#
# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2000-2006  Donald N. Allingham
# Copyright (C) 2011       Tim G L Lyons
#
# 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, see <https://www.gnu.org/licenses/>.
#

"Import from GEDCOM"

# ------------------------------------------------------------------------
#
# Set up logging
#
# ------------------------------------------------------------------------
import logging

LOG = logging.getLogger(".GedcomImport")

# ------------------------------------------------------------------------
#
# Gramps modules
#
# ------------------------------------------------------------------------
from gramps.gen.const import GRAMPS_LOCALE as glocale

_ = glocale.translation.gettext
from gramps.gen.errors import DbError, GedcomError
from gramps.plugins.lib.libmixin import DbMixin
from gramps.plugins.lib import libgedcom
from gramps.gen.utils.libformatting import ImportInfo

# The following code is necessary to ensure that when Help->Plugin
# Manager->Reload is executed, not only is the top-level exportgedcom file
# reloaded, but also the dependent libgedcom. This ensures that testing can have
# a quick turnround, without having to restart Gramps.
module = __import__(
    "gramps.plugins.lib.libgedcom", fromlist=["gramps.plugins.lib"]
)  # why o why ?? as above!
import importlib

importlib.reload(module)

from gramps.gen.config import config


# -------------------------------------------------------------------------
#
# importData
#
# -------------------------------------------------------------------------
def importData(database, filename, user):
    """
    Try to handle ANSEL encoded files that are not really ANSEL encoded
    """

    if DbMixin not in database.__class__.__bases__:
        database.__class__.__bases__ = (DbMixin,) + database.__class__.__bases__
    try:
        # Opening in utf-8 with universal newline to allow cr, lf, and crlf
        # If the file is really UTF16 or a varient, the next block code will not
        # find anything even if it is there, but this is ok since it won't be
        # ANSEL, or is inconsistent...
        with open(
            filename, "r", encoding="utf-8", errors="replace", newline=None
        ) as ifile:
            ansel = False
            gramps = False
            for index in range(50):
                # Treat the file as though it is UTF-8 since this is the more
                # modern option; and anyway it doesn't really matter as we are
                # only trying to detect a CHAR or SOUR line which is only
                # 7-bit ASCII anyway,  and we ignore anything that can't be
                # translated.
                line = ifile.readline()
                line = line.split()
                if len(line) == 0:
                    break
                if len(line) > 2 and line[1][0:4] == "CHAR" and line[2] == "ANSEL":
                    ansel = True
                if len(line) > 2 and line[1][0:4] == "SOUR" and line[2] == "GRAMPS":
                    gramps = True
    except IOError:
        return

    if not gramps and ansel and user.uistate:
        from gramps.gui.glade import Glade

        top = Glade()
        code = top.get_object("codeset")
        code.set_active(0)
        dialog = top.toplevel
        dialog.set_transient_for(user.uistate.window)
        dialog.run()
        enc = ["ANSEL", "ANSEL", "ANSI", "ASCII", "UTF-8"]
        code_set = enc[code.get_active()]
        dialog.destroy()
    else:
        code_set = ""

    assert isinstance(code_set, str)

    try:
        ifile = open(filename, "rb")
        stage_one = libgedcom.GedcomStageOne(ifile)
        stage_one.parse()

        if code_set:
            stage_one.set_encoding(code_set)
        ifile.seek(0)
        if database.get_feature("skip-import-additions"):  # don't add source or tags
            gedparse = libgedcom.GedcomParser(
                database, ifile, filename, user, stage_one, None, None
            )
        else:
            gedparse = libgedcom.GedcomParser(
                database,
                ifile,
                filename,
                user,
                stage_one,
                config.get("preferences.default-source"),
                (
                    config.get("preferences.tag-on-import-format")
                    if config.get("preferences.tag-on-import")
                    else None
                ),
            )
    except IOError as msg:
        user.notify_error(_("%s could not be opened\n") % filename, str(msg))
        return
    except GedcomError as msg:
        user.notify_error(
            _("Invalid GEDCOM file"),
            _("%s could not be imported") % filename + "\n" + str(msg),
        )
        return

    try:
        read_only = database.readonly
        database.readonly = False
        gedparse.parse_gedcom_file(False)
        database.readonly = read_only
        ifile.close()
    except IOError as msg:
        msg = _("%s could not be opened\n") % filename
        user.notify_error(msg, str(msg))
        return
    except DbError as msg:
        user.notify_db_error(str(msg.value))
        return
    except GedcomError as msg:
        user.notify_error(_("Error reading GEDCOM file"), str(msg))
        return
    ## a "GEDCOM import report" happens in GedcomParser so this is not needed:
    ## (but the imports_test.py unittest currently requires it, so here it is)
    return ImportInfo({_("Results"): _("done")})
