from PyQt5.QtCore import QThread, pyqtSignal
from helpers.xmlhandler import XMLHandler
import os


class Sign(QThread):
    status_bar_signal = pyqtSignal(str)
    sign_button_signal = pyqtSignal(bool)
    progress_bar_signal = pyqtSignal(bool)
    message_signal = pyqtSignal(tuple)

    def __init__(self, parent, data):
        super(Sign, self).__init__(parent)
        self.data = data

    def run(self):
        if 'file' in self.data and self.sign_file(self.data['file']):
            self.change_status('XML successfully signed.', 'Signing successful')
        elif 'directory' in self.data and self.sign_arrange_directory(self.data['directory']):
            self.change_status('XML successfully signed and files arranged.', 'Signing & arranging successful')

    def sign_file(self, path):
        try:
            xml_file = XMLHandler(path, self.data['config']['xmlreftype'])
            if not xml_file.valid(self.data['config']['xmlschema']):
                self.change_status('XML file does not comply schema.', 'XML file error', False)
            xml_file.sign(self.data['config']['certificate'], self.data['password'])
            return xml_file
        except BaseException as e:
            self.change_status(str(e), 'Signing error', False)
            return None

    def sign_arrange_directory(self, path):
        files = list()
        extensions = list()
        xml_path = None
        for file in os.listdir(path):
            filename, extension = os.path.splitext(file)
            extension = extension.lower()
            extensions.append(extension)
            if extension == '.xml':
                if xml_path is None:
                    xml_path = os.path.join(path, file)
                else:
                    break
            files.append((file, extension))
        if len(extensions) != len(set(extensions)):
            self.change_status('There are multiple files with same extension in directory.', 'Arranging error', False)
            return False
        elif xml_path is None:
            self.change_status('There is no XML file in directory.', 'Signing error', False)
            return False
        xml_file = self.sign_file(xml_path)
        if not xml_file:
            return False
        general_filename = xml_file.get_general_filename()
        for file, extension in files:
            try:
                os.rename(os.path.join(path, file), os.path.join(path, general_filename + extension))
            except:
                self.change_status('Something went wrong with arranging files.', 'Arranging error', False)
                return False
        return True

    def change_status(self, message, status_msg, success=True):
        self.message_signal.emit((message, success))
        self.status_bar_signal.emit(status_msg)
        self.progress_bar_signal.emit(False)
        self.sign_button_signal.emit(True)