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package ENV

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

	"go.wit.com/log"
)

func loadENV() error {
	if envPB != nil {
		log.Info("envPB already loaded")
		return errors.New("envPB already loaded")
	}
	filename, err := getConfigFilenameENV()
	if err != nil {
		return err
	}
	// log.Info("loadENV()", filename)
	stuff, err := os.ReadFile(filename)
	if err != nil {
		return err
	}
	saveMu.Lock()
	defer saveMu.Unlock()
	envPB = NewKeys()
	for _, line := range strings.Split(string(stuff), "\n") {
		line = strings.TrimSpace(line)
		if line == "" {
			continue
		}
		parts := strings.Split(line, "=")
		if len(parts) != 2 {
			// log.Info("INVALID LINE:", i, line)
			continue
		}
		c := new(Key)
		c.Var = parts[0]
		c.Value = parts[1]
		envPB.Append(c)
		// log.Printf("ENV LINE: (%v)\n", c)
	}

	return err
}

func getConfigFilenameENV() (string, error) {
	appname, err := GetAppname() // already configured by your application
	if err != nil {
		return "", err
	}

	configdir, err := getConfigDir()
	if err != nil {
		return "", err
	}

	filename := filepath.Join(configdir, appname+".ENV")
	return filename, nil
}

func getCacheDir() (string, error) {
	if Get("cacheDir") != "" {
		return Get("cacheDir"), nil
	}

	cacheDir, _ := os.UserCacheDir()

	appname, err := GetAppname() // application should have already configured this
	if err != nil {
		return cacheDir, err
	}

	return filepath.Join(cacheDir, appname), nil
}

func getConfigDir() (string, error) {
	if Get("configDir") != "" {
		return Get("configDir"), nil
	}

	configDir, _ := os.UserConfigDir()

	appname, err := GetAppname() // application should have already configured this
	if err != nil {
		return configDir, err
	}

	return filepath.Join(configDir, appname), nil
}