<?php

namespace App\Http\Controllers;

use App\Services\ProductService;
use App\Http\Requests\ProductRequest;
use App\Http\Requests\ProductStockRequest;
use Illuminate\Http\Request;
use PhpOffice\PhpSpreadsheet\IOFactory;
use App\Http\Resources\ProductResource;
use Illuminate\Http\JsonResponse;

class ProductController extends Controller
{
    public function __construct(
        protected ProductService $service,
    ) {}

    public function select(): JsonResponse
    {
        $items = $this->service->getAllForSelect();
        return $this->successResponse(payload: $items);
    }

    public function index(): JsonResponse
    {
        $items = $this->service->getAll();
        return $this->successResponse(payload: ProductResource::collection($items));
    }

    public function store(ProductRequest $request): JsonResponse
    {
        $item = $this->service->create($request->validated());
        return $this->successResponse(payload: new ProductResource($item), message: __('messages.created'), code: 201);
    }

    public function show(int $id): JsonResponse
    {
        $item = $this->service->findById($id);
        return $this->successResponse(payload: new ProductResource($item));
    }

    public function update(ProductRequest $request, int $id): JsonResponse
    {
        $item = $this->service->update($id, $request->validated());
        return $this->successResponse(payload: new ProductResource($item), message: __('messages.updated'));
    }

    public function destroy(int $id): JsonResponse
    {
        $this->service->delete($id);
        return $this->successResponse(message: __('messages.deleted'), code: 204);
    }

    public function import(Request $request): JsonResponse
    {
        $request->validate(['file' => 'required|file|mimes:xlsx,xls,csv']);

        $spreadsheet = IOFactory::load($request->file('file')->getRealPath());
        $rows        = $spreadsheet->getActiveSheet()->toArray();

        if (empty($rows)) {
            return $this->errorResponse('Arquivo vazio.', 422);
        }

        $headers = array_map(fn($h) => mb_strtolower(trim((string) $h)), $rows[0]);

        $colName  = null;
        $colQty   = null;
        $colPrice = null;

        foreach ($headers as $i => $h) {
            if ($colName  === null && str_contains($h, 'descri')) $colName  = $i;
            if ($colQty   === null && (str_contains($h, 'qtd') || str_contains($h, 'quant'))) $colQty = $i;
            if ($colPrice === null && (str_contains($h, 'pre') || str_contains($h, 'valor'))) $colPrice = $i;
        }

        if ($colName === null || $colQty === null || $colPrice === null) {
            return $this->errorResponse('Colunas não encontradas. O arquivo deve conter: Descrição, Qtd, Preço.', 422);
        }

        $imported = [];

        for ($i = 1; $i < count($rows); $i++) {
            $row  = $rows[$i];
            $name = trim((string) ($row[$colName] ?? ''));

            if ($name === '') continue;

            $qty   = (int)   ($row[$colQty]   ?? 0);
            $price = (float) ($row[$colPrice]  ?? 0);

            $product = $this->service->importRow($name, $qty, $price);
            $imported[] = new ProductResource($product);
        }

        return $this->successResponse(payload: $imported);
    }

    public function adjustStock(ProductStockRequest $request, int $id): JsonResponse
    {
        $result = $this->service->adjustStock($id, $request->type, $request->quantity);

        if (isset($result['error'])) {
            return $this->errorResponse($result['error'], 422);
        }

        return $this->successResponse(payload: new ProductResource($result['product']), message: __('messages.updated'));
    }
}