<?php

namespace App\Services;

use App\Http\Controllers\Controller;
use App\Models\Customer;
use App\Models\Price;
use App\Models\PriceTrigger;
use App\Models\Product;
use Illuminate\Support\Facades\Log;

class PriceTriggerService
{
    public function evaluateActive(array $payload = []): void
    {
        $triggers = PriceTrigger::query()->where('is_active', true)->get();
        if ($triggers->isEmpty()) {
            return;
        }

        $config = app(ConfigService::class);
        $display = app(ProductDisplayPriceService::class);
        $lastPrice = Price::query()->latest('id')->first();
        $boardPrice = (float) ($payload['price'] ?? $lastPrice?->price ?? 0);

        $productsById = collect();
        if (PriceTrigger::hasProductIdColumn()) {
            $ids = $triggers->pluck('product_id')->filter()->unique()->all();
            if ($ids !== []) {
                $productsById = Product::query()->whereIn('id', $ids)->get()->keyBy('id');
                if ($productsById->isNotEmpty()) {
                    $display->warmLivePriceCache();
                    $display->enrichForApi($productsById);
                }
            }
        }

        foreach ($triggers as $trigger) {
            try {
                $this->tryFire($trigger, $productsById, $display, $config, $boardPrice);
            } catch (\Throwable $e) {
                Log::warning('Price trigger evaluate failed', [
                    'id' => $trigger->id,
                    'message' => $e->getMessage(),
                ]);
            }
        }
    }

    private function tryFire(
        PriceTrigger $trigger,
        $productsById,
        ProductDisplayPriceService $display,
        ConfigService $config,
        float $boardPrice
    ): void {
        $product = $this->resolveProduct($trigger, $productsById);
        $current = $this->resolveCurrentPrice($trigger, $product, $display, $config, $boardPrice);
        if ($current <= 0) {
            return;
        }

        if (! $this->conditionMet((string) $trigger->price_condition, $current, (float) $trigger->target_price)) {
            return;
        }

        $customer = Customer::query()->find($trigger->customer_id);
        if (! $customer) {
            return;
        }

        $this->notify($trigger, $customer, $product, $current);

        $trigger->is_active = false;
        $trigger->triggered_at = now();
        $trigger->save();
    }

    private function resolveProduct(PriceTrigger $trigger, $productsById): ?Product
    {
        if (! PriceTrigger::hasProductIdColumn()) {
            return null;
        }

        $productId = (int) ($trigger->product_id ?? 0);
        if ($productId <= 0) {
            return null;
        }

        $product = $productsById->get($productId);
        if ($product instanceof Product) {
            return $product;
        }

        return Product::query()->find($productId);
    }

    private function resolveCurrentPrice(
        PriceTrigger $trigger,
        ?Product $product,
        ProductDisplayPriceService $display,
        ConfigService $config,
        float $boardPrice
    ): float {
        if ($product instanceof Product) {
            $enriched = (int) (($product->price ?? 0) + ($product->price_profit ?? 0));
            if ($enriched > 0) {
                return (float) $enriched;
            }

            if ($display->usesAppPrice($product)) {
                $base = $boardPrice > 0 ? $boardPrice : $display->resolveOrderBasePrice($product);
                if ($base <= 0) {
                    return 0.0;
                }

                $trade = $config->buildTradeDisplayPrices((float) $base, $config->priceProvider());
                $direction = (int) ($trigger->direction ?? 0);

                return (float) max(0, (int) ($direction === 2 ? $trade['sell'] : $trade['buy']));
            }

            return max(0.0, (float) $display->resolveOrderBasePrice($product));
        }

        if ($boardPrice <= 0) {
            return 0.0;
        }

        $direction = (int) ($trigger->direction ?? $trigger->dirction ?? 0);
        $diff = $direction === 1
            ? $config->displaySellPriceDiffRial()
            : ($direction === 2 ? $config->displayBuyPriceDiffRial() : 0.0);

        if ($direction === 1) {
            return max(0.0, $boardPrice - $diff);
        }

        if ($direction === 2) {
            return $boardPrice + $diff;
        }

        return $boardPrice;
    }

    private function conditionMet(string $op, float $current, float $target): bool
    {
        return match ($op) {
            '>' => $current > $target,
            '<' => $current < $target,
            '>=', 'gte' => $current >= $target,
            '<=', 'lte' => $current <= $target,
            '==', '=' => abs($current - $target) < 1,
            default => false,
        };
    }

    private function notify(PriceTrigger $trigger, Customer $customer, ?Product $product, float $current): void
    {
        $title = trim((string) ($product?->title ?? ''));
        if ($title === '') {
            $title = 'طلا';
        }

        $shopName = (string) Controller::Config('name_fa');
        $message = 'قیمت ' . $title . ' به ' . number_format((int) $current) . " رسید\n" . $shopName;

        if (! Controller::isSmsNotifEnabled('sms_notif_price_trigger')) {
            return;
        }

        if (trim((string) ($customer->mobile ?? '')) === '') {
            return;
        }

        Controller::Send($customer->mobile, $message);
    }
}