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# Storage configuration spoke classes
#
# Copyright (C) 2011, 2012  Red Hat, Inc.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# the GNU General Public License v.2, or (at your option) any later version.
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY expressed or implied, including the implied warranties 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., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.  Any Red Hat trademarks that are incorporated in the
# source code or documentation are not subject to the GNU General Public
# License and may only be used or replicated with the express permission of
# Red Hat, Inc.
#
# Red Hat Author(s): David Lehman <dlehman@redhat.com>
#

"""
    TODO:

        - add button within sw_needs text in options dialogs 2,3
        - udev data gathering
            - udev fwraid, mpath would sure be nice
        - status/completed
            - what are noteworthy status events?
                - disks selected
                    - exclusiveDisks non-empty
                - sufficient space for software selection
                - autopart selected
                - custom selected
                    - performing custom configuration
                - storage configuration complete
        - spacing and border width always 6

"""

from gi.repository import Gdk, GLib, Gtk
from gi.repository import AnacondaWidgets
from pyanaconda.ui import communication
from pyanaconda.ui.gui import GUIObject
from pyanaconda.ui.gui.spokes import NormalSpoke
from pyanaconda.ui.gui.spokes.lib.cart import SelectedDisksDialog
from pyanaconda.ui.gui.spokes.lib.passphrase import PassphraseDialog
from pyanaconda.ui.gui.spokes.lib.detailederror import DetailedErrorDialog
from pyanaconda.ui.gui.spokes.lib.resize import ResizeDialog
from pyanaconda.ui.gui.categories.storage import StorageCategory
from pyanaconda.ui.gui.utils import enlightbox, gtk_call_once, gtk_thread_wait

from pyanaconda.kickstart import doKickstartStorage
from blivet.size import Size
from blivet.errors import StorageError
from blivet.platform import platform
from pyanaconda.threads import threadMgr, AnacondaThread
from pyanaconda.product import productName
from pyanaconda.flags import flags

from pykickstart.constants import *

import gettext
import sys

_ = lambda x: gettext.ldgettext("anaconda", x)
N_ = lambda x: x
P_ = lambda x, y, z: gettext.ldngettext("anaconda", x, y, z)

import logging
log = logging.getLogger("anaconda")

__all__ = ["StorageSpoke"]

class FakeDiskLabel(object):
    def __init__(self, free=0):
        self.free = free

class FakeDisk(object):
    def __init__(self, name, size=0, free=0, partitioned=True, vendor=None,
                 model=None, serial=None, removable=False):
        self.name = name
        self.size = size
        self.format = FakeDiskLabel(free=free)
        self.partitioned = partitioned
        self.vendor = vendor
        self.model = model
        self.serial = serial
        self.removable = removable

    @property
    def description(self):
        return "%s %s" % (self.vendor, self.model)

def getDisks(devicetree, fake=False):
    if not fake:
        devices = devicetree.devices + devicetree._hidden
        disks = [d for d in devices if d.isDisk and
                                       d.size > 0 and
                                       not d.format.hidden and
                                       not (d.protected and
                                            d.removable)]
    else:
        disks = []
        disks.append(FakeDisk("sda", size=300000, free=10000, serial="00001",
                              vendor="Seagate", model="Monster"))
        disks.append(FakeDisk("sdb", size=300000, free=300000, serial="00002",
                              vendor="Seagate", model="Monster"))
        disks.append(FakeDisk("sdc", size=8000, free=2100, removable=True,
                              vendor="SanDisk", model="Cruzer", serial="00003"))

    return disks

def size_str(mb):
    if isinstance(mb, Size):
        spec = str(mb)
    else:
        spec = "%s mb" % mb

    return str(Size(spec=spec)).upper()

class InstallOptions1Dialog(GUIObject):
    builderObjects = ["options1_dialog"]
    mainWidgetName = "options1_dialog"
    uiFile = "spokes/storage.glade"

    # Response ID codes for all the various buttons on all the dialogs.
    RESPONSE_CANCEL = 0
    RESPONSE_CONTINUE = 1
    RESPONSE_MODIFY_SW = 2
    RESPONSE_RECLAIM = 3
    RESPONSE_QUIT = 4
    RESPONSE_CUSTOM = 5

    # Which radiobutton is selected on the options1 dialog?
    RESPONSE_CONTINUE_NONE = -1
    RESPONSE_CONTINUE_AUTOPART = 0
    RESPONSE_CONTINUE_RECLAIM = 1
    RESPONSE_CONTINUE_CUSTOM = 2

    def __init__(self, *args, **kwargs):
        self.payload = kwargs.pop("payload", None)
        GUIObject.__init__(self, *args, **kwargs)

    def run(self):
        rc = self.window.run()
        self.window.destroy()
        return rc

    def refresh(self, required_space, disk_free, fs_free, autoPartType):
        self.autoPartType = autoPartType
        self.autoPartTypeCombo = self.builder.get_object("options1_combo")
        self.autoPartTypeCombo.set_active(self.autoPartType)

        options_label = self.builder.get_object("options1_label")

        options_text = _("You have <b>%(freeSpace)s</b> of free space, which is "
                         "enough to install %(productName)s.  What would you "
                         "like to do?") % {"freeSpace": disk_free, "productName": productName}
        options_label.set_markup(options_text)

        label = self.builder.get_object("options1_autopart_radio").get_children()[0]
        label.set_markup(_("<span font-desc=\"Cantarell 11\">A_utomatically "
                           "configure my %(productName)s installation to the "
                           "disk(s) I selected and return me to the main "
                           "menu.</span>") % {"productName": productName})
        label.set_line_wrap(True)
        label.set_use_underline(True)

        label = self.builder.get_object("options1_reclaim_radio").get_children()[0]
        label.set_markup(_("<span font-desc=\"Cantarell 11\">I want more space. "
                           "_Guide me through shrinking and/or removing partitions "
                           "so I can have more space for %(productName)s.</span>") % {"productName": productName})
        label.set_line_wrap(True)
        label.set_use_underline(True)

        label = self.builder.get_object("options1_custom_radio").get_children()[0]
        label.set_markup(_("<span font-desc=\"Cantarell 11\">I want to review/_modify "
                           "my disk partitions before continuing.</span>"))
        label.set_line_wrap(True)
        label.set_use_underline(True)

    @property
    def continue_response(self):
        if self.builder.get_object("options1_autopart_radio").get_active():
            return self.RESPONSE_CONTINUE_AUTOPART
        elif self.builder.get_object("options1_reclaim_radio").get_active():
            return self.RESPONSE_CONTINUE_RECLAIM
        elif self.builder.get_object("options1_custom_radio").get_active():
            return self.RESPONSE_CONTINUE_CUSTOM
        else:
            return self.RESPONSE_CONTINUE_NONE

    def _set_free_space_labels(self, disk_free, fs_free):
        disk_free_text = size_str(disk_free)
        self.disk_free_label.set_text(disk_free_text)

        fs_free_text = size_str(fs_free)
        self.fs_free_label.set_text(fs_free_text)

    def _get_sw_needs_text(self, required_space):
        required_space_text = size_str(required_space)
        sw_text = (_("Your current <b>%s</b> software selection requires "
                      "<b>%s</b> of available space.")
                   % (productName, required_space_text))
        return sw_text

    # Methods to handle sensitivity of the modify button.
    def _software_is_ready(self):
        # FIXME:  Would be nicer to just ask the spoke if it's ready.
        return (not threadMgr.get("AnaPayloadThread") and
                not threadMgr.get("AnaSoftwareWatcher") and
                not threadMgr.get("AnaCheckSoftwareThread") and
                self.payload.baseRepo is not None)

    def _check_for_storage_thread(self, button):
        if self._software_is_ready():
            button.set_sensitive(True)
            button.set_has_tooltip(False)
            button.show_all()

            # False means this function should never be called again.
            return False
        else:
            return True

    def _add_button_watcher(self, widgetName):
        # If the payload fetching thread is still running, the user can't go to
        # modify the software selection screen.  Thus, we have to set the button
        # insensitive and wait until software selection is ready to go.
        modify_button = self.builder.get_object(widgetName)
        if not self._software_is_ready():
            modify_button.set_sensitive(False)
            GLib.timeout_add_seconds(1, self._check_for_storage_thread, modify_button)

    # signal handlers
    def on_type_changed(self, combo):
        self.autoPartType = combo.get_active()

class InstallOptions2Dialog(InstallOptions1Dialog):
    builderObjects = ["options2_dialog"]
    mainWidgetName = "options2_dialog"

    def refresh(self, required_space, disk_free, fs_free, autoPartType):
        self.autoPartType = autoPartType
        self.autoPartTypeCombo = self.builder.get_object("options2_combo")
        self.autoPartTypeCombo.set_active(self.autoPartType)

        sw_text = self._get_sw_needs_text(required_space)
        label_text = _("%s\nThe disks you've selected have the following "
                       "amounts of free space:") % sw_text
        self.builder.get_object("options2_label1").set_markup(label_text)

        self.disk_free_label = self.builder.get_object("options2_disk_free_label")
        self.fs_free_label = self.builder.get_object("options2_fs_free_label")
        self._set_free_space_labels(disk_free, fs_free)

        label_text = _("<b>You don't have enough space available to install "
                       "%s</b>.  You can shrink or remove existing partitions "
                       "via our guided reclaim space tool, or you can adjust your "
                       "partitions on your own in the custom partitioning "
                       "interface.") % productName
        self.builder.get_object("options2_label2").set_markup(label_text)

    @property
    def continue_response(self):
        return self.RESPONSE_CONTINUE_NONE

class InstallOptions3Dialog(InstallOptions1Dialog):
    builderObjects = ["options3_dialog"]
    mainWidgetName = "options3_dialog"

    def refresh(self, required_space, disk_free, fs_free, autoPartType):
        sw_text = self._get_sw_needs_text(required_space)
        label_text = (_("%s\nYou don't have enough space available to install "
                        "<b>%s</b>, even if you used all of the free space\n"
                        "available on the selected disks.")
                      % (sw_text, productName))
        self.builder.get_object("options3_label1").set_markup(label_text)

        self.disk_free_label = self.builder.get_object("options3_disk_free_label")
        self.fs_free_label = self.builder.get_object("options3_fs_free_label")
        self._set_free_space_labels(disk_free, fs_free)

        label_text = _("<b>You don't have enough space available to install "
                       "%s</b>, even if you used all of the free space\n"
                       "available on the selected disks.  You could add more "
                       "disks for additional space,\n"
                       "modify your software selection to install a smaller "
                       "version of <b>%s</b>, or quit the installer.") % (productName, productName)
        self.builder.get_object("options3_label2").set_markup(label_text)

        self._add_button_watcher("options3_modify_sw_button")

    @property
    def continue_response(self):
        return self.RESPONSE_CONTINUE_NONE

class StorageChecker(object):
    errors = []
    warnings = []
    _mainSpokeClass = "StorageSpoke"

    def run(self):
        communication.send_not_ready(self._mainSpokeClass)
        threadMgr.add(AnacondaThread(name="AnaCheckStorageThread",
                                     target=self.checkStorage))

    def checkStorage(self):
        communication.send_message(self._mainSpokeClass,
                                   _("Checking storage configuration..."))
        (StorageChecker.errors,
         StorageChecker.warnings) = self.storage.sanityCheck()
        communication.send_ready(self._mainSpokeClass, justUpdate=True)
        for e in StorageChecker.errors:
            log.error(e)
        for w in StorageChecker.warnings:
            log.warn(w)

class StorageSpoke(NormalSpoke, StorageChecker):
    builderObjects = ["storageWindow"]
    mainWidgetName = "storageWindow"
    uiFile = "spokes/storage.glade"

    category = StorageCategory

    # other candidates: computer-symbolic, folder-symbolic
    icon = "drive-harddisk-symbolic"
    title = N_("INSTALLATION _DESTINATION")

    def __init__(self, *args, **kwargs):
        NormalSpoke.__init__(self, *args, **kwargs)
        self.applyOnSkip = True

        self._ready = False
        self.selected_disks = self.data.ignoredisk.onlyuse[:]

        # This list gets set up once in initialize and should not be modified
        # except perhaps to add advanced devices. It will remain the full list
        # of disks that can be included in the install.
        self.disks = []

        if not flags.automatedInstall:
            # default to using autopart for interactive installs
            self.data.autopart.autopart = True

        self.autopart = self.data.autopart.autopart
        self.autoPartType = None
        self.clearPartType = CLEARPART_TYPE_NONE

        self._previous_autopart = False

    def _applyDiskSelection(self, use_names):
        onlyuse = use_names[:]
        for disk in [d for d in self.storage.disks if d.name in onlyuse]:
            onlyuse.extend([d.name for d in disk.ancestors
                                        if d.name not in onlyuse])

        self.data.ignoredisk.onlyuse = onlyuse
        self.data.clearpart.drives = use_names[:]

    def apply(self):
        self._applyDiskSelection(self.selected_disks)
        self.data.autopart.autopart = self.autopart
        self.data.autopart.type = self.autoPartType
        self.data.autopart.encrypted = self.encrypted
        self.data.autopart.passphrase = self.passphrase

        self.clearPartType = CLEARPART_TYPE_NONE

        if self.data.bootloader.bootDrive and \
           self.data.bootloader.bootDrive not in self.selected_disks:
            self.data.bootloader.bootDrive = None
            self.storage.bootloader.stage1_disk = None
            self.storage.bootloader.stage1_device = None

        self.data.clearpart.initAll = True
        self.data.clearpart.type = self.clearPartType
        self.storage.config.update(self.data)
        self.storage.autoPartType = self.data.autopart.type
        self.storage.encryptedAutoPart = self.data.autopart.encrypted
        self.storage.encryptionPassphrase = self.data.autopart.passphrase

        # If autopart is selected we want to remove whatever has been
        # created/scheduled to make room for autopart.
        # If custom is selected, we want to leave alone any storage layout the
        # user may have set up before now.
        self.storage.config.clearNonExistent = self.data.autopart.autopart

    def execute(self):
        # Spawn storage execution as a separate thread so there's no big delay
        # going back from this spoke to the hub while StorageChecker.run runs.
        # Yes, this means there's a thread spawning another thread.  Sorry.
        threadMgr.add(AnacondaThread(name="AnaExecuteStorageThread",
                                     target=self._doExecute))

    def _doExecute(self):
        self._ready = False
        communication.send_not_ready(self.__class__.__name__)
        communication.send_message(self.__class__.__name__,
                               _("Saving storage configuration..."))
        try:
            doKickstartStorage(self.storage, self.data, self.instclass)
        except StorageError as e:
            log.error("storage configuration failed: %s" % e)
            StorageChecker.errors = str(e).split("\n")
            communication.send_message(self.__class__.__name__,
                                   _("Failed to save storage configuration..."))
            self.data.ignoredisk.drives = []
            self.data.ignoredisk.onlyuse = []
            self.storage.config.update(self.data)
            self.storage.reset()
            self.disks = getDisks(self.storage.devicetree)
            # now set ksdata back to the user's specified config
            self._applyDiskSelection(self.selected_disks)
        else:
            if self.autopart:
                # this was already run as part of doAutoPartition. dumb.
                StorageChecker.errors = []
                self.run()
        finally:
            self._ready = True
            communication.send_ready(self.__class__.__name__, justUpdate=True)

    @property
    def completed(self):
        return (threadMgr.get("AnaExecuteStorageThread") is None and
                threadMgr.get("AnaCheckStorageThread") is None and
                (self.data.ignoredisk.onlyuse != [] or
                 flags.automatedInstall) and
                self.storage.rootDevice is not None and
                not self.errors)

    @property
    def ready(self):
        # By default, the storage spoke is not ready.  We have to wait until
        # storageInitialize is done.
        return self._ready

    @property
    def status(self):
        """ A short string describing the current status of storage setup. """
        msg = _("No disks selected")
        if self.data.ignoredisk.onlyuse:
            msg = P_(("%d disk selected"),
                     ("%d disks selected"),
                     len(self.data.ignoredisk.onlyuse)) % len(self.data.ignoredisk.onlyuse)

            if self.errors:
                msg = _("Error checking storage configuration")
            elif self.data.autopart.autopart:
                msg = _("Automatic partitioning selected")
            else:
                msg = _("Custom partitioning selected")

        return msg

    def _on_disk_clicked(self, overview, event):
        # This handler only runs for these two kinds of events, and only for
        # activate-type keys (space, enter) in the latter event's case.
        if not event.type in [Gdk.EventType.BUTTON_PRESS, Gdk.EventType.KEY_RELEASE]:
            return

        if event.type == Gdk.EventType.KEY_RELEASE and \
           event.keyval not in [Gdk.KEY_space, Gdk.KEY_Return, Gdk.KEY_ISO_Enter, Gdk.KEY_KP_Enter, Gdk.KEY_KP_Space]:
              return

        self._update_disk_list()


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