# GUI Application automation and testing library
# Copyright (C) 2006-2018 Mark Mc Mahon and Contributors
# https://github.com/pywinauto/pywinauto/graphs/contributors
# http://pywinauto.readthedocs.io/en/latest/credits.html
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright notice,
#   this list of conditions and the following disclaimer in the documentation
#   and/or other materials provided with the distribution.
#
# * Neither the name of pywinauto nor the names of its
#   contributors may be used to endorse or promote products derived from
#   this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

"""Interface for classes which should deal with different backend elements"""

from six import integer_types

class ElementInfo(object):

    """Abstract wrapper for an element"""

    def __repr__(self):
        """Representation of the element info object

        The method prints the following info:
        * type name as a module name and a class name of the object
        * title of the control or empty string
        * class name of the control
        * unique ID of the control, usually a handle
        """
        return '<{0}, {1}>'.format(self.__str__(), self.handle)

    def __str__(self):
        """Pretty print representation of the element info object

        The method prints the following info:
        * type name as a module name and class name of the object
        * title of the control or empty string
        * class name of the control
        """
        module = self.__class__.__module__
        module = module[module.rfind('.') + 1:]
        type_name = module + "." + self.__class__.__name__

        return "{0} - '{1}', {2}".format(type_name, self.name, self.class_name)

    def set_cache_strategy(self, cached):
        """Set a cache strategy for frequently used attributes of the element"""
        raise NotImplementedError()

    @property
    def handle(self):
        """Return the handle of the element"""
        raise NotImplementedError()

    @property
    def name(self):
        """Return the name of the element"""
        raise NotImplementedError()

    @property
    def rich_text(self):
        """Return the text of the element"""
        raise NotImplementedError()

    @property
    def control_id(self):
        """Return the ID of the control"""
        raise NotImplementedError()

    @property
    def process_id(self):
        """Return the ID of process that controls this element"""
        raise NotImplementedError()

    @property
    def framework_id(self):
        """Return the framework of the element"""
        raise NotImplementedError()

    @property
    def class_name(self):
        """Return the class name of the element"""
        raise NotImplementedError()

    @property
    def enabled(self):
        """Return True if the element is enabled"""
        raise NotImplementedError()

    @property
    def visible(self):
        """Return True if the element is visible"""
        raise NotImplementedError()

    @property
    def parent(self):
        """Return the parent of the element"""
        raise NotImplementedError()

    @property
    def top_level_parent(self):
        """
        Return the top level window of this element

        The TopLevel parent is different from the parent in that the parent
        is the element that owns this element - but it may not be a dialog/main
        window. For example most Comboboxes have an Edit. The ComboBox is the
        parent of the Edit control.

        This will always return a valid window element (if the control has
        no top level parent then the control itself is returned - as it is
        a top level window already!)
        """
        parent = self.parent
        if parent and parent != self.__class__():
            return parent.top_level_parent
        else:
            return self

    def children(self, **kwargs):
        """Return children of the element"""
        raise NotImplementedError()

    def iter_children(self, **kwargs):
        """Iterate over children of element"""
        raise NotImplementedError()

    def has_depth(self, root, depth):
        """Return True if element has particular depth level relative to the root"""
        if self.control_id != root.control_id:
            if depth > 0:
                parent = self.parent
                return parent.has_depth(root, depth - 1)
            else:
                return False
        else:
            return True

    @staticmethod
    def filter_with_depth(elements, root, depth):
        """Return filtered elements with particular depth level relative to the root"""
        if depth is not None:
                if isinstance(depth, integer_types) and depth > 0:
                    return [element for element in elements if element.has_depth(root, depth)]
                else:
                    raise Exception("Depth must be natural number")
        else:
            return elements

    def get_descendants_with_depth(self, depth=None, **kwargs):
        """Return a list of all descendant children of the element with the specified depth"""
        descendants = []

        def walk_the_tree(root, depth, **kwargs):
            if depth == 0:
                return
            for child in root.children(**kwargs):
                descendants.append(child)
                next_depth = None if depth is None else depth - 1
                walk_the_tree(child, next_depth, **kwargs)

        walk_the_tree(self, depth, **kwargs)
        return descendants

    def descendants(self, **kwargs):
        """Return descendants of the element"""
        raise NotImplementedError()

    def iter_descendants(self, **kwargs):
        """Iterate over descendants of the element"""
        depth = kwargs.pop("depth", None)
        if depth == 0:
            return
        for child in self.iter_children(**kwargs):
            yield child
            if depth is not None:
                kwargs["depth"] = depth - 1
            for c in child.iter_descendants(**kwargs):
                yield c

    @property
    def rectangle(self):
        """Return rectangle of element"""
        raise NotImplementedError()

    def dump_window(self):
        """Dump an element to a set of properties"""
        raise NotImplementedError()
