package com.xw.common.utils

import android.app.Activity
import android.content.Context
import android.os.Process
import kotlin.collections.ArrayList
import kotlin.system.exitProcess

/**
 *  Activity出入栈管理类
 */
object ActivityManager {
    /**
     * 用于存储和统一销毁一套操作的Activities
     */
    private var activities: MutableList<Activity> = ArrayList()


    fun currentActivity(): Activity? {
        return if (activities.isNotEmpty())
            activities.last()
        else null
    }

    /**
     * 将创建的activity入栈管理
     *
     * @param activity
     */
    @JvmStatic
    fun addActivity(activity: Activity) {
        activities.add(activity)
    }

    /**
     * 将该activity出栈
     *
     * @param activity
     */
    @JvmStatic
    fun removeActivity(activity: Activity?) {
        if (activity != null) {
            activities.remove(activity)
            activity.finish()
        }
    }

    /**
     * 结束指定类名的Activity
     */
    fun removeActivity(cls: Class<*>) {
        activities?.let {
            for (activity in it) {
                if (activity.javaClass == cls) {
                    removeActivity(activity)
                    break
                }
            }
        }
    }

    /**
     * 结束所有activity
     */
    fun finishAll() {
        finishAllNoExit()
        Process.killProcess(Process.myPid())
    }

    /**
     * 结束所有页面
     */
    fun finishAllNoExit() {
        for (activity in activities) {
            if (!activity.isFinishing) {
                activity.finish()
            }
        }
        activities.clear()
    }

    /**
     * 退出程序并杀死任务栈
     * @param context
     */
    fun exitApp(context: Context?) {
        // 结束进程
        exitProcess(0)
    }
}