//

// STAntiDebugMonitor.swift

// STBaseProject

//

// Created by 寒江孤影 on 2018/12/10.

//

import Foundation

// MARK: - 反调试监控器

public final class STAntiDebugMonitor {

public var onSecurityIssue: ((STSecurityIssue) -> Void)?

private var timer: STTimer?

private var isMonitoring = false // 仅在主线程访问，与 Timer 同线程

private let config: STAntiDebugConfig

private let securityCheck: () -> STSecurityCheckResult

public init(config: STAntiDebugConfig, securityCheck: @escaping () -> STSecurityCheckResult = { STSecurityConfig.shared.st_performSecurityCheck() } ) {

self.config = config

self.securityCheck = securityCheck

}

/// 开始定时安全检测。若已在监控或 config.enabled == false 则空操作。

public func st_startMonitoring() {

guard self.config.enabled else { return }

DispatchQueue.main.async { [weak self] in

guard let self, !self.isMonitoring else { return }

self.isMonitoring = true

let timer = STTimer(interval: self.config.checkInterval)

timer.start { [weak self] _ in

self?.st_runCheck()

}

self.timer = timer

}

}

/// 停止定时检测。可安全多次调用。

public func st_stopMonitoring() {

DispatchQueue.main.async { [weak self] in

self?.st_cancelTimer()

}

}

private func st_runCheck() {

let result = self.securityCheck()

guard !result.isSecure else { return }

result.issues.forEach { self.onSecurityIssue?($0) }

}

private func st_cancelTimer() {

self.timer?.stop()

self.timer = nil

self.isMonitoring = false

}

deinit {

if Thread.isMainThread {

self.st_cancelTimer()

} else {

let t = self.timer

DispatchQueue.main.async { t?.stop() }

}

}

}