# -*- coding: utf-8 -*-
# vim:set et sts=4 sw=4:
#
# ibus-anthy - The Anthy engine for IBus
#
# Copyright (c) 2007-2008 Peng Huang <shawn.p.huang@gmail.com>
# Copyright (c) 2009 Hideaki ABE <abe.sendai@gmail.com>
# Copyright (c) 2010-2017 Takao Fujiwara <takao.fujiwara1@gmail.com>
# Copyright (c) 2007-2017 Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

__all__ = (
        'ThumbShiftKeyboard',
        'ThumbShiftSegment',
    )

import sys

from gi import require_version as gi_require_version
gi_require_version('GLib', '2.0')
gi_require_version('IBus', '1.0')

from gi.repository import GLib
from gi.repository import IBus

import segment

_THUMB_BASIC_METHOD = 'base'

_table_static = {
    'q': [u'。', u'',   u'ぁ'],
    'w': [u'か', u'が', u'え'],
    'e': [u'た', u'だ', u'り'],
    'r': [u'こ', u'ご', u'ゃ'],
    't': [u'さ', u'ざ', u'れ'],

    'y': [u'ら', u'よ', u'ぱ'],
    'u': [u'ち', u'に', u'ぢ'],
    'i': [u'く', u'る', u'ぐ'],
    'o': [u'つ', u'ま', u'づ'],
    'p': [u'，',  u'ぇ', u'ぴ'],
    '@': [u'、', u'',   u''],
    '[': [u'゛', u'゜', u''],

    'a': [u'う', u'',   u'を'],
    's': [u'し', u'じ', u'あ'],
    'd': [u'て', u'で', u'な'],
    'f': [u'け', u'げ', u'ゅ'],
    'g': [u'せ', u'ぜ', u'も'],

    'h': [u'は', u'み', u'ば'],
    'j': [u'と', u'お', u'ど'],
    'k': [u'き', u'の', u'ぎ'],
    'l': [u'い', u'ょ', u'ぽ'],
    ';': [u'ん', u'っ', u''],

    'z': [u'．',  u'',   u'ぅ'],
    'x': [u'ひ', u'び', u'ー'],
    'c': [u'す', u'ず', u'ろ'],
    'v': [u'ふ', u'ぶ', u'や'],
    'b': [u'へ', u'べ', u'ぃ'],

    'n': [u'め', u'ぬ', u'ぷ'],
    'm': [u'そ', u'ゆ', u'ぞ'],
    ',': [u'ね', u'む', u'ぺ'],
    '.': [u'ほ', u'わ', u'ぼ'],
    '/': [u'・', u'ぉ', u''],

    '1': [u'1',  u'',   u'？'],
    '2': [u'2',  u'',   u'／'],
    '4': [u'4',  u'',   u'「'],
    '5': [u'5',  u'',   u'」'],

    '6': [u'6',  u'［',  u''],
    '7': [u'7',  u'］',  u''],
    '8': [u'8',  u'（',  u''],
    '9': [u'9',  u'）',  u''],
    '\\': [u'￥', u'',  u''],
}

_nicola_j_table_static = {
    ':': [u'：', u'',   u''],
    '@': [u'、', u'',   u''],
    '[': [u'゛', u'゜', u''],
    ']': [u'」', u'',   u''],
    '8': [u'8',  u'（', u''],
    '9': [u'9',  u'）', u''],
    '0': [u'0',  u'',   u''],
}

_nicola_a_table_static = {
    ':': [u'：', u'',   u''],
    '@': [u'＠', u'',   u''],
    '[': [u'、', u'',   u''],
    ']': [u'゛', u'゜', u''],
    '8': [u'8',  u'',   u''],
    '9': [u'9',  u'（', u''],
    '0': [u'0',  u'）', u''],
}

_nicola_f_table_static = {
    ':': [u'、', u'',   u''],
    '@': [u'＠', u'',   u''],
    '[': [u'゛', u'゜', u''],
    ']': [u'」', u'',   u''],
    '8': [u'8',  u'（', u''],
    '9': [u'9',  u'）', u''],
    '0': [u'0',  u'',   u''],
}

_kb231_j_fmv_table_static = {
    '3': [u'3',  u'',   u'～'],
    '0': [u'0',  u'『', u''],
    '-': [u'-',  u'』', u''],
    '=': [u'=',  u'',   u''],
}

_kb231_a_fmv_table_static = {
    '3': [u'3',  u'',   u'～'],
    '0': [u'0',  u'）', u''],
    '-': [u'-',  u'『', u''],
    '=': [u'=',  u'』', u''],
}

_kb231_f_fmv_table_static = {
    '3': [u'3',  u'',   u'～'],
    '0': [u'0',  u'『', u''],
    '-': [u'-',  u'』', u''],
    '=': [u'=',  u'',   u''],
}

_kb611_j_fmv_table_static = {
    '`':  [u'‘', u'',   u''],
    '^':  [u'々', u'£',  u''],
    ':':  [u'：', u'',   u''],
    '@':  [u'、', u'¢',  u''],
    '[':  [u'゛', u'゜', u''],
    # keysyms are same and keycodes depend on the platforms.
    #'￥': [u'￥', u'¬',  u''],
    '\\': [u'￥', u'¦',  u''],
}

_kb611_a_fmv_table_static = {
    '`':  [u'々', u'',   u'£'],
    ':':  [u'：', u'',   u''],
    '@':  [u'＠', u'',   u''],
    '[':  [u'、', u'¢',  u''],
    #'￥': [u'￥', u'¬',  u''],
    '\\': [u'￥', u'¦',  u''],
}

_kb611_f_fmv_table_static = {
    '`':  [u'‘', u'',   u''],
    '^':  [u'々', u'£',  u''],
    ':':  [u'、', u'¢',  u''],
    '@':  [u'＠', u'',   u''],
    '[':  [u'゛', u'゜', u''],
    #'￥': [u'￥', u'¬',  u''],
    '\\': [u'￥', u'¦',  u''],
}

_shift_table = {
    'H': u'ぱ',
    'X': u'ぴ',
    'V': u'ぷ',
    'B': u'ぺ',
    '>': u'ぽ',
}

table_static = {}
r_table_static = {}

for k in _table_static.keys():
    table_static[ord(k)] = _table_static[k]
    for c in _table_static[k]:
        r_table_static[c] = k

kana_voiced_consonant_rule = {
    u'か゛' : u'が',
    u'き゛' : u'ぎ',
    u'く゛' : u'ぐ',
    u'け゛' : u'げ',
    u'こ゛' : u'ご',
    u'さ゛' : u'ざ',
    u'し゛' : u'じ',
    u'す゛' : u'ず',
    u'せ゛' : u'ぜ',
    u'そ゛' : u'ぞ',
    u'た゛' : u'だ',
    u'ち゛' : u'ぢ',
    u'つ゛' : u'づ',
    u'て゛' : u'で',
    u'と゛' : u'ど',
    u'は゛' : u'ば',
    u'ひ゛' : u'び',
    u'ふ゛' : u'ぶ',
    u'へ゛' : u'べ',
    u'ほ゛' : u'ぼ',
    u'は゜' : u'ぱ',
    u'ひ゜' : u'ぴ',
    u'ふ゜' : u'ぷ',
    u'へ゜' : u'ぺ',
    u'ほ゜' : u'ぽ',
}

_UNFINISHED_HIRAGANA = set(u'かきくけこさしすせそたちつてとはひふへほ')

class ThumbShiftKeyboard:
    def __init__(self, prefs=None):
        self.__prefs = prefs
        self.__table = table_static
        self.__r_table = r_table_static
        self.__shift_table = {}
        self.__ls = 0
        self.__rs = 0
        self.__t1 = 0
        self.__t2 = 0
        self.__layout = 0
        self.__fmv_extension = 2
        self.__handakuten = False
        self.__thumb_typing_rule_method = None
        self.__init_thumb_typing_rule()
        self.__init_layout_table()
        if self.__prefs != None:
            self.reset()
            self.__reset_shift_table(False)

    def __init_thumb_typing_rule(self):
        prefs = self.__prefs
        if prefs == None:
            self.__thumb_typing_rule_method = None
            return
        method = prefs.get_value('thumb-typing-rule', 'method')
        if method == None:
            method = _THUMB_BASIC_METHOD
        self.__thumb_typing_rule_method = method
        keymap = prefs.get_value('thumb-typing-rule', 'list')
        if self.__thumb_typing_rule_method not in keymap.keys():
            self.__thumb_typing_rule_method = None

    def __init_layout_table(self):
        if self.__table != {}:
            self.__table.clear()
        if self.__r_table != {}:
            self.__r_table.clear()
        method = self.__thumb_typing_rule_method
        if method != None:
            prefs = self.__prefs
            keymap = prefs.get_value('thumb-typing-rule', 'list')[method]
            for k in keymap.keys():
                value = keymap.get(k)
                ch = prefs.typing_from_config_key(k)
                if ch == '':
                    continue
                self.__set_bus_table(ch, value)
        else:
            for k in _table.keys():
                self.__table[ord(k)] = _table_static[k]
                for c in _table_static[k]:
                    self.__r_table[c] = k

    def __set_bus_table(self, key, value):
        prefs = self.__prefs
        if value == None or len(value) != 3:
            return
        value = [prefs.unicode(prefs.str(value[0])),
                 prefs.unicode(prefs.str(value[1])),
                 prefs.unicode(prefs.str(value[2]))]
        if value[0] == u'' and \
                value[1] == u'' and value[2] == u'':
            return
        self.__table[ord(key)] = value
        for c in value:
            self.__r_table[c] = key

    def __reset_layout_table(self, init,
                             j_table_label, j_table,
                             a_table_label, a_table,
                             f_table_label, f_table):
        if init:
            self.__init_layout_table()
        method = None
        sub_table = None
        if self.__layout == 0:
            method = j_table_label
            sub_table = j_table
        elif self.__layout == 1:
            method = a_table_label
            sub_table = a_table
        elif self.__layout == 2:
            method = f_table_label
            sub_table = f_table
        if method == None or sub_table == None:
            return
        method = self.__thumb_typing_rule_method
        if method != None:
            prefs = self.__prefs
            keymap = prefs.get_value('thumb-typing-rule', 'list')[method]
            for k in keymap.keys():
                value = keymap.get(k)
                ch = prefs.typing_from_config_key(k)
                if ch == '':
                    continue
                self.__set_bus_table(ch, value)
        else:
            for k in sub_table.keys():
                self.__table[ord(unicode(k))] = sub_table[k]
                for c in sub_table[k]:
                    self.__r_table[c] = k

    def __reset_extension_table(self, init):
        self.__reset_layout_table(init,
                                  'nicola_j_table',
                                  _nicola_j_table_static,
                                  'nicola_a_table',
                                  _nicola_a_table_static,
                                  'nicola_f_table',
                                  _nicola_f_table_static)
        if self.__fmv_extension == 0:
            return
        if self.__fmv_extension >= 1:
            self.__reset_layout_table(False,
                                      'kb231_j_fmv_table',
                                      _kb231_j_fmv_table_static,
                                      'kb231_a_fmv_table',
                                      _kb231_a_fmv_table_static,
                                      'kb231_f_fmv_table',
                                      _kb231_f_fmv_table_static)
        if self.__fmv_extension >= 2:
            self.__reset_layout_table(False,
                                      'kb611_j_fmv_table',
                                      _kb611_j_fmv_table_static,
                                      'kb611_a_fmv_table',
                                      _kb611_a_fmv_table_static,
                                      'kb611_f_fmv_table',
                                      _kb611_f_fmv_table_static)

    def __reset_shift_table(self, init):
        self.__reset_extension_table(init)
        if self.__handakuten:
            for k in _shift_table.keys():
                self.__shift_table[ord(k)] = _shift_table[k]
                self.__r_table[_shift_table[k]] = k
        elif self.__shift_table != {}:
            for k in _shift_table.keys():
                if ord(k) in self.__shift_table:
                    del self.__shift_table[ord(k)]
                if _shift_table[k] in self.__r_table:
                    del self.__r_table[_shift_table[k]]

    def __s_to_key_raw(self, s):
        keyval = IBus.keyval_from_name(s.split('+')[-1])
        s = s.lower()
        state = ('shift+' in s and IBus.ModifierType.SHIFT_MASK or 0) | (
                 'ctrl+' in s and IBus.ModifierType.CONTROL_MASK or 0) | (
                 'alt+' in s and IBus.ModifierType.MOD1_MASK or 0)
        return (keyval, state)

    def __get_xkb_layout(self):
        # Until Gdk.property_get is fixed
        '''
        # Move importing Gdk into ThumbShiftKeyboard from the header
        # because ibus-engine-anthy --xml does not requre to open X.
        try:
            from gi.repository import Gdk
            get_default_root_window = Gdk.get_default_root_window
            property_get = Gdk.property_get
            intern = Gdk.Atom.intern
        except ImportError:
            get_default_root_window = lambda : None
            property_get = lambda : None
            intern = lambda : None
        except RuntimeError:
            # Do we support the engine without display?
            print >> sys.stderr, "Gdk couldn't be initialized"
            print >> sys.stderr, 'Could not open display'
            get_default_root_window = lambda : None
            property_get = lambda : None
            intern = lambda : None

        root_window = get_default_root_window()
        if not root_window:
            return 0
        xkb_rules_names = intern('_XKB_RULES_NAMES', False)
        xa_string = intern('STRING', False)
        try:
            prop = property_get(root_window,
                                xkb_rules_names, xa_string,
                                0, 1024, 0)[3]
            layout_list = prop.split('\0')
        except TypeError:
            print >> sys.stderr, \
              'This problem is fixed in the latest gobject-introspection'
            print >> sys.stderr, \
              'https://bugzilla.gnome.org/show_bug.cgi?id=670509'
            return 0
        layout = 0
        for data in layout_list:
            if data == 'jp':
                layout = 0
            elif data == 'us':
                layout = 1
            elif data.find('japan:nicola_f_bs') >= 0:
                layout = 2
            elif data.find('japan:') >= 0:
                layout = 0
        return layout
        '''

        layout = 0
        argv = ['setxkbmap', '-query']
        (ret, std_out, std_error, exit_status) = \
                GLib.spawn_sync(None, argv, None,
                                GLib.SpawnFlags.SEARCH_PATH_FROM_ENVP,
                                None, None)
        if not ret:
            print >> sys.stderr, std_error
            return layout
        for line in std_out.split('\n'):
            if line.startswith('layout:'):
                data = line.split()[1]
                if data == 'jp':
                    layout = 0
                elif data == 'us':
                    layout = 1
            elif line.startswith('options:'):
                data = line.split()[1]
                if data.find('japan:nicola_f_bs') >= 0:
                    layout = 2
                elif data.find('japan:') >= 0:
                    layout = 0
        return layout

    def __reset_layout_and_handakuten(self):
        mode = self.__prefs.get_value('thumb', 'keyboard-layout-mode')
        layout = 0
        if mode == 1:
            layout = self.__get_xkb_layout()
        else:
            layout = self.__prefs.get_value('thumb', 'keyboard-layout')
        self.set_layout(layout)

        fmv_extension = self.__prefs.get_value('thumb', 'fmv-extension')
        self.set_fmv_extension(fmv_extension)
        handakuten = self.__prefs.get_value('thumb', 'handakuten')
        self.set_handakuten(handakuten)

    def reset(self):
        s = self.__prefs.get_value('thumb', 'ls')
        ls, state = self.__s_to_key_raw(s)
        if ls == 0xffffff:
            ls = IBus.KEY_Muhenkan
        self.set_ls(ls)

        s = self.__prefs.get_value('thumb', 'rs')
        rs, state = self.__s_to_key_raw(s)
        if rs == 0xffffff:
            rs = IBus.KEY_Henkan
        self.set_rs(rs)

        t1 = self.__prefs.get_value('thumb', 't1')
        t2 = self.__prefs.get_value('thumb', 't2')
        self.set_t1(t1)
        self.set_t2(t2)

        GLib.idle_add(self.__reset_layout_and_handakuten,
                      priority = GLib.PRIORITY_LOW)

    def get_ls(self):
        return self.__ls

    def set_ls(self, ls):
        self.__ls = ls

    def get_rs(self):
        return self.__rs

    def set_rs(self, rs):
        self.__rs = rs

    def get_t1(self):
        return self.__t1

    def set_t1(self, t1):
        self.__t1 = t1

    def get_t2(self):
        return self.__t2

    def set_t2(self, t2):
        self.__t2 = t2

    def get_layout(self):
        return self.__layout

    def set_layout(self, layout):
        if self.__layout == layout:
            return
        self.__layout = layout
        self.__reset_shift_table(True)

    def get_fmv_extension (self):
        return self.__fmv_extension

    def set_fmv_extension (self, fmv_extension):
        if self.__fmv_extension == fmv_extension:
            return
        self.__fmv_extension = fmv_extension
        self.__reset_shift_table(True)

    def get_handakuten(self):
        return self.__handakuten

    def set_handakuten(self, handakuten):
        if self.__handakuten == handakuten:
            return
        self.__handakuten = handakuten
        self.__reset_shift_table(True)

    def get_char(self, key, fallback=None):
        return self.__table.get(key, fallback)

    def get_chars(self):
        return self.__table.keys()

    def get_r_char(self, key, fallback=None):
        return self.__r_table.get(key, fallback)

    def get_r_chars(self):
        return self.__r_table.keys()

    def get_shift_char(self, key, fallback=None):
        return self.__shift_table.get(key, fallback)

    def get_shift_chars(self):
        return self.__shift_table.keys()


class ThumbShiftSegment(segment.Segment):
    _prefs = None
    _thumb_typing_rule_section_base = None
    _thumb_typing_rule_section = None
    _r_table = {}

    def __init__(self, enchars=u'', jachars=u''):
        if not jachars:
            if u'!' <= enchars <= u'~':
                jachars = segment.unichar_half_to_full(enchars)
            else:
                jachars = enchars
                enchars = self._r_table.get(jachars, u'')
        super(ThumbShiftSegment, self).__init__(enchars, jachars)

    @classmethod
    def INIT_THUMB_TYPING_RULE(cls, prefs):
        cls._prefs = prefs
        if prefs == None:
            cls._thumb_typing_rule_section = None
            return
        method = prefs.get_value('thumb-typing-rule', 'method')
        if method == None:
            method = _THUMB_BASIC_METHOD
        cls._thumb_typing_rule_method = method
        keymap = prefs.get_value('thumb-typing-rule', 'list')
        if cls._thumb_typing_rule_method not in keymap.keys():
            cls._thumb_typing_rule_method = None
        cls._init_layout_table()

    @classmethod
    def _init_layout_table(cls):
        if cls._r_table != {}:
            cls._r_table.clear()
        method = cls._thumb_typing_rule_method
        if method != None:
            prefs = cls._prefs
            keymap = prefs.get_value('thumb-typing-rule', 'list')[method]
            for k in keymap.keys():
                value = keymap.get(k)
                ch = prefs.typing_from_config_key(k)
                if ch == '':
                    continue
                cls._set_bus_table(ch, value)
        else:
            for k in _table.keys():
                for c in _table_static[k]:
                    cls._r_table[c] = k

    @classmethod
    def _set_bus_table(cls, key, value):
        prefs = cls._prefs
        if value == None or len(value) != 3:
            return
        value = [prefs.unicode(prefs.str(value[0])),
                 prefs.unicode(prefs.str(value[1])),
                 prefs.unicode(prefs.str(value[2]))]
        if value[0] == u'' and \
                value[1] == u'' and value[2] == u'':
            return
        for c in value:
            cls._r_table[c] = key

    def is_finished(self):
        return not (self._jachars in _UNFINISHED_HIRAGANA)

    def append(self, enchar):
        if enchar == u'\0' or enchar == u'':
            return []
        text = self._jachars + enchar
        jachars = kana_voiced_consonant_rule.get(text, None)
        if jachars:
            self._enchars = self._enchars + self._r_table.get(enchar, u'')
            self._jachars = jachars
            return []
        return [ThumbShiftSegment(enchar)]

    def prepend(self, enchar):
        if enchar == u'\0' or enchar == u'':
            return []
        if self._jachars == u'':
            if 0x21 <= enchars <= 0x7e:
                self._enchars = enchar
                self._jachars = segment.unichar_half_to_full(enchars)
            else:
                self._enchars = self._r_table.get(enchar, u'')
                self._jachars = enchar
            return []
        return [ThumbShiftSegment(enchar)]

    def pop(self, index=-1):
        self._enchars = u''
        self._jachars = u''
        return