package globals

import (
	"errors"
	"os"
	"os/user"
	"path"
	"runtime"
	"strings"
)

// Global variables, Mocks, etc.
// This package shall not have any dependency towards the application itself!
// [impl->dsn~properly-defined-globals~1>>utest]

// GLOBAL VARIABLES

// ConfigDirectoryList Configuration directory list
var ConfigDirectoryList []string

// ConfigDirectory Configuration directory string
var ConfigDirectory string

// CollectionOfProtocolsDir is the default directory for protocol collections
var CollectionOfProtocolsDir string

// COPCacheFileName is the filename for the cache
var COPCacheFileName string = "cop-cache.json"

////////////// Global Mockings

// MockUserCurrent is a variable to be able to mock the function call to `user.Current`
var MockUserCurrent = user.Current

// Marshaler interface to enrich structs which can be exported/imported even with private fields
/*
type Marshaler interface {
	toJSON() ([]byte, error)
	fromJSON() error
}
*/

// GetCurrentDir returns the current directory of the called function
func GetCurrentDir() string {
	_, filename, _, _ := runtime.Caller(0)
	return path.Dir(filename)
}

// GetRepoDir tries to find the parent git repository path
func GetRepoDir(start string) (string, error) {
	var repoPath string
	entries, err := os.ReadDir(start)
	for _, v := range entries {
		if strings.HasSuffix(v.Name(), ".git") {
			repoPath = start
		}
	}
	// linux
	if start == "/" {
		return "", errors.New("Parent repository dir couldn't be found")
	}
	// windows, how?
	if repoPath == "" {
		return GetRepoDir(path.Dir(start))
	}
	return repoPath, err
}