"""About Dialog for IDLE

"""
import os
import sys
from platform import python_version, architecture

from tkinter import Toplevel, Frame, Label, Button, PhotoImage
from tkinter import SUNKEN, TOP, BOTTOM, LEFT, X, BOTH, W, EW, NSEW, E

from idlelib import textview


def build_bits():
 "Return bits for platform."
 if sys.platform == 'darwin':
 return '64' if sys.maxsize > 2**32 else '32'
 else:
 return architecture()[0][:2]


class AboutDialog(Toplevel):
 """Modal about dialog for idle

 """
 def __init__(self, parent, title=None, *, _htest=False, _utest=False):
 """Create popup, do not return until tk widget destroyed.

 parent - parent of this dialog
 title - string which is title of popup dialog
 _htest - bool, change box location when running htest
 _utest - bool, don't wait_window when running unittest
 """
 Toplevel.__init__(self, parent)
 self.configure(borderwidth=5)
 # place dialog below parent if running htest
 self.geometry("+%d+%d" % (
 parent.winfo_rootx()+30,
 parent.winfo_rooty()+(30 if not _htest else 100)))
 self.bg = "#bbbbbb"
 self.fg = "#000000"
 self.create_widgets()
 self.resizable(height=False, width=False)
 self.title(title or
 f'About IDLE {python_version()} ({build_bits()} bit)')
 self.transient(parent)
 self.grab_set()
 self.protocol("WM_DELETE_WINDOW", self.ok)
 self.parent = parent
 self.button_ok.focus_set()
 self.bind('<Return>', self.ok) # dismiss dialog
 self.bind('<Escape>', self.ok) # dismiss dialog
 self._current_textview = None
 self._utest = _utest

 if not _utest:
 self.deiconify()
 self.wait_window()

 def create_widgets(self):
 frame = Frame(self, borderwidth=2, relief=SUNKEN)
 frame_buttons = Frame(self)
 frame_buttons.pack(side=BOTTOM, fill=X)
 frame.pack(side=TOP, expand=True, fill=BOTH)
 self.button_ok = Button(frame_buttons, text='Close',
 command=self.ok)
 self.button_ok.pack(padx=5, pady=5)

 frame_background = Frame(frame, bg=self.bg)
 frame_background.pack(expand=True, fill=BOTH)

 header = Label(frame_background, text='IDLE', fg=self.fg,
 bg=self.bg, font=('courier', 24, 'bold'))
 header.grid(row=0, column=0, sticky=E, padx=10, pady=10)

 tk_patchlevel = self.tk.call('info', 'patchlevel')
 ext = '.png' if tk_patchlevel >= '8.6' else '.gif'
 icon = os.path.join(os.path.abspath(os.path.dirname(__file__)),
 'Icons', f'idle_48{ext}')
 self.icon_image = PhotoImage(master=self._root(), file=icon)
 logo = Label(frame_background, image=self.icon_image, bg=self.bg)
 logo.grid(row=0, column=0, sticky=W, rowspan=2, padx=10, pady=10)

 byline_text = "Python's Integrated Development\nand Learning Environment" + 5*'\n'
 byline = Label(frame_background, text=byline_text, justify=LEFT,
 fg=self.fg, bg=self.bg)
 byline.grid(row=2, column=0, sticky=W, columnspan=3, padx=10, pady=5)
 email = Label(frame_background, text='email: idle-dev@python.org',
 justify=LEFT, fg=self.fg, bg=self.bg)
 email.grid(row=6, column=0, columnspan=2, sticky=W, padx=10, pady=0)
 docs = Label(frame_background, text='https://docs.python.org/' +
 python_version()[:3] + '/library/idle.html',
 justify=LEFT, fg=self.fg, bg=self.bg)
 docs.grid(row=7, column=0, columnspan=2, sticky=W, padx=10, pady=0)

 Frame(frame_background, borderwidth=1, relief=SUNKEN,
 height=2, bg=self.bg).grid(row=8, column=0, sticky=EW,
 columnspan=3, padx=5, pady=5)

 pyver = Label(frame_background,
 text='Python version: ' + python_version(),
 fg=self.fg, bg=self.bg)
 pyver.grid(row=9, column=0, sticky=W, padx=10, pady=0)
 tkver = Label(frame_background, text='Tk version: ' + tk_patchlevel,
 fg=self.fg, bg=self.bg)
 tkver.grid(row=9, column=1, sticky=W, padx=2, pady=0)
 py_buttons = Frame(frame_background, bg=self.bg)
 py_buttons.grid(row=10, column=0, columnspan=2, sticky=NSEW)
 self.py_license = Button(py_buttons, text='License', width=8,
 highlightbackground=self.bg,
 command=self.show_py_license)
 self.py_license.pack(side=LEFT, padx=10, pady=10)
 self.py_copyright = Button(py_buttons, text='Copyright', width=8,
 highlightbackground=self.bg,
 command=self.show_py_copyright)
 self.py_copyright.pack(side=LEFT, padx=10, pady=10)
 self.py_credits = Button(py_buttons, text='Credits', width=8,
 highlightbackground=self.bg,
 command=self.show_py_credits)
 self.py_credits.pack(side=LEFT, padx=10, pady=10)

 Frame(frame_background, borderwidth=1, relief=SUNKEN,
 height=2, bg=self.bg).grid(row=11, column=0, sticky=EW,
 columnspan=3, padx=5, pady=5)

 idlever = Label(frame_background,
 text='IDLE version: ' + python_version(),
 fg=self.fg, bg=self.bg)
 idlever.grid(row=12, column=0, sticky=W, padx=10, pady=0)
 idle_buttons = Frame(frame_background, bg=self.bg)
 idle_buttons.grid(row=13, column=0, columnspan=3, sticky=NSEW)
 self.readme = Button(idle_buttons, text='README', width=8,
 highlightbackground=self.bg,
 command=self.show_readme)
 self.readme.pack(side=LEFT, padx=10, pady=10)
 self.idle_news = Button(idle_buttons, text='NEWS', width=8,
 highlightbackground=self.bg,
 command=self.show_idle_news)
 self.idle_news.pack(side=LEFT, padx=10, pady=10)
 self.idle_credits = Button(idle_buttons, text='Credits', width=8,
 highlightbackground=self.bg,
 command=self.show_idle_credits)
 self.idle_credits.pack(side=LEFT, padx=10, pady=10)

 # License, copyright, and credits are of type _sitebuiltins._Printer
 def show_py_license(self):
 "Handle License button event."
 self.display_printer_text('About - License', license)

 def show_py_copyright(self):
 "Handle Copyright button event."
 self.display_printer_text('About - Copyright', copyright)

 def show_py_credits(self):
 "Handle Python Credits button event."
 self.display_printer_text('About - Python Credits', credits)

 # Encode CREDITS.txt to utf-8 for proper version of Loewis.
 # Specify others as ascii until need utf-8, so catch errors.
 def show_idle_credits(self):
 "Handle Idle Credits button event."
 self.display_file_text('About - Credits', 'CREDITS.txt', 'utf-8')

 def show_readme(self):
 "Handle Readme button event."
 self.display_file_text('About - Readme', 'README.txt', 'ascii')

 def show_idle_news(self):
 "Handle News button event."
 self.display_file_text('About - NEWS', 'NEWS.txt', 'utf-8')

 def display_printer_text(self, title, printer):
 """Create textview for built-in constants.

 Built-in constants have type _sitebuiltins._Printer. The
 text is extracted from the built-in and then sent to a text
 viewer with self as the parent and title as the title of
 the popup.
 """
 printer._Printer__setup()
 text = '\n'.join(printer._Printer__lines)
 self._current_textview = textview.view_text(
 self, title, text, _utest=self._utest)

 def display_file_text(self, title, filename, encoding=None):
 """Create textview for filename.

 The filename needs to be in the current directory. The path
 is sent to a text viewer with self as the parent, title as
 the title of the popup, and the file encoding.
 """
 fn = os.path.join(os.path.abspath(os.path.dirname(__file__)), filename)
 self._current_textview = textview.view_file(
 self, title, fn, encoding, _utest=self._utest)

 def ok(self, event=None):
 "Dismiss help_about dialog."
 self.grab_release()
 self.destroy()


if __name__ == '__main__':
 from unittest import main
 main('idlelib.idle_test.test_help_about', verbosity=2, exit=False)

 from idlelib.idle_test.htest import run
 run(AboutDialog)