<?php

namespace App\Http\Controllers\Admin\Product;

use App\Services\Admin\Product\AdminProductService;
use Illuminate\Http\Request;

final class AdminProductController
{
    public function __construct(
        private readonly AdminProductService $service,
    ) {}

    public function index(Request $request)
    {
        session(['product_list_url' => request()->fullUrl()]);

        $data = $this->service->list($request->all());
        return view('admin.product.products.index', $data);
    }

    public function create()
    {
        $data = $this->service->getFormData();
        return view('admin.product.products.create', $data);
    }

    public function store(Request $request)
    {
        $data = $this->validateProduct($request);

        $res = $this->service->storeProduct($data, (int)auth('admin')->id(), $request->ip(), $request->userAgent() ?? '');

        if (!$res['ok']) {
            return redirect()->back()->withInput()->with('toast', ['type' => 'danger', 'title' => '저장 실패', 'message' => $res['message']]);
        }
        return redirect()->route('admin.products.index')->with('toast', ['type' => 'success', 'title' => '완료', 'message' => $res['message']]);
    }

    private function validateProduct(Request $request): array
    {
        $methods = $request->input('payment_methods', []);
        if (!is_array($methods)) $methods = [];

        $card = $request->input('payment_card_method');
        if ($card !== null && $card !== '') {
            $methods[] = (int)$card;
        }

        $request->merge([
            'payment_methods'   => array_values(array_unique(array_map('intval', $methods))),
            'pin_check_methods' => array_values(array_unique((array)$request->input('pin_check_methods', []))),
        ]);

        return $request->validate([
            'category_id'        => ['required', 'integer'],
            'name'               => ['required', 'string', 'max:150'],
            'thumbnail_media_id' => ['nullable', 'integer'],
            'status'             => ['required', 'in:ACTIVE,HIDDEN,SOLD_OUT'],
            'product_type'       => ['required', 'in:ONLINE,DELIVERY'],
            'payment_methods'    => ['required', 'array', 'min:1'],
            'payment_methods.*'  => ['integer'],

            'pin_check_methods'    => ['required', 'array', 'min:1'],
            'pin_check_methods.*'  => ['string', 'in:PIN_INSTANT,SMS,BUYBACK'],

            'is_always_on_sale'  => ['required', 'in:0,1'],
            'sales_start_at'     => ['nullable', 'date'],
            'sales_end_at'       => ['nullable', 'date', 'after_or_equal:sales_start_at'],
            'purchase_type'      => ['required', 'in:SINGLE,MULTI_QTY,MULTI_SKU'],
            'min_buy_qty'        => ['required', 'integer', 'min:1'],
            'max_buy_qty'        => ['required', 'integer', 'min:0'],
            'max_buy_amount'     => ['required', 'integer', 'min:0'],
            'description'        => ['nullable', 'string'],
            'guide'              => ['nullable', 'string'],
            'warning'            => ['nullable', 'string'],

            // 다중 SKU 밸리데이션
            'skus'                    => ['required', 'array', 'min:1'],
            'skus.*.id'               => ['nullable', 'integer'],
            'skus.*.name'             => ['required', 'string', 'max:50'],
            'skus.*.tax_type'         => ['required', 'in:TAX,FREE'],
            'skus.*.face_value'       => ['required', 'integer', 'min:0'],
            'skus.*.discount_type'    => ['required', 'in:PERCENT,FIXED'],
            'skus.*.discount_value'   => ['required', 'integer', 'min:0'],
            'skus.*.sales_method'     => ['required', 'in:OWN_PIN,API_LINK'],
            'skus.*.api_provider_id'  => ['nullable', 'integer', 'required_if:skus.*.sales_method,API_LINK'],
            'skus.*.api_product_code' => ['nullable', 'string', 'max:50', 'required_if:skus.*.sales_method,API_LINK'],
            'skus.*.is_active'        => ['required', 'in:0,1'],

        ], [
            'payment_methods.required'            => '최소 1개 이상의 결제 수단을 선택해주세요.',
            'pin_check_methods.required'          => '핀번호 확인 방법을 최소 1개 이상 선택해주세요.',
            'skus.required'                       => '최소 1개 이상의 권종을 등록해야 합니다.',
            'skus.*.api_provider_id.required_if'  => 'API 연동 시 연동사를 선택해야 합니다.',
            'skus.*.api_product_code.required_if' => 'API 연동 시 상품 코드를 선택해야 합니다.',
        ]);
    }

    // ... (기존 index, create, store 유지) ...

    public function edit(int $id)
    {
        $data = $this->service->getEditData($id);

        if (empty($data)) {
            return redirect()->route('admin.products.index')->with('toast', ['type' => 'danger', 'title' => '오류', 'message' => '상품을 찾을 수 없습니다.']);
        }

        return view('admin.product.products.edit', $data);
    }

    public function update(int $id, Request $request)
    {
        $data = $this->validateProduct($request);

        $res = $this->service->updateProduct($id, $data, (int)auth('admin')->id(), $request->ip(), $request->userAgent() ?? '');

        if (!$res['ok']) {
            return redirect()->back()->withInput()->with('toast', ['type' => 'danger', 'title' => '수정 실패', 'message' => $res['message']]);
        }

        return redirect()->route('admin.products.index')->with('toast', ['type' => 'success', 'title' => '완료', 'message' => $res['message']]);
    }

}