# 通用企业名称去噪

special_chars = ['.',
                 ',',
                 '-',
                 '(',
                 ')',
                 '@',
                 '?',
                 '‘',
                 '’',
                 '“',
                 '”',
                 '`',
                 '#',
                 '+',
                 '!',
                 '$',
                 '|',
                 ':',
                 '/',
                 ';',
                 '*',
                 '《',
                 '》',
                 '<',
                 '>',
                 '%',
                 '^',
                 '_',
                 '[',
                 ']',
                 '{',
                 '}',
                 '\\',
                 '~',
                 '＝',
                 '\'',
                 '±',
                 '°',
                 '«',
                 '»',
                 'µ',
                 '¶',
                 '·',
                 '€',
                 '£',
                 '¥',
                 '¢',
                 '×',
                 '÷',
                 '¬',
                 '…',
                 '→',
                 '←',
                 '↑',
                 '↓',
                 '↔',
                 '⇒',
                 '⇐',
                 '≈',
                 '≠',
                 '≤',
                 '≥',
                 '．',
                 '，',
                 '－',
                 '（',
                 '）',
                 '＠',
                 '？',
                 '"',
                 '\'',
                 '＃',
                 '＋',
                 '！',
                 '＄',
                 '｜',
                 '：',
                 '／',
                 '；',
                 '＊',
                 '＜',
                 '＞',
                 '％',
                 '＾',
                 '＿',
                 '［',
                 '］',
                 '｛',
                 '｝',
                 '＼',
                 '～',
                 '¨',
                 '´',
                 '',
                 '¿',
                 '‰',
                 '¯',
                 ]
special_char_dict = {c: ' ' for c in set(special_chars)}
special_char_dict['&'] = ' and '
special_char_dict['＆'] = ' and '
special_chars_trans = str.maketrans(special_char_dict)

head_list = ['MS ', 'M S ']

tail_list = [' I PRIVATE LIMITED',
             ' I PRIVATELIMITED',
             ' PrivateATE LIMITED',
             ' COMPANY LIMITED',
             ' PRIVATE LIMITED',
             ' PRIVATELIMITED',
             ' COMPANY PRIVATE L',
             ' COMPANY I PRIVATE L',
             ' CO I PRIVATE L',
             ' CO PRIVATE L',
             ' I PRIVATE L',
             ' I PRIVATE',
             ' PRIVATE L',
             ' COMPANY PVT L',
             ' I LIMITED',
             ' LIMITED',
             ' P LTD',
             ' CO I LTD',
             ' I LTD',
             ' CO I PVT L',
             ' CO PVT L',
             ' PVT L',
             ' LTD',
             ' CO I',
             ' I PVT L',
             ' I PVT',
             ' PVT LTD',
             ' PVT L',
             ' PVT',
             ' PRIVATE',
             ' CO',
             ' INC',
             ' I']

special_tail_list = [' CO LIMITED',
                     ' CO LTD',
                     ' COLTD']


def sub_head(name):
    for head in head_list:
        if name.startswith(head):
            name = name[len(head):]
            break
    return name


def sub_tail(name):
    for tail in special_tail_list:
        no_tail = f'AND{tail}'
        if name.endswith(tail):
            if name.endswith(no_tail):
                return name
            else:
                return name[:-len(tail)]
    for tail in tail_list:
        if name.endswith(tail):
            return name[:-len(tail)]
    return name


def clean_company_name(name):
    if name:
        # 特殊字符替换为空格
        name = name.translate(special_chars_trans)
        # 转大写，去除连续空格，去除首尾空格
        name = ' '.join(name.upper().split())
        return name
    else:
        return None


def clean_pre_join(name):
    o_name = clean_company_name(name)
    if not o_name:
        return None
    name = sub_head(o_name)
    name = sub_tail(name)
    if len(name) < 8:
        return o_name
    return name