#!/usr/bin/env sh

if [ $# -lt 1 ] || [ "$1" == "help" ] || [ "$1" == "h" ]
then
    echo "usage: $0 (help|status|clean|run|logs) [container-name]"
    echo "  help   - print this message"
    echo "  status - report whether a container named container-name can be found, and whether or not it is running"
    echo "  clean  - kill and remove any existing containers matching container-name"
    echo "  run    - kill and remove any existing containers matching container-name, build the current directory into a new image, and deploy a new container container-name"
    echo "  logs   - tail the logs of the container named container-name, equivalent to docker logs -f container-name"
    echo "  container-name defaults to rollbot3-instance"
    echo "  Run as root to ensure docker can be used, or set FORCE_NOROOT=* to force the script to run anyway."
    exit 1
fi

if [ "$EUID" -ne 0 ] && [ -z "$FORCE_NOROOT" ]
then
    echo "$0 must be run as root to use docker. Set FORCE_NOROOT=* to force the script to run anyway."
    exit 1
fi

if [ $# -gt 1 ]
then
    CONTAINER_NAME=$2
else
    CONTAINER_NAME="rollbot3-instance"
fi

status_check() {
    docker inspect -f '{{.State.Running}}' $CONTAINER_NAME 2> /dev/null
}

clean_container() {
    STATUS=$(status_check)
    if [ "$STATUS" = "true" ]
    then
        echo "Container $CONTAINER_NAME is running and will be stopped and removed."
        docker kill $CONTAINER_NAME
        docker rm $CONTAINER_NAME
    elif [ "$STATUS" = "false" ]
    then
        echo "Container $CONTAINER_NAME is stopped and will be removed."
        docker rm $CONTAINER_NAME
    else
        echo "No existing container $CONTAINER_NAME could be found, no cleanup will be performed."
    fi
}

case $1 in
    "l"|"logs")
        STATUS=$(status_check)
        if [ "$STATUS" = "true" ] || [ "$STATUS" = "false" ]
        then
            docker logs -f $CONTAINER_NAME
        else
            echo "No existing container $CONTAINER_NAME could be found."
        fi
    ;;
    "r"|"run")
        clean_container
        echo "Building rollbot3 image as rollbot3:latest"
        docker build -t rollbot3:latest .
        echo "Executing new container $CONTAINER_NAME using rollbot3:latest"
        docker run -p6070:6070 -v ./config:/rollbot-config --name $CONTAINER_NAME -d rollbot3
        echo "Rollbot endpoint accessible at http://localhost:6070/rollbot"
    ;;
    "c"|"clean")
        clean_container
    ;;
    "s"|"status")
        STATUS=$(status_check)
        if [ "$STATUS" = "true" ]
        then
            echo "Existing container $CONTAINER_NAME is running."
        elif [ "$STATUS" = "false" ]
        then
            echo "Existing container $CONTAINER_NAME is stopped."
        else
            echo "No existing container $CONTAINER_NAME could be found."
        fi
    ;;
    *)
        echo "Unknown option $1, must be one of help, status, clean, run, logs."
        exit 1
    ;;
esac