# -*- coding: utf-8 -*-
#!/usr/bin/env python

"""
TODO 利用parse 和 string formatting 以及 读取配置文件json 或者环境变量
"""

import subprocess

import click

import delegator

@click.group
def cli():
    pass

class Command(object):

    def __init__(self, executor):
        self._executor = executor

    def build(self, **options):
        prefix = lambda _ : '-' if len(_) == 1 else '--'
        return [self._executor] + [ prefix(k) + ' '.join((k, v))  for k, v in options]

    def run(self, **options):
        actions = self.build(**options)
        return subprocess.check_output(actions).decode('utf-8')

class ShellCommand(Command):

    def __init__(self, template):
        self.template = template

    def run(self, **options):

        return delegator.run(self.template.format_map(options))

mongodump = ShellCommand('mongodump  -u {user} -p {password} --authenticationDatabase {authdb} --host {host} --port {port} -d {destDB} -o {destDir}')

mongorestore = ShellCommand('mongorestore -u {user} -p {password} --authenticationDatabase {authdb} --host {host} --port {port}  -d {destDB}   --dir {destDir}')

@cli.command()
@click.option('-f','--filepath', prompt=u'请输入要转换的表格文件路径')
@click.option('-s','--sync', prompt=u'同步')
@click.option('-c','--config', prompt=u'配置')
def mongo():
    restore = Command(executor='mongorestore')
    dump = Command(executor='mongodump')

### Memcached
def backup_memcached(host, port, toFileName):
    """
        memcached-tool 127.0.0.1:11211 dump > 11211data
        memcached-tool 127.0.0.1:11212 dump > 11212data
    """
    delegator.run('memcached-tool {host}:{port} dump > {toFileName}'\
                                    .format(host=host, port=port, toFileName=toFileName))

def restore_memcached(host, port, fromFileName):
    """
        nc localhost 11211 < 11211data
        nc localhost 11212 < 11212data
    """
    delegator.run('nc {host} {port} < {fromFileName}'.format(host=host, port=port, fromFileName=fromFileName))