# -*- coding: utf-8 -*-
#
# Copyright (C) 2015 GNS3 Technologies Inc.
#
# 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, either version 3 of the License, or
# (at your option) any later version.
#
# 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, see <http://www.gnu.org/licenses/>.

"""
Wizard for Docker containers.
"""

from gns3.qt import QtGui, QtWidgets
from gns3.dialogs.vm_wizard import VMWizard
from gns3.compute_manager import ComputeManager

from ..ui.docker_vm_wizard_ui import Ui_DockerVMWizard
from .. import Docker


class DockerVMWizard(VMWizard, Ui_DockerVMWizard):
    """
    Wizard to create a Docker container.

    :param docker_containers: existing Docker containers
    :param parent: parent widget
    """

    def __init__(self, docker_containers, parent):

        super().__init__(docker_containers, parent)
        self._docker_containers = docker_containers
        self.setPixmap(QtWidgets.QWizard.LogoPixmap, QtGui.QPixmap(":/symbols/docker_guest.svg"))

        self.uiNewImageRadioButton.setChecked(True)
        self._existingImageRadioButtonToggledSlot(False)
        self.uiExistingImageRadioButton.toggled.connect(self._existingImageRadioButtonToggledSlot)

        if ComputeManager.instance().localPlatform().startswith("win") or ComputeManager.instance().localPlatform().startswith("darwin"):
            # Cannot use Docker locally on Windows and Mac
            self._disableLocalServer()

    def _existingImageRadioButtonToggledSlot(self, status):

        if self.uiExistingImageRadioButton.isChecked():
            self.uiImageLineEdit.hide()
            self.uiImageNameLabel.hide()
            self.uiImageListLabel.show()
            self.uiImageListComboBox.show()
        else:
            self.uiImageNameLabel.show()
            self.uiImageLineEdit.show()
            self.uiImageListLabel.hide()
            self.uiImageListComboBox.hide()

    def initializePage(self, page_id):

        super().initializePage(page_id)
        if self.page(page_id) == self.uiImageWizardPage:
            Docker.instance().getDockerImagesFromServer(self._compute_id, self._getDockerImagesFromServerCallback)

    def _getDockerImagesFromServerCallback(self, result, error=False, **kwargs):
        """
        Callback for getDockerImagesFromServer.

        :param progress_dialog: QProgressDialog instance
        :param result: server response
        :param error: indicates an error (boolean)
        """

        if error:
            QtWidgets.QMessageBox.critical(self, "Docker images", "{}".format(result["message"]))
        else:
            self.uiImageListComboBox.clear()
            if len(result) == 0:
                self.uiNewImageRadioButton.setChecked(True)
            else:
                self.uiExistingImageRadioButton.setChecked(True)
                for image in result:
                    self.uiImageListComboBox.addItem(image["image"], image)

    def validateCurrentPage(self):
        """
        Validates the server.
        """

        if super().validateCurrentPage() is False:
            return False

        if self.currentPage() == self.uiImageWizardPage:
            if self.uiImageListComboBox.currentIndex() < 0 and self.uiExistingImageRadioButton.isChecked():
                QtWidgets.QMessageBox.critical(self, "Docker images", "There are no Docker images selected!")
                return False
            self.uiNameLineEdit.setText(self._getImageName().split(":")[0].replace("/", "-"))

        if self.currentPage() == self.uiNameWizardPage:
            if "/" in self.uiNameLineEdit.text():
                QtWidgets.QMessageBox.critical(self, "Container name", "/ is not allowed in container name")
                return False
            if self.uiNameLineEdit.text() in [d["name"] for d in self._docker_containers.values()]:
                QtWidgets.QMessageBox.critical(self, "Container name", "This name already exist!")
                return False
        return True

    def _getImageName(self):

        if self.uiExistingImageRadioButton.isChecked():
            index = self.uiImageListComboBox.currentIndex()
            return self.uiImageListComboBox.itemText(index)
        else:
            name = self.uiImageLineEdit.text()
            return name

    def getSettings(self):
        """
        Returns the settings set in this Wizard.

        :returns: settings dict
        """

        image = self._getImageName()
        start_command = self.uiStartCommandLineEdit.text()
        name = self.uiNameLineEdit.text()

        settings = {
            "image": image,
            "compute_id": self._compute_id,
            "adapters": self.uiAdaptersSpinBox.value(),
            "name": name,
            "environment": self.uiEnvironmentTextEdit.toPlainText(),
            "start_command": start_command,
            "console_type": self.uiConsoleTypeComboBox.currentText(),
        }
        return settings
