package main

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

func isGitRepository() bool {
	_, err := os.Stat(".git")
	return err == nil
}

func getGitRootPath() (string, error) {
	output, err := runCommandOutput("git", "rev-parse", "--show-toplevel")
	if err != nil {
		return "", errors.New("not in a git repository")
	}
	return strings.TrimSpace(output), nil
}

func getProjectContainerName(lang string) (string, error) {
	if !isGitRepository() {
		return "", errors.New("must be run inside a git repository")
	}

	gitRoot, err := getGitRootPath()
	if err != nil {
		return "", err
	}

	cwd, err := os.Getwd()
	if err != nil {
		return "", err
	}

	relPath, err := filepath.Rel(gitRoot, cwd)
	if err != nil {
		return "", err
	}

	projectName := filepath.Base(gitRoot)

	var pathComponents []string
	if relPath != "." {
		pathComponents = strings.Split(relPath, string(os.PathSeparator))
	}

	containerName := "hako-" + lang + "-" + sanitizeName(projectName)
	for _, component := range pathComponents {
		containerName += "-" + sanitizeName(component)
	}

	if len(containerName) > 60 {
		return "", errors.New("container name too long, try running from a shallower directory")
	}

	return containerName, nil
}

func sanitizeName(name string) string {
	result := strings.ToLower(name)
	result = strings.ReplaceAll(result, " ", "_")
	result = strings.ReplaceAll(result, ".", "_")
	result = strings.ReplaceAll(result, "-", "_")
	return result
}