#!/usr/bin/env python
# -*- coding:utf-8 -*-
# project: 3月
# author: liuyu
# date: 2020/3/6
import time,re,os,signal
from subprocess import Popen, PIPE
import logging
import paramiko,json
import socket
import pexpect
from api.utils.storage.caches import developer_auth_code

def default_result():
    return {'exit_code': '99', 'return_info': 'Failed to run, function_name is not existed'}


def portisonline(host,port):
    result={}
    sk = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sk.settimeout(3)
    result["host"] = host
    result["port"]=port
    result["functionname"]="CHECK_HOST_ONLINE："
    try:
      sk.connect((host,port))
      result["message"]="Connection success"
      result["code"]=0
    except Exception:
      result["message"]="SSH Port Connection refused"
      result["code"]=1
    sk.close()
    return result




class SSHConnection(object):
    def __init__(self, host, port, username, password):
        self._host = host
        self._port = port
        self._username = username
        self._password = password
        self._transport = None
        self._sftp = None
        self._client = None
        self._connect()

    def _connect(self):
        transport = paramiko.Transport((self._host, self._port))
        transport.connect(username=self._username, password=self._password)
        self._transport = transport

    #下载
    def download(self, remotepath, localpath):
        if self._sftp is None:
            self._sftp = paramiko.SFTPClient.from_transport(self._transport)
        self._sftp.get(remotepath, localpath)
        self.close()

    #上传
    def put(self, localpath, remotepath):
        if self._sftp is None:
            self._sftp = paramiko.SFTPClient.from_transport(self._transport)
        self.exec_command('mkdir -p %s'%(os.path.dirname(remotepath)))
        self._sftp.put(localpath, remotepath)
        self.close()


    #执行命令
    def exec_command(self, command):
        if self._client is None:
            self._client = paramiko.SSHClient()
            self._client._transport = self._transport
        stdin, stdout, stderr = self._client.exec_command(command)
        data = stdout.read()
        if len(data) > 0:
            return {'status':0,'infos':data}
        err = stderr.read()
        if len(err) > 0:
            return {'status':1,'infos':err}
        return {'status': 0, 'infos': data}

    def close(self):
        if self._transport:
            self._transport.close()
        if self._client:
            self._client.close()

def pshell_command(cmdstrs,user_obj,developer_email,timeout=60*10):
    result = default_result()
    run = pexpect.spawn(cmdstrs, encoding='utf-8')
    try:
        index = run.expect(["Two-factor Authentication","Invalid username and password combination", pexpect.EOF, pexpect.TIMEOUT],timeout=timeout)
        if index == 0:
            count = 1
            if timeout == -1:
                timeout = 60*60*24
            while True and count<timeout/3:
                code = developer_auth_code("get",user_obj,developer_email)
                if code:
                    run.sendline(code)
                    try:
                        err = run.expect(["Unauthorized Access", pexpect.EOF, pexpect.TIMEOUT])
                        if err == 0:
                            result['exit_code'] = 2
                            result['return_info'] = 'Unauthorized Access'
                        elif err == 1:
                            result['exit_code'] = 0
                            result['return_info'] = 'Verify Code Success'
                        else:
                            result['exit_code'] = 3
                            result['return_info'] = 'Verify Code TimeOut or UnKnown Error'
                        developer_auth_code("del", user_obj, developer_email)
                        return result
                    except Exception as e:
                        print(e)
                    developer_auth_code("del", user_obj, developer_email)
                    result['exit_code'] = 0
                    result['return_info'] = 'Success'
                    return result
                count+=1
                time.sleep(3)
        elif index == 1:
            result['exit_code'] = 1
            result['return_info'] = 'Invalid username and password combination'
        elif index == 2:
            result['exit_code'] = 0
            result['return_info'] = 'Alreay Success'
        else:
            result['exit_code'] = 4
            result['return_info'] = 'Code TimeOut or UnKnown Error'
    except Exception as e:
        print(e)
    return result


def shell_command(cmdstrs,timeout):
    result = default_result()
    result['return_info'] = ''
    shell_start_time = time.time()
    child = Popen(cmdstrs, shell=True, stdout=PIPE, stderr=PIPE)
    if timeout:
        while child.poll() is None:
            time.sleep(1)
            now = time.time()
            if int(now - shell_start_time) > timeout:
                os.kill(child.pid, signal.SIGKILL)
                os.waitpid(-1, os.WNOHANG)
                result['exit_code']=126
                return result

    out, err = child.communicate()
    if err:
        result['err_info'] = err
    shell_end_time = time.time()
    result['shell_run_time'] = shell_end_time - shell_start_time
    out = out.strip(b'\n')
    result['return_info'] = out
    result['exit_code'] = child.returncode
    logging.info(u'shell: %s - %s%s - %s%d' % (cmdstrs, 'return_info: ', out, 'exit_code: ', child.returncode))
    return result

def use_user_pass(hostip,port,user,passwd,cmdstrs):
    result = default_result()
    checkinfo = portisonline(hostip, port)
    if checkinfo["code"] != 0:
        result['shell_run_time'] = 0
        result['return_info'] = json.dumps(checkinfo)
        result['exit_code'] = checkinfo["code"]
    else:
        conn = SSHConnection(hostip, port, user, passwd)
        result['return_info'] = ''
        shell_start_time = time.time()
        out=conn.exec_command(cmdstrs)
        shell_end_time = time.time()
        result['shell_run_time'] = shell_end_time - shell_start_time
        outs =str(out['infos'],'utf-8')
        outs = outs.strip('\n')
        result['return_info'] = outs
        result['exit_code'] = out['status']
        # logging.info(u'shell: %s - %s%s - %s%d' % (cmdstrs, 'return_info: ', out, 'exit_code: ', out['status']))
        print('host: %s user:%s - shell: %s - %s%s - %s%d' % (hostip,user,cmdstrs, 'return_info: ', out, 'exit_code: ', out['status']))
        conn.close()
    return result