#!/usr/bin/env bash
set -euo pipefail

old_packages=$(dpkg --get-selections docker.io docker-compose docker-compose-v2 docker-doc podman-docker containerd runc 2>/dev/null | awk '{print $1}' || true)
if [ -n "$old_packages" ]; then
  sudo apt remove -y $old_packages
fi

# Add Docker's official GPG key:
sudo apt update
sudo apt install -y ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc

# Add the repository to Apt sources:
sudo tee /etc/apt/sources.list.d/docker.sources <<EOF
Types: deb
URIs: https://download.docker.com/linux/ubuntu
Suites: $(. /etc/os-release && echo "${UBUNTU_CODENAME:-$VERSION_CODENAME}")
Components: stable
Architectures: $(dpkg --print-architecture)
Signed-By: /etc/apt/keyrings/docker.asc
EOF

sudo apt update
sudo apt install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

sudo mkdir -p /etc/docker
if [ -f /etc/docker/daemon.json ]; then
  sudo cp /etc/docker/daemon.json "/etc/docker/daemon.json.bak.$(date +%Y%m%d%H%M%S)"
fi

sudo tee /etc/docker/daemon.json > /dev/null <<-'EOF'
{
  "registry-mirrors": [
   "https://docker.m.daocloud.io"
  ]
}
EOF

sudo systemctl daemon-reload
sudo systemctl restart docker

sudo docker version