#! /bin/bash

rclone() (
	get_google() {
      local cache_key="rclone get google $*"
      if cache get "$cache_key"; then
         return 0
      fi
      _get_google "$@" | cache put "$cache_key"
	}

	_get_google() {
		_rate_limit
		local id="$1"
		local out="$(mktemp -d)"
		_cmd backend copyid work-notes-google: --drive-export-formats=csv,html,pdf "$id" "$out/"
		find "$out" -type f
	}

	_rate_limit() {
		local f="/tmp/rclone.rate.limit"
		local last=0
		if [ -f "$f" ]; then
			last="$(date -r "$f" +%s)"
		fi
		local now="$(date +%s)"
		local since_last=$((now-last))
		if ((since_last>2)); then
			dur=-2
		fi
		dur=$((dur+2))
		sleep $dur
		touch "$f"
	}

	_ensure() {
		which rclone &> /dev/null && rclone version &> /dev/null
	}

	_cmd() {
		_ensure_google_config
		__cmd "$@"
   }

	__cmd() {
		_ensure
   	RCLONE_CONFIG_PASS="$RCLONE_CONFIG_PASS" \
			$(which rclone) \
   	      --config "$RCLONE_CONFIG" \
   	      --size-only \
   	      --fast-list \
   	      --retries 10 \
   	      --retries-sleep 10s \
   	   "$@"
	}

	_ensure_google_config() {
		__cmd config show | grep -q work-notes-google
	}

	"$@"
)