<?php

namespace App\Module\Mex\Logic;

use App\Module\Fund\Services\FundService;
use App\Module\Fund\Enums\FUND_TYPE;
use App\Module\Fund\Enums\FUND_CURRENCY_TYPE;
use App\Module\Game\Enums\REWARD_SOURCE_TYPE;
use App\Module\GameItems\Services\ItemService;
use App\Module\Mex\Logic\MexTransactionLogic;
use App\Module\Mex\Logic\MexWarehouseLogic;
use App\Module\Mex\Logic\FundLogic;
use App\Module\Mex\Enums\TransactionType;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;

/**
 * 农贸市场账户流转逻辑
 *
 * 处理用户与仓库账户之间的资金和物品流转
 * 仓库账户USER_ID为15，调控账户USER_ID为16
 * 支持多币种交易，默认使用钻石币种
 */
class MexAccountLogic
{
    // 仓库账户ID
    const WAREHOUSE_USER_ID = 15;

    // 调控账户ID
    const REGULATION_USER_ID = 16;

    /**
     * 处理用户卖出订单的账户流转
     * 用户卖出：资金从仓库转出到用户、物品从用户转入仓库
     *
     * @param int $userId 用户ID
     * @param int $itemId 商品ID
     * @param int $quantity 数量
     * @param string $price 单价
     * @param string $totalAmount 总金额
     * @param int $orderId 订单ID
     * @param FUND_CURRENCY_TYPE|null $currencyType 币种类型，默认使用钻石
     * @return array 操作结果
     */
    public static function processSellOrder(int $userId, int $itemId, int $quantity, string $price, string $totalAmount, int $orderId, ?FUND_CURRENCY_TYPE $currencyType = null): array
    {
        try {
            DB::beginTransaction();

            // 获取币种类型，默认使用钻石
            $currencyType = $currencyType ?? FundLogic::getDefaultCurrency();

            // 获取对应的账户类型
            $availableAccountType = FundLogic::getAvailableAccountType($currencyType);
            if (!$availableAccountType) {
                DB::rollBack();
                return ['success' => false, 'message' => '不支持的币种类型'];
            }

            // 1. 验证用户是否有足够的物品
            $checkResult = ItemService::checkItemQuantity($userId, $itemId, $quantity);
            if (!$checkResult->success) {
                DB::rollBack();
                return ['success' => false, 'message' => $checkResult->message];
            }

            // 2. 从用户扣除物品
            $consumeResult = ItemService::consumeItem($userId, $itemId, null, $quantity, [
                'reason' => 'mex_sell',
                'order_id' => $orderId,
                'remark' => "农贸市场卖出物品，订单ID：{$orderId}"
            ]);

            if (!$consumeResult['success']) {
                DB::rollBack();
                return ['success' => false, 'message' => '扣除用户物品失败：' . ($consumeResult['message'] ?? '未知错误')];
            }

            // 3. 给仓库账户添加物品
            $addResult = ItemService::addItem(self::WAREHOUSE_USER_ID, $itemId, $quantity, [
                'reason' => 'mex_warehouse_buy',
                'source_type'    => REWARD_SOURCE_TYPE::MEX_BUY,
                'source_id'      => $orderId,
                'order_id' => $orderId,
                'remark' => "农贸市场仓库收购物品，订单ID：{$orderId}"
            ]);

            if (!$addResult['success']) {
                DB::rollBack();
                return ['success' => false, 'message' => '仓库添加物品失败：' . ($addResult['message'] ?? '未知错误')];
            }

            // 4. 从仓库账户转出资金给用户
            $warehouseFundService = new FundService(self::WAREHOUSE_USER_ID, $availableAccountType->value);
            $precision = $currencyType->getPrecision();
            $fundAmount = (int)bcmul($totalAmount, bcpow('10', $precision), 0); // 根据币种精度转换

            $transferResult = $warehouseFundService->trade(
                $userId,
                $fundAmount,
                'mex_sell',
                $orderId,
                "农贸市场卖出收款，订单ID：{$orderId}"
            );

            if (is_string($transferResult)) {
                DB::rollBack();
                return ['success' => false, 'message' => '资金转移失败：' . $transferResult];
            }

            // 5. 更新仓库统计
            $warehouseResult = MexWarehouseLogic::addStock($itemId, $quantity, $totalAmount);
            if (!$warehouseResult) {
                DB::rollBack();
                return ['success' => false, 'message' => '更新仓库统计失败'];
            }

            // 6. 创建成交记录
            $transactionResult = MexTransactionLogic::createTransaction([
                'sell_order_id' => $orderId,
                'buyer_id' => self::WAREHOUSE_USER_ID,
                'seller_id' => $userId,
                'item_id' => $itemId,
                'currency_type' => $currencyType->value,
                'quantity' => $quantity,
                'price' => $price,
                'total_amount' => $totalAmount,
                'transaction_type' => TransactionType::USER_SELL,
                'is_admin_operation' => false,
            ]);

            if (!$transactionResult) {
                DB::rollBack();
                return ['success' => false, 'message' => '创建成交记录失败'];
            }

            DB::commit();

            return [
                'success' => true,
                'message' => '卖出订单处理成功',
                'transaction_id' => $transactionResult->id,
                'fund_transfer' => $transferResult,
                'item_consume' => $consumeResult,
                'warehouse_add' => $addResult
            ];

        } catch (\Exception $e) {
            DB::rollBack();
            Log::error('Mex卖出订单处理失败', [
                'user_id' => $userId,
                'item_id' => $itemId,
                'quantity' => $quantity,
                'order_id' => $orderId,
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);

            return ['success' => false, 'message' => '系统错误：' . $e->getMessage()];
        }
    }

    /**
     * 处理用户买入订单的账户流转
     * 用户买入：资金从用户转入仓库、物品从仓库转出到用户
     *
     * @param int $userId 用户ID
     * @param int $itemId 商品ID
     * @param int $quantity 数量
     * @param string $price 单价
     * @param string $totalAmount 总金额
     * @param int $orderId 订单ID
     * @param FUND_CURRENCY_TYPE|null $currencyType 币种类型，默认使用钻石
     * @return array 操作结果
     */
    public static function processBuyOrder(int $userId, int $itemId, int $quantity, string $price, string $totalAmount, int $orderId, ?FUND_CURRENCY_TYPE $currencyType = null): array
    {
        try {
            DB::beginTransaction();

            // 获取币种类型，默认使用钻石
            $currencyType = $currencyType ?? FundLogic::getDefaultCurrency();

            // 获取对应的账户类型
            $availableAccountType = FundLogic::getAvailableAccountType($currencyType);
            if (!$availableAccountType) {
                DB::rollBack();
                return ['success' => false, 'message' => '不支持的币种类型'];
            }

            // 1. 验证仓库是否有足够的物品
            if (!MexWarehouseLogic::checkStockSufficient($itemId, $quantity)) {
                DB::rollBack();
                return ['success' => false, 'message' => '仓库库存不足'];
            }

            // 2. 验证用户是否有足够的资金
            $userFundService = new FundService($userId, $availableAccountType->value);
            $precision = $currencyType->getPrecision();
            $fundAmount = (int)bcmul($totalAmount, bcpow('10', $precision), 0); // 根据币种精度转换

            if ($userFundService->balance() < $fundAmount) {
                DB::rollBack();
                return ['success' => false, 'message' => '用户资金不足'];
            }

            // 3. 从用户转出资金到仓库
            $transferResult = $userFundService->trade(
                self::WAREHOUSE_USER_ID,
                $fundAmount,
                'mex_buy',
                $orderId,
                "农贸市场买入付款，订单ID：{$orderId}"
            );

            if (is_string($transferResult)) {
                DB::rollBack();
                return ['success' => false, 'message' => '资金转移失败：' . $transferResult];
            }

            // 4. 从仓库扣除物品
            $consumeResult = ItemService::consumeItem(self::WAREHOUSE_USER_ID, $itemId, null, $quantity, [
                'reason' => 'mex_warehouse_sell',
                'order_id' => $orderId,
                'remark' => "农贸市场仓库出售物品，订单ID：{$orderId}"
            ]);

            if (!$consumeResult['success']) {
                DB::rollBack();
                return ['success' => false, 'message' => '仓库扣除物品失败：' . ($consumeResult['message'] ?? '未知错误')];
            }

            // 5. 给用户添加物品
            $addResult = ItemService::addItem($userId, $itemId, $quantity, [
                'reason' => 'mex_buy',
                'source_type'    => REWARD_SOURCE_TYPE::MEX_BUY,
                'source_id'      => $orderId,
                'order_id' => $orderId,
                'remark' => "农贸市场买入物品，订单ID：{$orderId}"
            ]);

            if (!$addResult['success']) {
                DB::rollBack();
                return ['success' => false, 'message' => '用户添加物品失败：' . ($addResult['message'] ?? '未知错误')];
            }

            // 6. 更新仓库统计
            $warehouseResult = MexWarehouseLogic::reduceStock($itemId, $quantity, $totalAmount);
            if (!$warehouseResult) {
                DB::rollBack();
                return ['success' => false, 'message' => '更新仓库统计失败'];
            }

            // 7. 创建成交记录
            $transactionResult = MexTransactionLogic::createTransaction([
                'buy_order_id' => $orderId,
                'buyer_id' => $userId,
                'seller_id' => self::WAREHOUSE_USER_ID,
                'item_id' => $itemId,
                'currency_type' => $currencyType->value,
                'quantity' => $quantity,
                'price' => $price,
                'total_amount' => $totalAmount,
                'transaction_type' => TransactionType::USER_BUY,
                'is_admin_operation' => false,
            ]);

            if (!$transactionResult) {
                DB::rollBack();
                return ['success' => false, 'message' => '创建成交记录失败'];
            }

            DB::commit();

            return [
                'success' => true,
                'message' => '买入订单处理成功',
                'transaction_id' => $transactionResult->id,
                'fund_transfer' => $transferResult,
                'item_consume' => $consumeResult,
                'user_add' => $addResult
            ];

        } catch (\Exception $e) {
            DB::rollBack();
            Log::error('Mex买入订单处理失败', [
                'user_id' => $userId,
                'item_id' => $itemId,
                'quantity' => $quantity,
                'order_id' => $orderId,
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);

            return ['success' => false, 'message' => '系统错误：' . $e->getMessage()];
        }
    }

    /**
     * 检查仓库账户资金余额
     *
     * @param FUND_CURRENCY_TYPE|null $currencyType 币种类型，默认使用钻石
     * @return int 余额（按币种精度存储的整数）
     */
    public static function getWarehouseFundBalance(?FUND_CURRENCY_TYPE $currencyType = null): int
    {
        $currencyType = $currencyType ?? FundLogic::getDefaultCurrency();
        $availableAccountType = FundLogic::getAvailableAccountType($currencyType);

        if (!$availableAccountType) {
            return 0;
        }

        $warehouseFundService = new FundService(self::WAREHOUSE_USER_ID, $availableAccountType->value);
        return $warehouseFundService->balance();
    }

    /**
     * 检查调控账户资金余额
     *
     * @param FUND_CURRENCY_TYPE|null $currencyType 币种类型，默认使用钻石
     * @return int 余额（按币种精度存储的整数）
     */
    public static function getRegulationFundBalance(?FUND_CURRENCY_TYPE $currencyType = null): int
    {
        $currencyType = $currencyType ?? FundLogic::getDefaultCurrency();
        $availableAccountType = FundLogic::getAvailableAccountType($currencyType);

        if (!$availableAccountType) {
            return 0;
        }

        $regulationFundService = new FundService(self::REGULATION_USER_ID, $availableAccountType->value);
        return $regulationFundService->balance();
    }
}