# 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_ini_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"
	)

	# TODO: introspection: after moving to alt2xml the available options and their values should be provided by the parser

	PARSER_OPTIONS=(
		"allow-line-continuation-with-escaping"
		"allow-line-continuation-with-space"
		"trim-continuing-lines"
		"allow-sections"
		"allow-section-tags"
		"allow-sub-keys"
		"comment-separators"
		"key-value-separators"
		"quotes"
		"dialect"
		"unescape-basic"
		"unescape-java-properties"
		"unescape-backspace"
	);

	DIALECTS=(
		"java-properties"
		"java-manifest-mf"
	);

	if   [[ "$w1" == "--relation"                      && "x$w0" == "x" ]];    then COMPREPLY=("''")
	elif [[ "$w1" == "--enable-sections"                                ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
	elif [[ "$w1" == "--enable-sub-keys"                                ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
	elif [[ "$w1" == "--enable-comments"                                ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
	elif [[ "$w1" == "--enable-whitespace"                              ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
	elif [[ "$w1" == "--enable-line-numbers"                            ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
	elif [[ "$w1" == "--enable-event-numbers"                           ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
	elif [[ "$w1" == "--parser-option"                                  ]];    then COMPREPLY=($(compgen -W "${PARSER_OPTIONS[*]}" -- "$w0"))
	elif [[ "$w2" == "--parser-option" && "$w1" == "allow-line-continuation-with-escaping"    ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
	elif [[ "$w2" == "--parser-option" && "$w1" == "allow-line-continuation-with-space"       ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
	elif [[ "$w2" == "--parser-option" && "$w1" == "trim-continuing-lines"                    ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
	elif [[ "$w2" == "--parser-option" && "$w1" == "allow-sections"                           ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
	elif [[ "$w2" == "--parser-option" && "$w1" == "allow-section-tags"                       ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
	elif [[ "$w2" == "--parser-option" && "$w1" == "allow-sub-keys"                           ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
	elif [[ "$w2" == "--parser-option" && "$w1" == "unescape-basic"                           ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
	elif [[ "$w2" == "--parser-option" && "$w1" == "unescape-java-properties"                 ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
	elif [[ "$w2" == "--parser-option" && "$w1" == "unescape-backspace"                       ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
	elif [[ "$w2" == "--parser-option" && "$w1" == "dialect"                                  ]];    then COMPREPLY=($(compgen -W "${DIALECTS[*]}" -- "$w0"))
	elif [[ "$w2" == "--parser-option" && "$w1" == "comment-separators"      && "x$w0" == "x" ]];    then COMPREPLY=("'#;'")
	elif [[ "$w2" == "--parser-option" && "$w1" == "key-value-separators"    && "x$w0" == "x" ]];    then COMPREPLY=("'=:'")
	elif [[ "$w2" == "--parser-option" && "$w1" == "quotes"                  && "x$w0" == "x" ]];    then COMPREPLY=("\$'\"\\''")
	else
		OPTIONS=(
			"--relation"
			"--enable-sections"
			"--enable-sub-keys"
			"--enable-comments"
			"--enable-whitespace"
			"--enable-line-numbers"
			"--enable-event-numbers"
			"--parser-option"
		)
		COMPREPLY=($(compgen -W "${OPTIONS[*]}" -- "$w0"))
	fi
}

complete -F _relpipe_in_ini_completion relpipe-in-ini