<?php

namespace App\Services;

use App\Models\Product;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Log;

/**
 * همگام‌سازی قیمت محصولات متغیر از فید zaarbox و فید قدیمی.
 */
class ProductPriceSyncService
{
    private const LEGACY_FEED_CACHE_KEY = 'legacy_price_list_feed';

    private const LEGACY_FEED_CACHE_SECONDS = 25;

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

    /**
     * فروشگاه (قطره / کشکول) — فید legacy + تطبیق reading_method با name
     * + اعمال price_offset_percent روی قیمت ذخیره‌شده.
     */
    public function syncStorePrices(bool $forceRefresh = true): bool
    {
        $zaarboxFeed = $this->zaarboxPriceService->cachedPriceList($forceRefresh);
        $feed = $zaarboxFeed ?? $this->cachedLegacyPriceList($forceRefresh);
        $source = $zaarboxFeed !== null ? 'zaarbox' : 'legacy';
        $sourceUrl = $source === 'zaarbox'
            ? $this->zaarboxPriceService->apiUrl()
            : 'http://212.23.201.173:8381/price_list';

        if ($feed === null) {
            // حتی بدون فید مرجع، محصولات قیمت‌اپ را با مظنه زنده همگام کن
            return $this->syncAppPriceProducts();
        }

        $products = Product::query()->whereNotNull('reading_method')->get();
        $liquidGoldPrice = (int) $this->configService->getInt('montzar_live_price', 0);
        if ($liquidGoldPrice <= 0) {
            $liquidGoldPrice = app(ProductDisplayPriceService::class)->resolveHistoricalBasePrice();
        }

        $synced = false;
        $logItems = [];

        foreach ($products as $product) {
            $row = $this->zaarboxPriceService->findFeedRow($feed, (string) $product->reading_method);
            if ($row === null) {
                continue;
            }

            $row = $this->zaarboxPriceService->normalizeFeedRow($row);
            $basePrice = (int) ($row['price'] ?? 0);
            $baseProfit = (int) ($row['profit'] ?? 0);
            $sourceName = trim((string) ($row['name'] ?? $product->reading_method));

            $result = ProductPriceService::syncFromReference($product, $basePrice, $baseProfit, $sourceName);
            if ($result !== null) {
                $logItems[] = $result;
                $synced = true;
            }

            if ((int) ($product->bubble ?? 0) === 1 && $liquidGoldPrice > 0 && $basePrice > 0) {
                $p = Product::find($product->id);
                if ($p) {
                    $p->amount = $basePrice / $liquidGoldPrice;
                    $p->save();
                }
            }
        }

        app(PriceSyncLogService::class)->record($source, $sourceUrl, $liquidGoldPrice, $logItems);

        // مثل خانگی: آبشده / قیمت‌اپ را هم با مظنه زنده در DB همگام کن (fallback نمایش)
        if ($this->syncAppPriceProducts()) {
            $synced = true;
        }

        if ($synced) {
            app(PriceBroadcastService::class)->broadcastListIfChanged();
        }

        return $synced;
    }

    /** @param bool $forceRefresh درخواست تازه از https://price.zaarbox.ir/api/free (کران) */
    public function syncAll(bool $forceRefresh = false): bool
    {
        $synced = false;

        try {
            if ($this->zaarboxPriceService->syncProductsFromApi($forceRefresh)) {
                $synced = true;
            }
        } catch (\Throwable $e) {
            Log::warning('Zaarbox product sync failed', ['message' => $e->getMessage()]);
        }

        if ($this->syncFromLegacyFeed($forceRefresh)) {
            $synced = true;
        }

        if ($this->syncAppPriceProducts()) {
            $synced = true;
        }

        if ($synced) {
            app(PriceBroadcastService::class)->broadcastListIfChanged();
        }

        return $synced;
    }

    /** محصولات آبشده با مرجع «قیمت اپ» — ذخیره آخرین قیمت در DB برای fallback */
    private function syncAppPriceProducts(): bool
    {
        $display = app(ProductDisplayPriceService::class);
        $products = Product::query()
            ->where('active', 1)
            ->get()
            ->filter(static fn (Product $product) => $display->usesAppPrice($product));

        if ($products->isEmpty()) {
            return false;
        }

        $basePrice = $display->resolveAppBasePrice();
        if ($basePrice <= 0) {
            return $this->restoreAppProductsFromHistorical($products);
        }

        $synced = false;
        foreach ($products as $product) {
            ProductPriceService::syncFromReference($product, $basePrice, 0);
            $synced = true;
        }

        return $synced;
    }

    /** provider صفر ولی use_last_price_if_zero — بازیابی از جدول prices به products.price */
    private function restoreAppProductsFromHistorical(Collection $products): bool
    {
        $historical = app(ProductDisplayPriceService::class)->resolveHistoricalBasePrice();
        if ($historical <= 0) {
            return false;
        }

        $synced = false;
        foreach ($products as $product) {
            if (!Product::hasUseLastPriceIfZeroColumn() || !($product->use_last_price_if_zero ?? false)) {
                continue;
            }
            if ((int) ($product->price ?? 0) > 0) {
                continue;
            }

            ProductPriceService::syncFromReference($product, $historical, 0);
            $synced = true;
        }

        return $synced;
    }

    /** فید قدیمی — reading_method به شکل name (سازگاری با پروژه‌های قدیمی) */
    private function syncFromLegacyFeed(bool $forceRefresh = false): bool
    {
        $RPrices = $this->cachedLegacyPriceList($forceRefresh);
        if ($RPrices === null) {
            return false;
        }

        $CP = null;
        try {
            $cooper = Http::timeout(8)->get('https://www.livedata.ir/main/static/p.json', [])->json();
            if (isset($cooper['s_301006'], $cooper['s_200103'])) {
                $CP = (($cooper['s_301006'] / 1000000) * $cooper['s_200103']) * 10;
            }
        } catch (\Throwable $e) {
            // optional copper feed
        }

        $products = Product::query()->whereNotNull('reading_method')->get();
        $synced = false;

        foreach ($products as $product) {
            $show = app(ConfigService::class)->isProductWithinTradingHours($product);

            foreach ($RPrices as $RPrice) {
                if ($product->reading_method == ($RPrice['name'] ?? null)) {
                    ProductPriceService::syncFromReference(
                        $product,
                        (int) ($RPrice['price'] ?? 0),
                        (int) ($RPrice['profit'] ?? 0)
                    );
                    $synced = true;

                    if ($product->bubble == 1) {
                        $liquidGoldPrice = app(ProductDisplayPriceService::class)->resolveAppBasePrice();
                        $p = Product::find($product->id);
                        if ($p && $liquidGoldPrice > 0) {
                            $p->amount = $RPrice['price'] / $liquidGoldPrice;
                            $p->show = $show;
                            $p->save();
                        }
                    }
                }
            }

            if ($product->reading_method == 'مس' && $CP) {
                ProductPriceService::syncFromReference($product, (int) $CP, 0);
                Product::where('id', $product->id)->update(['show' => $show]);
                $synced = true;
            }
        }

        return $synced;
    }

    /** @return array<int, array<string, mixed>>|null */
    private function cachedLegacyPriceList(bool $forceRefresh = false): ?array
    {
        if ($forceRefresh) {
            Cache::forget(self::LEGACY_FEED_CACHE_KEY);
        }

        $cached = Cache::get(self::LEGACY_FEED_CACHE_KEY);
        if (is_array($cached)) {
            return $cached;
        }

        try {
            $RPrices = Http::timeout(8)
                ->get('http://212.23.201.173:8381/price_list', [])
                ->json();
        } catch (\Throwable $e) {
            return null;
        }

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

        Cache::put(
            self::LEGACY_FEED_CACHE_KEY,
            $RPrices,
            now()->addSeconds(self::LEGACY_FEED_CACHE_SECONDS)
        );

        return $RPrices;
    }
}