import { IS_SERVER, isomorphicGlobal } from '../check-environment';
import DI, { DDNames } from '../DI';
import { GlobalVariable } from '../pattern/global-page-data';

export interface DebugConfig {
	isDebugMode: boolean;
}

declare const process: any;
declare const location: any;
declare const window: any;

const output = (IS_SERVER? console.error : console.info).bind(console);

function printInfo(why: string) {
	output('debug mode is %s[%s]: %s', currentDebug? 'ON' : 'OFF', typeof currentDebug, why);
}

let currentDebug;

export function isDebugMode() {
	if (currentDebug === undefined) {
		currentDebug = DI.get(DDNames.isDebugMode, null);
		if (typeof currentDebug === 'boolean') {
			// nothing to do
		} else if (IS_SERVER) {
			currentDebug = process.env.NODE_ENV !== 'production';
			printInfo('process.env.NODE_ENV(' + process.env.NODE_ENV + ') !== production');
		} else {
			currentDebug = GlobalVariable.get(isomorphicGlobal, 'isDebug');
			if (typeof currentDebug !== 'boolean') {
				if (/\bDEBUG\b/.test(location.href)) {
					currentDebug = true;
					printInfo('location.href with DEBUG');
				} else {
					currentDebug = window['isDebug'] || false;
					printInfo('window.isDebug');
				}
			} else {
				printInfo('GlobalVariable::isDebug');
			}
		}
		
		currentDebug = !!(currentDebug as any);
		DI.overwrite(DDNames.isDebugMode, currentDebug);
	}
	
	return DI.get(DDNames.isDebugMode);
}

export function setDebugMode(status: boolean) {
	console.log('this is%s debug mode', status? '' : ' not');
	return DI.set(DDNames.isDebugMode, !!(status as any));
}