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

echo "==> Removing conflicting Docker/container packages..."

sudo apt remove -y \
  docker.io \
  docker-compose \
  docker-compose-v2 \
  docker-doc \
  docker-buildx \
  podman-docker \
  containerd \
  runc

echo "==> Updating package lists..."
sudo apt update

echo "==> Installing prerequisites..."
sudo apt install -y ca-certificates curl

echo "==> Installing Docker's official GPG key..."
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

echo "==> Adding Docker's official repository..."
sudo tee /etc/apt/sources.list.d/docker.sources > /dev/null <<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

echo "==> Updating package lists with Docker repository..."
sudo apt update

echo "==> Installing Docker Engine and Compose..."
sudo apt install -y \
  docker-ce \
  docker-ce-cli \
  containerd.io \
  docker-buildx-plugin \
  docker-compose-plugin

echo "==> Enabling and starting Docker..."
sudo systemctl enable --now docker

echo "==> Testing Docker installation..."
sudo docker run --rm hello-world

echo
echo "========================================"
echo " Docker installation completed!"
echo "========================================"
docker --version
docker compose version