import random
import string
import urllib.parse

from unidecode import unidecode

from .config import WORDS_FILE_PATH
from .log import LOG

with open(WORDS_FILE_PATH) as f:
    LOG.d("load words file: %s", WORDS_FILE_PATH)
    _words = f.read().split()


def random_word():
    return random.choice(_words)


def word_exist(word):
    return word in _words


def random_words():
    """Generate a random words. Used to generate user-facing string, for ex email addresses"""
    # nb_words = random.randint(2, 3)
    nb_words = 2
    return "_".join([random.choice(_words) for i in range(nb_words)])


def random_string(length=10, include_digits=False):
    """Generate a random string of fixed length """
    letters = string.ascii_lowercase
    if include_digits:
        letters += string.digits

    return "".join(random.choice(letters) for _ in range(length))


def convert_to_id(s: str):
    """convert a string to id-like: remove space, remove special accent"""
    s = s.replace(" ", "")
    s = s.lower()
    s = unidecode(s)

    return s


_ALLOWED_CHARS = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_-."


def convert_to_alphanumeric(s: str) -> str:
    ret = []
    # drop all control characters like shift, separator, etc
    for c in s:
        if c not in _ALLOWED_CHARS:
            ret.append("_")
        else:
            ret.append(c)

    return "".join(ret)


def encode_url(url):
    return urllib.parse.quote(url, safe="")


def sanitize_email(email_address: str) -> str:
    if email_address:
        return email_address.lower().strip().replace(" ", "").replace("\n", " ")
    return email_address


def query2str(query):
    """Useful utility method to print out a SQLAlchemy query"""
    return query.statement.compile(compile_kwargs={"literal_binds": True})