#!/usr/bin/env bash

# 26.03.05 :: klevstul


continue_if_yes() {
    # -n 1:             Reads only one character.
    # -r:               Prevents backslash interpretation.
    # Case handling:    Accepts both uppercase and lowercase y/Y and n/N.
    # Default behavior: Pressing Enter defaults to n, avoiding accidental continuation.
    # Loop:             Repeats until valid input is given.
    local prompt="${1:-continue?: }"
    while true; do
        echo ""
        read -r -n 1 -p "$prompt [y/n]:" answer
        case "$answer" in
            [Yy])
                echo  # Move to next line after input
                return 0  # Continue execution
                ;;
            [Nn]|"")
                echo  # Move to next line
                return 1  # Exit or skip action
                ;;
            *)
                echo -e "\nplease answer 'y' or 'n'."
                ;;
        esac
    done
}

backupDeploy() {

    # Key Options for Copy:
    #     -r (recursive): Recursive copying.
    #     -v (verbose): Show each file as it is copied.
    #     -p (preserve): Keep original file permissions, ownership, and timestamps.
    #     -i (interactive): Prompt before overwriting existing files.
    #     -n (no-clobber): Skip copying if the destination file exists.
    #     -u (update): Copy only when the source is newer than the destination.

    local operation=$1
    local repo_dir="/home/poq/syncDir/gitRepos/gi.op.fo/lnx-arch/dots/nwg-panel"
    local nwgp_dir="/home/poq/.config/nwg-panel"
    local filenames=("common-settings.json" "config" "style.css")
    local files=()

    if [[ "${operation}" == "backup" ]]; then
        echo -e "\nthe following files will be copied to the repository (old files in the repo will potentially be overwritten):"

        for filename in "${filenames[@]}"; do
            local file="${nwgp_dir}/${filename}"
            echo "- ${file}"
            files+=(${file})
        done

        if continue_if_yes "would you like to proceed?"; then

            echo "proceeding..."

            for file in "${files[@]}"; do
                cp -v ${file} ${repo_dir}/
            done

        else
            echo "operation cancelled."
        fi


    elif [[ "${operation}" == "deploy" ]]; then

        echo "deploying config files and restarting nwg-panel..."

        cp -v -r ${repo_dir}/* ${nwgp_dir}
        pkill nwg-panel > /dev/null 2>&1
        nwg-panel > /dev/null 2>&1 &

    else

        echo "error: unknown operation '${operation}'"

    fi

}

this_file_name=`basename "$0"`
if [ $# -lt 1 ]; then
    echo "error: operation {backup|deploy} is missing."
    echo "usage: '$this_file_name {backup|deploy}'"
    exit 1
fi

backupDeploy $1