#!/usr/bin/env bash
# The script is downloaded the AWS image builder Task Orchestrator and Executor (AWSTOE)
# We can't use `user data script` because cloud-init does not check the exit code
# The script is downloaded in the component named ci-infrastructure-prepare in us-east-1
# The link there must be adjusted to a particular RAW link, e.g.
# https://github.com/ClickHouse/ClickHouse/raw/653da5f00219c088af66d97a8f1ea3e35e798268/tests/ci/worker/prepare-ci-ami.sh

set -xeuo pipefail

echo "Running prepare script"
export DEBIAN_FRONTEND=noninteractive
export RUNNER_VERSION=2.317.0
export RUNNER_HOME=/home/ubuntu/actions-runner

deb_arch() {
  case $(uname -m) in
    x86_64 )
      echo amd64;;
    aarch64 )
      echo arm64;;
  esac
}

runner_arch() {
  case $(uname -m) in
    x86_64 )
      echo x64;;
    aarch64 )
      echo arm64;;
  esac
}

# We have test for cgroups, and it's broken with cgroups v2
# Ubuntu 22.04 has it enabled by default
sed -r '/GRUB_CMDLINE_LINUX=/ s/"(.*)"/"\1 systemd.unified_cgroup_hierarchy=0"/' -i /etc/default/grub
update-grub

apt-get update

apt-get install --yes --no-install-recommends \
    apt-transport-https \
    at \
    atop \
    binfmt-support \
    build-essential \
    ca-certificates \
    curl \
    gnupg \
    jq \
    lsb-release \
    pigz \
    ripgrep \
    zstd \
    python3-dev \
    python3-pip \
    qemu-user-static \
    unzip \
    gh

# Install docker
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

echo "deb [arch=$(deb_arch) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null

apt-get update
apt-get install --yes --no-install-recommends docker-ce docker-buildx-plugin docker-ce-cli containerd.io

usermod -aG docker ubuntu

# enable ipv6 in containers (fixed-cidr-v6 is some random network mask)
cat <<EOT > /etc/docker/daemon.json
{
  "ipv6": true,
  "fixed-cidr-v6": "2001:db8:1::/64",
  "log-driver": "json-file",
  "log-opts": {
    "max-file": "5",
    "max-size": "1000m"
  },
  "insecure-registries" : ["dockerhub-proxy.dockerhub-proxy-zone:5000"],
  "registry-mirrors" : ["http://dockerhub-proxy.dockerhub-proxy-zone:5000"]
}
EOT

# Install azure-cli
curl -sLS https://packages.microsoft.com/keys/microsoft.asc | gpg --dearmor -o /etc/apt/keyrings/microsoft.gpg
AZ_DIST=$(lsb_release -cs)
echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/microsoft.gpg] https://packages.microsoft.com/repos/azure-cli/ $AZ_DIST main" | tee /etc/apt/sources.list.d/azure-cli.list

apt-get update
apt-get install --yes --no-install-recommends azure-cli

# Increase the limit on number of virtual memory mappings to aviod 'Cannot mmap' error
echo "vm.max_map_count = 2097152" > /etc/sysctl.d/01-increase-map-counts.conf
# Workarond for sanitizers uncompatibility with some kernels, see https://github.com/google/sanitizers/issues/856
echo "vm.mmap_rnd_bits=28" > /etc/sysctl.d/02-vm-mmap_rnd_bits.conf

systemctl restart docker

# buildx builder is user-specific
sudo -u ubuntu docker buildx version
sudo -u ubuntu docker buildx rm default-builder || : # if it's the second attempt
sudo -u ubuntu docker buildx create --use --name default-builder

pip install boto3 pygithub requests urllib3 unidiff dohq-artifactory jwt

rm -rf $RUNNER_HOME  # if it's the second attempt
mkdir -p $RUNNER_HOME && cd $RUNNER_HOME

RUNNER_ARCHIVE="actions-runner-linux-$(runner_arch)-$RUNNER_VERSION.tar.gz"

curl -O -L "https://github.com/actions/runner/releases/download/v$RUNNER_VERSION/$RUNNER_ARCHIVE"

tar xzf "./$RUNNER_ARCHIVE"
rm -f "./$RUNNER_ARCHIVE"
./bin/installdependencies.sh

chown -R ubuntu:ubuntu $RUNNER_HOME

cd /home/ubuntu
curl "https://awscli.amazonaws.com/awscli-exe-linux-$(uname -m).zip" -o "awscliv2.zip"
unzip -q awscliv2.zip
./aws/install

rm -rf /home/ubuntu/awscliv2.zip /home/ubuntu/aws

# SSH keys of core team
mkdir -p /home/ubuntu/.ssh

# ~/.ssh/authorized_keys is cleaned out, so we use deprecated but working  ~/.ssh/authorized_keys2
TEAM_KEYS_URL=$(aws ssm get-parameter --region us-east-1 --name team-keys-url --query 'Parameter.Value' --output=text)
curl "${TEAM_KEYS_URL}" > /home/ubuntu/.ssh/authorized_keys2
chown ubuntu: /home/ubuntu/.ssh -R
chmod 0700 /home/ubuntu/.ssh

# Download cloudwatch agent and install config for it
wget --directory-prefix=/tmp https://s3.amazonaws.com/amazoncloudwatch-agent/ubuntu/"$(deb_arch)"/latest/amazon-cloudwatch-agent.deb{,.sig}
gpg --recv-key --keyserver keyserver.ubuntu.com D58167303B789C72
gpg --verify /tmp/amazon-cloudwatch-agent.deb.sig
dpkg -i /tmp/amazon-cloudwatch-agent.deb
aws ssm get-parameter --region us-east-1 --name AmazonCloudWatch-github-runners --query 'Parameter.Value' --output text > /opt/aws/amazon-cloudwatch-agent/etc/amazon-cloudwatch-agent.json
systemctl enable amazon-cloudwatch-agent.service


echo "Install tailscale"
# Build get-authkey for tailscale
docker run --rm -v /usr/local/bin/:/host-local-bin -i golang:alpine sh -ex <<'EOF'
  CGO_ENABLED=0 go install -tags tag:svc-core-ci-github tailscale.com/cmd/get-authkey@main
  mv /go/bin/get-authkey /host-local-bin
EOF

# install tailscale
curl -fsSL "https://pkgs.tailscale.com/stable/ubuntu/$(lsb_release -cs).noarmor.gpg" > /usr/share/keyrings/tailscale-archive-keyring.gpg
curl -fsSL "https://pkgs.tailscale.com/stable/ubuntu/$(lsb_release -cs).tailscale-keyring.list" > /etc/apt/sources.list.d/tailscale.list
apt-get update
apt-get install tailscale --yes --no-install-recommends


# Create a common script for the instances
mkdir /usr/local/share/scripts -p
setup_cloudflare_dns() {
    # Add cloudflare DNS as a fallback
    # Get default gateway interface
    local IFACE ETH_DNS CLOUDFLARE_NS new_dns
    IFACE=$(ip --json route list | jq '.[]|select(.dst == "default").dev' --raw-output)
    # `Link 2 (eth0): 172.31.0.2`
    ETH_DNS=$(resolvectl dns "$IFACE") || :
    CLOUDFLARE_NS=1.1.1.1
    if [[ "$ETH_DNS" ]] && [[ "${ETH_DNS#*: }" != *"$CLOUDFLARE_NS"* ]]; then
      # Cut the leading legend
      ETH_DNS=${ETH_DNS#*: }
      # shellcheck disable=SC2206
      new_dns=(${ETH_DNS} "$CLOUDFLARE_NS")
      resolvectl dns "$IFACE" "${new_dns[@]}"
    fi
}

setup_tailscale() {
    # Setup tailscale, the very first action
    local TS_API_CLIENT_ID TS_API_CLIENT_SECRET TS_AUTHKEY RUNNER_TYPE
    TS_API_CLIENT_ID=$(aws ssm get-parameter --region us-east-1 --name /tailscale/api-client-id --query 'Parameter.Value' --output text --with-decryption)
    TS_API_CLIENT_SECRET=$(aws ssm get-parameter --region us-east-1 --name /tailscale/api-client-secret --query 'Parameter.Value' --output text --with-decryption)

    RUNNER_TYPE=$(/usr/local/bin/aws ec2 describe-tags --filters "Name=resource-id,Values=$INSTANCE_ID" --query "Tags[?Key=='github:runner-type'].Value" --output text)
    RUNNER_TYPE=${RUNNER_TYPE:-unknown}
    # Clean possible garbage from the runner type
    RUNNER_TYPE=${RUNNER_TYPE//[^0-9a-z]/-}
    TS_AUTHKEY=$(TS_API_CLIENT_ID="$TS_API_CLIENT_ID" TS_API_CLIENT_SECRET="$TS_API_CLIENT_SECRET" \
                 get-authkey -tags tag:svc-core-ci-github -ephemeral)
    tailscale up --ssh --auth-key="$TS_AUTHKEY" --hostname="ci-runner-$RUNNER_TYPE-$INSTANCE_ID"
}

cat > /usr/local/share/scripts/init-network.sh << EOF
!/usr/bin/env bash
$(declare -f setup_cloudflare_dns)

$(declare -f setup_tailscale)

# If the script is sourced, it will return now and won't execute functions
return 0 &>/dev/null || :

echo Setup Cloudflare DNS
setup_cloudflare_dns

echo Setup Tailscale VPN
setup_tailscale
EOF

chmod +x /usr/local/share/scripts/init-network.sh


# The following line is used in aws TOE check.
touch /var/tmp/clickhouse-ci-ami.success
# END OF THE SCRIPT

# TOE (Task Orchestrator and Executor) description
# name: CIInfrastructurePrepare
# description: installs the infrastructure for ClickHouse CI runners
# schemaVersion: 1.0
#
# phases:
#   - name: build
#     steps:
#       - name: DownloadRemoteScript
#         maxAttempts: 3
#         action: WebDownload
#         onFailure: Abort
#         inputs:
#           - source: https://github.com/ClickHouse/ClickHouse/raw/653da5f00219c088af66d97a8f1ea3e35e798268/tests/ci/worker/prepare-ci-ami.sh
#             destination: /tmp/prepare-ci-ami.sh
#       - name: RunScript
#         maxAttempts: 3
#         action: ExecuteBash
#         onFailure: Abort
#         inputs:
#           commands:
#             - bash -x '{{build.DownloadRemoteScript.inputs[0].destination}}'
#
#
#   - name: validate
#     steps:
#       - name: RunScript
#         maxAttempts: 3
#         action: ExecuteBash
#         onFailure: Abort
#         inputs:
#           commands:
#             - ls /var/tmp/clickhouse-ci-ami.success
#       - name: Cleanup
#         action: DeleteFile
#         onFailure: Abort
#         maxAttempts: 3
#         inputs:
#           - path: /var/tmp/clickhouse-ci-ami.success
