package main

import (
	"crypto/md5"
	"errors"
	"os"
	"path/filepath"
	"strings"

	"go.wit.com/lib/config"
	"go.wit.com/lib/gui/shell"
	"go.wit.com/lib/protobuf/zoopb"
	"go.wit.com/log"
)

func moveOutOfIncoming(fullname string) error {
	if strings.HasPrefix(fullname, "pool/main/incoming") {
		log.Info("file is in incoming", fullname)
	} else {
		log.Info("file isn't in incoming", fullname)
		return nil
	}

	_, filename := filepath.Split(fullname)
	parts := strings.Split(filename, "_")
	if len(parts) != 3 {
		// todo: add more filename checking here (check for ".deb")
		return errors.New(log.Sprintf("bad filenae %s", filename))
	}
	packageName := parts[0]
	letteredDir := log.Sprintf("%1.1s", filename)
	newfilename := filepath.Join("pool/main", letteredDir, packageName, filename)
	if newfilename == fullname {
		// the filename is correct
		return errors.New(log.Sprintf("should be impossible %s", filename))
	}
	destDir := filepath.Dir(newfilename)
	if err := os.MkdirAll(destDir, 0755); err != nil {
		log.Printf("%s  move incoming oldname %s newname: %s\n", packageName, fullname, newfilename)
		log.Fatal("Failed to create destination directory: %v", err)
	}
	if config.Exists(newfilename) {
		olddata, _ := os.ReadFile(fullname)
		newdata, _ := os.ReadFile(newfilename)
		oldmd5 := md5.Sum(olddata)
		newmd5 := md5.Sum(newdata)
		if oldmd5 == newmd5 {
			log.Info("OLD FILE", fullname)
			log.Info("NEW FILE", newfilename)
			log.Printf("files are the same %x %x\n", md5.Sum(olddata), md5.Sum(newdata))
		} else {
			shell.RunVerbose([]string{"dpkg", "-I", fullname})
			shell.RunVerbose([]string{"dpkg", "-I", newfilename})
			log.Printf("different checksums: %s %s\n", fullname, newfilename)
			log.Printf("md5sum old %x vs new %x\n", md5.Sum(olddata), md5.Sum(newdata))
		}
		if argv.Force {
			moveFileToBroken(newfilename)
			// os.Rename(path, newfilename)
			// log.Printf("%s  moved incoming oldname %s newname: %s\n", packageName, path, newfilename)
		}
		// return "file already exists. use --force to replace", errors.New("duplicate .deb in incoming/")
		me.argv.GoodExit("file already exists. TODO: fix this to use --force to replace")
	}
	// file can be moved
	os.Rename(fullname, newfilename)
	log.Printf("%s  moved incoming oldname %s newname: %s\n", packageName, fullname, newfilename)
	return nil
}

func doIncoming(pb *zoopb.Packages) (string, error) {
	os.Chdir(me.pb.BaseDir)

	var counter int
	var incount int
	var newcount int
	err := filepath.Walk("pool", func(path string, info os.FileInfo, err error) error {
		if err != nil {
			return err
		}
		counter += 1
		if !info.IsDir() && strings.HasSuffix(info.Name(), ".deb") {
			if found := me.pb.FindByFilename(path); found != nil {
				// log.Printf("not new file %s\n", path)
				if strings.HasPrefix(path, "pool/main/incoming") {
					incount += 1
					log.Info("file is in incomging", path)
					err := moveOutOfIncoming(path)
					if err != nil {
						log.Info("moveOut err:", err)
					}
				}
			}
			return nil
		}
		newcount += 1
		return nil
	})

	s := log.Sprintf("scanned %d files. (%d) in incoming. (%d) new files pb.Len(%d)", counter, incount, newcount, pb.Len())
	return s, err
}