#!/usr/bin/python3
import os.path

from PyQt6.QtWidgets import QFileDialog, QTabWidget
from editor import BitEditor

MAX_FILE_SIZE = 262144  # 2^18


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

    def open_files(self):
        dialog = QFileDialog(self.app.gui.QTMainWindow)
        dialog.setWindowTitle("Open File")
        dialog.setDirectory(self.app.utils.home_path)
        dialog.setFileMode(QFileDialog.FileMode.ExistingFiles)
        dialog.setNameFilters(["Binary (*.bin)", "Any (*)"])
        dialog.setViewMode(QFileDialog.ViewMode.List)

        if dialog.exec():
            for file_path in dialog.selectedFiles():
                if not file_path in self.app.open_files:  # dont open file twice
                    if os.path.getsize(file_path) > MAX_FILE_SIZE:
                        self.app.utils.ftb_popup.exec()
                        return

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

    def create_file(self, content: bin=b""):
        file_path, extension = QFileDialog.getSaveFileName(
            caption="New File",
            directory=self.app.utils.home_path,
            filter="Binary (*.bin);;Any (*)",
        )

        if file_path == "":
            return

        if "Binary" in extension:
            file_path = file_path.split(".")[0] + ".bin"  # make sure it has the right extension

        file = open(file_path, "bw")  # create new empty file
        file.write(content)
        file.close()

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

    def save_current_file(self):
        current_tab = self.app.gui.main_window.openFileTabs.currentWidget()
        current_file_path = current_tab.objectName()

        self.app.open_files[current_file_path].save()

    def save_current_file_as(self):
        current_tab = self.app.gui.main_window.openFileTabs.currentWidget()  # get currently open file
        current_file_path = current_tab.objectName()
        file = self.app.open_files[current_file_path]

        oz_content = file.bit_editor.input.toPlainText()  # convert user input to binary data
        file_content = self.app.utils.oz_string_to_bstring(oz_content)

        self.create_file(file_content)

    def close_current_file(self):
        current_file_path = self.app.gui.main_window.openFileTabs.currentWidget().objectName()

        if self.app.open_files[current_file_path].bit_editor.not_saved:
            save_or_not = self.app.utils.unsaved_changes_popup()

            match save_or_not:
                case "save":
                    self.app.open_files[current_file_path].save()

                case "cancel":
                    return

        self.app.open_files[current_file_path].close()

    def save_all_files(self):
        for file_path in self.app.open_files:
            self.app.open_files[file_path].save()


class File:
    def __init__(self, app, path, name):
        self.app = app

        self.path = path
        self.name = name

        file = open(path, "rb")
        file_content = file.read()
        file.close()

        self.content = file_content

        self.bit_editor = BitEditor(self.app, self)

        self.app.settings.last_opened_file = self.path

        self.app.gui.main_window.openFileTabs.setCurrentIndex(self.app.gui.main_window.openFileTabs.count() - 1)

    def close(self):
        self.app.gui.main_window.openFileTabs.removeTab(self.bit_editor.tab_index)
        del self.app.open_files[self.path]

    def save(self):
        oz_string = self.bit_editor.input.toPlainText()
        data = self.app.utils.oz_string_to_bstring(oz_string)

        file = open(self.path, "wb")
        file.write(data)
        file.close()

        self.app.open_files[self.path].bit_editor.not_saved = False