<?php

declare(strict_types=1);

namespace App\Services;

use App\Enums\ProductionOrderActivityType;
use App\Enums\ProductionOrderSource;
use App\Models\ProductionOrder;
use App\Models\User;
use Illuminate\Support\Arr;
use Illuminate\Support\Facades\DB;

class ProductionOrderService
{
    public function __construct(
        private readonly ProductionCalendarService $calendar,
    ) {}

    /** @param array<string, mixed> $data */
    public function create(array $data, User $actor): ProductionOrder
    {
        return DB::transaction(function () use ($data, $actor): ProductionOrder {
            $items = Arr::pull($data, 'items', []);
            unset($data['nav']);

            $data['source'] = ProductionOrderSource::Manual;
            $data['contract_shipment_date'] = $this->contractShipmentDate($data);
            $data['created_by'] = $actor->id;
            $data['updated_by'] = $actor->id;

            $order = ProductionOrder::query()->create($data);
            $this->syncItems($order, $items, $actor);

            return $order->load(['manager', 'items.catalogItem']);
        });
    }

    /** @param array<string, mixed> $data */
    public function update(
        ProductionOrder $order,
        array $data,
        User $actor,
        bool $syncItems,
        array $editableItemFields = [],
    ): ProductionOrder {
        return DB::transaction(function () use (
            $order,
            $data,
            $actor,
            $syncItems,
            $editableItemFields,
        ): ProductionOrder {
            $items = Arr::pull($data, 'items', null);
            unset($data['nav']);

            if (array_key_exists('payment_date', $data) || array_key_exists('supply_working_days', $data)) {
                $data['contract_shipment_date'] = $this->contractShipmentDate([
                    'payment_date' => $data['payment_date'] ?? $order->payment_date,
                    'supply_working_days' => $data['supply_working_days'] ?? $order->supply_working_days,
                ]);
            }
            $data['updated_by'] = $actor->id;
            $order->update($data);

            if ($order->wasChanged('status')) {
                $order->activities()->create([
                    'type' => ProductionOrderActivityType::StatusChanged,
                    'user_id' => $actor->id,
                    'message' => 'Изменён статус заказа.',
                ]);
            }

            if ($syncItems && is_array($items)) {
                $this->syncItems($order, $items, $actor);
            } elseif (is_array($items) && $editableItemFields !== []) {
                $this->updateItemDetails($order, $items, $editableItemFields);
            }

            return $order->refresh()->load(['manager', 'items.catalogItem']);
        });
    }

    /**
     * @param  array<int, array<string, mixed>>  $items
     * @param  array<int, string>  $editableFields
     */
    private function updateItemDetails(ProductionOrder $order, array $items, array $editableFields): void
    {
        foreach ($items as $itemData) {
            $id = isset($itemData['id']) ? (int) $itemData['id'] : 0;
            if ($id < 1) {
                continue;
            }

            $order->items()->whereKey($id)->firstOrFail()->update(
                Arr::only($itemData, $editableFields),
            );
        }
    }

    /**
     * @param  array<int, array<string, mixed>>  $items
     */
    private function syncItems(ProductionOrder $order, array $items, User $actor): void
    {
        $keptIds = [];
        foreach (array_values($items) as $sort => $itemData) {
            $id = isset($itemData['id']) ? (int) $itemData['id'] : null;
            $payload = Arr::only($itemData, [
                'common_catalog_item_id',
                'order_item_number',
                'factory_number',
                'manufacture_date',
            ]);
            $payload['sort'] = $sort;

            if ($id !== null && $id > 0) {
                $item = $order->items()->whereKey($id)->firstOrFail();
                $item->update($payload);
            } else {
                $item = $order->items()->create($payload + ['created_by' => $actor->id]);
            }
            $keptIds[] = $item->id;
        }

        $order->items()->whereNotIn('id', $keptIds)->delete();
    }

    /** @param array<string, mixed> $data */
    private function contractShipmentDate(array $data): string
    {
        return $this->calendar
            ->addWorkingDays((string) $data['payment_date'], (int) $data['supply_working_days'])
            ->toDateString();
    }
}