# Python imports
import os

# Lib imports
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk

# Application imports



class DialogSignalsMixin():
    def on_open_clicked(self, param):
        file_chooser = Gtk.FileChooserDialog('Open', self.window, Gtk.FileChooserAction.OPEN, (Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL, Gtk.STOCK_OPEN, Gtk.ResponseType.OK))

        file_filter = Gtk.FileFilter()
        file_filter.set_name('XML files')
        file_filter.add_pattern('*.xml')
        file_chooser.add_filter(file_filter)

        file_filter = Gtk.FileFilter()
        file_filter.set_name('All files')
        file_filter.add_pattern('*')
        file_chooser.add_filter(file_filter)

        file_chooser.set_default_response(Gtk.ResponseType.OK)
        file_chooser.set_current_folder(os.path.expanduser('~'))

        path     = None
        response = file_chooser.run()
        if response == Gtk.ResponseType.OK:
            path = file_chooser.get_filename()
            if path and not os.access(path, os.R_OK):
                abspath = os.path.abspath(path)
                self.message_dialog(Gtk.MessageType.ERROR, ('Could not open file "%s"') % abspath, ('The file "%s" could not be opened. ' 'Permission denied.') %  abspath, file_chooser)
                path = None

        file_chooser.destroy()
        if not path: return
        self.load_scheme(path)

    def on_save_clicked(self, param):
        if not self.origSchemeFile:
            filename = run_save_as_dialog(self.window, self.entryId.get_text() + '.xml')

            if filename and not '.' in os.path.basename(filename):
                filename = f"{filename}.xml"

            if filename:
                self.write_scheme(filename, self.entryId.get_text())
                self.origSchemeFile = filename
        else:
            self.write_scheme(self.origSchemeFile, self.entryId.get_text())

    def on_save_as_clicked(self, param):
        filename = run_save_as_dialog(self.window, self.entryId.get_text() + '.xml')
        if filename and not '.' in os.path.basename(filename):
            filename = f"{filename}.xml"

        if filename:
            self.write_scheme(filename, self.entryId.get_text())
            self.origSchemeFile = filename


    def message_dialog(
        dialog_type,
        short_msg,
        long_msg = None,
        parent  = None,
        buttons = Gtk.ButtonsType.OK,
        additional_buttons = None
    ):
        dialog = Gtk.MessageDialog(parent = parent, flags = Gtk.DialogFlags.MODAL, type = dialog_type, buttons = buttons)

        if additional_buttons:
            dialog.add_buttons(*additional_buttons)

        dialog.set_markup(short_msg)
        if long_msg:
            if isinstance(long_msg, Gtk.Widget):
                widget = long_msg
            elif isinstance(long_msg, str):
                widget = Gtk.Label()
                widget.set_markup(long_msg)
            else:
                raise TypeError('"long_msg" must be a Gtk.Widget or a string')

            expander = Gtk.Expander(label = 'Click here for details')
            expander.set_border_width(6)
            expander.add(widget)
            dialog.vbox.pack_end(expander, True, True, 0)

        dialog.show_all()
        response = dialog.run()
        dialog.destroy()

        return response

    def run_save_as_dialog(parent, current_name):
        file_chooser = Gtk.FileChooserDialog('Save As', parent, Gtk.FileChooserAction.SAVE, (Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL, Gtk.STOCK_SAVE, Gtk.ResponseType.OK))

        file_filter = Gtk.FileFilter()
        file_filter.set_name('XML files')
        file_filter.add_pattern('*.xml')
        file_chooser.add_filter(file_filter)

        file_filter = Gtk.FileFilter()
        file_filter.set_name('All files')
        file_filter.add_pattern('*')
        file_chooser.add_filter(file_filter)

        file_chooser.set_default_response(Gtk.ResponseType.OK)
        file_chooser.set_current_folder( os.path.expanduser('~') )

        if current_name:
            file_chooser.set_current_name(current_name)

        file_chooser.set_default_response(Gtk.ResponseType.OK)

        path = None
        while True:
            response = file_chooser.run()
            if response != Gtk.ResponseType.OK:
                path = None
                break

            path = file_chooser.get_filename()
            if not os.path.exists(path): break

            sub_msg_1 = ('A file named "%s" already exists') % os.path.abspath(path)
            sub_msg_2 = ('Do you which to replace it with the current project?')
            text      = '<span weight="bold" size="larger">%s</span>\n\n%s\n' % (sub_msg_1, sub_msg_2)
            result    = message_dialog(Gtk.MessageType.ERROR, text, parent = parent, buttons = Gtk.ButtonsType.NONE, additional_buttons = (Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL, 'Replace', Gtk.ResponseType.YES))

            if result == Gtk.ResponseType.YES: break

        file_chooser.destroy()
        return path