#!/bin/bash

#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#  http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
#

# This script facilitates setting up brooklyn.properties
# and launching the brooklyn server or the br client as appropriate

# some words/actions treated specially:

# --help shows help on this tool
# --username and --password set up brooklyn.properties
# <id:cred@location> parsed as location and --application appended (if application set?)
# <word> (not starting with -) passed as command to brooklyn along with everything that follows
# anything else (blank or options starting -) passed as args to brooklyn launch

function help() {
  echo
  # BROOKLYN_VERSION_BELOW
  echo 'Apache Brooklyn 1.0.0-SNAPSHOT convenience launcher'${application:+" for ${application}"}
  echo
  echo 'Usage:  [OPTIONS] [--help | LOCATION | COMMAND] [ARGS]'
  echo
  echo 'The main argument can be any of:'
  echo '  --help                                   display this help (or use `help` to show brooklyn help)'
  if [ -n "$application" ] ; then
    echo '  LOCATION                                 location to launch '${application:-}', in form ID:CRED@CLOUD'
  else
    echo '  LOCATION                                 location to launch APP (requires `--application APP`), in form ID:CRED@CLOUD'
  fi
  echo '  COMMAND                                  command to pass to `brooklyn`, default `launch`'
  echo
  echo 'If no main argument is specified, `brooklyn launch` is used to start Apache Brooklyn.'
  echo 'ARGS are passed to the resulting `brooklyn` command. Other OPTIONS available are:'
  echo '  [ --username USER ] --password PASS      set the default [username and] password'
  echo '  [ --debug ]                              show additional debug info'
  if [ -n "$application" ] ; then
    echo '  [ --application APP ]                    override the default application to launch ('${application}')'
  else
    echo '  [ --application APP ]                    specify a default application to launch'
  fi
  echo
}

function make_brooklyn_properties() {
  if [ -n "${brooklyn_properties}" ] ; then return ; fi
  echo
  echo Configuring brooklyn.properties...
  export brooklyn_properties=~/.brooklyn/brooklyn.properties
  mkdir -p `dirname ${brooklyn_properties}`
  touch ${brooklyn_properties}
  chmod 600 ${brooklyn_properties}
}

if [ -f brooklyn-docker-start.opts ] ; then
  . ./brooklyn-docker-start.opts
fi

while [ -n "$1" ] ; do
  case "$1" in

    --help)
      help
      exit 0
      ;;

    --username | --password | --application)
      if [ -z "$2" ] ; then
        echo ERROR: $1 requires an argument following it
        exit 255
      fi

      export ${1#--}=$2
      shift 2
      continue
      ;;

    --debug)
      export ${1#--}=true
      shift
      continue
      ;;

    *:*@*)
      if [ -z "$application" ] ; then
        # environment does not support location syntax
        break
      fi

      location=$1
      shift
      break
      ;;

    -*)
      break
      ;;

    *)
      command=$1
      shift
      break
      ;;

  esac
done

if [ -n "$debug" ] ; then
  set -x   # echo all commands
fi

if [ -n "$password" ] ; then
  make_brooklyn_properties
  echo brooklyn.webconsole.security.users=${username:-brooklyn} >> ${brooklyn_properties}
  echo brooklyn.webconsole.security.user.${username:-brooklyn}.password=${password} >> ${brooklyn_properties}
  # and set up the config file for `br` so it works
  echo '{"auth":{"http://localhost:8081":{"password":"'${password}'","username":"'${username:-brooklyn}'"}},"skipSslChecks":false,"target":"http://localhost:8081"}}' > ~/.brooklyn_cli

  echo Created user ${username:-brooklyn} and given password

elif [ -n "$username" ] ; then
  echo ERROR: password must be specified if providing a username
  exit 255
fi


if [ ! -f ~/.ssh/id_rsa ] ; then
  echo
  echo Creating ssh key to access remote machines...
  mkdir -p ~/.ssh/
  chmod 700 ~/.ssh/
  if [ -n "$debug" ] ; then
    ssh-keygen -f ~/.ssh/id_rsa -P ""
  else
    ssh-keygen -f ~/.ssh/id_rsa -P "" > ~/.ssh/id_rsa.log 2> ~/.ssh/id_rsa.log2
  fi

  cat ~/.ssh/id_rsa
fi


ARGS=(${command:-launch} $@)

if [[ -n "$application" && -n "$location" ]] ; then 
  echo
  echo Launching blueprint...
  creds=${location/@*/}
  cat > initial.yaml << EOF
name: $application

services:
- type: $application

location:
  ${location/*@/}:
    identity: ${creds/:*/}
    credential: ${creds/*:/}
EOF
  cat initial.yaml | sed 's/\(.*credential:\).*/\1 <suppressed>/'
  ARGS+=(--app file://`pwd -P`/initial.yaml)
fi

# launch brooklyn
echo
echo Launching '`'brooklyn "${ARGS[@]}"'`'...

. bin/brooklyn "${ARGS[@]}"