package config

import (
	"fmt"
	"io/fs"
	"io/ioutil"
	"os"
	"path"
	"path/filepath"

	"github.com/Autonomic-Cooperative/godotenv"
	"github.com/sirupsen/logrus"
)

var ABRA_DIR = os.ExpandEnv("$HOME/.abra")
var ABRA_SERVER_FOLDER = path.Join(ABRA_DIR, "servers")
var APPS_JSON = path.Join(ABRA_DIR, "apps.json")
var APPS_DIR = path.Join(ABRA_DIR, "apps")
var REPOS_BASE_URL = "https://git.coopcloud.tech/coop-cloud"

func (a AppFiles) GetServers() []string {
	var unique []string
	servers := make(map[string]struct{})
	for _, appFile := range a {
		if _, ok := servers[appFile.Server]; !ok {
			servers[appFile.Server] = struct{}{}
			unique = append(unique, appFile.Server)
		}
	}
	return unique
}

func ReadEnv(filePath string) (AppEnv, error) {
	var envFile AppEnv
	envFile, err := godotenv.Read(filePath)
	if err != nil {
		return nil, err
	}
	return envFile, nil
}

func ReadServerNames() ([]string, error) {
	serverNames, err := getAllFoldersInDirectory(ABRA_SERVER_FOLDER)
	if err != nil {
		return nil, err
	}
	return serverNames, nil
}

// getAllFilesInDirectory returns filenames of all files in directory
func getAllFilesInDirectory(directory string) ([]fs.FileInfo, error) {
	var realFiles []fs.FileInfo
	files, err := ioutil.ReadDir(directory)
	if err != nil {
		return nil, err
	}
	for _, file := range files {
		// Follow any symlinks
		filePath := path.Join(directory, file.Name())
		realPath, err := filepath.EvalSymlinks(filePath)
		if err != nil {
			logrus.Warningf("broken symlink in your abra config folders: '%s'", filePath)
		} else {
			realFile, err := os.Stat(realPath)
			if err != nil {
				return nil, err
			}
			if !realFile.IsDir() {
				realFiles = append(realFiles, file)
			}
		}

	}
	return realFiles, nil
}

// getAllFoldersInDirectory returns both folder and symlink paths
func getAllFoldersInDirectory(directory string) ([]string, error) {
	var folders []string
	files, err := ioutil.ReadDir(directory)
	if err != nil {
		return nil, err
	}
	if len(files) == 0 {
		return nil, fmt.Errorf("directory is empty: '%s'", directory)
	}
	for _, file := range files {
		// Check if file is directory or symlink
		if file.IsDir() || file.Mode()&fs.ModeSymlink != 0 {
			filePath := path.Join(directory, file.Name())
			realDir, err := filepath.EvalSymlinks(filePath)
			if err != nil {
				logrus.Warningf("broken symlink in your abra config folders: '%s'", filePath)
			} else if stat, err := os.Stat(realDir); err == nil && stat.IsDir() {
				// path is a directory
				folders = append(folders, file.Name())
			}
		}
	}
	return folders, nil
}

// EnsureAbraDirExists checks for the abra config folder and throws error if not
func EnsureAbraDirExists() error {
	if _, err := os.Stat(ABRA_DIR); os.IsNotExist(err) {
		if err := os.Mkdir(ABRA_DIR, 0777); err != nil {
			return err
		}
	}
	return nil
}