<?php

namespace Kylin\Payment\Services;

use Illuminate\Contracts\Container\Container;

/**
 * 支付风控服务类
 */
class PaymentRiskControlService
{
    /**
     * 构造函数
     */
    public function __construct(
        protected readonly Container $app
    ) {}

    /**
     * 评估支付风险
     */
    public function evaluate(array $params): array
    {
        // 这里可以实现具体的风险评估逻辑
        // 例如检查交易金额、交易频率、用户行为等
        $amount = $params['amount'] ?? 0;
        $userId = $params['user_id'] ?? '';
        $ip = $params['ip'] ?? '';

        // 模拟风险评估
        $riskLevel = 'low';
        if ($amount > 10000) {
            $riskLevel = 'high';
        } elseif ($amount > 1000) {
            $riskLevel = 'medium';
        }

        return [
            'code' => 'SUCCESS',
            'message' => '风险评估完成',
            'data' => [
                'risk_level' => $riskLevel,
                'risk_score' => rand(0, 100),
                'suggestion' => $riskLevel === 'high' ? '拒绝交易' : ($riskLevel === 'medium' ? '需要验证' : '允许交易'),
                'details' => [
                    'amount' => $amount,
                    'user_id' => $userId,
                    'ip' => $ip,
                    'timestamp' => time()
                ]
            ]
        ];
    }

    /**
     * 检查交易风险
     */
    public function check(array $params): array
    {
        // 这里可以实现具体的交易风险检查逻辑
        // 例如检查黑名单、异常交易模式等
        $orderId = $params['order_id'] ?? '';
        $paymentType = $params['payment_type'] ?? '';

        // 模拟风险检查
        $isRisky = false;
        $riskReason = '';

        if (rand(0, 9) === 0) {
            $isRisky = true;
            $riskReason = '异常交易模式';
        }

        return [
            'code' => 'SUCCESS',
            'message' => '风险检查完成',
            'data' => [
                'is_risky' => $isRisky,
                'risk_reason' => $riskReason,
                'order_id' => $orderId,
                'payment_type' => $paymentType
            ]
        ];
    }

    /**
     * 拦截风险交易
     */
    public function block(array $params): array
    {
        // 这里可以实现具体的风险交易拦截逻辑
        // 例如拒绝交易、延迟交易等
        $orderId = $params['order_id'] ?? '';
        $reason = $params['reason'] ?? '风险交易';

        return [
            'code' => 'SUCCESS',
            'message' => '风险交易已拦截',
            'data' => [
                'order_id' => $orderId,
                'reason' => $reason,
                'block_time' => date('Y-m-d H:i:s')
            ]
        ];
    }

    /**
     * 放行风险交易
     */
    public function release(array $params): array
    {
        // 这里可以实现具体的风险交易放行逻辑
        // 例如验证后放行、人工审核后放行等
        $orderId = $params['order_id'] ?? '';
        $reason = $params['reason'] ?? '风险已验证';

        return [
            'code' => 'SUCCESS',
            'message' => '风险交易已放行',
            'data' => [
                'order_id' => $orderId,
                'reason' => $reason,
                'release_time' => date('Y-m-d H:i:s')
            ]
        ];
    }

    /**
     * 记录风险事件
     */
    public function log(array $params): array
    {
        // 这里可以实现具体的风险事件记录逻辑
        // 例如保存到数据库、发送告警等
        $eventType = $params['event_type'] ?? 'unknown';
        $details = $params['details'] ?? [];

        return [
            'code' => 'SUCCESS',
            'message' => '风险事件已记录',
            'data' => [
                'event_type' => $eventType,
                'details' => $details,
                'log_time' => date('Y-m-d H:i:s')
            ]
        ];
    }

    /**
     * 获取风险报告
     */
    public function report(array $params = []): array
    {
        // 这里可以实现具体的风险报告生成逻辑
        // 例如统计风险事件、分析风险趋势等
        $startDate = $params['start_date'] ?? date('Y-m-d', strtotime('-30 days'));
        $endDate = $params['end_date'] ?? date('Y-m-d');

        // 模拟数据
        $events = [];
        for ($i = 1; $i <= 10; $i++) {
            $events[] = [
                'id' => $i,
                'event_type' => ['high_amount', 'suspicious_ip', 'frequent_transaction'][rand(0, 2)],
                'risk_level' => ['low', 'medium', 'high'][rand(0, 2)],
                'order_id' => 'ORDER' . rand(1000, 9999),
                'amount' => rand(100, 10000),
                'created_at' => date('Y-m-d H:i:s', strtotime('-'.rand(1, 30).' days'))
            ];
        }

        return [
            'code' => 'SUCCESS',
            'message' => '风险报告生成成功',
            'data' => [
                'events' => $events,
                'total_events' => 100,
                'high_risk_events' => 20,
                'medium_risk_events' => 30,
                'low_risk_events' => 50,
                'start_date' => $startDate,
                'end_date' => $endDate
            ]
        ];
    }

    /**
     * 管理风险规则
     */
    public function manageRules(array $params): array
    {
        // 这里可以实现具体的风险规则管理逻辑
        // 例如添加、更新、删除风险规则等
        $action = $params['action'] ?? 'list';
        $rule = $params['rule'] ?? [];

        return [
            'code' => 'SUCCESS',
            'message' => '风险规则管理成功',
            'data' => [
                'action' => $action,
                'rule' => $rule,
                'timestamp' => time()
            ]
        ];
    }

    /**
     * 实时监控
     */
    public function monitor(array $params = []): array
    {
        // 这里可以实现具体的实时监控逻辑
        // 例如监控交易流量、风险事件等
        $duration = $params['duration'] ?? 60; // 监控持续时间（秒）

        // 模拟实时监控数据
        $transactions = [];
        $riskEvents = [];

        for ($i = 1; $i <= 5; $i++) {
            $transactions[] = [
                'order_id' => 'ORDER' . rand(1000, 9999),
                'amount' => rand(100, 10000),
                'payment_type' => ['alipay', 'wechat', 'unionpay'][rand(0, 2)],
                'status' => ['SUCCESS', 'PENDING', 'FAILED'][rand(0, 2)],
                'timestamp' => time() - rand(0, $duration)
            ];
        }

        for ($i = 1; $i <= 2; $i++) {
            $riskEvents[] = [
                'id' => $i,
                'event_type' => ['high_amount', 'suspicious_ip', 'frequent_transaction'][rand(0, 2)],
                'risk_level' => ['medium', 'high'][rand(0, 1)],
                'order_id' => 'ORDER' . rand(1000, 9999),
                'amount' => rand(1000, 10000),
                'timestamp' => time() - rand(0, $duration)
            ];
        }

        return [
            'code' => 'SUCCESS',
            'message' => '实时监控完成',
            'data' => [
                'transactions' => $transactions,
                'risk_events' => $riskEvents,
                'duration' => $duration,
                'timestamp' => time()
            ]
        ];
    }
}
