import hashlib
import os

def calculate_sha1(file_path):
    sha1 = hashlib.sha1()
    with open(file_path, 'rb') as file:
        while True:
            data = file.read(8192)  # Reading chunks of 8KB
            if not data:
                break
            sha1.update(data)
    return sha1.hexdigest().upper()  # Returning the hash in uppercase

def find_files_and_calculate_sha1():
    current_directory = os.getcwd()
    extensions = ('.sdc')
    output_file = "sha1_hashes.txt"

    with open(output_file, 'w') as out_file:
        counter = 0
        for root, dirs, files in os.walk(current_directory):
            for file in files:
                # Convert file name to lowercase before extension check
                if file.lower().endswith(extensions):
                    file_path = os.path.join(root, file)
                    relative_path = os.path.relpath(file_path, start=current_directory)
                    sha1_hash = calculate_sha1(file_path)
                    out_file.write(f"{relative_path}\t{sha1_hash}\n")
                    counter += 1
                    print(f"{counter}. Processing: {relative_path}")

    print(f"SHA1 hashes written to {output_file}")

# Calling the function to execute the hash calculation
find_files_and_calculate_sha1()