# Copyright (c) 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Base class for objects to configure Linksys dual band access points
   using webdriver."""

import logging
import urlparse

import dynamic_ap_configurator
import ap_spec

class LinksyseDualBandAPConfigurator(
        dynamic_ap_configurator.DynamicAPConfigurator):
    """Base class for objects to configure Linksys dual band access points
       using webdriver."""


    def _alert_handler(self, alert):
        """Checks for any modal dialogs which popup to alert the user and
        either raises a RuntimeError or ignores the alert.

        Args:
          alert: The modal dialog's contents.
        """
        text = alert.text
        #  We ignore warnings that we get when we disable visibility or security
        #  changed to WEP, WPA Personal or WPA Enterprise.
        if 'Security Mode is disabled.' in text:
            alert.accept()
        elif 'Setting the Security Mode to WEP, WPA Personal' in text:
            alert.accept()
        elif 'Turning off SSID Broadcast' in text:
            alert.accept()
        elif 'Security modes are not compatible' in text:
            alert.accept()
            raise RuntimeError('Security modes are not compatible. %s' % text)
        elif 'security mode is not compatible with Wireless-N' in text:
            alert.accept()
        elif 'The wifi interface is current busy.' in text:
            alert.accept()
            self.click_button_by_xpath('//a[text()="Save Settings"]',
                                       alert_handler=self._alert_handler)
        else:
            alert.accept()
            raise RuntimeError('We have an unhandled alert: %s' % text)


    def get_number_of_pages(self):
        return 1


    def get_supported_bands(self):
        return [{'band': ap_spec.BAND_2GHZ,
                 'channels': ['Auto', 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]},
                {'band': ap_spec.BAND_5GHZ,
                 'channels': ['Auto', 36, 40, 44, 48, 149, 153, 157, 161]}]


    def get_supported_modes(self):
        return [{'band': ap_spec.BAND_2GHZ,
                 'modes': [ap_spec.MODE_B, ap_spec.MODE_N, ap_spec.MODE_B |
                           ap_spec.MODE_G, ap_spec.MODE_G]},
                {'band': ap_spec.BAND_5GHZ,
                 'modes': [ap_spec.MODE_A, ap_spec.MODE_N]}]


    def is_security_mode_supported(self, security_mode):
        if self.current_band == ap_spec.BAND_5GHZ:
            return security_mode in (ap_spec.SECURITY_TYPE_DISABLED,
                                     ap_spec.SECURITY_TYPE_WPAPSK,
                                     ap_spec.SECURITY_TYPE_WPA2PSK)
        return security_mode in (ap_spec.SECURITY_TYPE_DISABLED,
                                 ap_spec.SECURITY_TYPE_WPAPSK,
                                 ap_spec.SECURITY_TYPE_WPA2PSK,
                                 ap_spec.SECURITY_TYPE_WEP)


    def navigate_to_page(self, page_number):
        if page_number == 1:
            url = urlparse.urljoin(self.admin_interface_url,
                                   'Wireless_Basic.asp')
            self.get_url(url, page_title='Settings')
        else:
            raise RuntimeError('Invalid page number passed.  Number of pages '
                               '%d, page value sent was %d' %
                               (self.get_number_of_pages(), page_number))


    def save_page(self, page_number):
        self.click_button_by_xpath('//a[text()="Save Settings"]',
                                   alert_handler=self._alert_handler)
        continue_xpath = '//input[@value="Continue" and @type="button"]'
        self.wait_for_object_by_xpath(continue_xpath)
        self.click_button_by_xpath(continue_xpath)


    def set_mode(self, mode, band=None):
        self.add_item_to_command_list(self._set_mode, (mode, band), 1, 800)


    def _set_mode(self, mode, band=None):
        mode_mapping = {ap_spec.MODE_B: 'Wireless-B Only',
                        ap_spec.MODE_G: 'Wireless-G Only',
                        ap_spec.MODE_B | ap_spec.MODE_G: 'Wireless-B/G Only',
                        ap_spec.MODE_N: 'Wireless-N Only',
                        ap_spec.MODE_A: 'Wireless-A Only'}
        xpath = '//select[@name="wl0_net_mode"]'
        if self.current_band == ap_spec.BAND_5GHZ or band == ap_spec.BAND_5GHZ:
            self.current_band = ap_spec.BAND_5GHZ
            xpath = '//select[@name="wl1_net_mode"]'
        mode_name = ''
        if mode in mode_mapping.keys():
            mode_name = mode_mapping[mode]
            if ((mode & ap_spec.MODE_A) and
                (self.current_band != ap_spec.BAND_5GHZ)):
                #  a mode only in 5Ghz
                logging.debug('Mode \'a\' is not available for 2.4Ghz band.')
                return
            elif ((mode & (ap_spec.MODE_B | ap_spec.MODE_G) ==
                  (ap_spec.MODE_B | ap_spec.MODE_G)) or
                 (mode & ap_spec.MODE_B == ap_spec.MODE_B) or
                 (mode & ap_spec.MODE_G == ap_spec.MODE_G)) and \
                 (self.current_band != ap_spec.BAND_2GHZ):
                #  b/g, b, g mode only in 2.4Ghz
                logging.debug('Mode \'%s\' is not available for 5Ghz band.',
                              mode_name)
                return
        else:
            raise RuntimeError('The mode selected %d is not supported by router'
                               ' %s.', hex(mode), self.name)
        self.select_item_from_popup_by_xpath(mode_name, xpath,
                                             alert_handler=self._alert_handler)


    def set_radio(self, enabled=True):
        logging.debug('set_radio is not supported in Linksys dual band AP.')
        return None


    def set_ssid(self, ssid):
        self.add_item_to_command_list(self._set_ssid, (ssid,), 1, 900)


    def _set_ssid(self, ssid):
        xpath = '//input[@maxlength="32" and @name="wl0_ssid"]'
        if self.current_band == ap_spec.BAND_5GHZ:
            xpath = '//input[@maxlength="32" and @name="wl1_ssid"]'
        self.set_content_of_text_field_by_xpath(ssid, xpath)
        self._ssid = ssid


    def set_channel(self, channel):
        self.add_item_to_command_list(self._set_channel, (channel,), 1, 900)


    def _set_channel(self, channel):
        position = self._get_channel_popup_position(channel)
        channel_choices = ['Auto',
                           '1 - 2.412 GHz', '2 - 2.417 GHz', '3 - 2.422 GHz',
                           '4 - 2.427 GHz', '5 - 2.432 GHz', '6 - 2.437 GHz',
                           '7 - 2.442 GHz', '8 - 2.447 GHz', '9 - 2.452 GHz',
                           '10 - 2.457 GHz', '11 - 2.462 GHz']
        xpath = '//select[@name="_wl0_channel"]'
        if self.current_band == ap_spec.BAND_5GHZ:
            xpath = '//select[@name="_wl1_channel"]'
            channel_choices = ['Auto', '36 - 5.180 GHz', '40 - 5.200 GHz',
                               '44 - 5.220 GHz', '48 - 5.240 GHz',
                               '149 - 5.745 GHz', '153 - 5.765 GHz',
                               '157 - 5.785 GHz', '161 - 5.805 GHz']
        self.select_item_from_popup_by_xpath(channel_choices[position],
                                             xpath)


    def set_band(self, band):
        if band == ap_spec.BAND_5GHZ:
            self.current_band = ap_spec.BAND_5GHZ
        elif band == ap_spec.BAND_2GHZ:
            self.current_band = ap_spec.BAND_2GHZ
        else:
            raise RuntimeError('Invalid band sent %s' % band)


    def set_security_disabled(self):
        self.add_item_to_command_list(self._set_security_disabled, (), 1, 900)


    def _set_security_disabled(self):
        xpath = '//select[@name="wl0_security_mode"]'
        if self.current_band == ap_spec.BAND_5GHZ:
            xpath = '//select[@name="wl1_security_mode"]'
        self.select_item_from_popup_by_xpath('Disabled', xpath)


    def set_security_wep(self, key_value, authentication):
        self.add_item_to_command_list(self._set_security_wep,
                                      (key_value, authentication), 1, 900)


    def _set_security_wep(self, key_value, authentication):
        popup = '//select[@name="wl0_security_mode"]'
        text_field = '//input[@name="wl0_passphrase"]'
        xpath = '//input[@name="wepGenerate0" and @type="button"]'
        if self.current_band == ap_spec.BAND_5GHZ:
            popup = '//select[@name="wl1_security_mode"]'
            text_field = '//input[@name="wl1_passphrase"]'
            xpath = '//input[@name="wepGenerate1" and @type="button"]'
        self.wait_for_object_by_xpath(popup)
        self.select_item_from_popup_by_xpath('WEP', popup,
                                             wait_for_xpath=text_field,
                                             alert_handler=self._alert_handler)
        self.set_content_of_text_field_by_xpath(key_value, text_field,
                                                abort_check=True)
        self.click_button_by_xpath(xpath)


    def set_security_wpapsk(self, security, shared_key, update_interval=None):
        self.add_item_to_command_list(self._set_security_wpapsk,
                                      (security, shared_key, update_interval),
                                       1, 900)


    def _set_security_wpapsk(self, security, shared_key, update_interval=None):
        popup = '//select[@name="wl0_security_mode"]'
        key_field = '//input[@name="wl0_wpa_psk"]'
        if self.current_band == ap_spec.BAND_5GHZ:
            popup = '//select[@name="wl1_security_mode"]'
            key_field = '//input[@name="wl1_wpa_psk"]'
        self.wait_for_object_by_xpath(popup)
        if security == ap_spec.SECURITY_TYPE_WPAPSK:
            wpa_item = 'WPA Personal'
        else:
            wpa_item = 'WPA2 Personal'
        self.select_item_from_popup_by_xpath(wpa_item, popup,
                                             wait_for_xpath=key_field,
                                             alert_handler=self._alert_handler)
        self.set_content_of_text_field_by_xpath(shared_key, key_field,
                                                abort_check=True)


    def is_update_interval_supported(self):
        """
        Returns True if setting the PSK refresh interval is supported.

        @return True is supported; False otherwise
        """
        return False


    def set_visibility(self, visible=True):
        self.add_item_to_command_list(self._set_visibility, (visible,), 1, 900)


    def _set_visibility(self, visible=True):
        button = 'wl0_closed'
        if self.current_band == ap_spec.BAND_5GHZ:
            button = 'wl1_closed'
        int_value = 0 if visible else 1
        xpath = ('//input[@value="%d" and @name="%s"]' % (int_value, button))
        self.click_button_by_xpath(xpath)