"""macostools - Various utility functions for MacOS.

mkalias(src, dst) - Create a finder alias 'dst' pointing to 'src'
copy(src, dst) - Full copy of 'src' to 'dst'
"""

from warnings import warnpy3k
warnpy3k("In 3.x, the macostools module is removed.")

from Carbon import Res
from Carbon import File, Files
import os
import MacOS
try:
    openrf = MacOS.openrf
except AttributeError:
    # Backward compatibility
    openrf = open

Error = 'macostools.Error'

BUFSIZ=0x80000      # Copy in 0.5Mb chunks

COPY_FLAGS = (Files.kIsStationary|Files.kNameLocked|Files.kHasBundle|
              Files.kIsInvisible|Files.kIsAlias)

#
# Not guaranteed to be correct or stay correct (Apple doesn't tell you
# how to do this), but it seems to work.
#
def mkalias(src, dst, relative=None):
    """Create a finder alias"""
    srcfsr = File.FSRef(src)
    # The next line will fail under unix-Python if the destination
    # doesn't exist yet. We should change this code to be fsref-based.
    dstdir, dstname = os.path.split(dst)
    if not dstdir: dstdir = os.curdir
    dstdirfsr = File.FSRef(dstdir)
    if relative:
        relativefsr = File.FSRef(relative)
        # ik mag er geen None in stoppen :-(
        alias = File.FSNewAlias(relativefsr, srcfsr)
    else:
        alias = srcfsr.FSNewAliasMinimal()

    dstfsr, dstfss = Res.FSCreateResourceFile(dstdirfsr, unicode(dstname),
        File.FSGetResourceForkName())
    h = Res.FSOpenResourceFile(dstfsr, File.FSGetResourceForkName(), 3)
    resource = Res.Resource(alias.data)
    resource.AddResource('alis', 0, '')
    Res.CloseResFile(h)

    dstfinfo = dstfss.FSpGetFInfo()
    dstfinfo.Flags = dstfinfo.Flags|0x8000    # Alias flag
    dstfss.FSpSetFInfo(dstfinfo)

def mkdirs(dst):
    """Make directories leading to 'dst' if they don't exist yet"""
    if dst == '' or os.path.exists(dst):
        return
    head, tail = os.path.split(dst)
    if os.sep == ':' and not ':' in head:
        head = head + ':'
    mkdirs(head)
    os.mkdir(dst, 0777)

def touched(dst):
    """Tell the finder a file has changed. No-op on MacOSX."""
    import warnings
    warnings.warn("macostools.touched() has been deprecated",
                    DeprecationWarning, 2)

def touched_ae(dst):
    """Tell the finder a file has changed"""
    pardir = os.path.split(dst)[0]
    if not pardir:
        pardir = os.curdir
    import Finder
    f = Finder.Finder()
    f.update(File.FSRef(pardir))

def copy(src, dst, createpath=0, copydates=1, forcetype=None):
    """Copy a file, including finder info, resource fork, etc"""
    src = File.pathname(src)
    dst = File.pathname(dst)
    if createpath:
        mkdirs(os.path.split(dst)[0])

    ifp = open(src, 'rb')
    ofp = open(dst, 'wb')
    d = ifp.read(BUFSIZ)
    while d:
        ofp.write(d)
        d = ifp.read(BUFSIZ)
    ifp.close()
    ofp.close()

    ifp = openrf(src, '*rb')
    ofp = openrf(dst, '*wb')
    d = ifp.read(BUFSIZ)
    while d:
        ofp.write(d)
        d = ifp.read(BUFSIZ)
    ifp.close()
    ofp.close()

    srcfss = File.FSSpec(src)
    dstfss = File.FSSpec(dst)
    sf = srcfss.FSpGetFInfo()
    df = dstfss.FSpGetFInfo()
    df.Creator, df.Type = sf.Creator, sf.Type
    if forcetype is not None:
        df.Type = forcetype
    df.Flags = (sf.Flags & COPY_FLAGS)
    dstfss.FSpSetFInfo(df)
    if copydates:
        srcfsr = File.FSRef(src)
        dstfsr = File.FSRef(dst)
        catinfo, _, _, _ = srcfsr.FSGetCatalogInfo(Files.kFSCatInfoAllDates)
        dstfsr.FSSetCatalogInfo(Files.kFSCatInfoAllDates, catinfo)

def copytree(src, dst, copydates=1):
    """Copy a complete file tree to a new destination"""
    if os.path.isdir(src):
        mkdirs(dst)
        files = os.listdir(src)
        for f in files:
            copytree(os.path.join(src, f), os.path.join(dst, f), copydates)
    else:
        copy(src, dst, 1, copydates)