# -*- coding: utf-8 -*-
# vim: autoindent shiftwidth=4 expandtab textwidth=120 tabstop=4 softtabstop=4

###############################################################################
# OpenLP - Open Source Lyrics Projection                                      #
# --------------------------------------------------------------------------- #
# Copyright (c) 2008-2018 OpenLP Developers                                   #
# --------------------------------------------------------------------------- #
# This program is free software; you can redistribute it and/or modify it     #
# under the terms of the GNU General Public License as published by the Free  #
# Software Foundation; version 2 of the License.                              #
#                                                                             #
# This program is distributed in the hope that it will be useful, but WITHOUT #
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or       #
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for    #
# more details.                                                               #
#                                                                             #
# You should have received a copy of the GNU General Public License along     #
# with this program; if not, write to the Free Software Foundation, Inc., 59  #
# Temple Place, Suite 330, Boston, MA 02111-1307 USA                          #
###############################################################################
"""
The :mod:`~openlp.core.api.tab` module contains the settings tab for the API
"""
from PyQt5 import QtCore, QtGui, QtNetwork, QtWidgets

from openlp.core.common.i18n import UiStrings, translate
from openlp.core.common.registry import Registry
from openlp.core.common.settings import Settings
from openlp.core.lib import SettingsTab

ZERO_URL = '0.0.0.0'


class ApiTab(SettingsTab):
    """
    RemoteTab is the Remotes settings tab in the settings dialog.
    """
    def __init__(self, parent):
        self.icon_path = ':/plugins/plugin_remote.png'
        advanced_translated = translate('OpenLP.AdvancedTab', 'Advanced')
        super(ApiTab, self).__init__(parent, 'api', advanced_translated)
        self.define_main_window_icon()
        self.generate_icon()

    def setupUi(self):
        self.setObjectName('ApiTab')
        super(ApiTab, self).setupUi()
        self.server_settings_group_box = QtWidgets.QGroupBox(self.left_column)
        self.server_settings_group_box.setObjectName('server_settings_group_box')
        self.server_settings_layout = QtWidgets.QFormLayout(self.server_settings_group_box)
        self.server_settings_layout.setObjectName('server_settings_layout')
        self.address_label = QtWidgets.QLabel(self.server_settings_group_box)
        self.address_label.setObjectName('address_label')
        self.address_edit = QtWidgets.QLineEdit(self.server_settings_group_box)
        self.address_edit.setSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
        self.address_edit.setValidator(QtGui.QRegExpValidator(QtCore.QRegExp('\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}'),
                                       self))
        self.address_edit.setObjectName('address_edit')
        self.server_settings_layout.addRow(self.address_label, self.address_edit)
        self.twelve_hour_check_box = QtWidgets.QCheckBox(self.server_settings_group_box)
        self.twelve_hour_check_box.setObjectName('twelve_hour_check_box')
        self.server_settings_layout.addRow(self.twelve_hour_check_box)
        self.thumbnails_check_box = QtWidgets.QCheckBox(self.server_settings_group_box)
        self.thumbnails_check_box.setObjectName('thumbnails_check_box')
        self.server_settings_layout.addRow(self.thumbnails_check_box)
        self.left_layout.addWidget(self.server_settings_group_box)
        self.http_settings_group_box = QtWidgets.QGroupBox(self.left_column)
        self.http_settings_group_box.setObjectName('http_settings_group_box')
        self.http_setting_layout = QtWidgets.QFormLayout(self.http_settings_group_box)
        self.http_setting_layout.setObjectName('http_setting_layout')
        self.port_label = QtWidgets.QLabel(self.http_settings_group_box)
        self.port_label.setObjectName('port_label')
        self.port_spin_box = QtWidgets.QLabel(self.http_settings_group_box)
        self.port_spin_box.setObjectName('port_spin_box')
        self.http_setting_layout.addRow(self.port_label, self.port_spin_box)
        self.remote_url_label = QtWidgets.QLabel(self.http_settings_group_box)
        self.remote_url_label.setObjectName('remote_url_label')
        self.remote_url = QtWidgets.QLabel(self.http_settings_group_box)
        self.remote_url.setObjectName('remote_url')
        self.remote_url.setOpenExternalLinks(True)
        self.http_setting_layout.addRow(self.remote_url_label, self.remote_url)
        self.stage_url_label = QtWidgets.QLabel(self.http_settings_group_box)
        self.stage_url_label.setObjectName('stage_url_label')
        self.stage_url = QtWidgets.QLabel(self.http_settings_group_box)
        self.stage_url.setObjectName('stage_url')
        self.stage_url.setOpenExternalLinks(True)
        self.http_setting_layout.addRow(self.stage_url_label, self.stage_url)
        self.chords_url_label = QtWidgets.QLabel(self.http_settings_group_box)
        self.chords_url_label.setObjectName('chords_url_label')
        self.chords_url = QtWidgets.QLabel(self.http_settings_group_box)
        self.chords_url.setObjectName('chords_url')
        self.chords_url.setOpenExternalLinks(True)
        self.http_setting_layout.addRow(self.chords_url_label, self.chords_url)
        self.live_url_label = QtWidgets.QLabel(self.http_settings_group_box)
        self.live_url_label.setObjectName('live_url_label')
        self.live_url = QtWidgets.QLabel(self.http_settings_group_box)
        self.live_url.setObjectName('live_url')
        self.live_url.setOpenExternalLinks(True)
        self.http_setting_layout.addRow(self.live_url_label, self.live_url)
        self.left_layout.addWidget(self.http_settings_group_box)
        self.user_login_group_box = QtWidgets.QGroupBox(self.left_column)
        self.user_login_group_box.setCheckable(True)
        self.user_login_group_box.setChecked(False)
        self.user_login_group_box.setObjectName('user_login_group_box')
        self.user_login_layout = QtWidgets.QFormLayout(self.user_login_group_box)
        self.user_login_layout.setObjectName('user_login_layout')
        self.user_id_label = QtWidgets.QLabel(self.user_login_group_box)
        self.user_id_label.setObjectName('user_id_label')
        self.user_id = QtWidgets.QLineEdit(self.user_login_group_box)
        self.user_id.setObjectName('user_id')
        self.user_login_layout.addRow(self.user_id_label, self.user_id)
        self.password_label = QtWidgets.QLabel(self.user_login_group_box)
        self.password_label.setObjectName('password_label')
        self.password = QtWidgets.QLineEdit(self.user_login_group_box)
        self.password.setObjectName('password')
        self.user_login_layout.addRow(self.password_label, self.password)
        self.left_layout.addWidget(self.user_login_group_box)
        self.update_site_group_box = QtWidgets.QGroupBox(self.left_column)
        self.update_site_group_box.setCheckable(True)
        self.update_site_group_box.setChecked(False)
        self.update_site_group_box.setObjectName('update_site_group_box')
        self.update_site_layout = QtWidgets.QFormLayout(self.update_site_group_box)
        self.update_site_layout.setObjectName('update_site_layout')
        self.current_version_label = QtWidgets.QLabel(self.update_site_group_box)
        self.current_version_label.setObjectName('current_version_label')
        self.current_version_value = QtWidgets.QLabel(self.update_site_group_box)
        self.current_version_value.setObjectName('current_version_value')
        self.update_site_layout.addRow(self.current_version_label, self.current_version_value)
        self.master_version_label = QtWidgets.QLabel(self.update_site_group_box)
        self.master_version_label.setObjectName('master_version_label')
        self.master_version_value = QtWidgets.QLabel(self.update_site_group_box)
        self.master_version_value.setObjectName('master_version_value')
        self.update_site_layout.addRow(self.master_version_label, self.master_version_value)
        self.left_layout.addWidget(self.update_site_group_box)
        self.app_group_box = QtWidgets.QGroupBox(self.right_column)
        self.app_group_box.setObjectName('app_group_box')
        self.right_layout.addWidget(self.app_group_box)
        self.app_qr_layout = QtWidgets.QVBoxLayout(self.app_group_box)
        self.app_qr_layout.setObjectName('app_qr_layout')
        self.app_qr_code_label = QtWidgets.QLabel(self.app_group_box)
        self.app_qr_code_label.setPixmap(QtGui.QPixmap(':/remotes/app_qr.svg'))
        self.app_qr_code_label.setAlignment(QtCore.Qt.AlignCenter)
        self.app_qr_code_label.setObjectName('app_qr_code_label')
        self.app_qr_layout.addWidget(self.app_qr_code_label)
        self.app_qr_description_label = QtWidgets.QLabel(self.app_group_box)
        self.app_qr_description_label.setObjectName('app_qr_description_label')
        self.app_qr_description_label.setOpenExternalLinks(True)
        self.app_qr_description_label.setWordWrap(True)
        self.app_qr_layout.addWidget(self.app_qr_description_label)
        self.left_layout.addStretch()
        self.right_layout.addStretch()
        self.twelve_hour_check_box.stateChanged.connect(self.on_twelve_hour_check_box_changed)
        self.thumbnails_check_box.stateChanged.connect(self.on_thumbnails_check_box_changed)
        self.address_edit.textChanged.connect(self.set_urls)

    def define_main_window_icon(self):
        """
        Define an icon on the main window to show the state of the server
        :return:
        """
        self.remote_server_icon = QtWidgets.QLabel(self.main_window.status_bar)
        size_policy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        size_policy.setHorizontalStretch(0)
        size_policy.setVerticalStretch(0)
        size_policy.setHeightForWidth(self.remote_server_icon.sizePolicy().hasHeightForWidth())
        self.remote_server_icon.setSizePolicy(size_policy)
        self.remote_server_icon.setFrameShadow(QtWidgets.QFrame.Plain)
        self.remote_server_icon.setLineWidth(1)
        self.remote_server_icon.setScaledContents(True)
        self.remote_server_icon.setFixedSize(20, 20)
        self.remote_server_icon.setObjectName('remote_server_icon')
        self.main_window.status_bar.insertPermanentWidget(2, self.remote_server_icon)

    def retranslateUi(self):
        self.tab_title_visible = translate('RemotePlugin.RemoteTab', 'Remote Interface')
        self.server_settings_group_box.setTitle(translate('RemotePlugin.RemoteTab', 'Server Settings'))
        self.address_label.setText(translate('RemotePlugin.RemoteTab', 'Serve on IP address:'))
        self.port_label.setText(translate('RemotePlugin.RemoteTab', 'Port number:'))
        self.remote_url_label.setText(translate('RemotePlugin.RemoteTab', 'Remote URL:'))
        self.stage_url_label.setText(translate('RemotePlugin.RemoteTab', 'Stage view URL:'))
        self.live_url_label.setText(translate('RemotePlugin.RemoteTab', 'Live view URL:'))
        self.chords_url_label.setText(translate('RemotePlugin.RemoteTab', 'Chords view URL:'))
        self.twelve_hour_check_box.setText(translate('RemotePlugin.RemoteTab', 'Display stage time in 12h format'))
        self.thumbnails_check_box.setText(translate('RemotePlugin.RemoteTab',
                                                    'Show thumbnails of non-text slides in remote and stage view.'))
        self.app_group_box.setTitle(translate('RemotePlugin.RemoteTab', 'Remote App'))
        self.app_qr_description_label.setText(
            translate('RemotePlugin.RemoteTab',
                      'Scan the QR code or click <a href="{qr}">download</a> to download an app for your mobile device'
                      ).format(qr='https://openlp.org/#mobile-app-downloads'))
        self.user_login_group_box.setTitle(translate('RemotePlugin.RemoteTab', 'User Authentication'))
        self.aa = UiStrings()
        self.update_site_group_box.setTitle(UiStrings().WebDownloadText)
        self.user_id_label.setText(translate('RemotePlugin.RemoteTab', 'User id:'))
        self.password_label.setText(translate('RemotePlugin.RemoteTab', 'Password:'))
        self.current_version_label.setText(translate('RemotePlugin.RemoteTab', 'Current Version number:'))
        self.master_version_label.setText(translate('RemotePlugin.RemoteTab', 'Latest Version number:'))

    def set_urls(self):
        """
        Update the display based on the data input on the screen
        """
        ip_address = self.get_ip_address(self.address_edit.text())
        http_url = 'http://{url}:{text}/'.format(url=ip_address, text=self.port_spin_box.text())
        self.remote_url.setText('<a href="{url}">{url}</a>'.format(url=http_url))
        http_url_temp = http_url + 'stage'
        self.stage_url.setText('<a href="{url}">{url}</a>'.format(url=http_url_temp))
        http_url_temp = http_url + 'chords'
        self.chords_url.setText('<a href="{url}">{url}</a>'.format(url=http_url_temp))
        http_url_temp = http_url + 'main'
        self.live_url.setText('<a href="{url}">{url}</a>'.format(url=http_url_temp))

    @staticmethod
    def get_ip_address(ip_address):
        """
        returns the IP address in dependency of the passed address
        ip_address == 0.0.0.0: return the IP address of the first valid interface
        else: return ip_address
        """
        if ip_address == ZERO_URL:
            interfaces = QtNetwork.QNetworkInterface.allInterfaces()
            for interface in interfaces:
                if not interface.isValid():
                    continue
                if not (interface.flags() & (QtNetwork.QNetworkInterface.IsUp | QtNetwork.QNetworkInterface.IsRunning)):
                    continue
                for address in interface.addressEntries():
                    ip = address.ip()
                    if ip.protocol() == QtNetwork.QAbstractSocket.IPv4Protocol and \
                       ip != QtNetwork.QHostAddress.LocalHost:
                        return ip.toString()
        return ip_address

    def load(self):
        """
        Load the configuration and update the server configuration if necessary
        """
        self.port_spin_box.setText(str(Settings().value(self.settings_section + '/port')))
        self.address_edit.setText(Settings().value(self.settings_section + '/ip address'))
        self.twelve_hour = Settings().value(self.settings_section + '/twelve hour')
        self.twelve_hour_check_box.setChecked(self.twelve_hour)
        self.thumbnails = Settings().value(self.settings_section + '/thumbnails')
        self.thumbnails_check_box.setChecked(self.thumbnails)
        self.user_login_group_box.setChecked(Settings().value(self.settings_section + '/authentication enabled'))
        self.user_id.setText(Settings().value(self.settings_section + '/user id'))
        self.password.setText(Settings().value(self.settings_section + '/password'))
        self.current_version_value.setText(Settings().value('remotes/download version'))
        self.master_version_value.setText(Registry().get_flag('website_version'))
        if self.master_version_value.text() == self.current_version_value.text():
            self.update_site_group_box.setEnabled(False)
        self.set_urls()

    def save(self):
        """
        Save the configuration and update the server configuration if necessary
        """
        if Settings().value(self.settings_section + '/ip address') != self.address_edit.text():
            self.settings_form.register_post_process('remotes_config_updated')
        Settings().setValue(self.settings_section + '/ip address', self.address_edit.text())
        Settings().setValue(self.settings_section + '/twelve hour', self.twelve_hour)
        Settings().setValue(self.settings_section + '/thumbnails', self.thumbnails)
        Settings().setValue(self.settings_section + '/authentication enabled', self.user_login_group_box.isChecked())
        Settings().setValue(self.settings_section + '/user id', self.user_id.text())
        Settings().setValue(self.settings_section + '/password', self.password.text())
        self.generate_icon()
        if self.update_site_group_box.isChecked():
            self.settings_form.register_post_process('download_website')

    def on_twelve_hour_check_box_changed(self, check_state):
        """
        Toggle the 12 hour check box.
        """
        self.twelve_hour = False
        # we have a set value convert to True/False
        if check_state == QtCore.Qt.Checked:
            self.twelve_hour = True

    def on_thumbnails_check_box_changed(self, check_state):
        """
        Toggle the thumbnail check box.
        """
        self.thumbnails = False
        # we have a set value convert to True/False
        if check_state == QtCore.Qt.Checked:
            self.thumbnails = True

    def generate_icon(self):
        """
        Generate icon for main window
        """
        self.remote_server_icon.hide()
        icon = QtGui.QImage(':/remote/network_server.png')
        icon = icon.scaled(80, 80, QtCore.Qt.KeepAspectRatio, QtCore.Qt.SmoothTransformation)
        if Settings().value(self.settings_section + '/authentication enabled'):
            overlay = QtGui.QImage(':/remote/network_auth.png')
            overlay = overlay.scaled(60, 60, QtCore.Qt.KeepAspectRatio, QtCore.Qt.SmoothTransformation)
            painter = QtGui.QPainter(icon)
            painter.drawImage(20, 0, overlay)
            painter.end()
        self.remote_server_icon.setPixmap(QtGui.QPixmap.fromImage(icon))
        self.remote_server_icon.show()