package handler

import (
	"encoding/json"
	"fmt"
	"net/http"
	"os"
	"path/filepath"
	"strings"
	"xtcfs/config"
)

// json 结构体
type Response struct {
	Status string        `json:"status"` //状态
	Data   FilesListJson `json:"data"`   //目录下的文件
	Scdir  string        `json:"curdir"` // 扫描的目录
}

// 文件输出的结构
type FileJson struct {
	Fname   string `json:"fname"`
	Dirflag bool   `json:"dirflag"`
}

type FilesListJson struct {
	Flist []FileJson `json:"list"`
}

// 遍历监视目录，发送到json中
func SerInfo(w http.ResponseWriter, r *http.Request) {
	// 监听的目录通过?p=的方式传入
	//urlpath := r.Header.Get("p")
	urlpath := r.URL.Query().Get("p")
	upath := strings.TrimSuffix(urlpath, "nf")
	fmt.Printf("upath is %s\n", upath)
	// 监听的根目录
	realFilePath := filepath.Join(config.G.FilePath, upath)
	downloadPath := filepath.Join(filepath.Base(config.G.FilePath), r.URL.Path[1:])
	// 时间目录的情况
	fileInfo, err := os.Stat(realFilePath)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	data := struct {
		Rundir       string
		IsDir        bool
		FileName     string
		DownloadPath string
		// Files        []os.DirEntry
	}{
		Rundir:       config.G.FilePath,
		DownloadPath: downloadPath,
	}

	// list json
	var flist FilesListJson

	if fileInfo.IsDir() {
		data.IsDir = true
		// 遍历目录
		files, err := os.ReadDir(realFilePath)
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
		// data.Files = files

		for _, v := range files {
			flist.Flist = append(flist.Flist, FileJson{Fname: v.Name(), Dirflag: v.IsDir()})
		}

	} else {
		data.FileName = filepath.Base(realFilePath)
	}

	// respone file list
	response := Response{
		Status: "success",
		Scdir:  upath,
		Data:   flist,
	}
	// 设置跨域响应头
	w.Header().Set("Access-Control-Allow-Origin", "*")
	w.Header().Set("Access-Control-Allow-Methods", "GET, POST, OPTIONS,PUT,DELETET")
	// w.Header().Set("Access-Control-Allow-Headers", "Content-Type,Accept,Accept-Length,Accept-Encoding,X-XSRF-TOKEN,X-XSRF-TOKEN")
	w.Header().Set("Access-Control-Allow-Headers", "*")
	//
	w.Header().Set("Content-Type", "application/json")

	// 如果是OPTIONS请求，返回200 OK
	if r.Method == "OPTIONS" {
		// fmt.Printf("options is now \n")
		// w.WriteHeader(http.StatusOK)
		return
	}

	json.NewEncoder(w).Encode(response)
}