obfusfucker

#!/usr/bin/env python3

def get_num(n, ps=False):
    if ps:
        return scopify(get_num(n))
    if n == 0:
        return '+[]'
    elif n == 1:
        return '+!![]'
    elif n > 1:
        return '!+[]' + '+!![]' * (n - 1)

ALPHA = 'abcdefghijklmnopqrstuvwxyz'

def scopify(s):
    return f'({s})'

def get_char(c, ps=False, st=False):
    if c in '0123456789':
        return get_num(int(c), ps)
    for w, v in WORDS.items():
        n = w.find(c)
        if n != -1:
            return f'({v}+[])[{get_num(n)}]'
    if c == 'C':
        return f'{get_global("escape")}({get_char("<", True)})[{get_num(2)}]'
    elif c == 'E':
        return f'{get_global("escape")}({get_char(">")})[{get_num(2)}]'
    elif c == '<':
        return f'([]+[])[{make_string("italics")}](){f"[{get_num(0)}]" * (not st)}'
    elif c == '>':
        return f'([]+[])[{make_string("italics")}]()[{get_num(2)}]'
    elif c == '/':
        return f'([]+[])[{make_string("italics")}]()[{get_num(4)}]'
    elif c == 'S':
        return f'([]+{get_constr("([]+[])")})[{get_num(9)}]'
    elif c == 'g':
        return f'([]+{get_constr("([]+[])")})[{get_num(14)}]'
    elif c == 'm':
        return f'([]+{get_constr("(+[])")})[{get_num(11)}]'
    elif c == ',':
        return f'([[],[]]+[])'
    elif c in ALPHA:
        return f'({get_num(ALPHA.index(c) + 10)})[{make_string("toString")}]({get_num(36)})'
    else:
        return f'{get_constr("([]+[])")}[{make_string("fromCharCode")}]({get_num(ord(c))})'


def get_constr(v):
    return f'{v}[{make_string("constructor")}]'


def get_global(f):
    return f'{make_program(f"return {f}")}()'


def make_string(s):
    return '[]+' + ('+'.join(get_char(c, True if i else False) for i, c in enumerate(s)) if s else '[]')


def make_fun():
    return f'[][{make_string("flat")}]'


WORDS = {
    'true': '!![]',
    'false': '![]',
    'NaN': '+[![]]',
    'undefined': '[][[]]',
    'Infinity': f'+({get_num(1)}+[]+(!![]+[])[{get_num(3)}]+({get_num(1)}){"+(+[])" * 3})'
    }
WORDS['function flat() {'] = f'([]+{make_fun()})'

def make_program(prog):
    return f'{get_constr(make_fun())}({make_string(prog)})'

if __name__ == '__main__':
    import sys
    if len(sys.argv) > 1:
        with open(sys.argv[1]) as f:
            print(make_program(f.read()) + '()')
    else:
        print(f'Usage: {sys.argv[0]} [FILE]')
        print('Translate JavaScript into JsFuck.')