#!/usr/bin/env bash
readonly dependency=("chriskempson/base16-shell")
readonly app="ansi-shell"

path="$1"
package="$2"
theme="$3"
# permanent="$4"

## Main Entrypoint
#
#  Finds the right theme template file and starts theme
#  switching and, if necessary, permanent setting processes.
main() {
  dbg_msg $app "Starting Processor"
  tfile="$path/$package/scripts/base16-$theme.sh"

  if ! file_exists "$tfile"; then
    dbg_msg $app "error" "Theme template $theme not found in package $package"
    exit 1
  fi

  # not implemented
  # if [[ "$permanent" == "true" ]]; then save; fi
  theme

  dbg_msg $app "Processor Done"
}

## Theme switcher
#
#  Makes sure that if any application instance is
#  currently running, it switches to new theme.
theme() {
  dbg_msg $app "Switching theme"
  # source "$tfile" -- works, but only for current terminal
  # ANSI solution from: https://www.reddit.com/r/unixporn/comments/80nidw/bspwm_script_to_change_all_themes_on_demand/duxjw1e/
  # only we can make use of kempson's scripts and send them to all terminals, so we don't have to manually
  # sed the colors like sed -nE 's/^(color[0-9|_foreground|_background]+)="(.+)".*$/\1,\2/gp' $tfile
  for term in /dev/pts/[0-9]*; do
    # shellcheck source=/dev/null
    source "$tfile" >"$term"
  done
  dbg_msg $app "Successfully switched theme"
}

### Theme setter
##
##  Takes care of permanently writing the desired
##  base16 theme into application settings.
#save() {
#  dbg_msg $app "Saving theme"
#  # saveroo
#  dbg_msg $app "Sucessfully Saved theme"
#}

### Theme includer
##
##  Makes sure that theme is actually included in
##  default application startup routine.
##  This is the most invasive step of theming since it
##  rewrites within existing configuration files.
#include() {
#  dbg_msg $app "Including theme in configuration"
#  # includeroo
#  dbg_msg $app "Sucessfully included theme"
#}

# Safe sourcing: https://stackoverflow.com/a/12694189
DIR="${BASH_SOURCE%/*}"
if [[ ! -d "$DIR" ]]; then DIR="$PWD"; fi
# shellcheck source=utilities.sh
. "$DIR/utilities.sh"
## Dependency Checker
#
#  Makes sure the processor is called for the correct
#  base16 package, or refuses to run if it is not.
if printf '%s\n' "${dependency[@]}" | grep -q -P "^$package$"; then
  main
else
  dbg_msg $app "error" "Processor does not work for package $package"
fi