#!/bin/bash
pname="$(basename "$0")"

function usage(){
    printf "\n"
    printf "%s usage:\n" "$pname"
    printf "    %s [-f file] [-v voice] [-l lang] [-?|-h|--help] [text…]\n" "$pname"
    printf "\n"
}

function error(){
    printf "%s error: %s\n" "$pname" "$@"
    usage
}

voice=()
infile="/tmp/speak-$$.txt"
errfile="/tmp/speak-${UID}.err"
infile_set=0
if [ $# -ge 1 ] ; then
    case "$1" in
    -*)
        while  [ $# -ge 1 ] ; do
            case "$1" in
            -f)
                infile="$2"
                if [ -z "$infile" ] ; then
                    error "Missing file name after -f"
                    exit 1
                fi
                infile_set=1
                shift; shift
                ;;
            -v)
                v="$2"
                if [ ! -z "$v" ] ; then
                    voice=(-v "$v")
                fi
                shift;shift
                ;;
            -l)
                lang="$2"
                v="$(say -v ? | grep " ${lang}_"|sed -n -e '1s/^\([^ ]*\) .*/\1/p')"
                if [ ! -z "$v" ] ; then
                    voice=(-v "$v")
                fi
                shift;shift
                ;;
            -?|-h|--help)
                usage
                exit 0
                ;;
            -*)
                error "Invalid option $1"
                exit 1
                ;;
            *)
                if [ $infile_set -eq 0 ] ; then
                    echo "$@" > "$infile"
                    set --
                else
                    error "Cannot have both -f and text arguments."
                    exit 1
                fi
                ;;
            esac
        done
        ;;
    *)
        echo "$@" > "$infile"
        ;;
    esac
else
    cat > "$infile"
fi

trap 'rm "$infile"' 0

case "$(uname)" in
Darwin)
    say "${voice[@]}" -f "$infile"
    ;;
*)
    # todo: check whether speakd runs.
    if type -p espeak >/dev/null ; then
        espeak -v lancashire -s 180 -p 70 -a 18 "${voice[@]}" -f "$infile" 2>"$errfile"
    else
        voice_options=( -v lancashire -s 180 -a 4 )
        fifo="/tmp/speakd"
        echo "$infile" >> "$fifo"
    fi
    ;;
esac
exit 0