#!/bin/bash

_frobnicate () {
    local cur prev
    local allargs possibilities
    cur="${COMP_WORDS[$COMP_CWORD]}"
    prev="${COMP_WORDS[$(( $COMP_CWORD - 1 ))]}"

    allargs=" --reporter --assignee -h -v -d --description "

    if [ "$COMP_CWORD" = 1 ] ; then
        possibilities="$allargs"

                
    # Our previous argument is explicitly one of the 
    # options we support!
    elif [[ "$allargs" == *" $prev "* ]] ; then

        # Our previous option expects an arbitrary string
        # No autocomplete is possible
        if [ "$prev" = "--description" ] ; then        
            return

        # they want help? try to get them to hit 'enter' now
        elif [ "$prev" = "-h" ] ; then
            return

        # Our previous option was one of the options
        # that does not take any value, so all options
        # are on the table
        elif [ "$prev" = "-v" -o "$prev" = "-d" ] ; then
            possibilities="$allargs"
    
        # Our previous option expects a username
        elif [ "$prev" = "--reporter" -o "$prev" = "--assignee" ] ; then
            possibilities=$(getent passwd | awk -F: '$3 > 1000 {print $1}')
        fi

    else
        possibilities="$allargs"
    fi

    if [ -n "$possibilities" ] ; then
        COMPREPLY=(
            $(compgen -W "$possibilities" -- "$cur" )
        )
    fi
}
complete -F _frobnicate frobnicate