import {BrowserHistoryBuildOptions, HashHistoryBuildOptions, History, MemoryHistoryBuildOptions} from "history";
import createBrowserHistory from "history/createBrowserHistory";
import createMemoryHistory from "history/createMemoryHistory";
import {IS_CLIENT, IS_SERVER} from "../check-environment";
import {createLogger} from "../debug/create-logger";
import {LOG_LEVEL} from "../debug/levels";
import {GlobalVariable} from "../pattern/global-page-data";

export const REACT_ROUTE_BASE_VARNAME = 'routingBaseUri';
export type HistoryOptionTypes = BrowserHistoryBuildOptions|HashHistoryBuildOptions|MemoryHistoryBuildOptions;
export type HistoryCreator = (opt: HistoryOptionTypes) => History;

const debug = createLogger(LOG_LEVEL.SILLY, 'history');
const warn = createLogger(LOG_LEVEL.WARN, 'history');

export interface MyHistoryOptions {
	baseUri?: string;
	current?: string;
}

const historyCreator = IS_CLIENT? createBrowserHistory : createMemoryHistory;

export function replaceSingletonHistory(global: GlobalVariable, history: History) {
	global.set('history', history);
}

export function createSingletonHistory(global: GlobalVariable,
                                       options: MyHistoryOptions,
                                       creator: HistoryCreator = historyCreator,): History {
	let history = global.get('history');
	// console.log(history,History)
	if (!history || !history.listen) {
		const baseUri = options.baseUri || global.get(REACT_ROUTE_BASE_VARNAME) || '/';
		global.set(REACT_ROUTE_BASE_VARNAME, baseUri);
		
		let current;
		if (IS_SERVER) {
			if (!options.current) {
				throw new TypeError('createSingletonHistory(): require a "current" option on server. got: ' + JSON.stringify(options));
			}
			current = options.current.replace(baseUri, '/').replace(/^\/\//, '/');
		} else if (options.current) {
			warn('createSingletonHistory(): "current" option no effect on client.')
		}
		
		debug('createSingletonHistory(): baseUri=%s, current=%s', baseUri, current || '{browser-location}');
		history = creator({
			basename: baseUri,
			initialEntries: [current],
			initialIndex: 0,
			keyLength: 6,
		});
		
		replaceSingletonHistory(global, history);
	}
	// console.log(history)
	return history;
	
}