from PIL import Image
from pytesseract import pytesseract
import os
from configparser import ConfigParser
import shutil


def scan_document_folder() -> None:
    """Scan Input Ordner fuer OCR Analyse und Verarbeitung der Bilder
    """
    ocr_config = ConfigParser()
    ocr_config.read("ocr_config.ini")
    ocr_settings = ocr_config['ocr']
    path_to_tesseract = ocr_settings["path_to_tesseract"]    
    pytesseract.tesseract_cmd = path_to_tesseract

    #Get the file names in the directory
    for root, dirs, file_names in os.walk(ocr_settings["path_to_input"]):
        #Iterate over each file name in the folder
        for file_name in file_names:
            #Open image with PIL
            source_path = os.path.join(ocr_settings["path_to_input"], file_name)
            img = Image.open(source_path)
            #Extract text from image
            language = "deu"
            pageseg_mode = "3" # Auto-Segmentation
            options = f"-l {language} --psm {pageseg_mode}"
            text = pytesseract.image_to_string(img,config=options)

            # Prep target folder + files
            file,file_ext = os.path.splitext(file_name)
            target_path = os.path.join(os.path.dirname(os.path.abspath(__file__)) , ocr_settings["path_to_output"] , file,"")            
            os.makedirs(os.path.dirname(target_path), exist_ok=True)            
            print(f"Creating files for : {file}")

            original_file = os.path.join(os.path.dirname(os.path.abspath(__file__)) , ocr_settings["path_to_output"] , file,"")
            shutil.copy2(source_path,original_file)
            os.remove(source_path)

            extracted_file = os.path.join(os.path.dirname(os.path.abspath(__file__)) , ocr_settings["path_to_output"] , file, file + ".txt")
            with open(extracted_file, "w") as text_file:
                text_file.write(text)

            pdf_file = os.path.join(os.path.dirname(os.path.abspath(__file__)) , ocr_settings["path_to_output"] , file, file + ".pdf")
            img.save(pdf_file, "PDF" ,resolution=100.0, save_all=True)


def export_to_mount(symlinks=False, ignore=None) -> None:    
    """Export zu einem externen Folder(z.b. NAS Mount)

    Args:
        symlinks (bool, optional): Config, ob shutil symlinks beruecksichtigen soll. Defaults to False.
        ignore (str, optional): Config, ob shutil gewisse Files ignorieren soll. Defaults to None.
    """
    # Read Config, Setup
    ocr_config = ConfigParser()
    ocr_config.read("ocr_config.ini")
    ocr_settings = ocr_config['ocr']
    
    src = os.path.join(os.path.dirname(os.path.abspath(__file__)) , ocr_settings["path_to_output"])
    mount_path = ocr_settings["path_to_mount"]
    for item in os.listdir(src):
        s = os.path.join(src, item)
        d = os.path.join(mount_path, item)
        if os.path.isdir(s):
            shutil.copytree(s, d, symlinks, ignore)
        else:
            shutil.copy2(s, d)
        shutil.rmtree(s)


def match_tags():
    # Match Tags aus der Config fuer Doc-Renaming 
    # je nachdem welche Worte im Dokument vorhanden sind wird das Dokument umbenannt     
    # Todo einbauen wenn notwendig
    pass


if __name__ == "__main__":
    scan_document_folder()
    export_to_mount()