#!/bin/bash

# Default values
VERBOSE=false
INPUT_FILE=""
OUTPUT_DIR="./output"

# Function to display usage information
usage() {
  echo "Usage: $0 [-v] [-i <input_file>] [-o <output_directory>]"
  echo "  -v: Enable verbose output"
  echo "  -i <input_file>: Specify an input file (required)"
  echo "  -o <output_directory>: Specify an output directory (default: ./output)"
  echo "  -h: Display this help message"
  exit 1
}

# Parse command line options
while getopts "vi:o:h" opt; do
  case "${opt}" in
    v)
      VERBOSE=true
      ;;
    i)
      INPUT_FILE="${OPTARG}"
      ;;
    o)
      OUTPUT_DIR="${OPTARG}"
      ;;
    h)
      usage
      ;;
    *)
      echo "Invalid option: -${OPTARG}" >&2
      usage
      ;;
  esac
done
shift $((OPTIND-1)) # Remove parsed options from argument list

# Validate required arguments
if [ -z "${INPUT_FILE}" ]; then
  echo "Error: Input file must be specified using -i." >&2
  usage
fi

# Create output directory if it doesn't exist
if [ ! -d "${OUTPUT_DIR}" ]; then
  mkdir -p "${OUTPUT_DIR}"
  [ "${VERBOSE}" = true ] && echo "Created output directory: ${OUTPUT_DIR}"
fi

# Main script logic
[ "${VERBOSE}" = true ] && echo "Verbose mode enabled."
echo "Processing file: ${INPUT_FILE}"
echo "Output directory: ${OUTPUT_DIR}"

# Example of what the script might do
# cp "${INPUT_FILE}" "${OUTPUT_DIR}/$(basename ${INPUT_FILE})"
# echo "File copied to ${OUTPUT_DIR}/$(basename ${INPUT_FILE})"