package dfinder

import (
	"b612.me/starlog"
	"b612.me/staros"
	"b612.me/wincmd/ntfs/mft"
	"fmt"
	"github.com/spf13/cobra"
	"math"
	"os"
	"path/filepath"
	"regexp"
	"strings"
)

var dfpath, dfreg, dfoutpath string
var dfonlyname, dfshow bool

func init() {
	Cmd.Flags().StringVarP(&dfoutpath, "outpath", "o", "", "outpath")
	Cmd.Flags().StringVarP(&dfpath, "path", "p", "./", "path you want to search")
	Cmd.Flags().StringVarP(&dfreg, "regexp", "r", ".*", "search regexp")
	Cmd.Flags().BoolVarP(&dfonlyname, "only-filter-name", "f", false, "only regexp for name not path")
	Cmd.Flags().BoolVarP(&dfshow, "show", "s", true, "show on the stdout")
}

var Cmd = &cobra.Command{
	Use:   "dfinder",
	Short: "查找nfts磁盘文件",
	Long:  "查找nfts磁盘文件",
	Run: func(cmd *cobra.Command, args []string) {
		if !staros.IsRoot() {
			starlog.Criticalln("need administator permission to run this command")
			os.Exit(1)
		}
		os.Exit(fileFinder(dfpath, dfreg, dfonlyname, dfoutpath, dfshow))
	},
}

func fileFinder(path string, reg string, onlyFilterName bool, outpath string, show bool) int {
	fullPath, err := filepath.Abs(path)
	if err != nil {
		starlog.Criticalln("filepath not a vaild path", path, err)
		return 1
	}
	vol := filepath.VolumeName(fullPath) + `\`
	fmt.Println(vol)
	if staros.IsFile(fullPath) {
		fullPath = filepath.Dir(fullPath)
	}
	fmt.Println("consider folder is", fullPath)

	fileLists, err := mft.GetFileListsByMftFn(vol, func(name string, isFolder bool) bool {
		if isFolder {
			return true
		}
		if onlyFilterName {
			if matched, _ := regexp.MatchString(reg, name); matched {
				return true
			}
			return false
		}
		return true
	})
	if err != nil {
		starlog.Errorln("read mft failed", err)
		return 3
	}
	getSize := func(size uint64) string {
		floatSize := float64(size)
		var sizeC = []string{"byte", "KB", "MB", "GB", "TB"}
		if floatSize < 1024 {
			return ""
		}
		for i := 0; i < 4; i++ {
			if floatSize/math.Pow(1024, float64(i+1)) < 1024 {
				return fmt.Sprintf("%.4f%s", floatSize/math.Pow(1024, float64(i+1)), sizeC[i+1])
			}
		}
		return ""
	}
	var fp *os.File
	if outpath != "" {
		fp, err = os.Create(outpath)
		if err != nil {
			starlog.Criticalln(err)
		} else {
			defer fp.Close()
			fp.WriteString(`名称,路径,大小,大小（格式化）,修改时间,是否是文件夹` + "\n")
		}
	}
	newReg := regexp.MustCompile(reg)
	for _, v := range fileLists {
		if !strings.Contains(v.Path, fullPath) {
			continue
		}
		if onlyFilterName {
			if show {
				fmt.Printf("name:%-10s path:%-20s size:%-10s modTime:%v\n", v.Name, v.Path, getSize(v.Size), v.ModTime)
			}
			if fp != nil {
				fp.WriteString(fmt.Sprintf("%s,%s,%v,%s,%v,%v\n", v.Name, v.Path, v.Size, getSize(v.Size), v.ModTime, v.IsDir))
			}
		} else {
			if newReg.MatchString(v.Path) {
				if show {
					fmt.Printf("name:%-10s path:%-20s size:%-10s modTime:%v\n", v.Name, v.Path, getSize(v.Size), v.ModTime)
				}
				if fp != nil {
					fp.WriteString(fmt.Sprintf("%s,%s,%v,%s,%v,%v\n", v.Name, v.Path, v.Size, getSize(v.Size), v.ModTime, v.IsDir))
				}
			}
		}

	}
	return 0
}