# -*- coding: utf-8 -*-
# *****************************************************************************
#       Copyright (C) 2003-2006 Gary Bishop.
#       Copyright (C) 2006-2020 Jorgen Stenarson. <jorgen.stenarson@bostream.nu>
#       Copyright (C) 2020 Bassem Girgis. <brgirgis@gmail.com>
#
#  Distributed under the terms of the BSD License.  The full license is in
#  the file COPYING, distributed as part of this software.
# *****************************************************************************


import System

from .common import KeyPress, make_KeyPress_from_keydescr, validkey

c32 = System.ConsoleKey
Shift = System.ConsoleModifiers.Shift
Control = System.ConsoleModifiers.Control
Alt = System.ConsoleModifiers.Alt
# table for translating virtual keys to X windows key symbols
code2sym_map = {
    # c32.CANCEL:    'Cancel',
    c32.Backspace: "BackSpace",
    c32.Tab: "Tab",
    c32.Clear: "Clear",
    c32.Enter: "Return",
    # c32.Shift:     'Shift_L',
    # c32.Control:   'Control_L',
    # c32.Menu:      'Alt_L',
    c32.Pause: "Pause",
    # c32.Capital:   'Caps_Lock',
    c32.Escape: "Escape",
    # c32.Space:     'space',
    c32.PageUp: "Prior",
    c32.PageDown: "Next",
    c32.End: "End",
    c32.Home: "Home",
    c32.LeftArrow: "Left",
    c32.UpArrow: "Up",
    c32.RightArrow: "Right",
    c32.DownArrow: "Down",
    c32.Select: "Select",
    c32.Print: "Print",
    c32.Execute: "Execute",
    # c32.Snapshot:  'Snapshot',
    c32.Insert: "Insert",
    c32.Delete: "Delete",
    c32.Help: "Help",
    c32.F1: "F1",
    c32.F2: "F2",
    c32.F3: "F3",
    c32.F4: "F4",
    c32.F5: "F5",
    c32.F6: "F6",
    c32.F7: "F7",
    c32.F8: "F8",
    c32.F9: "F9",
    c32.F10: "F10",
    c32.F11: "F11",
    c32.F12: "F12",
    c32.F13: "F13",
    c32.F14: "F14",
    c32.F15: "F15",
    c32.F16: "F16",
    c32.F17: "F17",
    c32.F18: "F18",
    c32.F19: "F19",
    c32.F20: "F20",
    c32.F21: "F21",
    c32.F22: "F22",
    c32.F23: "F23",
    c32.F24: "F24",
    # c32.Numlock:    'Num_Lock,',
    # c32.Scroll:     'Scroll_Lock',
    # c32.Apps:       'VK_APPS',
    # c32.ProcesskeY: 'VK_PROCESSKEY',
    # c32.Attn:       'VK_ATTN',
    # c32.Crsel:      'VK_CRSEL',
    # c32.Exsel:      'VK_EXSEL',
    # c32.Ereof:      'VK_EREOF',
    # c32.Play:       'VK_PLAY',
    # c32.Zoom:       'VK_ZOOM',
    # c32.Noname:     'VK_NONAME',
    # c32.Pa1:        'VK_PA1',
    c32.OemClear: "VK_OEM_CLEAR",
    c32.NumPad0: "NUMPAD0",
    c32.NumPad1: "NUMPAD1",
    c32.NumPad2: "NUMPAD2",
    c32.NumPad3: "NUMPAD3",
    c32.NumPad4: "NUMPAD4",
    c32.NumPad5: "NUMPAD5",
    c32.NumPad6: "NUMPAD6",
    c32.NumPad7: "NUMPAD7",
    c32.NumPad8: "NUMPAD8",
    c32.NumPad9: "NUMPAD9",
    c32.Divide: "Divide",
    c32.Multiply: "Multiply",
    c32.Add: "Add",
    c32.Subtract: "Subtract",
    c32.Decimal: "VK_DECIMAL",
}

# function to handle the mapping


def make_keysym(keycode):
    try:
        sym = code2sym_map[keycode]
    except KeyError:
        sym = ""
    return sym


sym2code_map = {}
for code, sym in code2sym_map.items():
    sym2code_map[sym.lower()] = code


def key_text_to_keyinfo(keytext):
    """Convert a GNU readline style textual description of a key to keycode with modifiers"""
    if keytext.startswith('"'):  # "
        return keyseq_to_keyinfo(keytext[1:-1])
    else:
        return keyname_to_keyinfo(keytext)


def char_to_keyinfo(char, control=False, meta=False, shift=False):
    vk = ord(char)
    if vk & 0xFFFF == 0xFFFF:
        print('VkKeyScan("%s") = %x' % (char, vk))
        raise ValueError("bad key")
    if vk & 0x100:
        shift = True
    if vk & 0x200:
        control = True
    if vk & 0x400:
        meta = True
    return (control, meta, shift, vk & 0xFF)


def keyname_to_keyinfo(keyname):
    control = False
    meta = False
    shift = False

    while True:
        lkeyname = keyname.lower()
        if lkeyname.startswith("control-"):
            control = True
            keyname = keyname[8:]
        elif lkeyname.startswith("ctrl-"):
            control = True
            keyname = keyname[5:]
        elif lkeyname.startswith("meta-"):
            meta = True
            keyname = keyname[5:]
        elif lkeyname.startswith("alt-"):
            meta = True
            keyname = keyname[4:]
        elif lkeyname.startswith("shift-"):
            shift = True
            keyname = keyname[6:]
        else:
            if len(keyname) > 1:
                return (control, meta, shift, sym2code_map.get(keyname.lower(), " "))
            else:
                return char_to_keyinfo(keyname, control, meta, shift)


def keyseq_to_keyinfo(keyseq):
    res = []
    control = False
    meta = False
    shift = False

    while True:
        if keyseq.startswith("\\C-"):
            control = True
            keyseq = keyseq[3:]
        elif keyseq.startswith("\\M-"):
            meta = True
            keyseq = keyseq[3:]
        elif keyseq.startswith("\\e"):
            res.append(char_to_keyinfo("\033", control, meta, shift))
            control = meta = shift = False
            keyseq = keyseq[2:]
        elif len(keyseq) >= 1:
            res.append(char_to_keyinfo(keyseq[0], control, meta, shift))
            control = meta = shift = False
            keyseq = keyseq[1:]
        else:
            return res[0]


def make_keyinfo(keycode, state):
    control = False
    meta = False
    shift = False
    return (control, meta, shift, keycode)


def make_KeyPress(char, state, keycode):

    shift = bool(int(state) & int(Shift))
    control = bool(int(state) & int(Control))
    meta = bool(int(state) & int(Alt))
    keyname = code2sym_map.get(keycode, "").lower()
    if control and meta:  # equivalent to altgr so clear flags
        control = False
        meta = False
    elif control:
        char = str(keycode)
    return KeyPress(char, shift, control, meta, keyname)