#!/bin/bash

# COMP_CWORD - shell funcs
# COMP_LINE
# COMP_POINT
# COMP_TYPE
# COMP_KEY
# COMP_WORDBREAKS - shell funcs
# COMP_WORDS - shell funcs
# COMPREPLY - return variable

# supply COMP_WORDS over stdin ('\0' seperated)
# read COMPREPLY from stdout ('\0' seperated)

function _cmlterm() {
	local exe="$1"
	local word="$2"
	local prev_word="$3"
	
	# re-export it for the completions binary
	#export COMP_LINE="$COMP_LINE"
	#export COMP_POINT="$COMP_POINT"
	#export COMP_TYPE="$COMP_TYPE"
	#export COMP_KEY="$COMP_KEY"

	local BINNAME="__cmlterm_shell_completion"
	local binpath="$BINNAME"

	# helpful during development
	if which "./target/debug/$BINNAME" &>/dev/null ; then
		binpath="./target/debug/$BINNAME"
	elif which "../target/debug/$BINNAME" &>/dev/null ; then
		binpath="../target/debug/$BINNAME"
	fi # hopefully it's globally available... not much more we can try

	if [ -z "$COMP_DEBUGFILE" ] ; then
		local COMP_DEBUGFILE=/dev/null
	elif [ -d "$COMP_DEBUGFILE" ] ; then
		echo -e "\nWarning: \$COMP_DEBUGFILE is set to a directory. Sending completions debug output to /dev/null"
		local COMP_DEBUGFILE=/dev/null
	fi

	readarray -d $'\0' COMPREPLY < <(
		for i in "${COMP_WORDS[@]}" ; do
			echo -n "$i"
			echo -ne '\0'
		done | \
			COMP_LINE="$COMP_LINE" \
			COMP_POINT="$COMP_POINT" \
			COMP_TYPE="$COMP_TYPE" \
			COMP_KEY="$COMP_KEY" \
			"$binpath" --wordbreaks "$COMP_WORDBREAKS" --exe "$exe" --word "$word" --prev-word "$3" 2>"$COMP_DEBUGFILE"
	)

	if [[ "${#COMPREPLY[@]}" -eq 0 && -z "$CML_HOST" && -z "$CML_USER" && ( -z "$CML_PASS" || -z "$CML_PASS64") ]] ; then
		echo -e "\nNo completions found. Are CML_HOST/CML_USER/CML_PASS64 environment variables set?" >&2
	fi
}

[[ "${BASH_SOURCE[0]}" != "${0}" ]] || echo "the completions script must be sourced into the shell, not ran as a subshell"

complete -r cmlterm 2>/dev/null
complete -r .cmlterm 2>/dev/null
complete -r ./target/debug/cmlterm 2>/dev/null
complete -r ../target/debug/cmlterm 2>/dev/null
complete -o nospace -o nosort -F _cmlterm cmlterm
complete -o nospace -o nosort -F _cmlterm .cmlterm