package giq

import (
	"fmt"
	"log"
	"os"
	"path/filepath"
)

type Giqi interface {
	Whoami() string
	GitStruct(string, string, string, string) Git
	AddBareWorktree(string, string, string, string)
	RemoveBareWorktree(string, string, string, string)
}

type Git struct {
	RepoPath       string
	Worktree       string
	TmpRepoPath    string
	IsBare         bool
	Branch         string
	PreviousCommit string
	LastCommit     string
	IndexPath      string
	Publish        bool
}

type Gogit struct{}
type Sysgit struct{}

func check(e error) {
	if e != nil {
		log.Fatal(e)
		panic(e)
	}
}

func isGitDir(path string) (bool, error) {
	markers := []string{"HEAD", "objects", "refs"}

	for _, marker := range markers {
		_, err := os.Stat(filepath.Join(path, marker))
		if err == nil {
			continue
		}
		if !os.IsNotExist(err) {
			return false, err
		} else {
			return false, nil
		}
	}

	return true, nil
}

func detectGitPath(path string) (string, bool, error) {
	path, err := filepath.Abs(path)
	if err != nil {
		return "", false, err
	}

	for {
		fi, err := os.Stat(filepath.Join(path, ".git"))
		if err == nil {
			if !fi.IsDir() {
				return "", false, fmt.Errorf(".git exist but is not a directory")
			}
			return path, false, nil
		}
		if !os.IsNotExist(err) {
			return "", false, err
		}

		ok, err := isGitDir(path)
		if err != nil {
			return "", false, err
		}
		if ok {
			return path, true, nil
		}

		if parent := filepath.Dir(path); parent == path {
			return "", false, fmt.Errorf(".git not found")
		} else {
			path = parent
		}
	}
}