import os

input_directory = "./data"
output_file = "join/merged_openbci.txt"
separator = "\n" + "=" * 40 + "\n"


if not os.path.isdir(input_directory):
    raise FileNotFoundError(f"La carpeta especificada no existe: {input_directory}")

# Obtener lista de archivos TXT
txt_files = sorted([f for f in os.listdir(input_directory) if f.endswith(".txt")])

if not txt_files:
    raise FileNotFoundError("No se encontraron archivos TXT en la carpeta especificada.")

# Combinar archivos en uno solo
with open(output_file, "w", encoding="utf-8") as outfile:
    for i, file in enumerate(txt_files):
        file_path = os.path.join(input_directory, file)

        with open(file_path, "r", encoding="utf-8") as infile:
            outfile.write(f"### Contenido de: {file} ###\n")
            outfile.write(infile.read())

            if i < len(txt_files) - 1:
                outfile.write(separator)

print(f"Archivos combinados en '{output_file}' exitosamente. ✅")