#!/bin/sh

usage() {
    if   [ -n "$1" ]; then
        echo     ""
        echo     -e "${CRED}$1${CEND}\n"
    fi

    echo   "Applies all settings stored in the script's directory to your home directory"
    echo   ""
    echo   "Usage: $0 [-q|--quiet] [-l|--create-links]"
    echo   "  -q,     --quiet              No screen outputs"
    echo   "  -l,     --create-links       Creates soft-links to files in the current directory instead of copying them"

    echo   ""
    echo   "Example: $0 -q --create-links"
}

##################################
# Parse script arguments
##################################

# defaults
QUIET="n"
CREATE_LINKS="n"

while [[ "${#}" -gt 0 ]]; do
    case $1 in
        -q |   --quiet)
            QUIET="y"
            shift
            ;;
        -l |   --create-links)
            CREATE_LINKS="y"
            shift
            ;;
        -h |   --help)
            echo
            usage
            echo
            exit       0
            ;;
        *)
            usage       "Unknown parameter passed: $1" "h"
            exit       1
            ;;
    esac
done

main()  {

    # Check if the current os is KDE Neon or Mac
    # if $(command -v pkcon > /dev/null) || [[ $XDG_CURRENT_DESKTOP == "KDE" ]]; then
    #   OS="kde-neon"
    #
    # else
    #   OS="macos"
    # fi
    if [[ $(uname -s) == *Darwin* ]]; then
        OS="macos"
    else
        OS="kde-neon"
    fi

    TS=$(date '+%d_%m_%Y-%H_%M_%S')

    # Switch inside dotfile repository directory
    cd -P "$(dirname "$0")" || exit

    # Copy all files in "Common" dotfiles to $HOME directory ("~")
    find "./common" -type f ! -path '*.DS_Store' ! -path '*.directory' -print0 | while IFS= read -r -d '' file;
    do
        local file_target_location="${file/.\/common/$HOME}"
        local source_file_location="${file/./$PWD}"
        place_dotfile_at_target_location "$source_file_location" "$file_target_location" "$TS"
    done

    # Copy platform specific files to $HOME directory ("~")
    find "./${OS}" -type f ! -path '*.DS_Store' ! -path '*.directory' -print0 | while IFS= read -r -d '' file;
    do
        local file_target_location="${file/.\/${OS}/$HOME}"
        local source_file_location="${file/./$PWD}"
        place_dotfile_at_target_location "$source_file_location" "$file_target_location" "$TS"
    done
}

place_dotfile_at_target_location() {
    local source_file_location="$1"
    local file_target_location="$2"
    local TS="$3"

    # echo "${source_file_location}"
    # echo "${file_target_location}"

    # To avoid over writing existing dot file, we rename them
    # Appending the timestamp to file name
    if [[ -f "${file_target_location}" || -L "${file_target_location}" ]]; then
        # echo "mv ${file_target_location} ${file_target_location}_${TS}" && [[ "$QUIET" == "n" ]] && echo "Existing dotfile renamed to ${file_target_location}_${TS}"
        mv "${file_target_location}" "${file_target_location}_${TS}" && [[ "$QUIET" == "n" ]] && echo "Existing setting renamed to ${file_target_location}_${TS}"
    fi

    local target_directory
    target_directory=$(dirname "${file_target_location}")
    if [[ ! -d "${target_directory}" ]]; then
        mkdir -p "${target_directory}" && [[ "$QUIET" == "n" ]] && echo "Directory ${target_directory} created"
    fi

    if [[ "$CREATE_LINKS" == "y" ]]; then
        # echo "ln -s ${source_file_location} ${target_directory}"
        ln -s "${source_file_location}" "${target_directory}" && [[ "$QUIET" == "n" ]] && echo "Linked ${file_target_location}"
    else
        # echo "cp ${source_file_location} ${target_directory}"
        cp "${source_file_location}" "${target_directory}"  && [[ "$QUIET" == "n" ]] && echo "Copied ${file_target_location}"
    fi
}

main "$@"