package core

import (
	"fmt"
	"net/rpc"
	"os"
	"path"
	"path/filepath"
	"scagent/config"
	"scagent/util"
	"strings"
	"time"

	"go.uber.org/zap"
)

// 压缩文件
type ZipBlock struct {
	Basepath   string
	Curpath    string   // 当前路径
	SelFile    []string // 选中的文件
	RemoteAddr string   // 远程主机地址，带端口
	RemotePath string   // 远程主机的存储路径
}

// FileTransferService 定义文件传输服务
type FileService struct{}

// 客户端
type UpFileClient struct {
	rpcClient *rpc.Client
}

// 创建新的客户端
func NewUpFileClient(addr string) (*UpFileClient, error) {
	client, err := rpc.Dial("tcp", addr)
	if err != nil {
		return nil, err
	}
	return &UpFileClient{rpcClient: client}, nil
}

// 压缩文件
// 返回压缩包的名称
func (f *FileService) Compress(args *ZipBlock, reply *string) error {
	// fmt.Printf("compress args: %v\n", args)
	// 启用日志
	logger := util.NewProductionLogger()
	defer logger.Sync()
	// 实际路径
	realFilePath := filepath.Join(args.Basepath, args.Curpath)
	logger.Info("Compress", zap.String("realFilePath", realFilePath))
	// zip 文件名
	zpFileName := "BIU_" + time.Now().Format("20060102_150405") + ".zip"
	// 创建zip 异步？
	taskId := make(chan string)
	// 异步压缩
	go func() {
		util.CompressToZip(zpFileName, realFilePath, args.SelFile)
		taskId <- "arcok"
		// 日志输出
		logger.Info("压缩文件", zap.String("filename", zpFileName), zap.String("path", realFilePath))
	}()
	// ZIP 文件的实际路径
	ziprl := path.Join(config.G.FilePath, "/sync_zips", zpFileName)
	// zip 创建成功后
	rest := <-taskId
	// 如果压缩包生成成功以后再执行
	if strings.EqualFold(strings.ToLower(rest), "arcok") {
		// 合并为实际路径
		remotePath := path.Join("/www/wwwroot", args.RemotePath, zpFileName)
		// 异步发送文件到远程服务器上

		go func() {
			clientUploadFile(args.RemoteAddr, ziprl, remotePath)
			taskId <- "upok"
		}()

		// 返回压缩包名称
		*reply = ziprl
	}

	return nil
}

// 客户端调用RPC传送文件的函数
// 传入zip的实际路径，远程的服务器带端口，远程文件存放路径
func clientUploadFile(remote string, filePath string, uploadPath string) {
	fmt.Printf("remote: %s, filePath: %s, uploadPath: %s\n", remote, filePath, uploadPath)
	// 启用日志
	logger := util.NewProductionLogger()
	defer logger.Sync()
	// 将服务器的信息拆分为ip和端口
	harr := strings.Split(remote, ":")
	dstip := harr[0]
	dport := harr[1]

	// 连接到RPC服务器
	service := fmt.Sprintf("%v:%v", dstip, dport)
	client, err := NewUpFileClient(service)
	if err != nil {
		logger.Error("NewUpFileClient failed", zap.Error(err))
	}
	defer client.rpcClient.Close()
	// 调用 transferFile
	err = client.TransferFile(filePath, uploadPath)
	if err != nil {
		logger.Error("TransferFile failed", zap.Error(err))
		fmt.Printf("TransferFile failed: %v\n", err)
	}
	fmt.Printf("TransferFile success\n")

}

// 传输文件
func (c *UpFileClient) TransferFile(filePath string, uploadPath string) error {

	// 发送文件信息
	fmt.Printf("TransferFile filePath: %s, uploadPath: %s\n", filePath, uploadPath)
	// 获取文件信息
	fileInfo, err := os.Stat(filePath)
	if err != nil {
		// panic(err)
		fmt.Printf("获取文件信息失败: %v\n", err)
		return err
	}

	// 提取文件名
	// 远程的文件名
	fileName := filepath.Base(uploadPath)
	fmt.Printf("fileName: %s\n", fileName)

	// 远程服务器的路径
	dirpath := filepath.Dir(uploadPath)
	fmt.Printf("remote dirpath: %s\n", dirpath)
	fmt.Printf("file size: %d\n", fileInfo.Size())

	// 发送文件信息
	var reply string
	// 异步
	go func() {
		c.rpcClient.Call("UpFileService.SendFileInfo", FileInfo{
			FileName: uploadPath,
			FileSize: fileInfo.Size(),
		}, &reply)
		// 输出执行的结果
		fmt.Printf("SendFileInfo result: %s\n", reply)
	}()

	return nil
}