csc

#!/usr/bin/env -S zsh --interactive --login

set -eo pipefail

search() {
  local DEP=""
  local CS_PREFIX="cs complete-dep"

  # Returns two lines:
  # 1) fzf query
  # 2) selected element
  local SEARCH_RESULT=`FZF_DEFAULT_COMMAND="$CS_PREFIX '$DEP'" fzf --bind "change:reload:$CS_PREFIX {q} || true" --phony --query "$DEP" --print-query --tac --ansi`
  local QUERY="$(echo "$SEARCH_RESULT" | head --lines 1)"
  local ANSWER="$(echo "$SEARCH_RESULT" | tail --lines 1)"
  local RESULT=""

  if [[ "$QUERY" == *"$ANSWER" ]]; then
    # In case if query is 'io.circe:circe-core_3' and selected element is 'circe-core_3'.
    RESULT="$QUERY"
  else
    RESULT=`echo "$QUERY:$ANSWER" | sed 's/::/:/g'` # In case if QUERY ends with ':'
  fi

  echo -n "$RESULT"
}

deps() {
  cs resolve "$1"
}

depstree() {
  cs resolve --tree "$1"
}

print_help() {
  TAB="$(printf '\t')"
  /usr/bin/cat << EOF
Usage: csc OPTION

Requirements:
${TAB} - Natively installed 'coursier' as 'cs': https://get-coursier.io/docs/cli-installation#native-launcher
${TAB} - 'fzf': https://github.com/junegunn/fzf
${TAB} - 'zsh': https://www.zsh.org/

Options:
${TAB}--help${TAB}${TAB}print this help
${TAB}find${TAB}${TAB}interactively find a library
${TAB}deps${TAB}${TAB}interactively find a library and show its dependencies
${TAB}depstree${TAB}interactively find a library and show its dependencies as a tree
EOF
}

case "$1" in
  "--help")
    print_help
    ;;
  "find")
    search
    ;;
  "deps")
    deps "$(search)"
    ;;
  "depstree")
    depstree "$(search)"
    ;;
  *)
    print_help
    ;;
esac