package config

import (
	_ "embed"
	"fmt"
	"os"
	"path/filepath"
	"strings"
)

//go:embed version
var version string

//go:embed name
var name string

//go:embed config.json
var defaultConfig string

type LogLevel string

const (
	Debug LogLevel = "debug"
	Info  LogLevel = "info"
	Warn  LogLevel = "warn"
	Error LogLevel = "error"
)

func GetVersion() string {
	return strings.TrimSpace(version)
}

func GetName() string {
	return strings.TrimSpace(name)
}

func GetLogLevel() LogLevel {
	if IsDebug() {
		return Debug
	}
	logLevel := os.Getenv("SUI_LOG_LEVEL")
	if logLevel == "" {
		return Info
	}
	return LogLevel(logLevel)
}

func IsDebug() bool {
	return os.Getenv("SUI_DEBUG") == "true"
}

func GetBinFolderPath() string {
	binFolderPath := os.Getenv("SUI_BIN_FOLDER")
	if binFolderPath == "" {
		binFolderPath = "bin"
	}
	return binFolderPath
}

func GetDBFolderPath() string {
	dbFolderPath := os.Getenv("SUI_DB_FOLDER")
	if dbFolderPath == "" {
		dir, err := filepath.Abs(filepath.Dir(os.Args[0]))
		if err != nil {
			dbFolderPath = "/usr/local/s-ui/db"
		}
		dbFolderPath = dir + "/db"
	}
	return dbFolderPath
}

func GetDBPath() string {
	return fmt.Sprintf("%s/%s.db", GetDBFolderPath(), GetName())
}

func GetDefaultConfig() string {
	apiEnv := GetEnvApi()
	if len(apiEnv) > 0 {
		return strings.Replace(defaultConfig, "127.0.0.1:1080", apiEnv, 1)
	}
	return defaultConfig
}

func GetEnvApi() string {
	return os.Getenv("SINGBOX_API")
}

func IsSystemd() bool {
	pid := os.Getppid()
	cmdline, err := os.ReadFile(fmt.Sprintf("/proc/%d/comm", pid))
	if err != nil {
		return false
	}
	return string(cmdline) == "systemd\n"
}