import iutil
import os
import isys
from snack import *
from textw.constants import *
from text import _

class PartitionMethod:
    def __call__(self, screen, todo):
	if todo.instClass.partitions:
	    todo.skipFdisk = 1
	    return INSTALL_NOOP

	rc = ButtonChoiceWindow(screen, _("Disk Setup"),
	    _("Disk Druid is a tool for partitioning and setting up mount "
	      "points. It is designed to be easier to use than Linux's "
	      "traditional disk partitioning sofware, fdisk, as well "
	      "as more powerful. However, there are some cases where fdisk "
	      "may be preferred.\n"
	      "\n"
	      "Which tool would you like to use?"),
	    [ (_("Disk Druid"), "dd") , (_("fdisk"), "fd"), 
	      (_("Back"), "back") ], width = 50)

	if rc == "back":
	    return INSTALL_BACK
	elif rc == "dd":
	    todo.skipFdisk = 1
	else:
	    todo.skipFdisk = 0

	return INSTALL_OK

class ManualPartitionWindow:
    def __call__(self, screen, todo):
	from newtpyfsedit import fsedit        

	if todo.skipFdisk: return INSTALL_NOOP
	
	driveNames = todo.fstab.driveList()
	drives = todo.fstab.drivesByName()

	choices = []
	haveEdited = 0

	for device in driveNames:
	    descrip = drives[device]
	    if descrip:
		choices.append("/dev/%s - %s" % (device, descrip))
	    else:
		choices.append("/dev/%s" % (device,))

        button = None
	while button != "done" and button != "back":
	    (button, choice) = \
		 ListboxChoiceWindow(screen, _("Disk Setup"),
		_("To install Red Hat Linux, you must have at least one "
		     "partition of 150 MB dedicated to Linux. We suggest "
		     "placing that partition on one of the first two hard "
		     "drives in your system so you can boot into Linux "
		     "with LILO."), choices,
		[ (_("Done"), "done") , (_("Edit"), "edit"), 
		  (_("Back"), "back") ], width = 50)

	    if button != "done" and button != "back":
		haveEdited = 1
		# free our fd's to the hard drive -- we have to 
		# fstab.rescanDrives() after this or bad things happen!
		if not haveEdited:
		    todo.fstab.closeDrives()
		    todo.fstab.setReadonly(1)
		device = driveNames[choice]
		screen.suspend ()
		if os.access("/sbin/fdisk", os.X_OK):
		    path = "/sbin/fdisk"
		else:
		    path = "/usr/sbin/fdisk"
                    
                try:
                    isys.makeDevInode(device, '/tmp/' + device)
                except:
                    # XXX FIXME
                    pass
		iutil.execWithRedirect (path, [ path, "/tmp/" + device ])
                try:
                    os.remove ('/tmp/' + device)
                except:
                    # XXX fixme
                    pass
		screen.resume ()

	todo.fstab.rescanPartitions()

	if button == "back":
	    return INSTALL_BACK

	return INSTALL_OK

class AutoPartitionWindow:
    def __call__(self, screen, todo):
	druid = None

	if todo.instClass.partitions:
	    druid = \
		todo.fstab.attemptPartitioning(todo.instClass.partitions,
					       todo.instClass.clearParts)

	if not druid:
	    # auto partitioning failed
	    todo.fstab.setRunDruid(1)
	    return

	if not todo.getPartitionWarningText():
	    todo.fstab.setRunDruid(0)
	    todo.fstab.setDruid(druid, todo.instClass.raidList)

	    # sets up lilo for raid boot partitions during kickstart
	    todo.lilo.allowLiloLocationConfig(todo.fstab)

	    todo.fstab.formatAllFilesystems()
	    todo.instClass.addToSkipList("format")
	    return

	(rc, choice) = ListboxChoiceWindow(screen, _("Automatic Partitioning"),
	    _("%s\n\nIf you don't want to do this, you can continue with "
	      "this install by partitioning manually, or you can go back "
	      "and perform a fully customized installation.") % 
		    (todo.getPartitionWarningText(), ),
	    [_("Continue"), _("Manually partition")], 
	    buttons = basicButtons, default = _("Continue"))

	if (rc == "back"): 
	    # This happens automatically when we go out of scope, but it's
	    # important so let's be explicit
	    druid = None
	    return INSTALL_BACK

        if (choice == 1):
	    todo.fstab.setRunDruid(1)
	    todo.fstab.rescanPartitions()
	    todo.instClass.removeFromSkipList("format")
	else:
	    todo.fstab.setRunDruid(0)
	    todo.fstab.setDruid(druid, todo.instClass.raidList)
	    todo.lilo.allowLiloLocationConfig(todo.fstab)
	    todo.fstab.formatAllFilesystems()
	    todo.instClass.addToSkipList("format")

class PartitionWindow:
    def __call__(self, screen, todo):
	dir = INSTALL_NOOP
	if todo.fstab.getRunDruid():
	    dir = todo.fstab.runDruid()

	# runDruid returns None when it means INSTALL_OK
        if not dir:
	    dir = INSTALL_OK

        return dir

class TurnOnSwapWindow:

    beenTurnedOn = 0

    def __call__(self, screen, todo):
	if self.beenTurnedOn or (iutil.memInstalled() > 34000):
	    return INSTALL_NOOP

        if not todo.instClass.earlySwapOn:
	    rc = ButtonChoiceWindow(screen, _("Low Memory"),
		       _("As you don't have much memory in this machine, we "
			 "need to turn on swap space immediately. To do this "
			 "we'll have to write your new partition table to the "
			 "disk immediately. Is that okay?"),
		       [ (_("Yes"), "yes"), (_("No"), "back") ], width = 50)

	    if (rc == "back"):
		return INSTALL_BACK

        todo.fstab.savePartitions ()
	todo.fstab.turnOnSwap()
	todo.ddruidAlreadySaved = 1
	self.beenTurnedOn = 1

	return INSTALL_OK

class FormatWindow:
    def __call__(self, screen, todo):
        tb = TextboxReflowed (55,
                              _("What partitions would you like to "
                                "format? We strongly suggest formatting "
                                "all of the system partitions, including "
                                "/, /usr, and /var. There is no need to "
                                "format /home or /usr/local if they have "
                                "already been configured during a "
                                "previous install."))

	mounts = todo.fstab.mountList()
        height = min (screen.height - 12, len (mounts))
        
        ct = CheckboxTree(height = height)

	gotOne = 0
	for (mount, dev, fstype, format, size) in mounts:
            if fstype == "ext2":
		gotOne = 1
                ct.append("/dev/%s   %s" % (dev, mount), dev, format)

	if not gotOne: return INSTALL_NOOP

        cb = Checkbox (_("Check for bad blocks during format"),
			todo.fstab.getBadBlockCheck())

        bb = ButtonBar (screen, ((_("OK"), "ok"), (_("Back"), "back")))

        g = GridForm (screen, _("Choose Partitions to Format"), 1, 4)
        g.add (tb, 0, 0, (0, 0, 0, 1))
        g.add (ct, 0, 1)
        g.add (cb, 0, 2, (0, 1, 0, 1))
        g.add (bb, 0, 3, growx = 1)

        result = g.runOnce()

	for (mount, dev, fstype, format, size) in mounts:
	    todo.fstab.setFormatFilesystem(dev, 0)

        for dev in ct.getSelection():
	    todo.fstab.setFormatFilesystem(dev, 1)

        todo.fstab.setBadBlockCheck(cb.selected ())

        rc = bb.buttonPressed (result)

        if rc == "back":
            return INSTALL_BACK
        return INSTALL_OK


class LoopSizeWindow:

    def __call__(self, screen, todo):
	if not todo.fstab.rootOnLoop():
	    return INSTALL_NOOP

	avail = apply(isys.spaceAvailable, todo.fstab.getRootDevice())
	(size, swapSize) = todo.fstab.getLoopbackSize()
	if not size:
	    size = avail / 2
	    swapSize = 32

	sizeEntry = Entry(6, "%d" % (size,))
	swapSizeEntry = Entry(6, "%d" % (swapSize,))

	while 1:
	    (rc, ent) = EntryWindow(screen, _("Root Filesystem Size"),
		_("You've chosen to put your root filesystem in a file on "
		  "an already-existing DOS or Windows filesystem. How large, "
		  "in megabytes, should would you like the root filesystem "
		  "to be, and how much swap space would you like? They must "
		  "total less then %d megabytes in size." % (avail, )),
		    [ ( _("Root filesystem size"), sizeEntry ),
		      ( _("Swap space"), swapSizeEntry ) ],
		    buttons = [ (_("OK"), "ok"), (_("Back"), "back") ] )

	    if rc == "back": return INSTALL_BACK

	    try:
		size = int(sizeEntry.value())
		swapSize = int(swapSizeEntry.value())
	    except:
		ButtonChoiceWindow(screen, _("Bad Size"),
			_("The size you enter must be a number."),
			buttons = [ _("OK") ])
		continue

	    if size + swapSize >= avail:
		ButtonChoiceWindow(screen, _("Bad Size"),
			_("The total size must be smaller then the amount of "
			  "free space on the disk, which is %d megabytes."
				% (avail, )),
			buttons = [ _("OK") ])
		continue

	    break

	todo.fstab.setLoopbackSize(size, swapSize)

	return INSTALL_NOOP