<?php

namespace App\Services;

use App\Models\Product;

class ProductPriceService
{
    public static function referenceTotal(int $basePrice, int $baseProfit = 0): int
    {
        return $basePrice + $baseProfit;
    }

    public static function adjustedTotal(int $basePrice, int $baseProfit, float $offsetPercent): int
    {
        $reference = self::referenceTotal($basePrice, $baseProfit);

        return (int) round($reference * (1 + ($offsetPercent / 100)));
    }

    /** مرجع API + درصد محصول → ذخیره در price (سود خرید/فروش جداگانه در سفارش اعمال می‌شود) */
    public static function offsetPercent(Product $product): float
    {
        return Product::hasPriceOffsetColumn()
            ? (float) ($product->price_offset_percent ?? 0)
            : 0.0;
    }

    /** @return array<string, mixed>|null */
    public static function syncFromReference(Product $product, int $basePrice, int $baseProfit = 0, ?string $sourceName = null): ?array
    {
        if (!Product::hasStoredPriceColumns()) {
            return null;
        }

        $offsetPercent = self::offsetPercent($product);
        $adjustedPrice = self::adjustedTotal($basePrice, $baseProfit, $offsetPercent);
        $oldPrice = (int) ($product->price ?? 0);

        if (
            $adjustedPrice <= 0
            && Product::hasUseLastPriceIfZeroColumn()
            && ($product->use_last_price_if_zero ?? false)
        ) {
            return null;
        }

        $data = ['price' => $adjustedPrice];

        if (\Illuminate\Support\Facades\Schema::hasColumn($product->getTable(), 'price_profit')) {
            $data['price_profit'] = 0;
        }

        Product::where('id', $product->id)->update($data);

        return [
            'product_id' => $product->id,
            'product_title' => $product->title,
            'reading_method' => $product->reading_method,
            'source_name' => $sourceName ?? $product->reading_method,
            'base_price' => $basePrice,
            'base_profit' => $baseProfit,
            'offset_percent' => $offsetPercent,
            'old_price' => $oldPrice,
            'new_price' => $adjustedPrice,
            'changed' => $oldPrice !== $adjustedPrice,
        ];
    }

    /** وقتی فقط درصد در ادمین عوض می‌شود (بدون sync جدید) */
    public static function reapplyOffsetPercent(Product $product, float $newOffsetPercent, ?float $oldOffsetPercent = null): void
    {
        if (!Product::hasPriceOffsetColumn() || !Product::hasStoredPriceColumns()) {
            return;
        }

        $oldOffset = $oldOffsetPercent ?? self::offsetPercent($product);
        $currentTotal = (int) ($product->price + ($product->price_profit ?? 0));
        $reference = $oldOffset != 0.0
            ? (int) round($currentTotal / (1 + $oldOffset / 100))
            : $currentTotal;

        Product::where('id', $product->id)->update([
            'price' => (int) round($reference * (1 + ($newOffsetPercent / 100))),
            'price_profit' => 0,
        ]);
    }
}