import re
import nltk
from nltk.corpus import stopwords

def eliminar_acento(s):
    replacements = (
        ("á", "a"),
        ("é", "e"),
        ("í", "i"),
        ("ó", "o"),
        ("ú", "u"),
    )
    for a, b in replacements:
        s = s.replace(a, b).replace(a.upper(), b.upper())
    return s

def eliminar_patrones_stopwords(text):
    nltk.download('stopwords')
    lstopwords = set(stopwords.words('spanish'))
    
    text = [word for word in text.strip().split() if not word in lstopwords]
    text = ' '.join(text)
    return text

def eliminar_espacios_blancos(texto):
    texto = re.sub(r"\:|\_", '', texto)
    texto = re.sub(r"o\/a", 'o', texto)
    
    texto = re.sub(r'[^\w\s]', '', texto)
    return texto
    
def clean_text(original):
    original = re.sub(r'\w+(?:\.+\w+)*', lambda x: x.group(0).replace('.', ' '), original)
    original = re.sub(r'\.','' , original)

    texto = eliminar_acento(original)
    texto = eliminar_espacios_blancos(texto)
    texto = re.sub(r" +", ' ', texto)
   
    texto = texto.lower()
    texto = eliminar_patrones_stopwords(texto)
    original =  re.sub(r" +", ' ', texto)
    return texto