#!/bin/bash

# Configuration / Default values
OUTPUT_FILE="output.txt"
VERBOSE=false
ACTION="default"
COUNT=1

# Function to display script usage
usage() {
    echo "Usage: $0 [-f <file>] [-a <action>] [-c <count>] [-v] [-h]"
    echo "  -f <file>    Specify an output file (default: $OUTPUT_FILE)"
    echo "  -a <action>  Specify an action to perform (e.g., 'deploy', 'test', 'build')"
    echo "  -c <count>   Specify a numerical count (default: $COUNT)"
    echo "  -v           Enable verbose mode"
    echo "  -h           Display this help message"
    exit 0
}

# --- Main Script Logic ---

# Use getopts for parsing short options
# ':' after an option means it requires an argument
# 'h' for help, 'v' for verbose
# 'f:' for file, 'a:' for action, 'c:' for count
while getopts "hvf:a:c:" opt; do
    case "${opt}" in
        h)
            usage
            ;;
        v)
            VERBOSE=true
            echo "Verbose mode enabled."
            ;;
        f)
            OUTPUT_FILE="${OPTARG}"
            ;;
        a)
            ACTION="${OPTARG}"
            ;;
        c)
            # Basic validation for count to be a number
            if [[ "$OPTARG" =~ ^[0-9]+$ ]]; then
                COUNT="${OPTARG}"
            else
                echo "Error: Count must be a number." >&2
                usage
            fi
            ;;
        :)
            echo "Error: Option -${OPTARG} requires an argument." >&2
            usage
            ;;
        ?)
            echo "Error: Invalid option -${OPTARG}." >&2
            usage
            ;;
    esac
done

# Shift off the options and their arguments, so that "$@" refers to the remaining non-option arguments.
shift $((OPTIND -1))

echo "--- Script Configuration ---"
echo "Output File: $OUTPUT_FILE"
echo "Action: $ACTION"
echo "Count: $COUNT"
echo "Verbose: $VERBOSE"

if [ -n "$@" ]; then
    echo "Remaining arguments (non-options): $@"
fi
echo "--------------------------"

# Example logic based on parsed arguments
case "$ACTION" in
    deploy)
        echo "Initiating deployment for $COUNT times to $OUTPUT_FILE..."
        # Add deploy specific logic
        ;;
    test)
        echo "Running tests $COUNT times with output to $OUTPUT_FILE..."
        # Add test specific logic
        ;;
    build)
        echo "Building project $COUNT times..."
        # Add build specific logic
        ;;
    *)
        echo "Performing default action."
        for i in $(seq 1 $COUNT); do
            echo "Hello from default action ($i/$COUNT)!" >> "$OUTPUT_FILE"
        done
        echo "Default output written to $OUTPUT_FILE"
        ;;
esac

echo "Script finished."