boursecu_server/app/Services/BalanceReportService.php

<?php

namespace App\Services;

use App\Models\Order;
use App\Models\Product;

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

    /** @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;
    }
}