/*
 * Verrückte Turing-Maschinen — A turing complete game
 * Copyright (C) 2016-2018 kcf <vidofnir@folksprak.org>
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */


namespace lib_translate
	{
		
		/**
		 * @author kcf <vidofnir@folksprak.org>
		 */
		var _languagestack : Array<string>;
		
		
		/**
		 * @author kcf <vidofnir@folksprak.org>
		 */
		var _data : {[language : string] : {[key : string] : string}} = {};
		
		
		/**
		 * @author kcf <vidofnir@folksprak.org>
		 */
		export function setup(languages : Array<string>) : void
			{
				_languagestack = [];
				languages.forEach
					(
						language =>
							{
								const strs_raw_ : lib_errormonade.type_errormonade<any> = mod_vtm.mod_data.read("strings-" + language);
								if (lib_errormonade.filled(strs_raw_))
									{
										const strs_raw : {[key : string] : string} = (<{[key : string] : string}>(lib_errormonade.read(strs_raw_)));
										_data[language] = {};
										for (const key in strs_raw)
											{
												_data[language][key] = (<string>(strs_raw[key]));
											}
										_languagestack.push(language);
									}
								else
									{
										const message : string = ("Zeichenketten für Sprache '" + language + "' konnten nicht geladen werden");
										console.warn(message);
									}
							}
					)
				;
			}
 		
		
		/**
		 * @author kcf <vidofnir@folksprak.org>
		 */
		function read(language : string, key : string) : lib_errormonade.type_errormonade<string>
			{
				if (language in _data)
					{
						let dataset : {[key : string] : string} = _data[language];
						if (key in dataset)
							{
								return (lib_errormonade.create_just<string>(dataset[key]));
							}
						else
							{
								const message : string = ("keine Zeichenketten für Schlüssel '" + key + "' in Sprache '" + language + "'");
								console.warn(message);
								return (lib_errormonade.create_nothing<string>());
							}
					}
				else
					{
						const message : string = ("keine Zeichenketten für Sprache '" + language + "'");
						console.warn(message);
						return (lib_errormonade.create_nothing<string>());
					}
			}
		
		
		/**
		 * @author kcf <vidofnir@folksprak.org>
		 */
		export function get(key : string, vars : {[name : string] : string} = {}) : string
			{
				let result : lib_errormonade.type_errormonade<string> = (lib_errormonade.create_nothing<string>());
				const found : boolean = (
					_languagestack
					.some
						(
							language =>
								{
									const result_ : lib_errormonade.type_errormonade<string> = read(language, key);
									if (lib_errormonade.filled(result_))
										{
											result = result_;
											return true;
										}
									else
										{
											return false;
										}
								}
						)
				);
				if (found)
					{
						return lib_string.stance(lib_errormonade.read(result), vars);
					}
				else
					{
						return ("{" + key + "}");
					}
			}
		
		
		/**
		 * @author kcf <vidofnir@folksprak.org>
		 */
		export function deploy(context : DocumentFragment) : void
			{
				const pattern : RegExp = (new RegExp("^!translate:([a-z0-9\.]*)$"));
				const adjust = (
					element =>
						{
							if (element.childElementCount > 0)
								{
									// nichts tun
								}
							else
								{
									const content : string = element.textContent;
									const fund : any = pattern.exec(content);
									if (fund === null)
										{
											// nichts tun
										}
									else
										{
											const key : string = fund[1];
											const content_ : string = get(key);
											element.textContent = content_;
										}
								}
						}
				);
				const old : boolean = true;
				const nodelist : NodeListOf<Element> = document.querySelectorAll("*");
				if (old)
					{
						for (let index : int = 0; index < nodelist.length; index += 1) adjust(nodelist[index])
					}
				else
					{
						nodelist.forEach(element => adjust(element));
					}
			}
		
	}