#!/usr/bin/env python3

import os
import xml.etree.ElementTree as etree
from sys import stdin


def CheckModuleExists():
    module_path = '/usr/share/nginx/modules/ngx_http_apache_rewrite_module.conf'
    if os.path.isfile(module_path):
        return 'mod_rewrite already installed'
    return None

def InstallModule():
    #Todo func
    return None

# Обработка нажатия на кнопку "Сохранить"
def Handle(root):
    result = True
    result_error = CheckModuleExists()
    if result_error is None:
        result_error = InstallModule()
    result = result_error is None

    if not result:
        # Формирование сообщения об ошибке согласно структуре в metadata
        error = etree.SubElement(root, "error")
        error.set('code', '1')
        error.set('type', 'nginx_mod_rewrite_plugin')
        error.set('object', 'wrong_value')
        param = etree.SubElement(error, 'param')
        param.text = 'wrong_value'
        param.set('name', 'object')
        param.set('type', 'msg')
        param = etree.SubElement(error, 'param')
        param.set('name', 'value')
        param.text = result_error


if __name__ == "__main__":
    func = os.getenv("PARAM_func")
    correct_function = False

    if func == "nginx_mod_rewrite_plugin.settings":
        correct_function = True
    elif func == "plugin.settings":
        if os.getenv("PARAM_plugin_settings") == "nginx_mod_rewrite_plugin":
            correct_function = True
    root = etree.parse(stdin).getroot()

    if correct_function:
        if os.getenv("PARAM_clicked_button") == "ok":
            Handle(root)

    etree.dump(root)
    quit(0)