<?php

namespace App\Services;

use App\Http\Controllers\Controller;
use App\Models\Order;
use App\Models\Product;

class BalanceReportService
{
    public const METAL_LABELS = [
        1 => 'طلا',
        2 => 'نقره',
        3 => 'مس',
    ];

    public function __construct(
        private readonly ConfigService $configService
    ) {
    }

    /** @return list<int> */
    public function catalogMetalIds(): array
    {
        return Product::query()
            ->where('active', 1)
            ->whereNotNull('metal_id')
            ->where('metal_id', '>', 0)
            ->distinct()
            ->orderBy('metal_id')
            ->pluck('metal_id')
            ->map(static fn ($id) => (int) $id)
            ->values()
            ->all();
    }

    public function metalLabel(int $metalId): string
    {
        return self::METAL_LABELS[$metalId] ?? "فلز {$metalId}";
    }

    /** واحد نمایش موجودی/تراز هر فلز در ادمین — مس کیلوگرم، بقیه گرم */
    public function metalDisplayUnit(int $metalId): string
    {
        return (int) $metalId === 3 ? 'کیلوگرم' : 'گرم';
    }

    public function gramsToMetalDisplay(float $grams, int $metalId): float
    {
        return (int) $metalId === 3 ? $grams / 1000.0 : $grams;
    }

    /**
     * @return array<int, string>
     */
    public function catalogMetalsMeta(): array
    {
        $items = [];
        foreach ($this->catalogMetalIds() as $metalId) {
            $metalId = (int) $metalId;
            $items[] = [
                'metal_id' => $metalId,
                'label' => $this->metalLabel($metalId),
                'display_unit' => $this->metalDisplayUnit($metalId),
            ];
        }

        return $items;
    }

    /**
     * @return array<int, array{gold: float, cash: float}>
     */
    public function resolveOrderMetalSlices(Order $order): array
    {
        $order->loadMissing(['transactions.product']);

        $slices = [];
        $txWithProduct = $order->transactions->filter(
            static fn ($tx) => $tx->product_id && abs((float) ($tx->gold ?? 0)) > 0
        );

        if ($txWithProduct->isNotEmpty()) {
            foreach ($txWithProduct as $tx) {
                $metalId = (int) ($tx->product?->metal_id ?? 1);
                if ($metalId <= 0) {
                    $metalId = 1;
                }
                $gold = abs((float) ($tx->gold ?? 0));
                if ($gold <= 0) {
                    continue;
                }
                $slices[$metalId] = ($slices[$metalId] ?? 0.0) + $gold;
            }

            $totalGold = array_sum($slices);
            $result = [];
            foreach ($slices as $metalId => $gold) {
                $cashShare = $totalGold > 0
                    ? (float) $order->total_price * ($gold / $totalGold)
                    : 0.0;
                $result[(int) $metalId] = ['gold' => $gold, 'cash' => $cashShare];
            }

            return $result;
        }

        $amount = (float) ($order->amount ?? 0);
        $totalPrice = (float) ($order->total_price ?? 0);
        if ($amount <= 0) {
            return [];
        }

        $metalId = 1;
        $tx = $order->transactions->first(static fn ($t) => $t->product_id);
        if ($tx?->product) {
            $metalId = max(1, (int) ($tx->product->metal_id ?? 1));
        }

        return [$metalId => ['gold' => $amount, 'cash' => $totalPrice]];
    }

    /**
     * @param list<int> $metalIds
     * @return array<int, array{gold: float, cash: float, gold_abs: float, cash_abs: float}>
     */
    public function initMetalBalanceBuckets(array $metalIds): array
    {
        $buckets = [];
        foreach ($metalIds as $metalId) {
            $buckets[(int) $metalId] = [
                'gold' => 0.0,
                'cash' => 0.0,
                'gold_abs' => 0.0,
                'cash_abs' => 0.0,
            ];
        }

        return $buckets;
    }

    /**
     * @param array<int, array{gold: float, cash: float, gold_abs: float, cash_abs: float}> $buckets
     */
    public function applyOrderToBuckets(array &$buckets, Order $order): void
    {
        $slices = $this->resolveOrderMetalSlices($order);
        foreach ($slices as $metalId => $slice) {
            $metalId = (int) $metalId;
            if (! isset($buckets[$metalId])) {
                $buckets[$metalId] = [
                    'gold' => 0.0,
                    'cash' => 0.0,
                    'gold_abs' => 0.0,
                    'cash_abs' => 0.0,
                ];
            }

            $gold = (float) $slice['gold'];
            $cash = (float) $slice['cash'];

            if ((int) $order->direction === 1) {
                $buckets[$metalId]['gold'] += $gold;
                $buckets[$metalId]['cash'] -= $cash;
            } elseif ((int) $order->direction === 2) {
                $buckets[$metalId]['gold'] -= $gold;
                $buckets[$metalId]['cash'] += $cash;
            }

            $buckets[$metalId]['gold_abs'] += $gold;
            $buckets[$metalId]['cash_abs'] += $cash;
        }
    }

    /**
     * @param array<int, array{gold: float, cash: float, gold_abs: float, cash_abs: float}> $limanBuckets
     * @param array<int, array{gold: float, cash: float, gold_abs: float, cash_abs: float}> $kalhorBuckets
     */
    public function buildMetalBalancesResponse(array $limanBuckets, array $kalhorBuckets): array
    {
        $metalIds = array_values(array_unique(array_merge(
            array_keys($limanBuckets),
            array_keys($kalhorBuckets)
        )));
        sort($metalIds);

        $items = [];
        $totalGoldBalance = 0.0;

        foreach ($metalIds as $metalId) {
            $metalId = (int) $metalId;
            $liman = $limanBuckets[$metalId] ?? [
                'gold' => 0.0,
                'cash' => 0.0,
                'gold_abs' => 0.0,
                'cash_abs' => 0.0,
            ];
            $kalhor = $kalhorBuckets[$metalId] ?? [
                'gold' => 0.0,
                'cash' => 0.0,
                'gold_abs' => 0.0,
                'cash_abs' => 0.0,
            ];

            $goldBalance = -$liman['gold'] + $kalhor['gold'];
            $cashBalance = -$liman['cash'] + $kalhor['cash'];
            $goldBalanceOfLiman = -$liman['gold'];
            $goldBalanceOfKalhor = $kalhor['gold'];

            $items[] = [
                'metal_id' => $metalId,
                'label' => $this->metalLabel($metalId),
                'balance' => round($goldBalance, 4),
                'goldBalance' => round($goldBalance, 4),
                'cashBalance' => round($cashBalance, 2),
                'goldBalanceOfLiman' => round($goldBalanceOfLiman, 4),
                'goldBalanceOfKalhor' => round($goldBalanceOfKalhor, 4),
            ];

            $totalGoldBalance += $goldBalance;
        }

        return [
            'items' => $items,
            'totalGoldBalance' => round($totalGoldBalance, 4),
        ];
    }

    /** @param array<int, array{gold: float, cash: float, gold_abs: float, cash_abs: float}> $buckets */
    public function applyKalhorSlice(
        array &$buckets,
        float $gold,
        float $cash,
        int $direction,
        int $metalId = 1
    ): void {
        if (! isset($buckets[$metalId])) {
            $buckets[$metalId] = [
                'gold' => 0.0,
                'cash' => 0.0,
                'gold_abs' => 0.0,
                'cash_abs' => 0.0,
            ];
        }

        if ($direction === 2) {
            $buckets[$metalId]['gold'] += $gold;
            $buckets[$metalId]['cash'] -= $cash;
        } elseif ($direction === 1) {
            $buckets[$metalId]['gold'] -= $gold;
            $buckets[$metalId]['cash'] += $cash;
        }

        $buckets[$metalId]['gold_abs'] += $gold;
        $buckets[$metalId]['cash_abs'] += $cash;
    }

    public function resolveTransactionMetalId(mixed $transaction): int
    {
        $product = $this->resolveTransactionProduct($transaction);
        if ($product !== null) {
            $metalId = (int) ($product->metal_id ?? 0);

            return $metalId > 0 ? $metalId : 1;
        }

        if ($this->isMainWalletMetalTransaction($transaction)) {
            return $this->configService->mainWalletMetalId();
        }

        return 1;
    }

    public function resolveTransactionDisplayTypeStr(mixed $transaction, ?int $metalId = null): ?string
    {
        $type = $this->resolveTransactionType($transaction);
        if (in_array($type, [3, 4, 8, 9], true)) {
            return null;
        }

        $productLabel = $this->resolveTransactionProductLabel($transaction);
        if ($productLabel === null) {
            return null;
        }

        $prefix = $this->resolveTransactionActionPrefix($transaction)
            ?? $this->inferActionPrefixFromLabel(trim((string) ($this->lineValue($transaction, 'type_str') ?? '')))
            ?? $this->inferActionPrefixFromGold($transaction);

        if ($prefix === null) {
            return null;
        }

        return trim($prefix . ' ' . $productLabel);
    }

    private function resolveTransactionType(mixed $transaction): int
    {
        $type = $this->lineValue($transaction, 'type');
        if ($type !== null && $type !== '' && is_numeric($type)) {
            return (int) $type;
        }

        if (is_object($transaction) && method_exists($transaction, 'getAttributes')) {
            $attrs = $transaction->getAttributes();
            if (isset($attrs['type']) && is_numeric($attrs['type'])) {
                return (int) $attrs['type'];
            }
            if (isset($attrs['type_str']) && is_numeric($attrs['type_str'])) {
                return (int) $attrs['type_str'];
            }
        }

        return 0;
    }

    private function resolveTransactionActionPrefix(mixed $transaction): ?string
    {
        $type = $this->resolveTransactionType($transaction);
        $gold = (float) ($this->lineValue($transaction, 'gold') ?? 0);

        return match (true) {
            $type === 1 => 'خرید',
            $type === 2 => 'فروش',
            $type === 51 => 'اصلاح',
            in_array($type, [6, 10], true) => 'برداشت',
            $type === 5 => 'واریز',
            $type === 7 => $gold >= 0 ? 'واریز' : 'برداشت',
            $type === 12 => 'برداشت وجه',
            abs($gold) > 0 => $gold > 0 ? 'واریز' : 'برداشت',
            default => null,
        };
    }

    private function inferActionPrefixFromGold(mixed $transaction): ?string
    {
        $gold = (float) ($this->lineValue($transaction, 'gold') ?? 0);
        if (abs($gold) < 0.0000001) {
            return null;
        }

        return $gold > 0 ? 'واریز' : 'برداشت';
    }

    private function inferActionPrefixFromLabel(string $label): ?string
    {
        if (preg_match('/^خرید/u', $label)) {
            return 'خرید';
        }
        if (preg_match('/^فروش/u', $label)) {
            return 'فروش';
        }
        if (preg_match('/^برداشت/u', $label)) {
            return 'برداشت';
        }
        if (preg_match('/^(واریز|موجودی)/u', $label)) {
            return 'واریز';
        }

        return null;
    }

    private function shouldReplaceGenericTransactionLabel(string $label): bool
    {
        if ($label === 'تعریف نشده' || $label === '') {
            return true;
        }

        $generic = [
            'واریز',
            'برداشت',
            'واریز طلایی',
            'برداشت طلایی',
            'خرید طلا',
            'فروش طلا',
        ];

        return in_array($label, $generic, true);
    }

    public function resolveTransactionProductLabel(mixed $transaction): ?string
    {
        $product = $this->resolveTransactionProduct($transaction);
        if ($product !== null && !empty($product->title)) {
            return trim((string) $product->title);
        }

        if ($this->isMainWalletMetalTransaction($transaction)) {
            $labels = $this->configService->mainWalletProductLabels();

            return $labels !== '' ? $labels : null;
        }

        return $this->parseProductLabelFromNote($transaction);
    }

    private function parseProductLabelFromNote(mixed $transaction): ?string
    {
        $note = trim((string) ($this->lineValue($transaction, 'note') ?? ''));
        if ($note === '') {
            return null;
        }

        if (preg_match('/(?:برداشت|واریز)\s+محصول\s+(.+?)\s+شماره\s+سند/u', $note, $matches)) {
            return trim($matches[1]);
        }

        return null;
    }

    private function resolveTransactionTitleLabel(mixed $transaction): ?string
    {
        $title = trim((string) ($this->lineValue($transaction, 'title') ?? ''));
        if ($title === '' || $title === 'تعریف نشده') {
            return null;
        }

        return $title;
    }

    public function transactionGoldGrams(mixed $transaction): float
    {
        $gold = (float) ($this->lineValue($transaction, 'gold') ?? 0);
        if (abs($gold) < 0.0000001) {
            return 0.0;
        }

        $product = $this->transactionProduct($transaction);
        if ($product !== null) {
            return Controller::productLineWeightToGrams($product, $gold);
        }

        return Controller::weightToGrams($gold);
    }

    /**
     * @param list<int> $catalogMetalIds
     * @return array<string, float>
     */
    public function buildTransactionMetalDisplayMap(mixed $transaction, array $catalogMetalIds): array
    {
        $map = [];
        foreach ($catalogMetalIds as $metalId) {
            $map[(string) (int) $metalId] = 0.0;
        }

        $type = (int) ($this->lineValue($transaction, 'type') ?? 0);
        if (in_array($type, [3, 4], true)) {
            return $map;
        }

        $gold = (float) ($this->lineValue($transaction, 'gold') ?? 0);
        if (abs($gold) < 0.0000001) {
            return $map;
        }

        $metalId = $this->resolveTransactionMetalId($transaction);
        $grams = abs($this->transactionGoldGrams($transaction));
        $display = $this->gramsToMetalDisplay($grams, $metalId);
        if ($gold < 0) {
            $display *= -1;
        }

        $map[(string) $metalId] = round($display, 3);

        return $map;
    }

    /**
     * @param list<int> $catalogMetalIds
     */
    public function enrichTransactionTableRow(mixed &$row, array $catalogMetalIds): void
    {
        $metalMap = $this->buildTransactionMetalDisplayMap($row, $catalogMetalIds);
        $metalId = $this->resolveTransactionMetalId($row);
        $metalLabel = $this->metalLabel($metalId);
        $currentTypeStr = trim((string) ($this->lineValue($row, 'type_str') ?? ''));
        $titleLabel = $this->resolveTransactionTitleLabel($row);
        $productAware = $this->resolveTransactionDisplayTypeStr($row, $metalId);
        $product = $this->resolveTransactionProduct($row);
        $productTitle = $this->resolveTransactionProductLabel($row);
        $productId = (int) ($this->lineValue($row, 'product_id') ?? 0);
        if ($productId <= 0 && $product !== null) {
            $productId = (int) ($product->id ?? 0);
        }

        // عنوان ژنریک مثل «خرید طلا» را با «خرید {نام محصول}» عوض کن
        if ($productAware !== null && (
            $titleLabel === null
            || $this->shouldReplaceGenericTransactionLabel($titleLabel)
            || $this->shouldReplaceGenericTransactionLabel($currentTypeStr)
        )) {
            $displayType = $productAware;
        } else {
            $displayType = $titleLabel;
        }

        $productPayload = $this->productTablePayload($product);

        if (is_array($row)) {
            $row['metal_gold'] = $metalMap;
            $row['transaction_metal_id'] = $metalId;
            $row['transaction_metal_label'] = $metalLabel;
            $row['product_id'] = $productId > 0 ? $productId : null;
            $row['product_title'] = $productTitle;
            if ($productPayload !== null && empty($row['product'])) {
                $row['product'] = $productPayload;
            }
            if ($displayType !== null) {
                $row['type_str'] = $displayType;
            }
            foreach ($catalogMetalIds as $mid) {
                $row['metal_gold_' . $mid] = $metalMap[(string) $mid] ?? 0.0;
            }

            return;
        }

        if (is_object($row)) {
            $row->metal_gold = $metalMap;
            $row->transaction_metal_id = $metalId;
            $row->transaction_metal_label = $metalLabel;
            $row->product_id = $productId > 0 ? $productId : null;
            $row->product_title = $productTitle;
            if ($product instanceof Product && empty($this->lineValue($row, 'product'))) {
                $row->setRelation('product', $product);
            }
            if ($displayType !== null) {
                $row->setAttribute('type_str', $displayType);
            }
            foreach ($catalogMetalIds as $mid) {
                $row->{'metal_gold_' . $mid} = $metalMap[(string) $mid] ?? 0.0;
            }
        }
    }

    private function transactionProduct(mixed $transaction): ?object
    {
        if (is_object($transaction) && isset($transaction->product) && $transaction->product) {
            return $transaction->product;
        }

        if (is_array($transaction) && isset($transaction['product']) && $transaction['product']) {
            $product = $transaction['product'];

            return is_object($product) ? $product : (object) $product;
        }

        return null;
    }

    private function resolveTransactionProduct(mixed $transaction): ?object
    {
        $product = $this->transactionProduct($transaction);
        if ($product !== null && ! empty($product->title ?? null)) {
            return $product;
        }

        $walletProduct = $this->transactionWalletProduct($transaction);
        if ($walletProduct !== null && ! empty($walletProduct->title ?? null)) {
            return $walletProduct;
        }

        $productId = (int) ($this->lineValue($transaction, 'product_id') ?? 0);
        if ($productId > 0) {
            return Product::withTrashed()
                ->select(['id', 'title', 'group_type', 'unit', 'direct_price', 'amount', 'trade_by_quantity', 'metal_id', 'file_id'])
                ->find($productId);
        }

        return $product ?? $walletProduct;
    }

    /**
     * @return array<string, mixed>|null
     */
    private function productTablePayload(?object $product): ?array
    {
        if ($product === null) {
            return null;
        }

        $id = (int) ($product->id ?? 0);
        if ($id <= 0) {
            return null;
        }

        return [
            'id' => $id,
            'title' => $product->title ?? null,
            'group_type' => $product->group_type ?? null,
            'unit' => $product->unit ?? null,
            'amount' => $product->amount ?? null,
            'trade_by_quantity' => (bool) ($product->trade_by_quantity ?? false),
            'direct_price' => $product->direct_price ?? null,
            'metal_id' => isset($product->metal_id) ? (int) $product->metal_id : null,
        ];
    }

    private function transactionWalletProduct(mixed $transaction): ?object
    {
        $wallet = $this->lineValue($transaction, 'wallet');
        if ($wallet === null) {
            return null;
        }

        if (is_object($wallet)) {
            return isset($wallet->product) ? $wallet->product : null;
        }

        if (is_array($wallet) && isset($wallet['product'])) {
            $product = $wallet['product'];

            return is_object($product) ? $product : (object) $product;
        }

        return null;
    }

    private function isMainWalletMetalTransaction(mixed $transaction): bool
    {
        $wallet = $this->lineValue($transaction, 'wallet');
        if ($wallet === null) {
            return true;
        }

        if (is_object($wallet)) {
            if ($wallet->product_id !== null || $wallet->fund_id !== null) {
                return false;
            }
        } elseif (is_array($wallet)) {
            if (($wallet['product_id'] ?? null) !== null || ($wallet['fund_id'] ?? null) !== null) {
                return false;
            }
        } else {
            return true;
        }

        $type = $this->resolveTransactionType($transaction);
        $gold = (float) ($this->lineValue($transaction, 'gold') ?? 0);

        return in_array($type, [1, 2, 5, 6, 7, 10, 51], true) || abs($gold) > 0;
    }

    public function resolveOrderMetalId(mixed $order): int
    {
        $product = $this->resolveOrderProduct($order);
        if ($product !== null) {
            $metalId = (int) ($product->metal_id ?? 0);

            return $metalId > 0 ? $metalId : 1;
        }

        return 1;
    }

    /**
     * @param list<int> $catalogMetalIds
     */
    public function enrichOrderTableRow(mixed &$row, array $catalogMetalIds = []): void
    {
        $product = $this->resolveOrderProduct($row);
        $unit = $this->resolveOrderAmountUnit($product);
        $amount = (float) ($this->lineValue($row, 'amount') ?? 0);
        $displayAmount = $this->resolveOrderDisplayAmount($amount, $product);
        $metalId = $this->resolveOrderMetalId($row);
        $metalLabel = $this->metalLabel($metalId);
        $price = (float) ($this->lineValue($row, 'price') ?? 0);
        $fee = (float) ($this->lineValue($row, 'fee') ?? 0);
        $totalFee = (float) ($this->lineValue($row, 'total_fee') ?? 0);
        $direction = (int) ($this->lineValue($row, 'direction') ?? 0);

        $productId = (int) ($this->lineValue($row, 'product_id') ?? 0);
        if ($productId <= 0 && $product !== null) {
            $productId = (int) ($product->id ?? 0);
        }
        $productTitle = $product !== null ? trim((string) ($product->title ?? '')) : '';
        $productPayload = $this->productTablePayload($product);

        $storedSource = trim((string) ($this->lineValue($row, 'fee_source') ?? ''));
        $storedLabel = trim((string) ($this->lineValue($row, 'fee_source_label') ?? ''));
        $storedKey = trim((string) ($this->lineValue($row, 'fee_source_key') ?? ''));
        $storedBreakdown = $this->lineValue($row, 'fee_breakdown');
        if (is_string($storedBreakdown) && $storedBreakdown !== '') {
            $decoded = json_decode($storedBreakdown, true);
            $storedBreakdown = is_array($decoded) ? $decoded : null;
        } elseif (! is_array($storedBreakdown)) {
            $storedBreakdown = null;
        }
        $feeSource = $storedSource !== '' ? $storedSource : $this->resolveOrderFeeSourceKey($product);
        $feeSourceLabel = $storedLabel !== ''
            ? $storedLabel
            : $this->resolveOrderFeeSourceLabel($direction, $feeSource);
        $feeSourceKey = $storedKey !== '' ? $storedKey : null;

        $metalPrices = [];
        foreach ($catalogMetalIds as $mid) {
            $mid = (int) $mid;
            $metalPrices[(string) $mid] = $mid === $metalId ? $price : 0.0;
        }

        $payload = [
            'amount_unit' => $unit,
            'amount_display' => $displayAmount,
            'order_metal_id' => $metalId,
            'order_metal_label' => $metalLabel,
            'metal_prices' => $metalPrices,
            'product_id' => $productId > 0 ? $productId : null,
            'product_title' => $productTitle !== '' ? $productTitle : null,
            'fee_source' => $feeSource,
            'fee_source_key' => $feeSourceKey,
            'fee_source_label' => $feeSourceLabel,
            'fee_breakdown' => $storedBreakdown,
            'fee_display' => abs($fee),
            'total_fee_display' => abs($totalFee),
        ];

        foreach ($catalogMetalIds as $mid) {
            $payload['metal_price_' . (int) $mid] = $metalPrices[(string) (int) $mid] ?? 0.0;
        }

        if (is_array($row)) {
            foreach ($payload as $key => $value) {
                $row[$key] = $value;
            }
            if ($productPayload !== null && empty($row['product'])) {
                $row['product'] = $productPayload;
            }

            return;
        }

        if (is_object($row)) {
            foreach ($payload as $key => $value) {
                $row->{$key} = $value;
            }
            if ($productPayload !== null && empty($this->lineValue($row, 'product'))) {
                if ($product instanceof Product) {
                    $row->setRelation('product', $product);
                } else {
                    $row->product = $productPayload;
                }
            }
        }
    }

    /** settings | product | app+product — هم‌تراز resolveCashPriceDiffMeta در SingleOrderController */
    public function resolveOrderFeeSourceKey(?object $product = null): string
    {
        if ($product instanceof Product) {
            if (app(ProductDisplayPriceService::class)->usesAppPrice($product)) {
                return 'app+product';
            }

            return 'product';
        }

        $provider = $this->configService->priceProvider();
        if (in_array($provider, ['zaarbox', 'main_product'], true)) {
            return 'settings';
        }

        return 'product';
    }

    public function resolveOrderFeeSourceLabel(int $direction, ?string $feeSource = null): string
    {
        $source = $feeSource ?? $this->resolveOrderFeeSourceKey();
        if ($source === 'app+product') {
            return $direction === 2
                ? 'قیمت صفحه اصلی اپلیکیشن (sell_fee) + تب اختلاف محصول'
                : 'قیمت صفحه اصلی اپلیکیشن (buy_fee) + تب اختلاف محصول';
        }
        if ($source === 'settings') {
            return $direction === 2
                ? 'تنظیمات سراسری (sell_fee / fee_single)'
                : 'تنظیمات سراسری (buy_fee / fee_single)';
        }

        return $direction === 2
            ? 'هزینه فروش محصول (cash_fee_sell)'
            : 'هزینه خرید محصول (cash_fee_buy)';
    }

    public function resolveOrderAmountUnit(?object $product): string
    {
        if ($product === null) {
            return Controller::tradeWeightUnit();
        }

        return Controller::productQuantityUnit(Controller::productUnitPayload($product));
    }

    private function resolveOrderDisplayAmount(float $amount, ?object $product): float
    {
        if ($product === null || abs($amount) < 0.0000001) {
            return round($amount, 3);
        }

        $payload = Controller::productUnitPayload($product);
        $productUnit = trim((string) ($payload['unit'] ?? ''));
        if (!Controller::isWeightBasedProductUnit($productUnit)) {
            return round($amount, 3);
        }

        $tradeUnit = Controller::tradeWeightUnit();
        if ($productUnit !== $tradeUnit) {
            return round(Controller::convertWeight($amount, $tradeUnit, $productUnit), 3);
        }

        return round($amount, 3);
    }

    private function resolveOrderProduct(mixed $order): ?object
    {
        $embedded = $this->lineValue($order, 'product');
        if (is_object($embedded) && ! empty($embedded->title ?? null)) {
            return $embedded;
        }
        if (is_array($embedded) && ! empty($embedded['title'])) {
            return (object) $embedded;
        }

        $productId = (int) ($this->lineValue($order, 'product_id') ?? 0);
        if ($productId > 0) {
            $byId = Product::withTrashed()
                ->select(['id', 'title', 'unit', 'metal_id', 'group_type', 'amount', 'trade_by_quantity', 'direct_price'])
                ->find($productId);
            if ($byId) {
                return $byId;
            }
        }

        $transactions = $this->lineValue($order, 'transactions');
        if ($transactions instanceof \Illuminate\Support\Collection) {
            $transactions = $transactions->all();
        }

        if (!is_array($transactions)) {
            return null;
        }

        foreach ($transactions as $tx) {
            $product = is_object($tx) ? ($tx->product ?? null) : ($tx['product'] ?? null);
            if ($product) {
                return is_object($product) ? $product : (object) $product;
            }

            $txProductId = (int) ($this->lineValue($tx, 'product_id') ?? 0);
            if ($txProductId > 0) {
                $byTx = Product::withTrashed()
                    ->select(['id', 'title', 'unit', 'metal_id', 'group_type', 'amount', 'trade_by_quantity', 'direct_price'])
                    ->find($txProductId);
                if ($byTx) {
                    return $byTx;
                }
            }
        }

        return null;
    }

    private function lineValue(mixed $line, string $key): mixed
    {
        if (is_array($line)) {
            return $line[$key] ?? null;
        }

        if (is_object($line)) {
            return $line->{$key} ?? null;
        }

        return null;
    }
}