<?php

namespace App\Http\Controllers\Api\V1;

use App\Helpers\ApiResponse;
use App\Http\Controllers\Controller;
use App\Models\Products\Product;
use App\Services\ProductBomService;
use Illuminate\Http\Request;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

/**
 * Items BOM Controller (ID-based)
 *
 * ID 기반으로 BOM을 관리하는 컨트롤러
 * 내부적으로 기존 ProductBomService 재사용
 */
class ItemsBomController extends Controller
{
    public function __construct(private ProductBomService $service) {}

    /**
     * GET /api/v1/items/{id}/bom
     * BOM 라인 목록 조회 (flat list)
     */
    public function index(int $id, Request $request)
    {
        return ApiResponse::handle(function () use ($id, $request) {
            $this->validateProductExists($id);

            return $this->service->index($id, $request->all());
        }, __('message.bom.fetch'));
    }

    /**
     * GET /api/v1/items/{id}/bom/tree
     * BOM 트리 구조 조회 (계층적)
     */
    public function tree(int $id, Request $request)
    {
        return ApiResponse::handle(function () use ($id, $request) {
            $this->validateProductExists($id);

            return $this->service->tree($request, $id);
        }, __('message.bom.fetch'));
    }

    /**
     * POST /api/v1/items/{id}/bom
     * BOM 라인 추가 (bulk upsert)
     */
    public function store(int $id, Request $request)
    {
        return ApiResponse::handle(function () use ($id, $request) {
            $this->validateProductExists($id);

            return $this->service->bulkUpsert($id, $request->input('items', []));
        }, __('message.bom.created'));
    }

    /**
     * PUT /api/v1/items/{id}/bom/{lineId}
     * BOM 라인 수정
     */
    public function update(int $id, int $lineId, Request $request)
    {
        return ApiResponse::handle(function () use ($id, $lineId, $request) {
            $this->validateProductExists($id);

            return $this->service->update($id, $lineId, $request->all());
        }, __('message.bom.updated'));
    }

    /**
     * DELETE /api/v1/items/{id}/bom/{lineId}
     * BOM 라인 삭제
     */
    public function destroy(int $id, int $lineId)
    {
        return ApiResponse::handle(function () use ($id, $lineId) {
            $this->validateProductExists($id);

            $this->service->destroy($id, $lineId);

            return 'success';
        }, __('message.bom.deleted'));
    }

    /**
     * GET /api/v1/items/{id}/bom/summary
     * BOM 요약 정보
     */
    public function summary(int $id)
    {
        return ApiResponse::handle(function () use ($id) {
            $this->validateProductExists($id);

            return $this->service->summary($id);
        }, __('message.bom.fetch'));
    }

    /**
     * GET /api/v1/items/{id}/bom/validate
     * BOM 유효성 검사
     */
    public function validate(int $id)
    {
        return ApiResponse::handle(function () use ($id) {
            $this->validateProductExists($id);

            return $this->service->validateBom($id);
        }, __('message.bom.fetch'));
    }

    /**
     * POST /api/v1/items/{id}/bom/replace
     * BOM 전체 교체
     */
    public function replace(int $id, Request $request)
    {
        return ApiResponse::handle(function () use ($id, $request) {
            $this->validateProductExists($id);

            return $this->service->replaceBom($id, $request->all());
        }, __('message.bom.created'));
    }

    /**
     * POST /api/v1/items/{id}/bom/reorder
     * BOM 정렬 변경
     */
    public function reorder(int $id, Request $request)
    {
        return ApiResponse::handle(function () use ($id, $request) {
            $this->validateProductExists($id);

            $this->service->reorder($id, $request->input('items', []));

            return 'success';
        }, __('message.bom.reordered'));
    }

    /**
     * GET /api/v1/items/{id}/bom/categories
     * 해당 품목의 BOM에서 사용 중인 카테고리 목록
     */
    public function listCategories(int $id)
    {
        return ApiResponse::handle(function () use ($id) {
            $this->validateProductExists($id);

            return $this->service->listCategoriesForProduct($id);
        }, __('message.bom.fetch'));
    }

    // ==================== Helper Methods ====================

    /**
     * 품목 ID로 tenant 소유권 검증
     *
     * @throws NotFoundHttpException
     */
    private function validateProductExists(int $id): void
    {
        $tenantId = app('tenant_id');

        $exists = Product::query()
            ->where('tenant_id', $tenantId)
            ->where('id', $id)
            ->exists();

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