#
# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2000-2007  Donald N. Allingham
# Copyright (C) 2010       Michiel D. Nauta
# Copyright (C) 2011       Tim G L Lyons
# Copyright (C) 2017       Nick Hall
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty 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.
#

"""
Attribute class for Gramps.
"""

#-------------------------------------------------------------------------
#
# Gramps modules
#
#-------------------------------------------------------------------------
from .secondaryobj import SecondaryObject
from .privacybase import PrivacyBase
from .citationbase import CitationBase
from .notebase import NoteBase
from .attrtype import AttributeType
from .const import IDENTICAL, EQUAL, DIFFERENT
from ..const import GRAMPS_LOCALE as glocale
_ = glocale.translation.gettext

#-------------------------------------------------------------------------
#
# Root object for Attribute
#
#-------------------------------------------------------------------------
class AttributeRoot(SecondaryObject, PrivacyBase):
    """
    Provide a simple key/value pair for describing properties.
    Used to store descriptive information.

    In GEDCOM only used for Persons:
    Individual attributes should describe situations that may be permanent or
    temporary (start at some date, end at some date, etc.), may be associated
    to a place (a position held, residence, etc.) or may not (eye colour,
    height, caste, profession, etc.).  They may have sources and notes and
    media.
    Compare with :class:`~.event.Event`

    Gramps at the moment does not support this GEDCOM Attribute structure.
    """

    def __init__(self, source=None):
        """
        Create a new Attribute object, copying from the source if provided.
        """
        PrivacyBase.__init__(self, source)

        #type structure depends on inheriting classes
        self.type = None
        self.value = None

    def __str__(self):
        return str(self.value)

    def serialize(self):
        """
        Convert the object to a serialized tuple of data.
        """
        return (PrivacyBase.serialize(self),
                self.type.serialize(), self.value)

    def unserialize(self, data):
        """
        Convert a serialized tuple of data to an object.
        """
        (privacy, the_type, self.value) = data
        PrivacyBase.unserialize(self, privacy)
        self.type.unserialize(the_type)
        return self

    def get_text_data_list(self):
        """
        Return the list of all textual attributes of the object.

        :returns: Returns the list of all textual attributes of the object.
        :rtype: list
        """
        return [self.value]

    def get_text_data_child_list(self):
        """
        Return the list of child objects that may carry textual data.

        :returns: Returns the list of child objects that may carry textual data.
        :rtype: list
        """
        return []

    def get_note_child_list(self):
        """
        Return the list of child secondary objects that may refer notes.

        :returns: Returns the list of child secondary child objects that may
                refer notes.
        :rtype: list
        """
        return []

    def get_handle_referents(self):
        """
        Return the list of child objects which may, directly or through
        their children, reference primary objects.

        :returns: Returns the list of objects referencing primary objects.
        :rtype: list
        """
        return []

    def get_referenced_handles(self):
        """
        Return the list of (classname, handle) tuples for all directly
        referenced primary objects.

        :returns: List of (classname, handle) tuples for referenced objects.
        :rtype: list
        """
        return []

    def is_equivalent(self, other):
        """
        Return if this attribute is equivalent, that is agrees in type and
        value, to other.

        :param other: The attribute to compare this one to.
        :type other: Attribute
        :returns: Constant indicating degree of equivalence.
        :rtype: int
        """
        if self.type != other.type or self.value != other.value:
            return DIFFERENT
        else:
            if self.is_equal(other):
                return IDENTICAL
            else:
                return EQUAL

    def merge(self, acquisition):
        """
        Merge the content of acquisition into this attribute.

        Lost: type and value of acquisition.

        :param acquisition: the attribute to merge with the present attribute.
        :type acquisition: Attribute
        """
        self._merge_privacy(acquisition)

    def set_type(self, val):
        """Set the type (or key) of the Attribute instance."""
        self.type.set(val)

    def get_type(self):
        """Return the type (or key) or the Attribute instance."""
        return self.type

    def set_value(self, val):
        """Set the value of the Attribute instance."""
        self.value = val

    def get_value(self):
        """Return the value of the Attribute instance."""
        return self.value

#-------------------------------------------------------------------------
#
# Attribute for Person/Family/Media/MediaRef
#
#-------------------------------------------------------------------------
class Attribute(AttributeRoot, CitationBase, NoteBase):

    def __init__(self, source=None):
        """
        Create a new Attribute object, copying from the source if provided.
        """
        AttributeRoot.__init__(self, source)
        CitationBase.__init__(self, source)
        NoteBase.__init__(self, source)

        if source:
            self.type = AttributeType(source.type)
            self.value = source.value
        else:
            self.type = AttributeType()
            self.value = ""
    def serialize(self):
        """
        Convert the object to a serialized tuple of data.
        """
        return (PrivacyBase.serialize(self),
                CitationBase.serialize(self),
                NoteBase.serialize(self),
                self.type.serialize(), self.value)

    def unserialize(self, data):
        """
        Convert a serialized tuple of data to an object.
        """
        (privacy, citation_list, note_list, the_type, self.value) = data
        PrivacyBase.unserialize(self, privacy)
        CitationBase.unserialize(self, citation_list)
        NoteBase.unserialize(self, note_list)
        self.type.unserialize(the_type)
        return self

    @classmethod
    def get_schema(cls):
        """
        Returns the JSON Schema for this class.

        :returns: Returns a dict containing the schema.
        :rtype: dict
        """
        return {
            "type": "object",
            "title": _("Attribute"),
            "properties": {
                "_class": {"enum": [cls.__name__]},
                "private": {"type": "boolean",
                            "title": _("Private")},
                "citation_list": {"type": "array",
                                  "title": _("Citations"),
                                  "items": {"type": "string",
                                            "maxLength": 50}},
                "note_list": {"type": "array",
                              "items": {"type": "string",
                                        "maxLength": 50},
                              "title": _("Notes")},
                "type": AttributeType.get_schema(),
                "value": {"type": "string",
                          "title": _("Value")}
            }
        }

    def get_referenced_handles(self):
        """
        Return the list of (classname, handle) tuples for all directly
        referenced primary objects.

        :returns: List of (classname, handle) tuples for referenced objects.
        :rtype: list
        """
        return self.get_referenced_note_handles() + \
                self.get_referenced_citation_handles()

    def merge(self, acquisition):
        """
        Merge the content of acquisition into this attribute.

        Lost: type and value of acquisition.

        :param acquisition: the attribute to merge with the present attribute.
        :type acquisition: Attribute
        """
        AttributeRoot.merge(self, acquisition)
        self._merge_citation_list(acquisition)
        self._merge_note_list(acquisition)
