import argparse
import urllib.parse

def create_full_width(hex_value):
    hex_value = hex_value.upper()
    base_decimal = int(hex_value, 16)
    s = chr(base_decimal)

    if hex_value == '0A':
        s = 'LF'
    if hex_value == '0D':
        s = 'CR'

    fw_decimal = base_decimal + 0xFEE0
    fw_hex = format(fw_decimal, 'X')
    fw_char = chr(fw_decimal)
    fw_enc = urllib.parse.quote(fw_char).upper()

    return f"{fw_char} = %{fw_enc} = \\u{fw_hex} ⇒ %{hex_value} ({s})"

def showcase():
    # Example usage
    print(create_full_width('3C'))  # Output: ＜ = %EF%BC%9C = \uFF1C ⇒ %3C (<)
    print(create_full_width('3E'))  # Output: ＞ = %EF%BC%9E = \uFF1E ⇒ %3E (>)
    print(create_full_width('5C'))  # Output: ＼ = %EF%BC%BC = \uFF3C ⇒ %5C (\)
    print(create_full_width('2F'))  # Output: ／ = %EF%BC%8F = \uFF0F ⇒ %2F (/)
    print(create_full_width('27'))  # Output: ＇ = %EF%BC%87 = \uFF07 ⇒ %27 (')
    print(create_full_width('22'))  # Output: ＂ = %EF%BC%82 = \uFF02 ⇒ %22 (")
    print(create_full_width('0A'))  # Output: %0A (LF) ⇒ %EF%BB%AA = \uFEEA = ﻪ
    print(create_full_width('0D'))  # Output: %0D (CR) ⇒ %EF%BB%AD = \uFEED ⇒ ﻭ


def main():
    parser = argparse.ArgumentParser(description="Convert hex values to full-width characters and their URL-encoded representations.")
    parser.add_argument("--hex", help="Input hex value to convert", type=str, default=None)
    parser.add_argument("--demo", help="Showcase with demo input", action="store_true")
    args = parser.parse_args()

    if args.demo:
        showcase()
        
    if args.hex:
        print(create_full_width(args.hex))

if __name__ == "__main__":
    main()