#!/usr/bin/python3

import sys
from pathlib import Path
from PyQt6.QtWidgets import QMessageBox
from PyQt6.QtGui import QFont


class Utils:
    def __init__(self, app):
        self.app = app

        self.home_path = str(Path.home())

    def popup_init(self):
        self.usc_popup = QMessageBox()  # create a popup window that notifies the user that we have unsaved changes
        self.usc_popup.setWindowTitle("Unsaved Changes!")  # usc means unsaved changes
        self.usc_popup.setText("The file you are trying to close has unsaved changes.")
        self.usc_popup.setStandardButtons(
            QMessageBox.StandardButton.Save |
            QMessageBox.StandardButton.Discard |
            QMessageBox.StandardButton.Cancel
        )

    def unsaved_changes_popup(self):
        button = self.usc_popup.exec()

        match button:
            case QMessageBox.StandardButton.Save:
                return "save"
            case QMessageBox.StandardButton.Discard:
                return "discard"
            case QMessageBox.StandardButton.Cancel:
                return "cancel"

    def bstring_to_oz(self, data):  # convert binary data to a string of ones and zeros (oz)
        oz_bytes = []

        for byte in data:
            oz_bytes.append(format(byte, "08b"))

        oz_string = " ".join(oz_bytes)

        return oz_string

    def oz_string_to_bstring(self, oz_string):  # convert a string of zeroes and ones to a binary string
        oz_bytes = oz_string.split()

        bytes_int = []

        for byte in oz_bytes:
            bytes_int.append(int(byte, 2))

        binary_string = bytes(bytes_int)

        return binary_string

    def on_close(self, event):
        changes = False

        for file_path in self.app.open_files:
            file = self.app.open_files[file_path]

            if file.bit_editor.not_saved:
                changes = True
                break

        if changes:
            save_or_not = self.unsaved_changes_popup()

            match save_or_not:
                case "save":
                    self.app.file_actions.save_all_files()
                    self.close()

                case "cancel":
                    event.ignore()

                case "discard":
                    self.close()

        else:
            self.close()

    def close(self):
        print("Bye!")

        self.app.settings.save()

    def update_font_in_all_bit_editors(self):
        self.app.settings.square_bits = self.app.gui.main_window.bitsAreSquaresSetting.isChecked()

        for file_path in self.app.open_files:
            editor = self.app.open_files[file_path].bit_editor

            square = self.app.gui.main_window.bitsAreSquaresSetting.isChecked()

            spacing = 200 if square else 100  # add spacing when setting is checked

            editor.font.setLetterSpacing(QFont.SpacingType.PercentageSpacing, spacing)
            editor.input.setFont(editor.font)

    def open_last_file(self):
        if len(sys.argv) == 1:  # if no parameters were passed to the editor
            file_path = self.app.settings.last_opened_file

            file = self.app.file.File(self.app, file_path, file_path.split("/")[-1])
            self.app.open_files[file_path] = file