import csv

input_file = "../data/passengers.csv"
output_file = "../data/passengers2.csv"

with open(input_file, 'r') as csv_input:
    with open(output_file, 'w', newline='') as csv_output:
        reader = csv.reader(csv_input)
        writer = csv.writer(csv_output)

        # Iterate through each row in the CSV
        for row in reader:
            # If the row is not empty
            if row:
                # Split name into last name and rest of name
                split_name = row[3].split(',', 1)

                if len(split_name) == 2:
                    lastname, rest_of_name = split_name
                    # further split name into salutation and first name
                    split_rest_of_name = rest_of_name.split('.', 1)

                    if len(split_rest_of_name) == 2:
                        salutation, first_name = [name.strip() for name in split_rest_of_name]
                    else:
                        salutation, first_name = split_rest_of_name[0], ""

                    row[3:4] = [first_name, salutation, lastname]
                writer.writerow(row)