package ftp

import (
	"io"
	"fmt"
	"time"
	"os"
	"strings"
	"strconv"
	"HFish/core/protocol/ftp/graval"
)

const (
	fileOne = "This is the first file available for download.\n\nBy Jàmes"
	fileTwo = "This is file number two.\n\n2012-12-04"
)

type MemDriver struct{}

func (driver *MemDriver) Authenticate(user string, pass string) bool {
	//return user == "test" && pass == "1234"
	return false
}

func (driver *MemDriver) Bytes(path string) (bytes int) {
	switch path {
	case "/one.txt":
		bytes = len(fileOne)
		break
	case "/files/two.txt":
		bytes = len(fileTwo)
		break
	default:
		bytes = -1
	}
	return
}

func (driver *MemDriver) ModifiedTime(path string) (time.Time, error) {
	return time.Now(), nil
}

func (driver *MemDriver) ChangeDir(path string) bool {
	return path == "/" || path == "/files"
}

func (driver *MemDriver) DirContents(path string) (files []os.FileInfo) {
	files = []os.FileInfo{}
	switch path {
	case "/":
		files = append(files, graval.NewDirItem("files"))
		files = append(files, graval.NewFileItem("one.txt", len(fileOne)))
	case "/files":
		files = append(files, graval.NewFileItem("two.txt", len(fileOne)))
	}
	return files
}

func (driver *MemDriver) DeleteDir(path string) bool {
	return false
}

func (driver *MemDriver) DeleteFile(path string) bool {
	return false
}

func (driver *MemDriver) Rename(fromPath string, toPath string) bool {
	return false
}

func (driver *MemDriver) MakeDir(path string) bool {
	return false
}

func (driver *MemDriver) GetFile(path string) (data string, err error) {
	switch path {
	case "/one.txt":
		data = fileOne
	case "/files/two.txt":
		data = fileTwo
	}
	return
}

func (driver *MemDriver) PutFile(destPath string, data io.Reader) bool {
	return false
}

type MemDriverFactory struct{}

func (factory *MemDriverFactory) NewDriver() (graval.FTPDriver, error) {
	return &MemDriver{}, nil
}

func Start(addr string) {
	arr := strings.Split(addr, ":")
	port, _ := strconv.Atoi(arr[1])

	factory := &MemDriverFactory{}
	ftpServer := graval.NewFTPServer(&graval.FTPServerOpts{Factory: factory, Hostname: arr[0], Port: port})

	err := ftpServer.ListenAndServe()
	if err != nil {
		fmt.Print(err)
	}
}