<?php

namespace App\Services\ItemMaster;

use App\Models\ItemMaster\ItemSection;
use App\Services\Service;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

class ItemSectionService extends Service
{
    /**
     * 섹션 생성
     */
    public function store(int $pageId, array $data): ItemSection
    {
        $tenantId = $this->tenantId();
        $userId = $this->apiUserId();

        // order_no 자동 계산 (해당 페이지의 마지막 섹션 + 1)
        $maxOrder = ItemSection::where('tenant_id', $tenantId)
            ->where('page_id', $pageId)
            ->max('order_no');

        $section = ItemSection::create([
            'tenant_id' => $tenantId,
            'page_id' => $pageId,
            'title' => $data['title'],
            'type' => $data['type'],
            'order_no' => ($maxOrder ?? -1) + 1,
            'created_by' => $userId,
        ]);

        $section->load(['fields', 'bomItems']);

        return $section;
    }

    /**
     * 섹션 수정
     */
    public function update(int $id, array $data): ItemSection
    {
        $tenantId = $this->tenantId();
        $userId = $this->apiUserId();

        $section = ItemSection::where('tenant_id', $tenantId)
            ->where('id', $id)
            ->first();

        if (! $section) {
            throw new NotFoundHttpException(__('error.not_found'));
        }

        $section->update([
            'title' => $data['title'] ?? $section->title,
            'updated_by' => $userId,
        ]);

        $section->load(['fields', 'bomItems']);

        return $section;
    }

    /**
     * 섹션 삭제 (Soft Delete)
     */
    public function destroy(int $id): void
    {
        $tenantId = $this->tenantId();
        $userId = $this->apiUserId();

        $section = ItemSection::where('tenant_id', $tenantId)
            ->where('id', $id)
            ->first();

        if (! $section) {
            throw new NotFoundHttpException(__('error.not_found'));
        }

        $section->update(['deleted_by' => $userId]);
        $section->delete();

        // Cascade: 하위 필드도 Soft Delete
        foreach ($section->fields as $field) {
            $field->update(['deleted_by' => $userId]);
            $field->delete();
        }

        foreach ($section->bomItems as $bomItem) {
            $bomItem->update(['deleted_by' => $userId]);
            $bomItem->delete();
        }
    }

    /**
     * 섹션 순서 변경
     *
     * @param  array  $items  [['id' => 1, 'order_no' => 0], ['id' => 2, 'order_no' => 1], ...]
     */
    public function reorder(int $pageId, array $items): void
    {
        $tenantId = $this->tenantId();
        $userId = $this->apiUserId();

        foreach ($items as $item) {
            ItemSection::where('tenant_id', $tenantId)
                ->where('page_id', $pageId)
                ->where('id', $item['id'])
                ->update([
                    'order_no' => $item['order_no'],
                    'updated_by' => $userId,
                ]);
        }
    }
}