package api

import (
	"github.com/revel/revel"
	//	"encoding/json"
//	. "github.com/leanote/leanote/app/lea"
//	"gopkg.in/mgo.v2/bson"
	//	"github.com/leanote/leanote/app/lea/netutil"
//	"github.com/leanote/leanote/app/info"
//	"io/ioutil"
	"os"
	//	"strconv"
	"io"
	"time"
	"strings"
   "archive/tar"
    "compress/gzip"
)

// 文件操作, 图片, 头像上传, 输出

type ApiFile struct {
	ApiBaseContrller
}

/*
// 协作时复制图片到owner
func (c ApiFile) CopyImage(userId, fileId, toUserId string) revel.Result {
	re := info.NewRe()

	re.Ok, re.Id = fileService.CopyImage(userId, fileId, toUserId)

	return c.RenderJson(re)
}

// get all images by userId with page
func (c ApiFile) GetImages(albumId, key string, page int) revel.Result {
	imagesPage := fileService.ListImagesWithPage(c.getUserId(), albumId, key, page, 12)
	re := info.NewRe()
	re.Ok = true
	re.Item = imagesPage
	return c.RenderJson(re)
}

func (c ApiFile) UpdateImageTitle(fileId, title string) revel.Result {
	re := info.NewRe()
	re.Ok = fileService.UpdateImageTitle(c.getUserId(), fileId, title)
	return c.RenderJson(re)
}

func (c ApiFile) DeleteImage(fileId string) revel.Result {
	re := info.NewRe()
	re.Ok, re.Msg = fileService.DeleteImage(c.getUserId(), fileId)
	return c.RenderJson(re)
}

*/

//-----------

// 输出image
// [OK]
func (c ApiFile) GetImage(fileId string) revel.Result {
	path := fileService.GetFile(c.getUserId(), fileId) // 得到路径
	if path == "" {
		return c.RenderText("")
	}
	fn := revel.BasePath + "/" + strings.TrimLeft(path, "/")
	file, _ := os.Open(fn)
	return c.RenderFile(file, revel.Inline) // revel.Attachment
}

// 下载附件
// [OK]
func (c ApiFile) GetAttach(fileId string) revel.Result {
	attach := attachService.GetAttach(fileId, c.getUserId()); // 得到路径
	path := attach.Path
	if path == "" {
		return c.RenderText("No Such File")
	}
	fn := revel.BasePath + "/" +  strings.TrimLeft(path, "/")
    file, _ := os.Open(fn)
    return c.RenderBinary(file, attach.Title, revel.Attachment, time.Now()) // revel.Attachment
}

// 下载所有附件
// [OK]
func (c ApiFile) GetAllAttachs(noteId string) revel.Result {
	note := noteService.GetNoteById(noteId)
	if note.NoteId == "" {
		return c.RenderText("")
	}
	// 得到文件列表
	attachs := attachService.ListAttachs(noteId, c.getUserId())
	if attachs == nil || len(attachs) == 0 {
		return c.RenderText("")
	}
	
	/*
	dir := revel.BasePath + "/files/tmp"
	err := os.MkdirAll(dir, 0755)
	if err != nil {
		return c.RenderText("")
	}
	*/
	
	filename := note.Title + ".tar.gz"
	if note.Title == "" {
		filename = "all.tar.gz"
	}
	
	// file write
    fw, err := os.Create(revel.BasePath + "/files/" + filename)
    if err != nil {
		return c.RenderText("")
    }
    // defer fw.Close() // 不需要关闭, 还要读取给用户下载
  
    // gzip write
    gw := gzip.NewWriter(fw)
    defer gw.Close()
  
    // tar write
    tw := tar.NewWriter(gw)
    defer tw.Close()
    
    // 遍历文件列表
    for _, attach := range attachs {
		fn := revel.BasePath + "/" +  strings.TrimLeft(attach.Path, "/")
	    fr, err := os.Open(fn)
	    fileInfo, _ := fr.Stat()
        if err != nil {
			return c.RenderText("")
        }
        defer fr.Close()
        
        // 信息头
        h := new(tar.Header)
        h.Name = attach.Title
        h.Size = fileInfo.Size()
        h.Mode = int64(fileInfo.Mode())
        h.ModTime = fileInfo.ModTime()
  
        // 写信息头
        err = tw.WriteHeader(h)
        if err != nil {
            panic(err)
        }
  
        // 写文件
        _, err = io.Copy(tw, fr)
        if err != nil {
            panic(err)
        }
    } // for
    
//    tw.Close()
//    gw.Close()
//    fw.Close()
//    file, _ := os.Open(dir + "/" + filename)
	// fw.Seek(0, 0)
    return c.RenderBinary(fw, filename, revel.Attachment, time.Now()) // revel.Attachment
}