#!/bin/bash

set -e

echo "🚀 开始在 AlmaLinux 9.4 上安装 Docker..."

# 颜色定义
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

# 检测系统
if [ ! -f /etc/almalinux-release ]; then
    echo -e "${RED}错误: 这个脚本只支持 AlmaLinux${NC}"
    exit 1
fi

echo -e "${YELLOW}[1/7] 清理旧版本...${NC}"
sudo dnf remove -y docker* podman* containerd* || true

echo -e "${YELLOW}[2/7] 安装依赖...${NC}"
sudo dnf install -y dnf-plugins-core yum-utils device-mapper-persistent-data lvm2

echo -e "${YELLOW}[3/7] 添加 Docker 仓库...${NC}"
sudo dnf config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

echo -e "${YELLOW}[4/7] 启用 CRB 仓库...${NC}"
sudo dnf config-manager --set-enabled crb

echo -e "${YELLOW}[5/7] 安装 Docker...${NC}"
sudo dnf install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

echo -e "${YELLOW}[6/7] 配置 Docker...${NC}"
sudo systemctl start docker
sudo systemctl enable docker

echo -e "${YELLOW}[7/7] 配置用户权限...${NC}"
sudo usermod -aG docker $USER

# 配置镜像加速器（国内用户）
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json > /dev/null <<EOF
{
  "registry-mirrors": [
    "https://docker.m.daocloud.io",
    "https://registry.docker-cn.com"
  ],
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  }
}
EOF

sudo systemctl restart docker

echo -e "${GREEN}✅ Docker 安装成功！${NC}"
echo -e "${YELLOW}📋 版本信息:${NC}"
docker --version
docker-compose --version

echo -e "${YELLOW}🔧 请重新登录或运行以下命令:${NC}"
echo "  newgrp docker"
echo -e "${YELLOW}🐳 测试命令:${NC}"
echo "  docker run hello-world"