#! /bin/bash -e
# Provision an AWS cloud instance with tutor.
# Run with: curl -sSL https://raw.githubusercontent.com/overhangio/tutor/master/cloud/aws.sh | bash -e

export DEBIAN_FRONTEND=noninteractive 

echo "=============== Installing system dependencies"
sudo apt update \
    && sudo apt install -y \
        apt-transport-https \
        ca-certificates \
        curl \
        gnupg-agent \
        software-properties-common

echo "=============== Installing docker"
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"
sudo apt update
sudo apt install -y docker-ce docker-ce-cli containerd.io
sudo usermod -aG docker $USER
sudo su - $USER

echo "=============== Run local docker registry on port 5000"
docker run -d -p 5000:5000 --restart=always --name docker_registry registry:2.7.1

echo "=============== Installing docker-compose"
sudo curl -L "https://github.com/docker/compose/releases/download/1.23.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose

echo "=============== Installing tutor"
export TUTOR_VERSION="$(curl -sSL https://api.github.com/repos/overhangio/tutor/releases/latest | grep tag_name | sed "s/.*tag_name\": \"\(.*\)\",/\1/g")"
sudo curl -L "https://github.com/overhangio/tutor/releases/download/$TUTOR_VERSION/tutor-$(uname -s)_$(uname -m)" -o /usr/local/bin/tutor
sudo chmod +x /usr/local/bin/tutor

echo "=============== Pulling vendor docker images"
tutor config save
tutor images pull elasticsearch
tutor images pull memcached
tutor images pull mongodb
tutor images pull mysql
tutor images pull nginx
tutor images pull rabbitmq
tutor images pull smtp

echo "=============== Tagging vendor docker images"
docker tag $(tutor config printvalue DOCKER_IMAGE_ELASTICSEARCH) localhost:5000/$(tutor config printvalue DOCKER_IMAGE_ELASTICSEARCH)
docker tag $(tutor config printvalue DOCKER_IMAGE_MEMCACHED) localhost:5000/$(tutor config printvalue DOCKER_IMAGE_MEMCACHED)
docker tag $(tutor config printvalue DOCKER_IMAGE_MONGODB) localhost:5000/$(tutor config printvalue DOCKER_IMAGE_MONGODB)
docker tag $(tutor config printvalue DOCKER_IMAGE_MYSQL) localhost:5000/$(tutor config printvalue DOCKER_IMAGE_MYSQL)
docker tag $(tutor config printvalue DOCKER_IMAGE_SMTP) localhost:5000/$(tutor config printvalue DOCKER_IMAGE_SMTP)
docker tag $(tutor config printvalue DOCKER_IMAGE_NGINX) localhost:5000/$(tutor config printvalue DOCKER_IMAGE_NGINX)
docker tag $(tutor config printvalue DOCKER_IMAGE_RABBITMQ) localhost:5000/$(tutor config printvalue DOCKER_IMAGE_RABBITMQ)

echo "=============== Pushing vendor docker images to the local registry"
docker push localhost:5000/$(tutor config printvalue DOCKER_IMAGE_ELASTICSEARCH)
docker push localhost:5000/$(tutor config printvalue DOCKER_IMAGE_MEMCACHED)
docker push localhost:5000/$(tutor config printvalue DOCKER_IMAGE_MONGODB)
docker push localhost:5000/$(tutor config printvalue DOCKER_IMAGE_MYSQL)
docker push localhost:5000/$(tutor config printvalue DOCKER_IMAGE_SMTP)
docker push localhost:5000/$(tutor config printvalue DOCKER_IMAGE_NGINX)
docker push localhost:5000/$(tutor config printvalue DOCKER_IMAGE_RABBITMQ)

echo "=============== Building openedx docker images"
tutor config save --set ACTIVATE_NOTES=true --set ACTIVATE_XQUEUE=true --set DOCKER_REGISTRY=localhost:5000/
tutor images build all

echo "=============== Create Web UI script"
echo '#! /bin/bash
if [ ! -f $(tutor config printroot)/env/webui/config.yml ]; then
    mkdir -p $(tutor config printroot)/env/webui
    tutor webui configure --user tutor --password "$(curl http://169.254.169.254/latest/meta-data/instance-id)"
fi
tutor webui start' | sudo tee /usr/local/bin/tutor-webui
sudo chmod +x /usr/local/bin/tutor-webui

echo "=============== Configuring systemd"
echo "[Unit]
Description=Tutor web UI
After=network.target

[Service]
User=$USER
WorkingDirectory=/home/$USER
Environment=HOME=/home/$USER
Environment=TUTOR_DOCKER_REGISTRY=localhost:5000/
ExecStart=/usr/local/bin/tutor-webui
Restart=on-failure

[Install]
WantedBy=multi-user.target" | sudo tee /etc/systemd/system/tutor-webui.service
sudo systemctl enable tutor-webui

echo "=============== Clean tutor environment, configuration and data"
sudo rm -rf $(tutor config printroot)

echo "=============== Clean authorized keys"
sudo find / -name "authorized_keys" -exec rm -f {} \;

echo "=============== Clean history"
sudo find /root/.*history /home/*/.*history -exec rm -f {} \;