package main

import (
	"fmt"
	"io"
	"os"
	"path/filepath"
	"regexp"
	"sparrow/pkg/rpcs"
	"sparrow/pkg/server"
	"sparrow/pkg/utils"
	"sync"
)

// FileAccess RPC服务
type FileAccess struct {
	mu sync.RWMutex
}

// NewFileAccess create a FileAccessor instance
func NewFileAccess() *FileAccess {
	return &FileAccess{}
}

// MoveFile move a file to new path
// source:http://192.168.175.60:9000/upload/tmp/2c9d7d85-2266-450a-9d47-28e67703d818.jpeg
func (f *FileAccess) MoveFile(args *rpcs.ArgsMoveFile, reply *rpcs.ReplyMoveFile) error {
	// check source file
	reg := regexp.MustCompile(`tmp/\$*.*`)
	src := reg.FindString(args.Source)
	fileName := filepath.Base(src)
	server.Log.Debug(src)
	src = *conStaticPath + "/" + src
	b, err := utils.Exists(src)
	if err != nil {
		server.Log.Error(err)
		return err
	}
	if b {
		// copy file
		sourceFileStat, err := os.Stat(src)
		if err != nil {
			return err
		}

		if !sourceFileStat.Mode().IsRegular() {
			return fmt.Errorf("%s is not a regular file", src)
		}

		source, err := os.Open(src)
		if err != nil {
			return err
		}
		defer source.Close()

		dst := *conStaticPath + "/" + args.Target + "/" + fileName
		utils.CreateIfNotExist(dst)
		destination, err := os.Create(dst)
		if err != nil {
			return err
		}
		defer destination.Close()
		io.Copy(destination, source)
		fpath := fmt.Sprintf("http://%s/%s/%s/%s", server.GetHTTPHost(), *conStaticPath, args.Target, fileName)
		if *conDomain != "" {
			fpath = fmt.Sprintf("http://%s/%s/%s/%s", *conDomain, *conStaticPath, args.Target, fileName)
		}
		reply.FilePath = fpath
		//delete src
		os.Remove(src)
		return nil
	}
	return nil
}