# GStreamer
# Copyright (C) 2015 Mathieu Duponchelle <mathieu.duponchelle@opencreed.com>
#
# bash/zsh completion support for ges-launch
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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
# Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
# Boston, MA 02110-1301, USA.

HELPERDIR="${BASH_SOURCE[0]%/*}/../helpers"

if [[ ! -d "$HELPERDIR" ]]; then
	HELPERDIR="$(pkg-config --variable=helpersdir gstreamer-1.0)"
else
	HELPERDIR=`cd "$HELPERDIR"; pwd`
fi

# Common definitions
. "$HELPERDIR"/gst

HELPER="$HELPERDIR/gst-completion-helper-1.0"

_ges___inspect_action_type ()
{
	COMPREPLY=( $(compgen -W "$(ges-launch-1.0 --inspect-action-type | grep '^[^ ]' | cut -d':' -f2)" -- $cur) )
}

_ges___track_types ()
{
	COMPREPLY=( $(compgen -W "audio video audio+video" -- $cur) )
}

_ges___set_scenario () {
	COMPREPLY=( $(compgen -W "*.scenario $(gst-validate-1.0 -l | awk '$0=$2' FS=[ RS=])" -- $cur) )
}

_ges___load () {
	COMPREPLY=( $(compgen -W "*.xges" -- $cur) )
}

_ges___outputuri () {
	COMPREPLY=( $(compgen -W "file://" -- $cur) )
}

_ges___audiosink () {
	COMPREPLY=( $(compgen -W "$($HELPER --klass=Sink --sinkcaps='audio/x-raw')" -- $cur) )
}

_ges___videosink () {
	COMPREPLY=( $(compgen -W "$($HELPER --klass=Sink --sinkcaps='video/x-raw')" -- $cur) )
}

_ges_clip () {
	if [[ "$prev" == "$command" ]];
	then
		_gst_mandatory_argument
	else
		COMPREPLY=( $(compgen -W "duration= inpoint= start= layer= $(ges-launch-1.0 help all | egrep '^  +')" -- $cur) )
	fi
}

_ges_test_clip () {
	if [[ "$prev" == "$command" ]];
	then
		_gst_mandatory_argument
	else
		COMPREPLY=( $(compgen -W "duration= inpoint= start= layer= $(ges-launch-1.0 help all | egrep '^  +')" -- $cur) )
	fi
}

_ges_effect () {
	if [[ "$prev" == "$command" ]];
	then
		_gst_mandatory_argument
	else
		COMPREPLY=( $(compgen -W "duration= start= layer= $(ges-launch-1.0 help all | egrep '^  +')" -- $cur) )
	fi
}

_ges_list_options () {
	COMPREPLY=( $(compgen -W "$(ges-launch-1.0 --help-all | grep -oh '[[:graph:]]*--[[:graph:]]*' | cut -d'=' -f1)" -- $cur) )
}

_ges_list_commands () {
	COMPREPLY=( $(compgen -W "$(ges-launch-1.0 help all | egrep '^  +')" -- $cur) )
}

_ges_list_properties () {
	local props

	if [[ "$real_command" == "" ]]
	then
		_gst_mandatory_argument
	elif [[ "$real_command" == "+clip" ]]
	then
		COMPREPLY=( $(compgen -W "set-alpha set-posx set-posy set-width set-height set-volume set-mute" -- $cur) )
	elif [[ "$real_command" == "+test-clip" ]]
	then
		COMPREPLY=( $(compgen -W "set-alpha set-posx set-posy set-width set-height set-volume set-mute" -- $cur) )
	elif [[ "$real_command" == "+effect" ]]
	then
		COMPREPLY=()
		effect_bin_description="${effect_bin_description//\"/ }"
		array=(${effect_bin_description//!/ })
		for i in "${array[@]}"; do
			props=("$($HELPER --element-properties $i)")
			for j in $props; do
				j="${j//=/ }"
				COMPREPLY+=( $(compgen -W "set-$j" -- $cur) )
			done
		done
	else
		_gst_mandatory_argument
	fi
}

_ges___exclude_ () { _gst_mandatory_argument; }
_ges___encoding_profile () { _gst_mandatory_argument; }
_ges___ges_sample_path () { _gst_mandatory_argument; }
_ges___ges_sample_path_recurse () { _gst_mandatory_argument; }
_ges___thumbnail () { _gst_mandatory_argument; }
_ges___repeat () { _gst_mandatory_argument; }
_ges___save () { _gst_mandatory_argument; }

containsElement () {
	local e
	for e in "${@:2}";
	do
		[[ "$e" == "$1" ]] && return 0;
	done
	return 1
}

__ges_main ()
{
	local i=1 c=1 command function_exists completion_func commands real_command effect_bin_description

	commands=($(ges-launch-1.0 help all | egrep '^  +'))
	real_command=""
	effect_bin_description=""

	if [[ "$cur" == "=" ]]; then
		_gst_mandatory_argument
		return
	fi

	while [[ $i -ne $COMP_CWORD ]];
		do
			local var
			var="${COMP_WORDS[i]}"
			if [[ "$var" == "--"* ]]
			then
				command="$var"
			elif containsElement "$var" "${commands[@]}";
			then
				real_command="$var"
				command="$var"
				if [[ "$var" == "+effect" ]]
				then
					effect_bin_description="${COMP_WORDS[i+1]}"
				fi
			fi
		i=$[$i+1]
		done

	if [[ "$command" == "--gst"* ]]; then
		completion_func="_${command//-/_}"
	else
		completion_func="_ges_${command//-/_}"
		completion_func="${completion_func//+/}"
	fi

	declare -f $completion_func >/dev/null 2>&1

	function_exists=$?

	if [[ "$cur" == "-"* ]]; then
		_ges_list_options
	elif [[ "$cur" == "+"* ]]; then
		_ges_list_commands
	elif [[ "$cur" == "="* ]]
	then
		_gst_mandatory_argument
	elif [[ "$cur" == "set-"* ]]
	then
		_ges_list_properties
	elif [ $function_exists -eq 0 ]
	then
		$completion_func
	else
		_ges_list_commands
	fi
}

__ges_func_wrap ()
{
	local cur prev
	cur="${COMP_WORDS[COMP_CWORD]}"
	prev="${COMP_WORDS[COMP_CWORD-1]}"
	$1
}

# Setup completion for certain functions defined above by setting common
# variables and workarounds.
# This is NOT a public function; use at your own risk.
__ges_complete ()
{
	local wrapper="__ges_wrap${2}"
	eval "$wrapper () { __ges_func_wrap $2 ; }"
	complete -o bashdefault -o default -o nospace -F $wrapper $1 2>/dev/null \
		|| complete -o default -o nospace -F $wrapper $1
}

_ges ()
{
	__ges_wrap__ges_main
}

__ges_complete ges-launch-1.0 __ges_main