#!/usr/bin/env python3
# -*- encoding: utf-8 -*-

import traceback
from io import BytesIO
from pathlib import Path
from typing import Optional

from PIL import Image

from .system.downloader.downloadedData import MainApp

millisamount = 10

AnyInt = Optional[int]


def updateImage(tk: MainApp, old_url_modified: AnyInt, old_file_modified: AnyInt, old_file_sz: AnyInt):
    try:
        path_file = Path('latest_put_image.file')
        path_url = Path('latest_put_image.url')
        new_url_modified = None
        new_file_modified = None
        new_file_sz = None
        try:
            st = path_url.stat()
            new_url_modified = st.st_mtime_ns
        except BaseException:
            pass
        try:
            st = path_file.stat()
            new_file_modified = st.st_mtime_ns
            new_file_sz = st.st_size
        except BaseException:
            pass
        tk.after(millisamount, updateImage, tk,
                 new_url_modified, new_file_modified, new_file_sz)
        if old_url_modified != new_url_modified or old_file_modified != new_file_modified or old_file_sz != new_file_sz:
            url = None
            bts = None
            try:
                url = path_url.read_text()
                bts = path_file.read_bytes()
            except BaseException:
                pass
            if url is not None and bts is not None:
                try:
                    tk.update_image(Image.open(BytesIO(bts)), url)
                except BaseException:
                    print()
                    print("Exception on link %r" % url)
                    traceback.print_exc()
        if ((old_url_modified is not None or old_file_modified is not None) and (new_url_modified is None and new_file_modified is None)):
            tk.destroy()
    except BaseException:
        print()
        traceback.print_exc()
        tk.destroy()


def main():
    tk = MainApp()
    tk.after(1, updateImage, tk, None, None, None)
    tk.mainloop()


if __name__ == '__main__':
    main()