mxcolr

#!/bin/bash

### FLAGS ##############################
set -o noclobber # Avoid overlay files
set -o errexit   # Avoid cascading errors
set -o pipefail  # Unveil hidden failures
set -o nounset   # Expose unset variables
set -o errtrace  # Trace error LINENO

trap 'echo Error at $LINENO' ERR

### PRE CHECKS #########################
if ! command -v pastel &> /dev/null; then
  echo "pastel not found."
  echo " ==> https://github.com/sharkdp/pastel#installation"
  exit 1
fi

if ! command -v bc &> /dev/null; then
  echo "bc not found."
  echo " ==> https://www.gnu.org/software/bc"
  exit 1
fi
echo ---

### VARIABLES ##########################
INTERACTIVE=0
STRATEGY=vivid
BASE_PATH=$(dirname "$(realpath "$0")")

### ARGUMENTS ##########################
usage() { echo "Usage: $0 [-s <vivid|lch>] [-i]" 1>&2; exit 1; }

while getopts "is:" o; do
  case "${o}" in
    s)
      STRATEGY=${OPTARG:-vivid}
      [[ $STRATEGY == "vivid" || $STRATEGY == "lch" ]] || usage
      [ $STRATEGY == 'lch' ] && STRATEGY=lch_hue
      ;;
    i) INTERACTIVE=1 ;;
    *) STRATEGY=vivid ;;
  esac
done
shift $((OPTIND-1))

### SOURCE #############################
for src in $BASE_PATH/src/*.sh; do . "$src"; done

### START ##############################
main () {
  generate_seed
  generate_palette
  generate_shade
  save
  save_preview_terminal
  demo

  if (( "$INTERACTIVE" )); then
    prompt_menu
    case $REPLY in
      n) main ;;
      u) save; plugins_apply ;;
      *) demo_full ;;
    esac
  else
    prompt_confirm && save && plugins_apply
  fi
}

main