 'Статус',
            'ordered_quantity' => 'Заказано',
            'available_qty' => 'Остаток',
            'with_documents' => 'С документами',
            'note' => 'Примечание',
            'user_name' => 'Менеджер',
            'created_at' => 'Дата создания',
        ],
        'searchFields' => [
            'article',
            'source_text',
            'note',
            'user_name',
        ],
        'routeName' => 'spare_part_orders.show',
    ];

    public function __construct(
        protected SparePartIssueService $issueService
    ) {}

    public function index(Request $request)
    {
        session(['gp_spare_part_orders' => $request->query()]);
        $model = new SparePartOrdersView();

        // Фильтры
        $this->createFilters($model, 'year', 'article', 'status', 'with_documents');
        $this->createRangeFilters($model, 'ordered_quantity', 'available_qty');
        $this->createDateFilters($model, 'created_at');

        // Запрос
        $q = $model::query();

        // Специальная обработка фильтров из клика по каталогу
        if ($request->has('spare_part_id')) {
            $sparePart = SparePart::find($request->get('spare_part_id'));
            if ($sparePart) {
                $q->where('spare_part_id', $sparePart->id);
                $this->data['filter_spare_part'] = $sparePart;
            }
        }

        if ($request->has('with_documents')) {
            $withDocs = filter_var($request->get('with_documents'), FILTER_VALIDATE_BOOLEAN);
            $q->where('with_documents', $withDocs);
        }

        if ($request->has('status')) {
            $q->where('status', $request->get('status'));
        }

        if ($request->has('available_qty_min')) {
            $q->where('available_qty', '>=', $request->get('available_qty_min'));
        }

        $this->acceptFilters($q, $request);
        $this->acceptSearch($q, $request);

        $this->setSortAndOrderBy($model, $request);
        $q->orderBy($this->data['sortBy'], $this->data['orderBy']);

        $this->data['spare_part_orders'] = $q->paginate(session('per_page', config('pagination.per_page')))->withQueryString();
        $this->data['strings'] = $this->data['spare_part_orders'];
        $this->data['tab'] = 'orders';

        return view('spare_parts.index', $this->data);
    }

    public function show(Request $request, SparePartOrder $sparePartOrder)
    {
        $this->data['previous_url'] = $request->get('previous_url');
        $this->data['spare_part_order'] = $sparePartOrder->load([
            'sparePart',
            'movements.user',
            'reservations.reclamation',
        ]);
        $this->data['spare_parts'] = SparePart::orderBy('article')->get();
        return view('spare_part_orders.edit', $this->data);
    }

    public function create()
    {
        $this->data['spare_part_order'] = null;
        $this->data['spare_parts'] = SparePart::orderBy('article')->get();
        return view('spare_part_orders.edit', $this->data);
    }

    public function store(StoreSparePartOrderRequest $request): RedirectResponse
    {
        $data = $request->validated();
        $data['user_id'] = auth()->id();

        // Observer автоматически обработает дефициты при создании партии со статусом in_stock
        SparePartOrder::create($data);

        $previous_url = $request->get('previous_url') ?? route('spare_part_orders.index', session('gp_spare_part_orders'));
        return redirect()->to($previous_url)->with(['success' => 'Заказ детали успешно создан!']);
    }

    public function update(StoreSparePartOrderRequest $request, SparePartOrder $sparePartOrder): RedirectResponse
    {
        // Observer автоматически обработает дефициты при смене статуса на in_stock
        $sparePartOrder->update($request->validated());

        $previous_url = $request->get('previous_url') ?? route('spare_part_orders.index', session('gp_spare_part_orders'));
        return redirect()->to($previous_url)->with(['success' => 'Заказ детали успешно обновлён!']);
    }

    public function destroy(SparePartOrder $sparePartOrder): RedirectResponse
    {
        // Проверяем, есть ли активные резервы
        if ($sparePartOrder->reservations()->where('status', 'active')->exists()) {
            return redirect()->route('spare_part_orders.show', $sparePartOrder)
                ->with(['error' => 'Невозможно удалить заказ с активными резервами!']);
        }

        $sparePartOrder->delete();

        return redirect()->route('spare_part_orders.index', session('gp_spare_part_orders'))
            ->with(['success' => 'Заказ детали успешно удалён!']);
    }

    /**
     * Прямое списание (отгрузка) без резерва
     */
    public function ship(ShipSparePartOrderRequest $request, SparePartOrder $sparePartOrder): RedirectResponse
    {
        $validated = $request->validated();

        try {
            $this->issueService->directIssue(
                $sparePartOrder,
                $validated['quantity'],
                $validated['note']
            );

            return redirect()->route('spare_part_orders.show', $sparePartOrder)
                ->with(['success' => 'Отгрузка успешно выполнена!']);
        } catch (\InvalidArgumentException $e) {
            return redirect()->route('spare_part_orders.show', $sparePartOrder)
                ->with(['error' => $e->getMessage()]);
        }
    }

    /**
     * Изменить статус на "На складе"
     */
    public function setInStock(SparePartOrder $sparePartOrder): RedirectResponse
    {
        // Observer автоматически обработает дефициты при смене статуса
        $sparePartOrder->update(['status' => SparePartOrder::STATUS_IN_STOCK]);

        return redirect()->route('spare_part_orders.show', $sparePartOrder)
            ->with(['success' => 'Статус изменён на "На складе"!']);
    }

    /**
     * Коррекция остатка (инвентаризация)
     */
    public function correct(Request $request, SparePartOrder $sparePartOrder): RedirectResponse
    {
        $validated = $request->validate([
            'new_quantity' => 'required|integer|min:0',
            'reason' => 'required|string|max:500',
        ]);

        try {
            $this->issueService->correctInventory(
                $sparePartOrder,
                $validated['new_quantity'],
                $validated['reason']
            );

            return redirect()->route('spare_part_orders.show', $sparePartOrder)
                ->with(['success' => 'Коррекция выполнена!']);
        } catch (\InvalidArgumentException $e) {
            return redirect()->route('spare_part_orders.show', $sparePartOrder)
                ->with(['error' => $e->getMessage()]);
        }
    }
}