package forgepb

import (
	"errors"
	"fmt"
	"os"
	"path/filepath"
	"strings"

	"github.com/destel/rill"
	"go.wit.com/lib/protobuf/gitpb"
	"go.wit.com/log"
)

func (f *Forge) ScanGoSrc() (bool, error) {
	log.Info("pre  dir walk")
	dirs, err := gitDirectoriesNew(f.goSrc)
	log.Info("post dir walk", len(dirs))
	if err != nil {
		return false, err
	}

	var gopaths []string
	for _, dir := range dirs {
		if strings.HasPrefix(dir, f.goSrc) {
			gopath := strings.TrimPrefix(dir, f.goSrc)
			gopath = strings.Trim(gopath, "/")
			gopaths = append(gopaths, gopath)
		} else {
			log.Log(FORGEPBWARN, "ScanGoSrc() bad:", dir)
			return false, errors.New("forgepb.ScanGoSrc() bad dir: " + dir)
		}
	}
	log.Info("pre rill")
	f.rillScanDirs(gopaths)
	return true, err
}

// doesn't enter the directory any further when it finds a .git/
// not stupid like my old version
func gitDirectoriesNew(srcDir string) ([]string, error) {
	var all []string
	err := filepath.WalkDir(srcDir, func(path string, d os.DirEntry, err error) error {
		if err != nil {
			// Handle possible errors, like permission issues
			fmt.Fprintf(os.Stderr, "error accessing path %q: %v\n", path, err)
			return err
		}

		gitdir := filepath.Join(path, ".git")
		_, err2 := os.Stat(gitdir)
		if !os.IsNotExist(err2) {
			all = append(all, path)
			return filepath.SkipDir
		}
		return nil
	})
	return all, err
}

func gitDirectoriesOld(srcDir string) ([]string, error) {
	var all []string
	err := filepath.Walk(srcDir, func(path string, info os.FileInfo, err error) error {
		if err != nil {
			log.Log(FORGEPBWARN, "Error accessing path:", path, err)
			return nil
		}

		// Check if the path is a directory and has a .git subdirectory
		if info.IsDir() && IsGitDir(path) {
			all = append(all, path)
		}

		return nil
	})

	if err != nil {
		log.Log(FORGEPBWARN, "Error walking the path:", srcDir, err)
	}

	return all, err
}

// IsGitDir checks if a .git directory exists inside the given directory
func IsGitDir(dir string) bool {
	gitDir := filepath.Join(dir, ".git")
	info, err := os.Stat(gitDir)
	if os.IsNotExist(err) {
		return false
	}
	return info.IsDir()
}

/*
// rill is awesome. long live rill
func rillAddDirs(gopaths []string) {
	// Convert a slice of user IDs into a channel
	ids := rill.FromSlice(gopaths, nil)

	// Read users from the API.
	// Concurrency = 20
	dirs := rill.Map(ids, 20, func(id string) (*repolist.RepoRow, error) {
		return me.repos.View.FindByName(id), nil
	})

	// Activate users.
	// Concurrency = 10
	err := rill.ForEach(dirs, 10, func(repo *repolist.RepoRow) error {
		fmt.Printf("Repo found : %s\n", repo.GoPath())
		repo.Run([]string{"git", "pull"})
		return nil
	})

	// Handle errors
	fmt.Println("Error:", err)
}
*/

// rill is awesome. long live rill
// attempt scan with rill
func (f *Forge) rillScanDirs(gopaths []string) error {
	// Convert a slice of user IDs into a channel
	ids := rill.FromSlice(gopaths, nil)

	// Read users from the API.
	// Concurrency = 20
	dirs := rill.Map(ids, 20, func(id string) (*gitpb.Repo, error) {
		return f.Repos.NewGoPath(f.goSrc, id)
	})

	// Activate users.
	// Concurrency = 10
	err := rill.ForEach(dirs, 10, func(repo *gitpb.Repo) error {
		// could do something here
		// fmt.Printf("Repo found : %s\n", repo.GoPath)
		// repo.Run([]string{"git", "pull"})
		return nil
	})

	return err
}