#!/bin/bash
#
# This script is to be sourced into your bash shell to provide command-line TAB completion
# of options, resources and commands for the service_mgr script.
#
# To source this script, you can:
#
#  1. source service_mgr_completion
#  2. . service_mgr_completion
#
# If you want this to be available at all times, you can add one of the source commands
# above into your .bashrc.
# 

#
# See if the any of the words currently on the command line are one of the valid resources.
# 
# The first argument is a list of words currently on the
# command line, the second+ arguments are the valid resources.
#
# If a match is found, the matching resource is echoed to stdout and the result code is set 
# to 0.
#
svc_mgr_find_match () {
    local resource
    local word
    for word in $1
    do
        for resource in ${@:2}
        do
            [[ "$word" == "${resource}" ]] && echo $word && return 0
        done
    done
    return 1
}

#
# This is the function return to perform completion analysis (see the 'complete' statement at
# the end of this script.
#
_ServiceMgrComplete() {
    local cur

    COMPREPLY=() # Array storing the possible completions
    cur=${COMP_WORDS[COMP_CWORD]} # Store the current word on the command line

    case "$cur" in
        -*)
            # The current word on the command line starts with dash. Check against all
            # the valid command line options.
            COMPREPLY=( $( compgen  -W '-h --help -s --server -n --no-ssl -l --list -t --token -p --third-party-id --d --service-definition-id -a --configured-account-id' -- $cur ) )
            ;;

        *)
            # The current word on the command line is anything but a '-'. We need
            # to determine the appropriate completions based on what has already
            # been entered

            resources=$(valid_resources) # Get the list of valid resources
            current_word_list=${COMP_WORDS[@]} # Create a list of the current words on the
                                               # command line
            
            # Determine if one of the words currently on the command line is one
            # of the valid resources
            matched_name=$(svc_mgr_find_match "$current_word_list" ${resources})
            resource_on_command_line=$?
            if [[ $resource_on_command_line == 0 ]]
            then
                # One of the words on the command line was one of our resources. Now
                # get the list of valid commands for that resource and complete against them...
                commands=$(valid_commands $matched_name)
                COMPREPLY=( $( compgen -W '$commands' -- $cur ) )
            else
                # There was not a resource name on the command line. Complete the current
                # word against the list of valid resources
                COMPREPLY=( $( compgen  -W '$resources' -- $cur ) )
            fi
            ;;
    esac

    return 0
}

# Register the _ServiceMgrComplete function as a completion function for
# all executables named 'service_mgr'.
complete -F _ServiceMgrComplete -o filenames service_mgr