#!/bin/sh

set -e

TRASH="$HOME/.trash"
if [ ! -d "$TRASH" ]; then
    mkdir -p "$TRASH"
fi

empty_trash() {
    if [ ! -d "$TRASH" ] || [ -z "$(ls "$TRASH")" ]; then
        exit 0
    fi
    echo " +++ trash +++"
    ls "$TRASH"
    printf " +++ take it out? [yN] "; read -r yn
    if [ "$yn" = "y" ]; then
        printf ' +++ removing %s/* ' "$TRASH"
        rm -rf "${TRASH:?}/*"
        echo 'done.'
    fi
}

install_auto_empty() {
    case "$SHELL" in
        *zsh) logoutfile="$ZDOTDIR/.zlogout" ;;
        *bash) logoutfile="$HOME/.bash_logout" ;;
        *)
            echo "unknown shell $SHELL" 1>&2; exit 1 ;;
    esac
    cat > "$logoutfile" <<EOF
# auto-empty-trash routine of $0
yes | $0 --empty
EOF
}

case "$1" in
    -e|--empty)
        empty_trash
        exit 0 ;;
    -i|--install)
        install_auto_empty
        exit 0 ;;
    -h|--help)
        echo "usage: trash [-e|--empty] FILE..."
        exit 1 ;;
esac

# main
for f in "$@"; do
    echo "+ $(basename "$f")"
    mv "$f" "$TRASH/"
done