/**
 * Base type for logging levels.
 */
enum LoggingLevel {
    Silent = 0,
    Success = 1,
    Error = 2,
    Warning = 3,
    Info = 4,
    Debug = 5,
    Verbose = 6,
}

/**
 * Returns true if the given element is a logging level.
 * @param something
 * @return boolean
 */
const isLoggingLevel = (something: any): something is LoggingLevel => {
    return [
        LoggingLevel.Silent,
        LoggingLevel.Success,
        LoggingLevel.Error,
        LoggingLevel.Warning,
        LoggingLevel.Info,
        LoggingLevel.Debug,
        LoggingLevel.Verbose
    ].includes(something)
}

/**
 * Base type for a message written to the log.
 */
interface LogMessage {
    level: LoggingLevel,
    date: Date,
    output: any,
    caller_name: string,
}

/**
 * Returns true if the given object is a log message.
 * @param something
 * @return boolean
 */
const isLogMessage = (something: any): something is LogMessage => {
    return isLoggingLevel(something?.level) && something?.date instanceof Date;
}

export { LoggingLevel, LogMessage, isLoggingLevel, isLogMessage }