package handler

import (
	"net/http"
	"os"
	"path/filepath"
        "strings"

	"filer/pkg/logger"

	"github.com/gin-gonic/gin"
)

type HandlerConfig struct {
	Datadir string
}

type Handler struct {
	log     *logger.Logger
	datadir string
}

func NewHandler(conf *HandlerConfig) (*Handler, error) {
	var err error
	hand := &Handler{
		log: logger.NewLogger("handler"),
	}
	return hand, err
}

func (hand *Handler) GetFile(gctx *gin.Context) {
	filePath := gctx.FullPath()
	localFilePath := filepath.Join(hand.datadir, filePath)

	if strings.Contains(localFilePath, "/../") {
		gctx.Status(http.StatusBadRequest)
                return
	}
	if len(filePath) > 0 && fileExists(localFilePath) {
		gctx.FileAttachment(localFilePath, filepath.Base(filePath))
		return
	} else {
		gctx.Status(http.StatusNotFound)
		return
	}
}

func fileExists(name string) bool {
	fi, err := os.Stat(name)
	if err != nil {
		if os.IsNotExist(err) {
			return false
		}
	}
	return !fi.IsDir()
}