<?php

namespace App\Helper;

use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Log;
use Modules\Restaurant\Models\Ingredient;
use Modules\Restaurant\Models\Stock;

class StockHelper
{
    /**
     * Update ingredient stock and log the movement.
     *
     * @param  string  $type  (purchase, usage, return, damage, transfer_in, transfer_out)
     * @param  float|null  $unitCost  (cost per unit)
     * @param  string|null  $refType  (e.g., Purchase, Order, Wastage)
     */
    public static function updateStock(
        int $ingredientId,
        float $quantity,
        string $type,
        ?float $unitCost = null,
        ?string $refType = null,
        ?int $refId = null,
        ?string $batchNo = null,
        ?string $expiryDate = null,
        ?int $restaurantId = null,
        ?int $addedBy = null
    ): void {
        $ingredient = Ingredient::find($ingredientId);
        if (! $ingredient) {
            return;
        }

        // Determine signed quantity based on type
        $signedQty = in_array($type, ['purchase', 'return', 'transfer_in', 'adjust_plus'])
            ? $quantity
            : -$quantity;

        // Update ingredient stock
        $ingredient->increment('stock_quantity', $signedQty);

        // Calculate total cost if unit cost is provided
        $totalCost = $unitCost !== null ? $unitCost * $quantity : null;

        // Record in stocks table
        Stock::create([
            'restaurant_id' => $restaurantId ?? $ingredient->restaurant_id ?? null,
            'ingredient_id' => $ingredientId,
            'type' => $type,
            'quantity' => $quantity,
            'unit_cost' => $unitCost,
            'total_cost' => $totalCost,
            'reference_type' => $refType,
            'purchase_id' => $refId,
            'batch_no' => $batchNo,
            'expiry_date' => $expiryDate,
            'added_by' => $addedBy ?? Auth::id(),
            'remarks' => ucfirst($type).' stock movement',
        ]);
    }
}