#!/usr/bin/env bash
set -e

# === Docker 安装脚本 for Debian 11/12 ===
# 作者: kosnode
# 用法: bash <(curl -fsSL dkr.kosno.de)

echo "[INFO] Updating system packages..."
sudo apt update -y
sudo apt install -y ca-certificates curl gnupg lsb-release

echo "[INFO] Adding Docker GPG key..."
sudo install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/debian/gpg \
  | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
sudo chmod a+r /etc/apt/keyrings/docker.gpg

echo "[INFO] Adding Docker APT repository..."
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] \
  https://download.docker.com/linux/debian $(lsb_release -cs) stable" \
  | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

echo "[INFO] Installing Docker..."
sudo apt update -y
sudo apt install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

# 加入 docker 用户组
CURRENT_USER=$(whoami)
sudo usermod -aG docker "$CURRENT_USER"
echo "✅ 用户 $CURRENT_USER 已加入 docker 组，请重新登录或运行 'newgrp docker'"

echo "[INFO] Checking Docker version..."
docker --version
echo "🎉 Docker 安装完成！"