<?php

namespace App\Services;

use App\Http\Controllers\Controller;
use App\Models\Order;
use App\Models\Price;
use App\Models\Product;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\Schema;
use Rooyesh\Wallet\models\Wallet;

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

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

    public function buildForCustomer(int $customerId, int $ownerType): array
    {
        $catalog = Product::query()
            ->where('active', 1)
            ->with('file')
            ->get();

        $userWallets = Wallet::query()
            ->with(['product.file'])
            ->where('owner', $customerId)
            ->where('owner_type', $ownerType)
            ->get();

        $mainWallet = $this->resolveMainWallet($userWallets);
        $metalIds = $this->catalogMetalIds($catalog);
        $weightUnit = Controller::tradeWeightUnit();
        $hasCountBased = $this->catalogHasCountBased($catalog);
        $hasWeightBased = $this->catalogHasWeightBased($catalog);

        $catalogById = $catalog->keyBy('id');

        // محصولات متصل به کیف اصلی (main_wallet_products) — موجودی‌شان = gold کیف اصلی
        $mainWalletProductIds = $this->configService->mainWalletProductIds();

        $metalsWithProductWallet = $this->metalIdsWithProductWallet($userWallets, $catalogById, $mainWalletProductIds, $mainWallet);
        $inventoryCards = array_merge(
            $this->buildMeltedInventoryCards($catalog, $catalogById, $mainWallet, $metalIds, $metalsWithProductWallet, $mainWalletProductIds),
            $this->buildInventoryCards($userWallets, $catalogById, $mainWalletProductIds, $mainWallet),
        );
        $metalTotals = $this->buildMetalTotals($userWallets, $mainWallet, $metalIds, $weightUnit, $catalogById, $metalsWithProductWallet, $mainWalletProductIds);
        $cashWallet = $this->walletBalanceService->mainWalletCash($userWallets);
        $assetsRialValue = $this->sumAssetsRialValue(
            $metalTotals,
            $userWallets,
            $catalogById,
            $mainWalletProductIds
        );
        $totalRialValue = $cashWallet + $assetsRialValue;
        $portfolio = $this->buildPortfolioInsight(
            $customerId,
            $metalTotals,
            $cashWallet,
            $assetsRialValue,
            $totalRialValue
        );

        return [
            'meta' => [
                'metal_ids' => $metalIds,
                'metal_count' => count($metalIds),
                'has_count_based_products' => $hasCountBased,
                'has_weight_based_products' => $hasWeightBased,
                'weight_unit' => $weightUnit,
                'single_metal' => count($metalIds) === 1,
            ],
            'cash_wallet' => round($cashWallet, 0),
            'inventory_cards' => $inventoryCards,
            'count_products' => $hasCountBased
                ? array_values(array_filter($inventoryCards, fn (array $row) => ($row['display_type'] ?? '') === 'count'))
                : [],
            'metal_totals' => $metalTotals,
            'assets_rial_value' => round($assetsRialValue, 0),
            'total_rial_value' => round($totalRialValue, 0),
            'profit_loss' => $portfolio['unrealized_profit_rial'],
            'portfolio' => $portfolio,
        ];
    }

    /**
     * خلاصه دارایی برای داشبورد — ارزش کل، تفکیک نقد/فلز، سود/زیان تحقق‌نیافته طلا.
     *
     * @return array{
     *   total_rial_value: float,
     *   cash_rial: float,
     *   metal_rial_value: float,
     *   gold_weight: float,
     *   gold_rial_value: float,
     *   average_buy_price: float|null,
     *   cost_basis_rial: float|null,
     *   unrealized_profit_rial: float|null,
     *   unrealized_profit_percent: float|null,
     *   live_gold_price: float
     * }
     */
    private function buildPortfolioInsight(
        int $customerId,
        array $metalTotals,
        float $cashWallet,
        float $assetsRialValue,
        float $totalRialValue
    ): array {
        $goldMetal = collect($metalTotals)->first(fn (array $row) => (int) ($row['metal_id'] ?? 0) === 1);
        $goldWeight = (float) ($goldMetal['total_weight'] ?? 0);
        $liveGoldPrice = $this->resolveLivePricePerUnit(1);
        $goldRialValue = $goldWeight > 0 && $liveGoldPrice > 0
            ? round($goldWeight * $liveGoldPrice, 0)
            : 0.0;

        $averageBuyPrice = null;
        $costBasisRial = null;
        $unrealizedProfitRial = null;
        $unrealizedProfitPercent = null;

        if ($goldWeight > 0) {
            $buyOrders = Order::query()
                ->where('customer_id', $customerId)
                ->where('direction', 1)
                ->where('sts', 2)
                ->where('amount', '>', 0)
                ->get(['amount', 'price']);

            $totalBought = (float) $buyOrders->sum('amount');
            $weightedSum = (float) $buyOrders->sum(fn (Order $order) => (float) $order->price * (float) $order->amount);

            if ($totalBought > 0 && $weightedSum > 0) {
                $averageBuyPrice = round($weightedSum / $totalBought, 0);
                $costBasisRial = round($averageBuyPrice * $goldWeight, 0);
                $unrealizedProfitRial = round($goldRialValue - $costBasisRial, 0);
                if ($costBasisRial > 0) {
                    $unrealizedProfitPercent = round(($unrealizedProfitRial / $costBasisRial) * 100, 2);
                }
            }
        }

        return [
            'total_rial_value' => round($totalRialValue, 0),
            'cash_rial' => round($cashWallet, 0),
            'metal_rial_value' => round($assetsRialValue, 0),
            'gold_weight' => round($goldWeight, 3),
            'gold_rial_value' => $goldRialValue,
            'average_buy_price' => $averageBuyPrice,
            'cost_basis_rial' => $costBasisRial,
            'unrealized_profit_rial' => $unrealizedProfitRial,
            'unrealized_profit_percent' => $unrealizedProfitPercent,
            'live_gold_price' => round($liveGoldPrice, 0),
        ];
    }

    private function catalogMetalIds(Collection $catalog): array
    {
        return $catalog
            ->pluck('metal_id')
            ->filter(fn ($id) => (int) $id > 0)
            ->map(fn ($id) => (int) $id)
            ->unique()
            ->sort()
            ->values()
            ->all();
    }

    private function catalogHasCountBased(Collection $catalog): bool
    {
        return $catalog->contains(fn (Product $product) => $this->isCountBasedProduct($product));
    }

    private function catalogHasWeightBased(Collection $catalog): bool
    {
        return $catalog->contains(fn (Product $product) => !$this->isCountBasedProduct($product));
    }

    private function buildMeltedInventoryCards(
        Collection $catalog,
        Collection $catalogById,
        ?Wallet $mainWallet,
        array $metalIds,
        array $metalsWithProductWallet = [],
        array $mainWalletProductIds = []
    ): array {
        $cards = [];
        $mainWalletGrams = Controller::weightToGrams((float) ($mainWallet?->gold ?? 0));
        $assignedMetalIds = [];
        $mainProductId = $this->configService->mainProductId();

        // حالت صریح: محصولات متصل به کیف اصلی — یک کارت واحد (نماینده = اولین محصول لیست)
        if ($mainWalletProductIds !== []) {
            $representative = $this->resolveMainWalletRepresentative($catalogById, $mainWalletProductIds);
            if (!$representative) {
                return [];
            }

            $mainWalletWeight = (float) ($mainWallet?->gold ?? 0);
            if ($mainWalletWeight <= 0) {
                return [];
            }

            $productPayload = $this->productPayload($representative);

            return [[
                'product_id' => (int) $representative->id,
                'title' => (string) $representative->title,
                'group_type' => $this->meltedGroupTypeLabel($representative),
                'metal_id' => (int) ($representative->metal_id ?? 0),
                'quantity' => round($mainWalletWeight, 3),
                'unit' => Controller::productQuantityUnit($productPayload),
                'display_type' => 'weight',
                'unit_weight' => $this->productUnitWeightLabel($representative),
                'show_in_assets' => $this->shouldShowInAssets($representative),
                'is_melted' => true,
                'is_main_wallet' => true,
                'file' => $this->filePayload($representative),
            ]];
        }

        foreach ($metalIds as $metalId) {
            if (
                $metalId <= 0
                || in_array($metalId, $assignedMetalIds, true)
                || in_array((int) $metalId, $metalsWithProductWallet, true)
            ) {
                continue;
            }

            $meltedGrams = $this->meltedGramsForMetalTotal($mainWalletGrams, (int) $metalId, $metalIds);
            if ($meltedGrams <= 0) {
                continue;
            }

            $catalogProduct = $this->resolveDisplayProductForMetal($catalog, (int) $metalId, $mainProductId);
            if (!$catalogProduct) {
                continue;
            }

            $assignedMetalIds[] = (int) $metalId;
            $productPayload = $this->productPayload($catalogProduct);

            $cards[] = [
                'product_id' => (int) $catalogProduct->id,
                'title' => (string) $catalogProduct->title,
                'group_type' => $this->meltedGroupTypeLabel($catalogProduct),
                'metal_id' => (int) $metalId,
                'quantity' => round(Controller::gramsToTradeUnit($meltedGrams), 3),
                'unit' => Controller::productQuantityUnit($productPayload),
                'display_type' => 'weight',
                'unit_weight' => $this->productUnitWeightLabel($catalogProduct),
                'show_in_assets' => $this->shouldShowInAssets($catalogProduct),
                'is_melted' => true,
                'file' => $this->filePayload($catalogProduct),
            ];
        }

        return $cards;
    }

    private function resolveMainWallet(Collection $userWallets): ?Wallet
    {
        return $userWallets->first(
            fn (Wallet $w) => $w->fund_id === null && $w->product_id === null
        );
    }

    /**
     * کیف legacy محصول آبشده/کاتد — وقتی همان فلز روی کیف اصلی موجودی دارد نباید دوباره شمرده شود.
     */
    private function shouldIgnoreLegacyProductWalletLine(
        Product $catalogProduct,
        ?Wallet $mainWallet,
        Collection $catalogById,
        array $mainWalletProductIds
    ): bool {
        if (in_array((int) $catalogProduct->id, $mainWalletProductIds, true)) {
            return true;
        }

        if ((float) ($mainWallet?->gold ?? 0) <= 0) {
            return false;
        }

        if (!$this->isMeltedTradeProduct($catalogProduct)) {
            return false;
        }

        $mainMetalId = $this->resolveMainWalletMetalId($mainWallet, $catalogById, $mainWalletProductIds);

        return $mainMetalId > 0 && (int) ($catalogProduct->metal_id ?? 0) === $mainMetalId;
    }

    private function resolveMainWalletMetalId(
        ?Wallet $mainWallet,
        Collection $catalogById,
        array $mainWalletProductIds
    ): int {
        if ($mainWalletProductIds !== []) {
            $representative = $this->resolveMainWalletRepresentative($catalogById, $mainWalletProductIds);
            if ($representative) {
                return max(1, (int) ($representative->metal_id ?? 1));
            }
        }

        if ((float) ($mainWallet?->gold ?? 0) <= 0) {
            return 0;
        }

        $mainProductId = $this->configService->mainProductId();
        if ($mainProductId) {
            $mainProduct = $catalogById->get((int) $mainProductId);
            if ($mainProduct) {
                return max(1, (int) ($mainProduct->metal_id ?? 1));
            }
        }

        return 1;
    }

    private function catalogProduct(Product $product, Collection $catalogById): Product
    {
        return $catalogById->get((int) $product->id) ?? $product;
    }

    /**
     * محصولات آبشده: دسته «آبشده»/«کاتد مس» + محصول اصلی تنظیمات (main_product).
     */
    private function resolveMeltedProducts(Collection $catalog): Collection
    {
        $mainProductId = $this->configService->mainProductId();

        return $catalog
            ->filter(fn (Product $product) => $this->isMeltedCatalogProduct($product, $mainProductId))
            ->sortBy(fn (Product $product) => $this->isMainMeltedProduct($product, $mainProductId) ? 0 : 1)
            ->values();
    }

    private function isMeltedCatalogProduct(Product $product, ?int $mainProductId): bool
    {
        if ($mainProductId && (int) $product->id === (int) $mainProductId) {
            return true;
        }

        return $this->isMeltedTradeProduct($product);
    }

    private function isMainMeltedProduct(Product $product, ?int $mainProductId): bool
    {
        return $mainProductId !== null && (int) $product->id === (int) $mainProductId;
    }

    private function isMeltedTradeProduct(Product $product): bool
    {
        $group = trim((string) ($product->group_type ?? ''));

        return in_array($group, ['آبشده', 'کاتد مس'], true);
    }

    private function meltedGroupTypeLabel(Product $product): string
    {
        $group = trim((string) ($product->group_type ?? ''));

        return $group !== '' ? $group : 'آبشده';
    }

    /** اولین محصولِ لیست main_wallet_products که در کاتالوگ فعال است. */
    private function resolveMainWalletRepresentative(Collection $catalogById, array $mainWalletProductIds): ?Product
    {
        foreach ($mainWalletProductIds as $productId) {
            $product = $catalogById->get((int) $productId);
            if ($product) {
                return $product;
            }
        }

        return null;
    }

    /** فلزهایی که کاربر روی کیف محصول موجودی دارد — برای جلوگیری از کارت آبشدهٔ تکراری. */
    private function metalIdsWithProductWallet(
        Collection $userWallets,
        Collection $catalogById,
        array $mainWalletProductIds = [],
        ?Wallet $mainWallet = null
    ): array {
        $metalIds = [];
        $mainWallet ??= $this->resolveMainWallet($userWallets);

        foreach ($userWallets as $walletLine) {
            if ($walletLine->product_id === null || (float) $walletLine->gold <= 0) {
                continue;
            }

            // کیف محصولاتِ متصل به کیف اصلی نادیده گرفته می‌شود
            if (in_array((int) $walletLine->product_id, $mainWalletProductIds, true)) {
                continue;
            }

            $product = $walletLine->product;
            if (!$product) {
                continue;
            }

            $catalogProduct = $this->catalogProduct($product, $catalogById);
            if ($this->shouldIgnoreLegacyProductWalletLine($catalogProduct, $mainWallet, $catalogById, $mainWalletProductIds)) {
                continue;
            }

            $metalId = (int) ($catalogProduct->metal_id ?? 0);
            if ($metalId > 0) {
                $metalIds[] = $metalId;
            }
        }

        return array_values(array_unique($metalIds));
    }

    /** محصول نمایشی برای موجودی کیف اصلی هر فلز. */
    private function resolveDisplayProductForMetal(
        Collection $catalog,
        int $metalId,
        ?int $mainProductId
    ): ?Product {
        if ($mainProductId) {
            $mainProduct = $catalog->firstWhere('id', $mainProductId);
            if ($mainProduct && (int) ($mainProduct->metal_id ?? 0) === $metalId) {
                return $mainProduct;
            }
        }

        foreach ($this->resolveMeltedProducts($catalog) as $product) {
            if ((int) ($product->metal_id ?? 0) === $metalId) {
                return $product;
            }
        }

        return $catalog->first(fn (Product $product) => (int) ($product->metal_id ?? 0) === $metalId);
    }

    private function buildInventoryCards(
        Collection $userWallets,
        Collection $catalogById,
        array $mainWalletProductIds = [],
        ?Wallet $mainWallet = null
    ): array {
        $cards = [];
        $mainWallet ??= $this->resolveMainWallet($userWallets);

        foreach ($userWallets as $walletLine) {
            if ($walletLine->fund_id !== null) {
                continue;
            }

            if ($walletLine->product_id === null || (float) $walletLine->gold <= 0) {
                continue;
            }

            // محصول متصل به کیف اصلی دارایی جدا ندارد — کارتش از کیف اصلی ساخته می‌شود
            if (in_array((int) $walletLine->product_id, $mainWalletProductIds, true)) {
                continue;
            }

            $product = $walletLine->product;
            if (!$product) {
                continue;
            }

            $catalogProduct = $this->catalogProduct($product, $catalogById);
            if ($this->shouldIgnoreLegacyProductWalletLine($catalogProduct, $mainWallet, $catalogById, $mainWalletProductIds)) {
                continue;
            }

            $productPayload = $this->productPayload($catalogProduct);
            $isCountBased = $this->isCountBasedProduct($catalogProduct);

            $cards[] = [
                'product_id' => (int) $catalogProduct->id,
                'title' => (string) $catalogProduct->title,
                'group_type' => (string) ($catalogProduct->group_type ?? ''),
                'metal_id' => (int) ($catalogProduct->metal_id ?? 0),
                'quantity' => round((float) $walletLine->gold, 3),
                'unit' => Controller::productQuantityUnit($productPayload),
                'display_type' => $isCountBased ? 'count' : 'weight',
                'unit_weight' => $this->productUnitWeightLabel($catalogProduct),
                'show_in_assets' => $this->shouldShowInAssets($catalogProduct),
                'file' => $this->filePayload($catalogProduct),
            ];
        }

        return $cards;
    }

    private function buildMetalTotals(
        Collection $userWallets,
        ?Wallet $mainWallet,
        array $metalIds,
        string $weightUnit,
        Collection $catalogById,
        array $metalsWithProductWallet = [],
        array $mainWalletProductIds = []
    ): array {
        if ($metalIds === []) {
            return [];
        }

        $mainWalletGrams = Controller::weightToGrams((float) ($mainWallet?->gold ?? 0));
        $totals = [];

        // فلز نمایندهٔ کیف اصلی در حالت main_wallet_products
        $mainWalletMetalId = null;
        if ($mainWalletProductIds !== []) {
            $representative = $this->resolveMainWalletRepresentative($catalogById, $mainWalletProductIds);
            $mainWalletMetalId = $representative ? (int) ($representative->metal_id ?? 0) : null;
        }

        foreach ($metalIds as $metalId) {
            $productGrams = 0.0;

            foreach ($userWallets as $walletLine) {
                if ($walletLine->product_id === null || !$walletLine->product) {
                    continue;
                }

                // کیف محصولاتِ متصل به کیف اصلی جداگانه شمرده نمی‌شود
                if (in_array((int) $walletLine->product_id, $mainWalletProductIds, true)) {
                    continue;
                }

                $catalogProduct = $this->catalogProduct($walletLine->product, $catalogById);
                if ($this->shouldIgnoreLegacyProductWalletLine($catalogProduct, $mainWallet, $catalogById, $mainWalletProductIds)) {
                    continue;
                }

                if ((int) ($catalogProduct->metal_id ?? 0) !== (int) $metalId) {
                    continue;
                }

                if ((string) ($catalogProduct->group_type ?? '') === 'سکه') {
                    continue;
                }

                $productGrams += Controller::productLineWeightToGrams(
                    $catalogProduct,
                    $walletLine->gold
                );
            }

            if ($mainWalletProductIds !== []) {
                // حالت صریح: کیف اصلی فقط یک‌بار، زیر فلزِ محصول نماینده
                $meltedGrams = ($mainWalletMetalId !== null && (int) $metalId === $mainWalletMetalId)
                    ? $mainWalletGrams
                    : 0.0;
            } else {
                // کیف اصلی فقط برای فلزی که هیچ کیف محصولی ندارد به مجموع اضافه می‌شود.
                $meltedGrams = in_array((int) $metalId, $metalsWithProductWallet, true)
                    ? 0.0
                    : $this->meltedGramsForMetalTotal($mainWalletGrams, $metalId, $metalIds);
            }
            $productWeight = round(Controller::gramsToTradeUnit($productGrams), 3);
            $meltedWeight = round(Controller::gramsToTradeUnit($meltedGrams), 3);
            $totalWeight = round($productWeight + $meltedWeight, 3);

            $totals[] = [
                'metal_id' => (int) $metalId,
                'metal_label' => self::METAL_LABELS[$metalId] ?? 'فلز',
                'label' => 'کل دارایی ' . (self::METAL_LABELS[$metalId] ?? 'فلز'),
                'product_weight' => $productWeight,
                'melted_weight' => $meltedWeight,
                'total_weight' => $totalWeight,
                'unit' => $weightUnit,
            ];
        }

        return $totals;
    }

    /** جمع واقعی کیف اصلی برای هر فلز — مستقل از show_in_assets. */
    private function meltedGramsForMetalTotal(
        float $mainWalletGrams,
        int $metalId,
        array $catalogMetalIds
    ): float {
        if ($mainWalletGrams <= 0) {
            return 0.0;
        }

        if (count($catalogMetalIds) === 1) {
            return (int) $catalogMetalIds[0] === (int) $metalId ? $mainWalletGrams : 0.0;
        }

        return (int) $metalId === 1 ? $mainWalletGrams : 0.0;
    }

    /**
     * ارزش ریالی دارایی‌های فلزی:
     * • وزن کل هر فلز × قیمت زنده
     * • سکه‌ها (خارج از جمع وزن) × قیمت محصول
     */
    private function sumAssetsRialValue(
        array $metalTotals,
        Collection $userWallets,
        Collection $catalogById,
        array $mainWalletProductIds = []
    ): float {
        $total = 0.0;

        foreach ($metalTotals as $metal) {
            $weight = (float) ($metal['total_weight'] ?? 0);
            if ($weight <= 0) {
                continue;
            }

            $livePrice = $this->resolveLivePricePerUnit((int) ($metal['metal_id'] ?? 0));
            if ($livePrice > 0) {
                $total += $weight * $livePrice;
            }
        }

        foreach ($userWallets as $walletLine) {
            if ($walletLine->product_id === null || !$walletLine->product || (float) $walletLine->gold <= 0) {
                continue;
            }

            if (in_array((int) $walletLine->product_id, $mainWalletProductIds, true)) {
                continue;
            }

            $catalogProduct = $this->catalogProduct($walletLine->product, $catalogById);
            if ((string) ($catalogProduct->group_type ?? '') !== 'سکه') {
                continue;
            }

            $total += $this->productDisplayUnitPrice($catalogProduct) * (float) $walletLine->gold;
        }

        return $total;
    }

    private function resolveLivePricePerUnit(int $metalId): float
    {
        if ($metalId === 1) {
            $live = (int) app(ProductDisplayPriceService::class)->resolveAppBasePrice();
            if ($live > 0) {
                return (float) $live;
            }

            return (float) (Price::latest('id')->value('price') ?? 0);
        }

        $product = Product::query()
            ->where('active', 1)
            ->where('metal_id', $metalId)
            ->where('price', '>', 0)
            ->orderBy('id')
            ->first();

        if (!$product) {
            return 0.0;
        }

        $unitPrice = $this->productDisplayUnitPrice($product);
        $amount = (float) ($product->amount ?? 1);

        return $amount > 0 ? $unitPrice * $amount : $unitPrice;
    }

    private function productDisplayUnitPrice(Product $product): float
    {
        return (float) ($product->price ?? 0) + (float) ($product->price_profit ?? 0);
    }

    private function shouldShowInAssets(Product $product): bool
    {
        if (!Product::hasShowInAssetsColumn()) {
            return true;
        }

        return (bool) ($product->show_in_assets ?? false);
    }

    private function isCountBasedProduct(Product $product): bool
    {
        return Controller::isCountBasedProduct($this->productPayload($product));
    }

    private function productPayload(Product $product): array
    {
        return [
            'unit' => $product->unit ?? null,
            'direct_price' => $product->direct_price ?? null,
            'group_type' => $product->group_type ?? null,
            'amount' => $product->amount ?? null,
            'trade_by_quantity' => $product->trade_by_quantity ?? null,
        ];
    }

    private function productUnitWeightLabel(Product $product): ?string
    {
        if (!$this->isCountBasedProduct($product)) {
            return null;
        }

        if (!Controller::hasProductUnitWeight($this->productPayload($product))) {
            return null;
        }

        $amount = (float) ($product->amount ?? 0);
        $unit = Controller::productStorageWeightUnit($product);

        return trim($amount . ' ' . $unit);
    }

    private function filePayload(Product $product): ?array
    {
        if (!$product->relationLoaded('file') || !$product->file) {
            return null;
        }

        $fileModel = $product->file;
        $src = (string) ($fileModel->src ?? '');

        return [
            'id' => $fileModel->id,
            'src' => $src,
            'full_src' => $src,
            'url' => $fileModel->url ?? null,
        ];
    }
}