<?php

namespace app\common\service;

use think\facade\Db;
use think\facade\Log;

class CommissionService
{


    /**
     * 获取分销设置
     */
    public function getDistributionSetting()
    {
        $setting = Db::table('ba_distribution_setting')
            ->order('id', 'desc')
            ->find();
        // 如果没有设置，返回默认值
        if (!$setting) {
            $setting = [
                'default_rate' => 0.10, // 10%
                'min_withdrawal' => 10.00,
                'max_withdrawal' => 10000.00,
                'withdrawal_fee_rate' => 0.01, // 1%
            ];
        }

        return $setting;
    }

    /**
     * 计算佣金
     */
    public function calculateCommission($orderAmount, $distributorId = 0)
    {
        if ($distributorId <= 0) {
            return [
                'has_commission' => false,
                'commission_rate' => 0,
                'commission_amount' => 0
            ];
        }

        $setting = $this->getDistributionSetting();
        $commissionRate = ($setting['default_rate']/100) ?? 0.10;

        // 计算佣金金额
        $commissionAmount = bcmul($orderAmount, $commissionRate, 2);

        return [
            'has_commission' => true,
            'commission_rate' => $commissionRate,
            'commission_amount' => $commissionAmount,
            'setting' => $setting
        ];
    }


    /**
     * 创建分销记录
     */
    public function createDistributionRecord($data)
    {
        $recordData = [
            'order_id' => $data['order_id'] ?? 0,
            'product_id' => $data['product_id'] ?? 0,
            'buyer_id' => $data['buyer_id'] ?? 0,
            'distributor_id' => $data['distributor_id'] ?? 0,
            'commission_rate' => $data['commission_rate'] ?? 0,
            'commission_amount' => $data['commission_amount'] ?? 0,
            'status' => 1, // 1=待结算
            'create_time' => date('Y-m-d H:i:s')
        ];

        return Db::table('ba_distribution_record')->insertGetId($recordData);
    }

    /**
     * 更新分销记录状态
     */
    public function updateDistributionRecord($orderId, $status, $settleTime = null)
    {
        $updateData = [
            'status' => $status,
            'update_time' => date('Y-m-d H:i:s')
        ];

        if ($settleTime) {
            $updateData['settle_time'] = $settleTime;
        }

        return Db::table('ba_distribution_record')
            ->where('order_id', $orderId)
            ->update($updateData);
    }

    /**
     * 获取用户佣金统计
     */
    public function getUserCommissionSummary($userId)
    {
        $summary = Db::table('ba_distribution_record')
            ->where('distributor_id', $userId)
            ->field('
                COUNT(*) as total_orders,
                SUM(CASE WHEN status = 1 THEN commission_amount ELSE 0 END) as pending_amount,
                SUM(CASE WHEN status = 2 THEN commission_amount ELSE 0 END) as settled_amount,
                SUM(CASE WHEN status = 3 THEN commission_amount ELSE 0 END) as canceled_amount
            ')
            ->find();

        return $summary ?: [
            'total_orders' => 0,
            'pending_amount' => 0,
            'settled_amount' => 0,
            'canceled_amount' => 0
        ];
    }

    /**
     * 更新用户佣金表
     */
    public function updateUserCommission($userId)
    {
        $summary = $this->getUserCommissionSummary($userId);

        // 已结算的佣金可以作为当前佣金（可提现）
        $currentCommission = $summary['settled_amount'] ?? 0;
        $totalCommission = $summary['settled_amount'] + $summary['pending_amount'];

        // 检查用户佣金表是否有记录
        $userCommission = Db::table('ba_user_commission')
            ->where('user_id', $userId)
            ->find();

        $data = [
            'total_commission' => $totalCommission,
            'current_commission' => $currentCommission,
            'update_time' => date('Y-m-d H:i:s')
        ];

        if ($userCommission) {
            // 更新
            Db::table('ba_user_commission')
                ->where('user_id', $userId)
                ->update($data);
        } else {
            // 创建
            $data['user_id'] = $userId;
            $data['promotion_link'] = $this->generatePromotionLink($userId);
            Db::table('ba_user_commission')->insert($data);
        }
    }


    /**
     * 处理订单佣金
     */
    public function processOrderCommission(int $orderId): bool
    {
        try {
            // 获取订单信息
            $order = Db::name('order')
                ->where('id', $orderId)
                ->where('pay_status', 1) // 已支付
                ->where('order_status', 'IN', [1, 3]) // 已确认或已完成
                ->where('is_commission', 0) // 未处理佣金
                ->find();

            if (!$order) {
                Log::info("订单不满足佣金处理条件: {$orderId}");
                return false;
            }

            // 如果有分销人，处理佣金
            if (!empty($order['distributor_id']) && $order['commission_amount'] > 0) {
                $distributorId = $order['distributor_id'];
                $commissionAmount = $order['commission_amount'];

                // 更新分销人佣金
                $this->addCommission($distributorId, $commissionAmount, [
                    'type' => 2, // 订单佣金
                    'order_id' => $orderId,
                    'from_user_id' => $order['user_id'],
                    'remark' => '订单佣金：' . $order['order_no'] . '，金额：¥' . $commissionAmount
                ]);

                // 标记订单佣金已处理
                Db::name('order')
                    ->where('id', $orderId)
                    ->update([
                        'is_commission' => 1,
                        'update_time' => date('Y-m-d H:i:s')
                    ]);

                Log::info("订单佣金处理成功: 订单ID={$orderId}, 分销人ID={$distributorId}, 佣金={$commissionAmount}");
            }

            return true;
        } catch (\Throwable $e) {
            Log::error("处理订单佣金失败: " . $e->getMessage());
            return false;
        }
    }

    /**
     * 增加佣金
     */
    public function addCommission(int $userId, float $amount, array $extra = []): bool
    {
        try {
            if ($amount <= 0) {
                return false;
            }

            Db::startTrans();

            // 获取当前佣金
            $commission = Db::name('user_commission')
                ->where('user_id', $userId)
                ->lock(true)
                ->find();

            $balanceBefore = $commission ? $commission['current_commission'] : 0;
            $balanceAfter = $balanceBefore + $amount;

            if ($commission) {
                // 更新现有记录
                Db::name('user_commission')
                    ->where('user_id', $userId)
                    ->update([
                        'total_commission' => Db::raw('total_commission + ' . $amount),
                        'current_commission' => Db::raw('current_commission + ' . $amount),
                        'update_time' => date('Y-m-d H:i:s')
                    ]);
            } else {
                // 创建新记录
                $promotionLink = $this->generatePromotionLink($userId);

                Db::name('user_commission')->insert([
                    'user_id' => $userId,
                    'total_commission' => $amount,
                    'current_commission' => $amount,
                    'withdrawn_commission' => 0.00,
                    'frozen_commission' => 0.00,
                    'promotion_link' => $promotionLink,
                    'invitation_count' => 0,
                    'total_invitation' => 0,
                    'update_time' => date('Y-m-d H:i:s')
                ]);
            }

            // 记录佣金流水
            Db::name('commission_flow')->insert([
                'user_id' => $userId,
                'order_id' => $extra['order_id'] ?? null,
                'from_user_id' => $extra['from_user_id'] ?? null,
                'type' => $extra['type'] ?? 1,
                'amount' => $amount,
                'balance_before' => $balanceBefore,
                'balance_after' => $balanceAfter,
                'remark' => $extra['remark'] ?? ('佣金增加：¥' . $amount),
                'create_time' => date('Y-m-d H:i:s')
            ]);

            Db::commit();
            return true;
        } catch (\Throwable $e) {
            Db::rollback();
            Log::error("增加佣金失败: " . $e->getMessage());
            return false;
        }
    }

    /**
     * 处理提现
     */
    public function processWithdrawal(int $withdrawalId): bool
    {
        try {
            $withdrawal = Db::name('withdrawal_record')
                ->where('id', $withdrawalId)
                ->where('status', 0) // 待审核
                ->lock(true)
                ->find();

            if (!$withdrawal) {
                Log::warning("提现记录不存在或状态不符: {$withdrawalId}");
                return false;
            }

            $userId = $withdrawal['user_id'];
            $amount = $withdrawal['amount'];

            // 检查用户佣金是否足够
            $commission = Db::name('user_commission')
                ->where('user_id', $userId)
                ->find();

            if (!$commission || $commission['current_commission'] < $amount) {
                Log::warning("用户佣金不足: 用户ID={$userId}, 需要={$amount}, 当前={$commission['current_commission']}");
                return false;
            }

            Db::startTrans();

            // 扣除佣金
            $newCurrent = $commission['current_commission'] - $amount;
            $newWithdrawn = $commission['withdrawn_commission'] + $amount;

            Db::name('user_commission')
                ->where('user_id', $userId)
                ->update([
                    'current_commission' => $newCurrent,
                    'withdrawn_commission' => $newWithdrawn,
                    'update_time' => date('Y-m-d H:i:s')
                ]);

            // 记录佣金流水
            Db::name('commission_flow')->insert([
                'user_id' => $userId,
                'type' => 3, // 提现扣除
                'amount' => -$amount,
                'balance_before' => $commission['current_commission'],
                'balance_after' => $newCurrent,
                'remark' => '提现扣除：' . $withdrawal['withdrawal_no'] . '，金额：¥' . $amount,
                'create_time' => date('Y-m-d H:i:s')
            ]);

            // 更新提现记录状态为审核通过（实际打款需要另外处理）
            Db::name('withdrawal_record')
                ->where('id', $withdrawalId)
                ->update([
                    'status' => 1, // 审核通过
                    'audit_time' => date('Y-m-d H:i:s'),
                    'current_balance' => $commission['current_commission'],
                    'balance_after' => $newCurrent,
                    'update_time' => date('Y-m-d H:i:s')
                ]);

            Db::commit();

            Log::info("提现处理成功: 提现ID={$withdrawalId}, 用户ID={$userId}, 金额={$amount}");

            return true;
        } catch (\Throwable $e) {
            Db::rollback();
            Log::error("处理提现失败: " . $e->getMessage());
            return false;
        }
    }

    /**
     * 获取用户佣金详情
     */
    public function getUserCommissionDetail(int $userId): array
    {
        try {
            // 佣金信息
            $commission = Db::name('user_commission')
                ->where('user_id', $userId)
                ->find();

            if (!$commission) {
                $commission = [
                    'total_commission' => 0.00,
                    'current_commission' => 0.00,
                    'withdrawn_commission' => 0.00,
                    'frozen_commission' => 0.00,
                    'promotion_link' => $this->generatePromotionLink($userId),
                    'invitation_count' => 0,
                    'total_invitation' => 0
                ];
            }

            // 最近佣金流水
            $flows = Db::name('commission_flow')
                ->where('user_id', $userId)
                ->order('create_time', 'desc')
                ->limit(50)
                ->select()
                ->toArray();

            // 统计今日/本月佣金
            $todayStart = date('Y-m-d 00:00:00');
            $monthStart = date('Y-m-01 00:00:00');

            $todayIncome = Db::name('commission_flow')
                ->where('user_id', $userId)
                ->where('amount', '>', 0)
                ->where('create_time', '>=', $todayStart)
                ->sum('amount');

            $monthIncome = Db::name('commission_flow')
                ->where('user_id', $userId)
                ->where('amount', '>', 0)
                ->where('create_time', '>=', $monthStart)
                ->sum('amount');

            return [
                'commission' => $commission,
                'flows' => $flows,
                'stats' => [
                    'today_income' => $todayIncome ?: 0,
                    'month_income' => $monthIncome ?: 0
                ]
            ];
        } catch (\Throwable $e) {
            Log::error("获取用户佣金详情失败: " . $e->getMessage());
            return [
                'commission' => [
                    'total_commission' => 0.00,
                    'current_commission' => 0.00,
                    'withdrawn_commission' => 0.00,
                    'frozen_commission' => 0.00,
                    'promotion_link' => '',
                    'invitation_count' => 0,
                    'total_invitation' => 0
                ],
                'flows' => [],
                'stats' => [
                    'today_income' => 0,
                    'month_income' => 0
                ]
            ];
        }
    }


    /**
     * 生成唯一邀请码
     */
    public function generateInvitationCode(): string
    {
        $maxAttempts = 10;
        $attempts = 0;

        while ($attempts < $maxAttempts) {
            // 方法1：使用数字+字母组合
            $chars = 'ABCDEFGHJKLMNPQRSTUVWXYZ23456789'; // 去掉容易混淆的字符
            $code = '';
            for ($i = 0; $i < 6; $i++) {
                $code .= $chars[mt_rand(0, strlen($chars) - 1)];
            }

            // 方法2：或者使用更短的邀请码
            // $code = strtoupper(substr(md5(uniqid()), 0, 6));

            // 检查邀请码是否已存在
            $exists = Db::table('ba_user')
                ->where('invitation_code', $code)
                ->count();

            if (!$exists) {
                return $code;
            }

            $attempts++;

            // 如果冲突，尝试不同的算法
            if ($attempts >= 5) {
                $code = 'INV' . mt_rand(1000, 9999);
                $exists = Db::table('ba_user')
                    ->where('invitation_code', $code)
                    ->count();

                if (!$exists) {
                    return $code;
                }
            }
        }

        // 如果还是冲突，使用时间戳+随机数
        return 'INV' . time() . mt_rand(10, 99);
    }

    /**
     * 生成推广链接
     */
    private function generatePromotionLink(int $userId): string
    {
        // 获取用户的邀请码
        $user = Db::table('ba_user')
            ->where('id', $userId)
            ->field('invitation_code')
            ->find();

        $invitationCode = $user['invitation_code'] ?? '';

        if (empty($invitationCode)) {
            // 如果用户还没有邀请码，先生成一个
            $invitationCode = $this->generateInvitationCode();
            Db::table('ba_user')
                ->where('id', $userId)
                ->update(['invitation_code' => $invitationCode]);
        }

        $domain = request()->domain();
        return $domain . '/#/user/register?invite=' . $invitationCode;
    }
}