#!/usr/bin/env bash

# Define associative array
declare -A apps=()

# Utility methods
# -> Checking
function is_binary() {
 if ! which "${1}" &>/dev/null; then
  return 1
 else
  return 0
 fi
}
function is_file() {
 if [ ! -f "${1}" ]; then
  return 1
 else
  return 0
 fi
}
function is_not_file() {
 if [ -f "${1}" ]; then
  return 1
 else
  return 0
 fi
}
function is_flatpak() {
 if ! flatpak info "${1}" &>/dev/null; then
  return 1
 else
  return 0
 fi
}
# -> Adding
function add_app() {
 apps+=( ["${1}"]="${2}" )
}
function add_binary() {
 is_binary "${2}" && add_app "${1}" "${2}"
}
function add_file() {
 is_file "${2}" && add_app "${1}" "${2}"
}
function add_flatpak() {
 is_flatpak "${2}" && add_app "${1}" "flatpak run ${2}"
}

if [ -f "/tmp/launch-menu-apps_appcache.tmp" ]; then
	# Load cache
	echo ":: Loading cache"
	chmod +x "/tmp/launch-menu-apps_appcache.tmp"
	source "/tmp/launch-menu-apps_appcache.tmp"
else
	# Create template
	[[ ! -d "${HOME:?}/.config/launch-menu-apps.d" ]] && (
		echo ":: Creating template script"
		mkdir -p "${HOME}/.config/launch-menu-apps.d"
		cat << EOF >> "${HOME}/.config/launch-menu-apps.d/template.sh.disabled"
#!/usr/bin/env bash

apps+=(	
 ["Example application"]="example-application"
 ["Test script"]="${HOME}/.local/bin/test-script"
)
EOF
	)
	
	# Do nothing if no scripts could be found to source
	# shellcheck disable=SC2012
	[[ "$(ls -1 "${HOME}"/.config/launch-menu-apps.d/*.sh 2>/dev/null | wc -l)" == "0" ]] && exit 0
	
	# Append entries by sourcing all scripts
	for script in "${HOME}"/.config/launch-menu-apps.d/*.sh; do
	 echo ":: Sourcing script ${script}"
	 # shellcheck disable=SC1090
	 source "${script}"
	done
	
	# Enable failure detection
	# Enabling this before sourcing all scripts will
	# cause issues, that's why we're doing it here.
	set -eo pipefail
	
	# Cache entries
	echo ":: Caching entries"
	echo "apps+=(" > /tmp/launch-menu-apps_appcache.tmp
	for app in "${!apps[@]}"; do
	 echo " [\"${app}\"]=\"${apps[${app}]}\"" >> /tmp/launch-menu-apps_appcache.tmp
	done
	echo ")" >> /tmp/launch-menu-apps_appcache.tmp
fi

# Sort entries
if [ -n "${MENU_SORT}" ]; then
	echo ":: Sorting entries"
	echo ":: Warning: Sorting is currently broken and is considered experimental"
	
	declare -a apps_sorted=($(
		for app in "${!apps[@]}"; do
			echo "[\"${key}\"]=${apps[${app}]}"
		done | sort
	))
	
	unset apps
	declare -A apps=()
	for app in "${!apps_sorted[@]}"; do
		key=$(echo -n "${apps_sorted[${app}]}" | grep -o '\["[A-Za-z]+"\]' || true)
		value=$(echo -n "${apps_sorted[${app}]}" | grep -o '"[A-Za-z]+"' || true)
		echo ":: COPY BSE: ${apps_sorted[@]}"
		echo "::      KEY: ${key}"
		echo "        VAL: ${value}"
		
		apps+=(
			["${app}"]="${apps_sorted[${app}]}"
		)
	done
fi

# Create new variables
apps_keys=
for app in "${!apps[@]}"; do
	if [ -n "${MENU_SORT}" ]; then
		echo ":: KEYC KEY: ${app}"
		echo "        VAL: ${apps[${app}]}"
	fi
	[[ -n "${apps_keys}" ]] && apps_keys="${apps_keys}\n"
	apps_keys=${apps_keys}${app}
done

# Make selection
echo ":: Invoking 'launch-menu'"
selection=$(echo -e "${apps_keys}" | ${HOME}/.local/bin/launch-menu "start")

# Terminate if no selection was made
[ -z "${selection}" ] && exit 0

# Execute
echo ":: Executing"
# shellcheck disable=SC2086
( eval ${apps[${selection}]} )