#! /bin/bash

notes() (
	ids() {
		_recurse_ids "" "$(_tree)"
	}

	_tree() {
      local cache_key="notes cache _tree"
      if cache get "$cache_key"; then
         return 0
      fi
      __tree "$@" | cache put "$cache_key"
	}

	__tree() {
		_nncurl $NOTES_ADDR/api/v0/tree
	}

	_nncurl() {
		curl -sS "$@"
	}

	_recurse_ids() {
		local prefix="$1"
		local json="$2"
		if echo "$json" | jq .Branches | grep -q ^null$; then
			return 0
		fi
		local b64lines="$(echo "$json" | jq -r '.Branches | keys[]' | base64)"
		if [ -z "$b64lines" ]; then
			return 0
		fi
		for line in $b64lines; do
			line="$(echo "$line" | base64 --decode)"
			local subfix="$(printf "%s/%s" "$prefix" "$line")"
			subfix="${subfix#/}"
			if ! _is_deleted "$subfix"; then
				echo "$subfix"
			fi
			_recurse_ids "$subfix" "$(echo "$json" | jq ".Branches.$line")"
		done
	}

   meta() {
		local id="$1"
		id="${id//\//.Branches.}"
		_tree | jq -c ".Branches.$id.Leaf"
   }

   _is_deleted() {
		local id="$1"
		while [ -n "$id" ]; do
			if meta "$id" | jq .Deleted | grep -q true; then
				return 0
			fi
			if [ "$id" == "${id%/*}" ]; then
				return 1
			fi
			id="${id%/*}"
		done
		return 1
   }

   get() {
      local cache_key="notes cache $1"
      if cache get "$cache_key"; then
         return 0
      fi
      _get "$@" | cache put "$cache_key"
   }

   _get() {
      _nncurl $NOTES_ADDR/api/v0/files/$1
   }

   put() {
      set -u
      local ret=0
      if ! _put "$@"; then
         ret=1
      fi
      set +u
      return $ret
   }

   _put() {
		local id="$1"
		local title="$2"
		local body="$3"
      echo "$body" | _nncurl \
         -X PUT \
			-H "Title: $title" \
         -d @- \
         $NOTES_ADDR/api/v0/files/$id
   }

   "$@"
)