<?php

namespace App\Traits\Purchase;

use App\Models\Bottle;
use App\Models\Perfume;
use App\Models\Product;
use App\Services\StockActivityLogService;

trait WithWarehouseStock
{
    public function increaseWarehouseStock($warehouse, $item): void
    {
        $quantity = $item->quantity;

        switch ($item->purchasable_type) {
            case Perfume::class:
                $relation = 'perfumes';
                break;
            case Product::class:
                $relation = 'products';
                break;
            case Bottle::class:
                $relation = 'bottles';
                break;
            default:
                return;
        }

        // Lock the row to prevent race conditions
        $existing = $warehouse->{$relation}()
            ->where("{$relation}.id", $item->purchasable_id)
            ->lockForUpdate()
            ->withPivot('stock')
            ->first();

        if ($existing) {
            $previousStock = $existing->pivot->stock ?? 0;
            $warehouse->{$relation}()->updateExistingPivot($item->purchasable_id, [
                'stock' => $previousStock + $quantity,
            ]);
        } else {
            $previousStock = 0;
            $warehouse->{$relation}()->attach($item->purchasable_id, [
                'stock' => $quantity,
            ]);
        }

        $purchase = $item->purchase ?? \App\Models\Purchase::find($item->purchase_id);

        if ($purchase) {
            StockActivityLogService::purchase(
                purchase: $purchase,
                product: $item->purchasable,
                quantity: $quantity,
                previousStock: $previousStock,
                newStock: $previousStock + $quantity
            );
        } else {
            StockActivityLogService::logWarehouse(
                logName: StockActivityLogService::LOG_PURCHASE,
                event: 'increase',
                description: 'Stok '.$item->purchasable->name.' di gudang '.$warehouse->name.' bertambah '.formatCurrencyNumber($quantity),
                performedOn: $item->purchasable,
                warehouse: $warehouse,
                quantityChange: $quantity,
                previousStock: $previousStock,
                newStock: $previousStock + $quantity,
                extraProperties: [
                    'purchasable_id' => $item->purchasable_id,
                    'purchasable_type' => $item->purchasable_type,
                    'purchase_id' => $item->purchase_id ?? null,
                ]
            );
        }
    }

    public function decreaseWarehouseStock($warehouse, $item): void
    {
        $quantity = $item->quantity;

        switch ($item->purchasable_type) {
            case Perfume::class:
                $relation = 'perfumes';
                break;
            case Product::class:
                $relation = 'products';
                break;
            case Bottle::class:
                $relation = 'bottles';
                break;
            default:
                return;
        }

        $existing = $warehouse->{$relation}()
            ->where("{$relation}.id", $item->purchasable_id)
            ->lockForUpdate()
            ->withPivot('stock')
            ->first();

        if ($existing) {
            $currentStock = $existing->pivot->stock ?? 0;
            $newStock = max(0, $currentStock - $quantity);
            $warehouse->{$relation}()->updateExistingPivot($item->purchasable_id, [
                'stock' => $newStock,
            ]);
        } else {
            $currentStock = 0;
            $newStock = 0;
        }

        StockActivityLogService::logWarehouse(
            logName: StockActivityLogService::LOG_PURCHASE,
            event: 'decrease',
            description: 'Stok '.$item->purchasable->name.' di gudang '.$warehouse->name.' berkurang '.$quantity,
            performedOn: $item->purchasable,
            warehouse: $warehouse,
            quantityChange: -1 * abs($quantity),
            previousStock: $currentStock,
            newStock: $newStock,
            extraProperties: [
                'purchasable_id' => $item->purchasable_id,
                'purchasable_type' => $item->purchasable_type,
                'purchase_id' => $item->purchase_id,
            ]
        );
    }
}