#!/bin/bash
set -eo pipefail

platform="Linux" # Assumed
uname=$(uname)
case $uname in
	"Darwin")
	platform="MacOS / OSX"
	;;
	MINGW*)
	platform="Windows"
	;;
esac

if [[ $platform = "Windows" ]]; then
	export COMPOSE_CONVERT_WINDOWS_PATHS=1
fi

usage(){
  echo "Usage: $0 <command> [options]"
  echo
  echo "This program helps to manage the setup/teardown of the docker containers for running WebODM. We recommend that you read the full documentation of docker at https://docs.docker.com if you want to customize your setup."
  echo 
  echo "Command list:"
  echo "	start		Start WebODM"
  echo "	stop		Stop WebODM"
  echo "	update		Update WebODM to the latest release"
  echo "	rebuild		Rebuild all docker containers and perform cleanups"
  echo "	checkenv	Do an environment check and install missing components"
  exit
}

# $1 = command | $2 = help_text | $3 = install_command (optional)
check_command(){
	check_msg_prefix="Checking for $1... "
	check_msg_result="\033[92m\033[1m OK\033[0m\033[39m"

	hash $1 2>/dev/null || not_found=true 
	if [[ $not_found ]]; then
		
		# Can we attempt to install it?
		if [[ ! -z "$3" ]]; then
			echo -e "$check_msg_prefix \033[93mnot found, we'll attempt to install\033[39m"
			run "$3 || sudo $3"

			# Recurse, but don't pass the install command
			check_command "$1" "$2"	
		else
			check_msg_result="\033[91m can't find $1! Check that the program is installed and that you have added the proper path to the program to your PATH environment variable before launching WebODM. If you change your PATH environment variable, remember to close and reopen your terminal. $2\033[39m"
		fi
	fi

	echo -e "$check_msg_prefix $check_msg_result"
	if [[ $not_found ]]; then
		return 1
	fi
}

environment_check(){
	check_command "docker" "https://www.docker.com/"
	check_command "git" "https://git-scm.com/downloads"
	check_command "python" "https://www.python.org/downloads/"
	check_command "pip" "Run \033[1msudo easy_install pip\033[0m" "easy_install pip"
	check_command "docker-compose" "Run \033[1mpip install docker-compose\033[0m" "pip install docker-compose"
}

run(){
	echo $1
	eval $1
}

start(){
	run "docker-compose -f docker-compose.yml -f docker-compose.nodeodm.yml up"
}

rebuild(){
	run "docker-compose down"
	run "rm -fr node_modules/ || sudo rm -fr node_modules/"
	run "rm -fr nodeodm/external/node-OpenDroneMap || sudo rm -fr nodeodm/external/node-OpenDroneMap"
	run "docker-compose build --no-cache"
	echo -e "\033[1mDone!\033[0m You can now start WebODM by running $0 start"
}

if [[ $1 = "start" ]]; then
	environment_check
	echo "Starting WebODM..."
	start
elif [[ $1 = "stop" ]]; then
	environment_check
	echo "Stopping WebODM..."
	run "docker-compose down"
elif [[ $1 = "rebuild" ]]; then
	environment_check
	echo  "Rebuilding WebODM..."
	rebuild
elif [[ $1 = "update" ]]; then
	echo "Updating WebODM..."
	run "git pull origin master"
	run "docker pull opendronemap/node-opendronemap"
	rebuild
elif [[ $1 = "checkenv" ]]; then
	environment_check
else
	usage
fi