# ShaderShark
# Copyright © 2023 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/>.

_shader_shark_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]}

	local COLOR=(
		"333333"
		"345678"
		"147258"
	)

	local SHADER_TYPE=(
		"vertex"
		"fragment"
	)

	if   [[ "$w1" == "--texture" ]]; then
		COMPREPLY=($(compgen -f -- "$w0"; compgen -d -S / -- "$w0"))
	elif [[ "$w1" == "--shader" ]]; then
		COMPREPLY=($(compgen -W "${SHADER_TYPE[*]}" -- "$w0"))
	elif [[ "$w2" == "--shader" ]]; then
		COMPREPLY=($(compgen -f -- "$w0"; compgen -d -S / -- "$w0"))
	elif [[ "$w1" == "--background-color" ]]; then
		COMPREPLY=($(compgen -W "${COLOR[*]}" -- "$w0"))
	else
		local OPTIONS=(
			"--texture"
			"--shader"
			"--background-color"
			"--root-window"
		)
		COMPREPLY=($(compgen -W "${OPTIONS[*]}" -- "$w0"))
	fi
}

complete -F _shader_shark_completion shader-shark