#!/bin/bash

# Stop NPM from complaining about useless stuff.
export npm_config_loglevel=error

# Listen for SIGINT/SIGTERM so the container can be killed with CTRL+C
# Also prevents reboot bug where the container freezes for 30-60 seconds
asyncRun() {
	"$@" &
	pid="$!"
	trap "echo 'Stopping PID $pid'; kill -SIGTERM $pid" SIGINT SIGTERM

	# Signal emitted while waiting will make the wait command return code > 128
	# Wrap it in a loop that doesn't end before the process is indeed stopped
	while kill -0 $pid >/dev/null 2>&1; do
		wait
	done
}

cat <<EOF

888      888888b.            888                                                             
888      888  "88b           888                                                             
888      888  .88P           888                                                             
88888b.  8888888K.   .d88b.  888888                                                          
888 "88b 888  "Y88b d88""88b 888                                                             
888  888 888    888 888  888 888                                                             
888 d88P 888   d88P Y88..88P Y88b.                                                           
88888P"  8888888P"   "Y88P"   "Y888                                                          
                                                                                             
8888888b.                   888               888         .d8888b.  888               888    
888   Y88b                  888               888        d88P  Y88b 888               888    
888    888                  888               888        888    888 888               888    
888   d88P .d88b.   .d8888b 888  888  .d88b.  888888     888        88888b.   8888b.  888888 
8888888P" d88""88b d88P"    888 .88P d8P  Y8b 888        888        888 "88b     "88b 888    
888 T88b  888  888 888      888888K  88888888 888        888    888 888  888 .d888888 888    
888  T88b Y88..88P Y88b.    888 "88b Y8b.     Y88b.  d8b Y88b  d88P 888  888 888  888 Y88b.  
888   T88b "Y88P"   "Y8888P 888  888  "Y8888   "Y888 Y8P  "Y8888P"  888  888 "Y888888  "Y888 

EOF

echo "Your bBot Rocket.Chat Docker container is now starting. Please wait..."

# Check if the Rocket.Chat URL has been set
if [[ -z "${ROCKETCHAT_URL}" ]]; then
	echo "-------------"
  echo "----ERROR----"
  echo "-------------"
	echo "ROCKETCHAT_URL environment variable has not been set."
  echo "Set this to your Rocket.Chat Server URL. e.g."
	echo "ROCKETCHAT_URL=https://bots.rocket.chat"
	echo "-------------"
	echo "Exiting...."
	exit 1
fi

# Check if the Rocket.Chat User has been set
if [[ -z "${ROCKETCHAT_USER}" ]]; then
	echo "-------------"
  echo "----ERROR----"
  echo "-------------"
	echo "ROCKETCHAT_USER environment variable has not been set."
  echo "Set this to the bot account username on your Rocket.Chat server. e.g."
	echo "ROCKETCHAT_USER=brocket"
	echo "-------------"
	echo "Exiting...."
	exit 1
fi

# Check if the Rocket.Chat password has been set
if [[ -z "${ROCKETCHAT_PASSWORD}" ]]; then
	echo "-------------"
  echo "----ERROR----"
  echo "-------------"
	echo "The ROCKETCHAT_PASSWORD Environment Variable has not been set."
  echo "Set this to the bot account password on your Rocket.Chat server. e.g."
	echo "ROCKETCHAT_PASSWORD=supersecret"
	echo "-------------"
	echo "Exiting...."
	exit 1
fi

# Check there's either rooms defined, or the bot is listening to all
if [[ -z "${ROCKETCHAT_ROOM}" ]]; then
  if [[ -z "${LISTEN_ON_ALL_PUBLIC}" ]]; then
    echo "-------------"
    echo "----ERROR----"
    echo "-------------"
    echo "Either ROCKETCHAT_ROOM or LISTEN_ON_ALL_PUBLIC need to be defined."
    echo "Without rooms to join, if it's not listening on all public rooms,"
    echo "the bot won't receive any messages to respond to. e.g."
    echo "ROCKETCHAT_ROOM=general,my-private-room"
    echo "or"
    echo "LISTEN_ON_ALL_PUBLIC=true"
    echo "-------------"
    echo "Exiting...."
    exit 1
  fi
fi

# Install any required deps.
cd /home/bbot/

# Allow using custom registry for node modules
if [[ -z "${NPM_REGISTRY}" ]]; then
  echo "INFO: The NPM_REGISTRY environment variable has not been set."
  echo "INFO: Using npmjs as the default."
else 
  echo "INFO: The NPM_REGISTRY environment variable is $NPM_REGISTRY."
  echo "INFO: NPM will use this registry to pull packages from."
  npm set registry $NPM_REGISTRY
fi

# This happens here as well as during the container build process.
# This is insurance that no dependencies were missed.
# If node_modules externally mounted, insures the base deps are there.
echo "INFO: Attempting to install this containers dependancies"
npm install --no-audit

# Report information about optional behviour environment variables
if [[ -z "${RESPOND_TO_DM}" ]]; then
	echo "-------------"
	echo "INFO: The RESPOND_TO_DM environment variable has not been set."
	echo "INFO: Set RESPOND_TO_DM=true to respond to direct messages."
  echo "Default: RESPOND_TO_DM=false"
	echo "-------------"
fi
if [[ -z "${RESPOND_TO_EDITED}" ]]; then
	echo "-------------"
	echo "INFO: The RESPOND_TO_EDITED environment varialbe is not set."
	echo "INFO: Set RESPOND_TO_EDITED=true to respond to messages after edits."
  echo "Default: RESPOND_TO_EDITED=false"
	echo "-------------"
fi
if [[ -z "${RESPOND_TO_LIVECHAT}" ]]; then
	echo "-------------"
	echo "INFO: The RESPOND_TO_LIVECHAT environment varialbe is not set."
	echo "INFO: Set RESPOND_TO_LIVECHAT=true to respond to livechat messages."
  echo "Default: RESPOND_TO_LIVECHAT=false"
	echo "-------------"
fi

set -e

export PATH="node_modules/.bin:node_modules/bbot/node_modules/.bin:$PATH"

# Start bBot using the asyncRun function
asyncRun node index.js "$@"