#!/usr/bin/env dash

# shellcheck source=/dev/null
SHELL_LIBRARY_VERSION="2.1.2" . %SHELL_LIBRARY_PATH

help() {
    cat <<EOF
A simply file copyright menagment system

USAGE:
    stamp [OPTIONS] FILE_OR_DIRECTORY

OPTIONS:
    --help      | -h
                            Display this help and exit.

    --version   | -v
                            Display version and copyright information and exit.

    --license   | -l L
                            Specify a license.
ARGUMENTS:
    FILE_OR_DIRECTORY := [[fd . --max-depth 3]]
                            Possible files to stamp.

    L                 := GPL-3.0-or-later|CC-BY-SA-4.0|AGPL-3.0-or-later
                            A possible license identifier. These above are only suggestions.
EOF
}

reuse_run() {
    root="$(git rev-parse --show-toplevel)"

    if [ -e "$root/.reuse/templates/default" ]; then
        reuse annotate \
            --copyright "$(git config --get user.name) <$(git config --get user.email)>" \
            --copyright-style string-c \
            --template default \
            --license "$license" "$1"
    else
        reuse annotate \
            --copyright "$(git config --get user.name) <$(git config --get user.email)>" \
            --copyright-style string-c \
            --license "$license" "$1"
    fi
}

for arg in "$@"; do
    case "$arg" in
    "--help" | "-h")
        help
        exit 0
        ;;
    "--version" | "-v")
        version
        exit 0
        ;;
    esac
done

while [ "$#" -gt 0 ]; do
    case "$1" in
    "--license" | "-l")
        shift 1
        license="$1"
        [ "$license" ] || die "No license specified. See --help for more."
        shift 1
        ;;
    *)
        file="$1"
        shift 1
        ;;
    esac
done

if [ -d "$file" ]; then
    fd . "$file" --type file | while read -r path_file; do
        reuse_run "$path_file"
    done
else
    reuse_run "$file"
fi

# vim: ft=sh