package cmd

import (
	"fmt"
	"github.com/gonuts/commander"
	"github.com/gonuts/flag"
	"github.com/smira/aptly/debian"
	"github.com/smira/aptly/utils"
	"os"
	"path/filepath"
	"sort"
	"strings"
)

func aptlyRepoAdd(cmd *commander.Command, args []string) error {
	var err error
	if len(args) < 2 {
		cmd.Usage()
		return err
	}

	name := args[0]

	verifier := &utils.GpgVerifier{}

	localRepoCollection := debian.NewLocalRepoCollection(context.database)
	repo, err := localRepoCollection.ByName(name)
	if err != nil {
		return fmt.Errorf("unable to add: %s", err)
	}

	err = localRepoCollection.LoadComplete(repo)
	if err != nil {
		return fmt.Errorf("unable to add: %s", err)
	}

	context.progress.Printf("Loading packages...\n")

	packageCollection := debian.NewPackageCollection(context.database)
	list, err := debian.NewPackageListFromRefList(repo.RefList(), packageCollection)
	if err != nil {
		return fmt.Errorf("unable to load packages: %s", err)
	}

	packageFiles := []string{}

	for _, location := range args[1:] {
		info, err := os.Stat(location)
		if err != nil {
			context.progress.ColoredPrintf("@y[!]@| @!Unable to process %s: %s@|", location, err)
			continue
		}
		if info.IsDir() {
			err = filepath.Walk(location, func(path string, info os.FileInfo, err error) error {
				if err != nil {
					return err
				}
				if info.IsDir() {
					return nil
				}

				if strings.HasSuffix(info.Name(), ".deb") || strings.HasSuffix(info.Name(), ".dsc") {
					packageFiles = append(packageFiles, path)
				}

				return nil
			})
		} else {
			if strings.HasSuffix(info.Name(), ".deb") || strings.HasSuffix(info.Name(), ".dsc") {
				packageFiles = append(packageFiles, location)
			} else {
				context.progress.ColoredPrintf("@y[!]@| @!Unknwon file extenstion: %s@|", location)
				continue
			}
		}
	}

	processedFiles := []string{}
	sort.Strings(packageFiles)

	for _, file := range packageFiles {
		var (
			stanza debian.Stanza
			err    error
			p      *debian.Package
		)

		isSourcePackage := strings.HasSuffix(file, ".dsc")

		if isSourcePackage {
			stanza, err = debian.GetControlFileFromDsc(file, verifier)

			if err == nil {
				stanza["Package"] = stanza["Source"]
				delete(stanza, "Source")

				p, err = debian.NewSourcePackageFromControlFile(stanza)
			}
		} else {
			stanza, err = debian.GetControlFileFromDeb(file)
			p = debian.NewPackageFromControlFile(stanza)
		}
		if err != nil {
			context.progress.ColoredPrintf("@y[!]@| @!Unable to read file %s: %s@|", file, err)
			continue
		}

		checksums, err := utils.ChecksumsForFile(file)
		if err != nil {
			return err
		}

		if isSourcePackage {
			p.Files = append(p.Files, debian.PackageFile{Filename: filepath.Base(file), Checksums: checksums})
		} else {
			p.Files = []debian.PackageFile{debian.PackageFile{Filename: filepath.Base(file), Checksums: checksums}}
		}

		err = context.packagePool.Import(file, checksums.MD5)
		if err != nil {
			context.progress.ColoredPrintf("@y[!]@| @!Unable to import file %s into pool: %s@|", file, err)
			continue
		}

		processedFiles = append(processedFiles, file)

		// go over all files, except for the last one (.dsc/.deb itself)
		for i := 0; i < len(p.Files)-1; i++ {
			sourceFile := filepath.Join(filepath.Dir(file), filepath.Base(p.Files[i].Filename))
			err = context.packagePool.Import(sourceFile, p.Files[i].Checksums.MD5)
			if err != nil {
				context.progress.ColoredPrintf("@y[!]@| @!Unable to import file %s into pool: %s@|", sourceFile, err)
				break
			}

			processedFiles = append(processedFiles, sourceFile)
		}
		if err != nil {
			// some files haven't been imported
			continue
		}

		err = packageCollection.Update(p)
		if err != nil {
			context.progress.ColoredPrintf("@y[!]@| @!Unable to save package %s: %s@|", p, err)
			continue
		}

		err = list.Add(p)
		if err != nil {
			context.progress.ColoredPrintf("@y[!]@| @!Unable to add package to repo %s: %s@|", p, err)
			continue
		}

		context.progress.ColoredPrintf("@g[+]@| %s added@|", p)
	}

	repo.UpdateRefList(debian.NewPackageRefListFromPackageList(list))

	err = localRepoCollection.Update(repo)
	if err != nil {
		return fmt.Errorf("unable to save: %s", err)
	}

	if cmd.Flag.Lookup("remove-files").Value.Get().(bool) {
		processedFiles = utils.StrSliceDeduplicate(processedFiles)

		for _, file := range processedFiles {
			err := os.Remove(file)
			if err != nil {
				return fmt.Errorf("unable to remove file: %s", err)
			}
		}
	}

	return err
}

func makeCmdRepoAdd() *commander.Command {
	cmd := &commander.Command{
		Run:       aptlyRepoAdd,
		UsageLine: "add <name> <package file.deb>|<directory> ...",
		Short:     "add packages to local repository",
		Long: `
Commands adds packages to local repository. List of files or directories to be
scanned could be specified. If importing from directory, all files matching *.deb
pattern would be scanned and added to the repository. For source packages, all required
files are added as well automatically. By default, when importing
all successfully added files are removed.

ex:
  $ aptly repo add testing myapp-0.1.2.deb incoming/
`,
		Flag: *flag.NewFlagSet("aptly-repo-add", flag.ExitOnError),
	}

	cmd.Flag.Bool("remove-files", false, "remove files that have been imported successfully into repository")

	return cmd
}