package docker

import (
	"sync"

	"github.com/docker/docker/client"

	"gitee.ltd/lxh/wechat-robot/internal/config"
)

var (
	dockerClient *client.Client
	clientOnce   sync.Once
	clientErr    error
)

// InitClient 初始化Docker客户端
func InitClient(cfg *config.DockerConfig) error {
	clientOnce.Do(func() {
		options := []client.Opt{
			client.WithAPIVersionNegotiation(),
		}

		// 如果指定了Docker主机地址
		if cfg.Host != "" {
			options = append(options, client.WithHost(cfg.Host))
		}

		// 如果指定了API版本
		if cfg.APIVersion != "" {
			options = append(options, client.WithVersion(cfg.APIVersion))
		}

		// 创建Docker客户端
		dockerClient, clientErr = client.NewClientWithOpts(options...)
	})

	return clientErr
}

// GetClient 获取Docker客户端实例
func GetClient() *client.Client {
	if dockerClient == nil {
		panic("Docker client not initialized, call InitClient first")
	}
	return dockerClient
}

// CloseClient 关闭Docker客户端
func CloseClient() error {
	if dockerClient != nil {
		return dockerClient.Close()
	}
	return nil
}