#!/usr/bin/env python3
import re
import os
import nltk
from nltk.corpus import words
from nltk.corpus import wordnet

try:
    word_list = words.words()
    nltk.download('wordnet')
except LookupError:
    nltk.download('words')
    nltk.download('wordnet')
    word_list = words.words()

word_set = set(word.lower() for word in word_list)
common_words = ['and', 'in', 'the', 'of', 'to', 'at', 'by', 'for', 'with', 'from']
always_valid = {'the', 'a', 'an', 'and', 'or', 'but', 'nor', 'for', 'yet', 'so'}

def is_word(word):
    if word.lower() in always_valid:
        print(f"  Checking if '{word}' is in dictionary: True (common word)")
        return True
    
    in_words = word.lower() in word_set
    in_wordnet = bool(wordnet.synsets(word))
    result = in_words and in_wordnet
    print(f"  Checking if '{word}' is in dictionary: {result} (words:{in_words}, wordnet:{in_wordnet})")
    return result

def process_word(word):
    print(f"\nProcessing word: '{word}'")
    
    if is_word(word):
        print(f"  '{word}' is in dictionary, returning as-is")
        return word
        
    print(f"  '{word}' not in dictionary, checking for common words at end...")
    for common in common_words:
        if word.lower().endswith(common):
            print(f"  Found '{common}' at end of '{word}'")
            remainder = word[:-len(common)]
            common_case = word[-len(common):]
            print(f"  Recursively processing remainder: '{remainder}'")
            return f"{process_word(remainder)} {common_case}"
    
    print(f"  No common words found at end of '{word}'")
    
    match = re.search(r'([a-zA-Z]+)(\d+)$', word)
    if match:
        text, num = match.groups()
        print(f"  Found number at end: '{text}' + '{num}'")
        if is_word(text):
            return f"{text} {num}"
            
    print(f"  Returning '{word}' unchanged")
    return word

def split_filename(filename):
    print(f"\nProcessing filename: {filename}")
    base = os.path.splitext(filename)[0]
    ext = os.path.splitext(filename)[1]
    
    print(f"Splitting on delimiters...")
    parts = re.split('([_\-\s])', base)
    
    result = []
    for part in parts:
        if part in '_-':
            result.append(' ')
        else:
            print(f"\nSplitting on capitals: {part}")
            words = re.split('(?<!^)(?=[A-Z])', part)
            print(f"Got words: {words}")
            processed = [process_word(word) for word in words]
            result.append(' '.join(processed))
    
    final = ' '.join(''.join(result).split())
    return final + ext

def main():
    # Get all files in current directory
    files = [f for f in os.listdir('.') if os.path.isfile(f)]
    
    for filename in files:
        if filename.startswith('.'):  # Skip hidden files
            continue
            
        print(f"\n{'='*50}")
        print(f"Original: {filename}")
        new_name = split_filename(filename)
        print(f"New name: {new_name}")
        
        if new_name != filename:
            try:
                os.rename(filename, new_name)
                print(f"Renamed: {filename} -> {new_name}")
            except OSError as e:
                print(f"Error renaming {filename}: {e}")

if __name__ == "__main__":
    main()