[PROJECT] Local HEIC-JPEG Converter

  import os                                     # for file system operations
  import logging                                # for logging conversion status
  from PIL import Image                         # for image processing
  from pillow_heif import register_heif_opener  # to handle HEIC files
  import tkinter                                # for GUI file dialogs
  from tkinter import filedialog                # for file dialog

  # Set up logging
  logging.basicConfig(level=logging.INFO, format="%(message)s")

  # Prevent an empty tkinter window from appearing
  tkinter.Tk().withdraw()

  def convert_files(files: list) -> None:
      """Iterates through a list of files and converts them to JPG format and saves them in the same directory."""

      for file in files:
          img = Image.open(file)
          destFilePath = os.path.splitext(file)[0] + ".jpg"
          img.save(destFilePath, "JPEG")
          logging.info(f"{file} converted to {destFilePath}")

  def convert_folder(inputFolder) -> None:
      """Converts all HEIC files in a folder to JPG format."""

      for file in os.listdir(inputFolder):
          # Skip if not a HEIC file
          if not file.lower().endswith(".heic"):
              logging.info(f"{file} is not a HEIC file. Skipping...")
              continue

          filePath = os.path.join(inputFolder, file)
          destFilePath = os.path.join(inputFolder, "converted_jpgs")

          if not os.path.exists(destFilePath):
              os.makedirs(destFilePath)

          output_file = os.path.join(destFilePath, os.path.splitext(file)[0] + ".jpg")
          img = Image.open(filePath.replace("\\", "/"))
          img.save(output_file, "JPEG")
          logging.info(f"{file} converted to {output_file}")

      logging.info("Conversion complete.")
      

  def main():
      """Main function that asks user for input and handles files and folders."""
      register_heif_opener()  # Register the HEIF file format with PIL

      print(
            """
            =====================================
              HEIC to JPG Converter
            =====================================
            """
      )

      while True:
          input_type = input(
              """
              Enter the action you would like to perform:
              
                [1] Convert all HEIC files in a folder
                [2] Convert individual HEIC files

              Type 'exit' or 'quit' to close the program.
              
              """
          )

          match input_type.lower():
              case "1":
                  try:
                      folder = filedialog.askdirectory(
                          title="Select folder containing HEIC files to convert."
                      )
                      convert_folder(folder)
                  except FileNotFoundError:
                      logging.info("Folder not found. Please try again.")
                      continue
                  break
              case "2":
                  files = filedialog.askopenfilenames(
                      title="Select HEIC files to convert."
                  )
                  convert_files(files)
                  break
              case "exit", "quit":
                  break
              case _:
                  logging.info("Invalid input. Please enter 'folder' or 'files'.")
                  continue

      input("\nPress enter to exit.")
      exit()


  if __name__ == "__main__":
      main()