# Relational pipes
# Copyright © 2020 František Kučera (Frantovo.cz, GlobalCode.info)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 3 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.

_relpipe_in_jack_completion_read_nullbyte() { local IFS=; for v in "$@"; do export "$v"; read -r -d '' "$v"; done }

_relpipe_in_jack_completion_ports() {
	if type relpipe-in-jack &> /dev/null && type relpipe-out-nullbyte &> /dev/null; then
		relpipe-in-jack --list-ports true --list-midi-messages false 2>/dev/null \
			| relpipe-out-nullbyte \
			| while _relpipe_in_jack_completion_read_nullbyte "name" "input" "output" "physical" "terminal" "mine" "midi" "type"; do
				 if [[ "$midi" = "true" && "$output" = "true" && "$mine" = "false" ]]; then echo "$name"; fi; done
	fi
}

_relpipe_in_jack_completion() {
	local w0 w1 w2 w3

	COMPREPLY=()
	w0=${COMP_WORDS[COMP_CWORD]}
	w1=${COMP_WORDS[COMP_CWORD-1]}
	w2=${COMP_WORDS[COMP_CWORD-2]}
	w3=${COMP_WORDS[COMP_CWORD-3]}

	BOOLEAN_VALUES=(
		"true"
		"false"
	)

	  if [[ "$w1" == "--client"                       && "x$w0" == "x" ]];    then COMPREPLY=("'relpipe-in-jack'")
	elif [[ "$w1" == "--port"                         && "x$w0" == "x" ]];    then COMPREPLY=("'midi-in'")
	elif [[ "$w1" == "--connect-to"                                    ]];    then COMPREPLY=($(compgen -W "$(_relpipe_in_jack_completion_ports)" -- "$w0"))
	elif [[ "$w1" == "--required-connections"         && "x$w0" == "x" ]];    then COMPREPLY=("0")
	elif [[ "$w1" == "--list-ports"                                    ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
	elif [[ "$w1" == "--list-connections"                              ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
	elif [[ "$w1" == "--list-midi-messages"                            ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
	else
		OPTIONS=(
			"--client"
			"--port"
			"--connect-to"
			"--required-connections"
			"--list-ports"
			"--list-connections"
			"--list-midi-messages"
		)
		COMPREPLY=($(compgen -W "${OPTIONS[*]}" -- "$w0"))
	fi
}

complete -F _relpipe_in_jack_completion relpipe-in-jack