import path from "node:path"

const to_absolute_path = (p: string): string => {
	if (path.isAbsolute(p)) {
		return p
	}
	return path.resolve(process.cwd(), p)
}

const resolve_env_to_path = (env: string|undefined, fallback: string): string => {
	if (!env) {
		return to_absolute_path(fallback)
	}
	return to_absolute_path(env)
}

const resolve_env_to_boolean = (env: string|undefined, fallback: boolean): boolean => {
	if (!env) {
		return fallback
	}

	const str = env.toLowerCase()

	switch (str) {
		case "false":
		case "no":
		case "off": return false
	}

	return true
}

class Config {
	private _log_dir: string
	private _log_to_file_when_debug: boolean

	readonly is_debug: boolean = process.env.NODE_ENV != "production"
	readonly is_production: boolean = process.env.NODE_ENV == "production"

	private _session_timeout: number = 15 * 60 * 1000

	get log_dir(): string {
		return this._log_dir
	}
	get log_to_file_when_debug(): boolean {
		return this._log_to_file_when_debug
	}

	get session_timeout(): number { return this._session_timeout }

	constructor() {
		this._log_dir = resolve_env_to_path(process.env.APP_LOG_DIR, "./data/logs")	
		this._log_to_file_when_debug = resolve_env_to_boolean(process.env.LOG_TO_FILE_WHEN_DEBUG, false)
	}

}

const _config = new Config()

export default _config;