# coding: utf-8
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"""
This module contains utilitaries used by other dialog modules.
"""

__authors__ = ["V. Valls"]
__license__ = "MIT"
__date__ = "25/10/2017"

import os
import types

from silx.gui import qt


def samefile(path1, path2):
    """Portable :func:`os.path.samepath` function.

    :param str path1: A path to a file
    :param str path2: Another path to a file
    :rtype: bool
    """
    if path1 == path2:
        return True
    if path1 == "":
        return False
    if path2 == "":
        return False
    return os.path.samefile(path1, path2)


def findClosestSubPath(hdf5Object, path):
    """Find the closest existing path from the hdf5Object using a subset of the
    provided path.

    Returns None if no path found. It is possible if the path is a relative
    path.

    :param h5py.Node hdf5Object: An HDF5 node
    :param str path: A path
    :rtype: str
    """
    if path in ["", "/"]:
        return "/"
    names = path.split("/")
    if path[0] == "/":
        names.pop(0)
    for i in range(len(names)):
        n = len(names) - i
        path2 = "/".join(names[0:n])
        if path2 == "":
            return ""
        if path2 in hdf5Object:
            return path2

    if path[0] == "/":
        return "/"
    return None


def patchToConsumeReturnKey(widget):
    """
    Monkey-patch a widget to consume the return key instead of propagating it
    to the dialog.
    """
    assert(not hasattr(widget, "_oldKeyPressEvent"))

    def keyPressEvent(self, event):
        k = event.key()
        result = self._oldKeyPressEvent(event)
        if k in [qt.Qt.Key_Return, qt.Qt.Key_Enter]:
            event.accept()
        return result

    widget._oldKeyPressEvent = widget.keyPressEvent
    widget.keyPressEvent = types.MethodType(keyPressEvent, widget)
