import os
import sys
import glob
import parse_pdf

# List all PDF files in the given directory
def list_pdf_files(directory):
    pdf_files = glob.glob(os.path.join(directory, '*.pdf'))
    return pdf_files

# Extracts date from PDF filename and returns its content
def get_schedule_card_data(filepath):
    filename = os.path.basename(filepath)
    date_str = filename[:4]
    date_object = datetime.now()
    if len(date_str) < 4:
        raise ValueError("Filename must have at least four characters")
        return None

    month_str = date_str[:2]
    day_str = date_str[2:]

    try:
        month = int(month_str)
        day = int(day_str)

        year = datetime.now().year
        date_object = datetime(year=year, month=month, day=day)
    except ValueError as e:
        print(f"Error parsing date: {e}")
        return None

    schedule_card_data = {
        "schedule_date": date_object,
        "schedule_data": parse_pdf.parse_pdf_file(filepath)
    }

    return schedule_card_data


# Loop through data and remove duplicate codes.

# Check for existing codes via OwlBoard API.
# Validate existing codes and submit issue if not correct.

# Use the train list to search for stopping pattern of any absent codes.


# Format file and commit to git

def main():
    # Check for arguments
    if len(sys.argv) > 1:
        directory = sys.argv[1]
    else:
        directory = os.getcwd()

    if not os.path.isdir(directory):
        print(f"Error: '{directory}' is not a valid directory")
        return

    pdf_files = list_pdf_files(directory)
    if len(pdf_files) == 0:
        print(f"Error: '{directory}' contains no PDF files")
        return
    else:
        print(f"Found {len(pdf_files)} PDF files")


    ## For each file in list, run get_schedule_card_data(filepath)
    ## if returned value is not None, append to a list.  Once
    ## complete, pass to a validation function, then into Git handling
    ## function.

    
if __name__ == "__main__":
    main()