package com.moral.andbrickslib.utils;

import android.app.Activity;
import android.content.Context;
import android.text.TextUtils;

import java.util.Iterator;
import java.util.Stack;

/**
 * Activity管理类
 * Created by hjzhang on 2016/3/15.
 */
public class ActivityManager {
    private static Stack<Activity> activityStack;
    private static ActivityManager instance;

    private ActivityManager() {
    }

    public static ActivityManager getActivityManager() {
        if(instance == null) {
            instance = new ActivityManager();
        }
        return instance;
    }

    /**
     * Activity进栈
     */
    public void addActivity(Activity activity) {
        if(activityStack == null) {
            activityStack = new Stack();
        }

        activityStack.add(activity);
    }

    /**
     * 返回当前Activity
     */
    public Activity currentActivity() {
        if(activityStack == null) {
            return null;
        } else {
            Activity activity = (Activity)activityStack.lastElement();
            return activity;
        }
    }

    /**
     * 退出当前Activity
     */
    public void finishActivity() {
        if(activityStack != null) {
            Activity activity = (Activity)activityStack.lastElement();
            this.finishActivity(activity);
        }
    }

    /**
     * 根据activity实例退出
     * @param activity
     */
    public void finishActivity(Activity activity) {
        if(activityStack != null) {
            if(activity != null) {
                activityStack.remove(activity);
                activity.finish();
                activity = null;
            }

        }
    }

    /**
     * 根据Activity名称退出
     * @param cls
     */
    public void finishActivity(Class<?> cls) {
        if(activityStack != null) {
            Iterator iterator = activityStack.iterator();
            while(iterator.hasNext()) {
                Activity activity = (Activity)iterator.next();
                if(activity != null && activity.getClass().equals(cls)) {
                    activity.finish();
                    iterator.remove();
                }
            }

        }
    }

    public void finishAllActivity() {
        if(activityStack != null) {
            Iterator iterator = activityStack.iterator();
            while(iterator.hasNext()) {
                Activity activity = (Activity)iterator.next();
                if(activity != null && !activity.isFinishing()) {
                    activity.finish();
                }
            }
            activityStack.clear();
        }
    }

    public Activity getActivity(String activityName) {
        Iterator iterator = activityStack.iterator();
        Activity activity;
        do {
            if(!iterator.hasNext()) {
                return null;
            }
            activity = (Activity)iterator.next();
        } while(activity == null || !TextUtils.equals(activity.getClass().getName(), activityName));

        return activity;
    }

    /**
     * 退出app
     * @param context
     */
    public void appExit(Context context) {
        try {
            this.finishAllActivity();
        } catch (Exception var3) {
        }

    }
}