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

from my_error import MyError
import sys
import os
import getopt

help_str = \
"""
Help:
""" +\
sys.argv[0] + """ [OPTIONS]""" +\
'\n\n' +\
'-I, --help          Display this help and exit.\n' +\
'-V, --version       Output version information and exit.\n' +\
'-h, --host=name     Connect to host.\n' +\
'-P, --port=name     Port number to use for connection.\n' +\
'-u, --user=name     User for login.\n' +\
'-p, --password=name Password to use when connecting to server. If password is\n' +\
'                    not given it\'s empty string "".\n' +\
'-m, --module=name   Modules to run. Modules should be a string combined by some of\n' +\
'                    the following strings: ddl, normal_dml, each_tenant_dml,\n' +\
'                    system_variable_dml, special_action, all. "all" represents\n' +\
'                    that all modules should be run. They are splitted by ",".\n' +\
'                    For example: -m all, or --module=ddl,normal_dml,special_action\n' +\
'-l, --log-file=name Log file path. If log file path is not given it\'s ' + os.path.splitext(sys.argv[0])[0] + '.log\n' +\
'\n\n' +\
'Maybe you want to run cmd like that:\n' +\
sys.argv[0] + ' -h 127.0.0.1 -P 3306 -u xxx -p xxx\n'

version_str = """version 1.0.0"""

class Option:
  __g_short_name_set = set([])
  __g_long_name_set = set([])
  __short_name = None
  __long_name = None
  __is_with_param = None
  __is_local_opt = None
  __has_value = None
  __value = None
  def __init__(self, short_name, long_name, is_with_param, is_local_opt, default_value = None):
    if short_name in Option.__g_short_name_set:
      raise MyError('duplicate option short name: {0}'.format(short_name))
    elif long_name in Option.__g_long_name_set:
      raise MyError('duplicate option long name: {0}'.format(long_name))
    Option.__g_short_name_set.add(short_name)
    Option.__g_long_name_set.add(long_name)
    self.__short_name = short_name
    self.__long_name = long_name
    self.__is_with_param = is_with_param
    self.__is_local_opt = is_local_opt
    self.__has_value = False
    if None != default_value:
      self.set_value(default_value)
  def is_with_param(self):
    return self.__is_with_param
  def get_short_name(self):
    return self.__short_name
  def get_long_name(self):
    return self.__long_name
  def has_value(self):
    return self.__has_value
  def get_value(self):
    return self.__value
  def set_value(self, value):
    self.__value = value
    self.__has_value = True
  def is_local_opt(self):
    return self.__is_local_opt
  def is_valid(self):
    return None != self.__short_name and None != self.__long_name and True == self.__has_value and None != self.__value

g_opts =\
[\
Option('I', 'help', False, True),\
Option('V', 'version', False, True),\
Option('h', 'host', True, False),\
Option('P', 'port', True, False),\
Option('u', 'user', True, False),\
Option('p', 'password', True, False, ''),\
# 要跑哪个模块，默认全跑
Option('m', 'module', True, False, 'all'),\
# 日志文件路径，不同脚本的main函数中中会改成不同的默认值
Option('l', 'log-file', True, False)
]\

def change_opt_defult_value(opt_long_name, opt_default_val):
  global g_opts
  for opt in g_opts:
    if opt.get_long_name() == opt_long_name:
      opt.set_value(opt_default_val)
      return

def has_no_local_opts():
  global g_opts
  no_local_opts = True
  for opt in g_opts:
    if opt.is_local_opt() and opt.has_value():
      no_local_opts = False
  return no_local_opts

def check_db_client_opts():
  global g_opts
  for opt in g_opts:
    if not opt.is_local_opt() and not opt.has_value():
      raise MyError('option "-{0}" has not been specified, maybe you should run "{1} --help" for help'\
          .format(opt.get_short_name(), sys.argv[0]))

def parse_option(opt_name, opt_val):
  global g_opts
  for opt in g_opts:
    if opt_name in (('-' + opt.get_short_name()), ('--' + opt.get_long_name())):
      opt.set_value(opt_val)

def parse_options(argv):
  global g_opts
  short_opt_str = ''
  long_opt_list = []
  for opt in g_opts:
    if opt.is_with_param():
      short_opt_str += opt.get_short_name() + ':'
    else:
      short_opt_str += opt.get_short_name()
  for opt in g_opts:
    if opt.is_with_param():
      long_opt_list.append(opt.get_long_name() + '=')
    else:
      long_opt_list.append(opt.get_long_name())
  (opts, args) = getopt.getopt(argv, short_opt_str, long_opt_list)
  for (opt_name, opt_val) in opts:
    parse_option(opt_name, opt_val)
  if has_no_local_opts():
    check_db_client_opts()

def deal_with_local_opt(opt):
  if 'help' == opt.get_long_name():
    global help_str
    print help_str
  elif 'version' == opt.get_long_name():
    global version_str
    print version_str

def deal_with_local_opts():
  global g_opts
  if has_no_local_opts():
    raise MyError('no local options, can not deal with local options')
  else:
    for opt in g_opts:
      if opt.is_local_opt() and opt.has_value():
        deal_with_local_opt(opt)
        # 只处理一个
        return

def get_opt_host():
  global g_opts
  for opt in g_opts:
    if 'host' == opt.get_long_name():
      return opt.get_value()

def get_opt_port():
  global g_opts
  for opt in g_opts:
    if 'port' == opt.get_long_name():
      return opt.get_value()

def get_opt_user():
  global g_opts
  for opt in g_opts:
    if 'user' == opt.get_long_name():
      return opt.get_value()

def get_opt_password():
  global g_opts
  for opt in g_opts:
    if 'password' == opt.get_long_name():
      return opt.get_value()

def get_opt_module():
  global g_opts
  for opt in g_opts:
    if 'module' == opt.get_long_name():
      return opt.get_value()

def get_opt_log_file():
  global g_opts
  for opt in g_opts:
    if 'log-file' == opt.get_long_name():
      return opt.get_value()

#parse_options(sys.argv[1:])

