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2026-04-10 22:59:39 +08:00
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+/**
+ * I18n.js
+ * Internationalization module for Tank Adventure.
+ * Auto-detects language from WeChat system info.
+ * Supports {variable} placeholder interpolation.
+ */
+
+const zhLang = require('./zh');
+const enLang = require('./en');
+
+// ============================================================
+// Language Detection
+// ============================================================
+let _currentLang = 'en'; // default fallback
+
+try {
+  const sysInfo = wx.getSystemInfoSync();
+  const lang = (sysInfo.language || '').toLowerCase();
+  // zh_CN, zh_TW, zh_HK, etc.
+  if (lang.startsWith('zh')) {
+    _currentLang = 'zh';
+  }
+} catch (e) {
+  // Fallback to English if wx API is unavailable
+  _currentLang = 'en';
+}
+
+const _langPacks = {
+  zh: zhLang,
+  en: enLang,
+};
+
+// ============================================================
+// Translation Function
+// ============================================================
+
+/**
+ * Get translated text by key.
+ * Supports {variable} placeholder interpolation.
+ *
+ * @param {string} key - The translation key, e.g. 'menu.title'
+ * @param {Object} [params] - Optional parameters for interpolation
+ * @returns {string} The translated text
+ *
+ * @example
+ * t('menu.title')           // => '坦克探险' or 'Tank Adventure'
+ * t('pvp.hp', { count: 3 }) // => '生命 x3' or 'HP x3'
+ */
+function t(key, params) {
+  // Try current language first
+  let text = _langPacks[_currentLang] && _langPacks[_currentLang][key];
+
+  // Fallback to English
+  if (text === undefined && _currentLang !== 'en') {
+    text = _langPacks.en[key];
+  }
+
+  // Fallback to key itself
+  if (text === undefined) {
+    return key;
+  }
+
+  // Interpolate {variable} placeholders
+  if (params) {
+    text = text.replace(/\{(\w+)\}/g, (match, name) => {
+      return params[name] !== undefined ? String(params[name]) : match;
+    });
+  }
+
+  return text;
+}
+
+/**
+ * Get the current language code.
+ * @returns {string} 'zh' or 'en'
+ */
+function getLang() {
+  return _currentLang;
+}
+
+/**
+ * Set the language manually (for testing or future settings).
+ * @param {string} lang - 'zh' or 'en'
+ */
+function setLang(lang) {
+  if (_langPacks[lang]) {
+    _currentLang = lang;
+  }
+}
+
+module.exports = { t, getLang, setLang };