<?php

namespace App\Services;

use App\Http\Controllers\Single\SingleOrderController;
use App\Models\ConditionalOrder;
use App\Models\Customer;
use App\Models\Product;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Log;
use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;

class ConditionalOrderService
{
    public function evaluateFromLastPrice(array $payload = []): void
    {
        $config = app(ConfigService::class);
        if (! $config->isConditionalOrderEnabled()) {
            return;
        }

        $this->expirePendingPastDue();

        $orders = ConditionalOrder::query()
            ->with(['customer', 'product'])
            ->where('status', ConditionalOrder::STATUS_PENDING)
            ->where('is_active', true)
            ->whereHas('customer', function ($q) {
                $q->where('conditional_order_active', 1);
            })
            ->get();

        if ($orders->isEmpty()) {
            return;
        }

        $display = app(ProductDisplayPriceService::class);
        $liquidPrice = (int) ($payload['price'] ?? $payload['buy'] ?? 0);
        if ($liquidPrice <= 0) {
            $liquidPrice = (int) ($config->getInt('montzar_live_price', 0));
        }

        $productsById = Product::query()
            ->whereIn('id', $orders->pluck('product_id')->unique()->filter()->all())
            ->get()
            ->keyBy('id');

        if ($productsById->isNotEmpty()) {
            $display->enrichForApi($productsById);
        }

        foreach ($orders as $order) {
            try {
                $this->tryExecute($order, $productsById, $liquidPrice, $config);
            } catch (\Throwable $e) {
                Log::warning('Conditional order evaluate failed', [
                    'id' => $order->id,
                    'message' => $e->getMessage(),
                ]);
            }
        }
    }

    private function tryExecute(
        ConditionalOrder $order,
        $productsById,
        int $liquidPrice,
        ConfigService $config
    ): void {
        $product = $productsById->get($order->product_id) ?? $order->product;
        if (! $product) {
            return;
        }

        $display = app(ProductDisplayPriceService::class);
        $currentPrice = $this->resolveComparePrice($product, $liquidPrice, $display);
        if ($currentPrice <= 0 || ! $order->conditionMet($currentPrice)) {
            return;
        }

        try {
            $config->assertProductTradingOpen($product);
        } catch (\Throwable $e) {
            // خارج ساعت — pending بماند
            return;
        }

        $this->executeOrder($order, $product, $currentPrice);
    }

    private function resolveComparePrice(Product $product, int $liquidPrice, ProductDisplayPriceService $display): int
    {
        if ($display->usesAppPrice($product)) {
            $base = $liquidPrice > 0 ? $liquidPrice : $display->resolveOrderBasePrice($product);

            return max(0, (int) $base);
        }

        $price = (int) ($product->price ?? 0);
        if ($price > 0) {
            return $price;
        }

        return max(0, (int) $display->resolveOrderBasePrice($product));
    }

    private function executeOrder(ConditionalOrder $order, Product $product, int $currentPrice): void
    {
        $customer = $order->customer ?? Customer::find($order->customer_id);
        if (! $customer || ! $customer->conditional_order_active) {
            return;
        }

        $payload = [
            'customer_id' => (int) $customer->id,
            'direction' => (int) $order->direction,
            'method' => 'cash',
        ];

        if ($this->isMeltedLikeProduct($product)) {
            $payload['abshode_id'] = (int) $product->id;
            $payload['amount'] = (float) ($order->amount ?? 0);
            if ($payload['amount'] <= 0) {
                $this->markFailed($order, $currentPrice, 'مقدار گرم نامعتبر است');

                return;
            }
        } else {
            $payload['product_id'] = (int) $product->id;
            $payload['number'] = (float) ($order->number ?? $order->amount ?? 0);
            if ($payload['number'] <= 0) {
                $this->markFailed($order, $currentPrice, 'تعداد نامعتبر است');

                return;
            }
        }

        $guard = Auth::guard('customer');
        $previous = $guard->user();
        $guard->setUser($customer);

        try {
            $request = Request::create('/customer/single/order', 'POST', $payload);
            $response = app(SingleOrderController::class)->store($request);
            $body = method_exists($response, 'getData')
                ? (array) $response->getData(true)
                : (is_array($response) ? $response : []);

            $orderData = (isset($body[1]) && is_array($body[1])) ? $body[1] : $body;
            $createdOrderId = (int) (
                data_get($orderData, 'order.id')
                ?: data_get($orderData, 'id')
                ?: 0
            );

            $order->status = ConditionalOrder::STATUS_EXECUTED;
            $order->is_active = false;
            $order->order_id = $createdOrderId > 0 ? $createdOrderId : null;
            $order->triggered_price = $currentPrice;
            $order->executed_at = now();
            $order->fail_reason = null;
            $order->save();
        } catch (\Throwable $e) {
            $message = $e instanceof HttpExceptionInterface
                ? ($e->getMessage() ?: 'خطا در ثبت سفارش')
                : ($e->getMessage() ?: 'خطا در ثبت سفارش');

            $this->markFailed($order, $currentPrice, $message);
        } finally {
            if ($previous) {
                $guard->setUser($previous);
            } else {
                $guard->forgetUser();
            }
        }
    }

    private function markFailed(ConditionalOrder $order, int $currentPrice, string $reason): void
    {
        $order->status = ConditionalOrder::STATUS_FAILED;
        $order->is_active = false;
        $order->triggered_price = $currentPrice;
        $order->executed_at = now();
        $order->fail_reason = mb_substr($reason, 0, 250);
        $order->save();
    }

    /** آبشده / معامله وزنی → amount؛ محصول ثابت → number */
    private function isMeltedLikeProduct(Product $product): bool
    {
        $group = trim((string) ($product->group_type ?? ''));
        if (in_array($group, ['آبشده', 'کاتد مس'], true)) {
            return true;
        }

        if ((bool) ($product->trade_by_quantity ?? false)) {
            return true;
        }

        $mainId = app(ConfigService::class)->mainProductId();

        return $mainId > 0 && (int) $product->id === (int) $mainId;
    }

    public function expirePendingPastDue(): int
    {
        $now = now()->timezone(config('app.timezone'))->format('Y-m-d H:i:s');

        return ConditionalOrder::query()
            ->where('status', ConditionalOrder::STATUS_PENDING)
            ->whereNotNull('expires_at')
            ->where('expires_at', '<', $now)
            ->update([
                'status' => ConditionalOrder::STATUS_EXPIRED,
                'is_active' => false,
                'fail_reason' => 'منقضی شده',
            ]);
    }

    public function assertCustomerCanUse(Customer $customer): void
    {
        $config = app(ConfigService::class);
        if (! $config->isConditionalOrderEnabled()) {
            throw new \Symfony\Component\HttpKernel\Exception\UnprocessableEntityHttpException(
                'قابلیت سفارش شرطی غیرفعال است.'
            );
        }

        if (! $customer->conditional_order_active) {
            throw new \Symfony\Component\HttpKernel\Exception\UnprocessableEntityHttpException(
                'سفارش شرطی برای شما مجاز نیست.'
            );
        }
    }

    public function assertWithinLimit(Customer $customer): void
    {
        $limit = $customer->conditional_order_limit;
        if ($limit === null || (int) $limit <= 0) {
            return;
        }

        $pending = ConditionalOrder::query()
            ->where('customer_id', $customer->id)
            ->where('status', ConditionalOrder::STATUS_PENDING)
            ->count();

        if ($pending >= (int) $limit) {
            throw new \Symfony\Component\HttpKernel\Exception\UnprocessableEntityHttpException(
                'سقف تعداد سفارش شرطی شما پر شده است.'
            );
        }
    }

    public function chargeRegistrationFee(Customer $customer): int
    {
        $fee = app(ConfigService::class)->conditionalOrderFee();
        if ($fee <= 0) {
            return 0;
        }

        $walletInterface = new \Rooyesh\Wallet\interfaces\WalletInterface(
            (int) $customer->id,
            (int) $customer->type
        );
        $wallet = $walletInterface->wallet;
        if (! $wallet || (float) $wallet->cash < $fee) {
            throw new \Symfony\Component\HttpKernel\Exception\UnprocessableEntityHttpException(
                'موجودی ریالی برای کارمزد سفارش شرطی کافی نیست.'
            );
        }

        new \Rooyesh\Wallet\interfaces\TransactionInterface($walletInterface, [
            'cash' => $fee,
            'expire_at' => now(),
            'note' => 'کارمزد ثبت سفارش شرطی',
            'title' => 'کارمزد سفارش شرطی',
            'active' => true,
        ], 4, true, false);

        return $fee;
    }
}