#!/bin/bash
set -e

is_enabled () {
    echo "$1" | grep -q -i -E "^(yes|on|true|1)$"
}

#CODE_PASSWORD
#CODE_PASSWORD_FILE
CODE_UUID="${CODE_UUID:-1001}"
CODE_GUID="${CODE_GUID:-1001}"
CODE_USERNAME=$(getent passwd "$CODE_UUID" | cut -d: -f1)
CODE_GROUPNAME=$(getent group "$CODE_GUID" | cut -d: -f1)
USER_SUDO="${USER_SUDO:-false}"
RUN_DOCKER="${RUN_DOCKER:-true}"
#DOCKER_HOST
#GIT_NAME
#GIT_EMAIL

if [ -f /firstrun ]; then
	echo 'First run of the container. Code will be configured.'
	echo 'If exist, configuration and data will be reused and upgraded as needed.'

	# Configure timezone if needed
	if [ -n "$TZ" ]; then
		cp /usr/share/zoneinfo/$TZ /etc/localtime 
	fi

	# Configure GIT
	if [ "$GIT_NAME" ]; then
  	HOME=/home/code git config --global user.name "$GIT_NAME"
	fi
	if [ "$GIT_EMAIL" ]; then
		HOME=/home/code git config --global user.email "$GIT_EMAIL"
	fi

	# Create code user/group if needed
	if [ -z "$CODE_GROUPNAME" ]; then
		groupadd -r -g "$CODE_GUID" code
		CODE_GROUPNAME="code"
	fi
	if [ -z "$CODE_USERNAME" ]; then
		if [ "$CODE_PASSWORD" ] && [ "$CODE_PASSWORD_FILE" ]; then
			echo 'error: both CODE_PASSWORD and CODE_PASSWORD_FILE are set (but are exclusive)\n'
			exit 1
		fi
		password=""``
		if [ "$CODE_PASSWORD" ]; then
			password="$CODE_PASSWORD"
		elif [ "$CODE_PASSWORD_FILE" ]; then
			password="$(< ${CODE_PASSWORD_FILE})"
		fi

		useradd -r -d /home/code -s /bin/bash -g "$CODE_GUID" -u "$CODE_UUID" -M -N code
		usermod -aG docker code
		echo "code:$password" | chpasswd

		CODE_USERNAME="code"
	else
		usermod -d /home/code "$CODE_USERNAME"
	fi
	chown -R "$CODE_USERNAME":"$CODE_GROUPNAME" /home/code

	# Clean
	rm -rf /firstrun
fi

# Add or remove user from sudo group
if is_enabled "${USER_SUDO}"; then
    groups "$CODE_USERNAME" | tr " " "\n" | grep "^sudo$" || usermod -aG sudo "$CODE_USERNAME"
else
    ! groups "$CODE_USERNAME" | tr " " "\n" | grep "^sudo$" || gpasswd -d "$CODE_USERNAME" sudo
fi

# Link external docker even for dumb tools (ie. Visual Studio Docker extension)
if [ "$RUN_DOCKER" != "true" -a "$DOCKER_HOST" != "unix:///var/run/docker.sock" -a "$DOCKER_HOST" != "" ]; then
	ln -s "${DOCKER_HOST##unix://}" /run/docker.sock
fi

export CODE_USERNAME
export RUN_DOCKER

cd /home/code
exec "$@"