const isObject = (val) => val !== null && typeof val === "object";
const defaultDelimiters = ["{", "}"];
class BaseFormatter {
  constructor() {
    this._caches = /* @__PURE__ */ Object.create(null);
  }
  interpolate(message, values, delimiters = defaultDelimiters) {
    if (!values) {
      return [message];
    }
    let tokens = this._caches[message];
    if (!tokens) {
      tokens = parse(message, delimiters);
      this._caches[message] = tokens;
    }
    return compile(tokens, values);
  }
}
const RE_TOKEN_LIST_VALUE = /^(?:\d)+/;
const RE_TOKEN_NAMED_VALUE = /^(?:\w)+/;
function parse(format, [startDelimiter, endDelimiter]) {
  const tokens = [];
  let position = 0;
  let text = "";
  while (position < format.length) {
    let char = format[position++];
    if (char === startDelimiter) {
      if (text) {
        tokens.push({ type: "text", value: text });
      }
      text = "";
      let sub = "";
      char = format[position++];
      while (char !== void 0 && char !== endDelimiter) {
        sub += char;
        char = format[position++];
      }
      const isClosed = char === endDelimiter;
      const type = RE_TOKEN_LIST_VALUE.test(sub) ? "list" : isClosed && RE_TOKEN_NAMED_VALUE.test(sub) ? "named" : "unknown";
      tokens.push({ value: sub, type });
    } else {
      text += char;
    }
  }
  text && tokens.push({ type: "text", value: text });
  return tokens;
}
function compile(tokens, values) {
  const compiled = [];
  let index = 0;
  const mode = Array.isArray(values) ? "list" : isObject(values) ? "named" : "unknown";
  if (mode === "unknown") {
    return compiled;
  }
  while (index < tokens.length) {
    const token = tokens[index];
    switch (token.type) {
      case "text":
        compiled.push(token.value);
        break;
      case "list":
        compiled.push(values[parseInt(token.value, 10)]);
        break;
      case "named":
        if (mode === "named") {
          compiled.push(values[token.value]);
        }
        break;
    }
    index++;
  }
  return compiled;
}
const LOCALE_ZH_HANS = "zh-Hans";
const LOCALE_ZH_HANT = "zh-Hant";
const LOCALE_EN = "en";
const LOCALE_FR = "fr";
const LOCALE_ES = "es";
const hasOwnProperty = Object.prototype.hasOwnProperty;
const hasOwn = (val, key) => hasOwnProperty.call(val, key);
const defaultFormatter = new BaseFormatter();
function include(str, parts) {
  return !!parts.find((part) => str.indexOf(part) !== -1);
}
function startsWith(str, parts) {
  return parts.find((part) => str.indexOf(part) === 0);
}
function normalizeLocale(locale, messages) {
  if (!locale) {
    return;
  }
  locale = locale.trim().replace(/_/g, "-");
  if (messages && messages[locale]) {
    return locale;
  }
  locale = locale.toLowerCase();
  if (locale === "chinese") {
    return LOCALE_ZH_HANS;
  }
  if (locale.indexOf("zh") === 0) {
    if (locale.indexOf("-hans") > -1) {
      return LOCALE_ZH_HANS;
    }
    if (locale.indexOf("-hant") > -1) {
      return LOCALE_ZH_HANT;
    }
    if (include(locale, ["-tw", "-hk", "-mo", "-cht"])) {
      return LOCALE_ZH_HANT;
    }
    return LOCALE_ZH_HANS;
  }
  let locales = [LOCALE_EN, LOCALE_FR, LOCALE_ES];
  if (messages && Object.keys(messages).length > 0) {
    locales = Object.keys(messages);
  }
  const lang = startsWith(locale, locales);
  if (lang) {
    return lang;
  }
}
class I18n {
  constructor({ locale, fallbackLocale, messages, watcher, formater: formater2 }) {
    this.locale = LOCALE_EN;
    this.fallbackLocale = LOCALE_EN;
    this.message = {};
    this.messages = {};
    this.watchers = [];
    if (fallbackLocale) {
      this.fallbackLocale = fallbackLocale;
    }
    this.formater = formater2 || defaultFormatter;
    this.messages = messages || {};
    this.setLocale(locale || LOCALE_EN);
    if (watcher) {
      this.watchLocale(watcher);
    }
  }
  setLocale(locale) {
    const oldLocale = this.locale;
    this.locale = normalizeLocale(locale, this.messages) || this.fallbackLocale;
    if (!this.messages[this.locale]) {
      this.messages[this.locale] = {};
    }
    this.message = this.messages[this.locale];
    if (oldLocale !== this.locale) {
      this.watchers.forEach((watcher) => {
        watcher(this.locale, oldLocale);
      });
    }
  }
  getLocale() {
    return this.locale;
  }
  watchLocale(fn) {
    const index = this.watchers.push(fn) - 1;
    return () => {
      this.watchers.splice(index, 1);
    };
  }
  add(locale, message, override = true) {
    const curMessages = this.messages[locale];
    if (curMessages) {
      if (override) {
        Object.assign(curMessages, message);
      } else {
        Object.keys(message).forEach((key) => {
          if (!hasOwn(curMessages, key)) {
            curMessages[key] = message[key];
          }
        });
      }
    } else {
      this.messages[locale] = message;
    }
  }
  f(message, values, delimiters) {
    return this.formater.interpolate(message, values, delimiters).join("");
  }
  t(key, locale, values) {
    let message = this.message;
    if (typeof locale === "string") {
      locale = normalizeLocale(locale, this.messages);
      locale && (message = this.messages[locale]);
    } else {
      values = locale;
    }
    if (!hasOwn(message, key)) {
      console.warn(`Cannot translate the value of keypath ${key}. Use the value of keypath as default.`);
      return key;
    }
    return this.formater.interpolate(message[key], values).join("");
  }
}
function watchAppLocale(appVm, i18n) {
  if (appVm.$watchLocale) {
    appVm.$watchLocale((newLocale) => {
      i18n.setLocale(newLocale);
    });
  } else {
    appVm.$watch(() => appVm.$locale, (newLocale) => {
      i18n.setLocale(newLocale);
    });
  }
}
function getDefaultLocale() {
  if (typeof uni !== "undefined" && uni.getLocale) {
    return uni.getLocale();
  }
  if (typeof global !== "undefined" && global.getLocale) {
    return global.getLocale();
  }
  return LOCALE_EN;
}
function initVueI18n(locale, messages = {}, fallbackLocale, watcher) {
  if (typeof locale !== "string") {
    const options = [
      messages,
      locale
    ];
    locale = options[0];
    messages = options[1];
  }
  if (typeof locale !== "string") {
    locale = getDefaultLocale();
  }
  if (typeof fallbackLocale !== "string") {
    fallbackLocale = typeof __uniConfig !== "undefined" && __uniConfig.fallbackLocale || LOCALE_EN;
  }
  const i18n = new I18n({
    locale,
    fallbackLocale,
    messages,
    watcher
  });
  let t = (key, values) => {
    if (typeof getApp !== "function") {
      t = function(key2, values2) {
        return i18n.t(key2, values2);
      };
    } else {
      let isWatchedAppLocale = false;
      t = function(key2, values2) {
        const appVm = getApp().$vm;
        if (appVm) {
          appVm.$locale;
          if (!isWatchedAppLocale) {
            isWatchedAppLocale = true;
            watchAppLocale(appVm, i18n);
          }
        }
        return i18n.t(key2, values2);
      };
    }
    return t(key, values);
  };
  return {
    i18n,
    f(message, values, delimiters) {
      return i18n.f(message, values, delimiters);
    },
    t(key, values) {
      return t(key, values);
    },
    add(locale2, message, override = true) {
      return i18n.add(locale2, message, override);
    },
    watch(fn) {
      return i18n.watchLocale(fn);
    },
    getLocale() {
      return i18n.getLocale();
    },
    setLocale(newLocale) {
      return i18n.setLocale(newLocale);
    }
  };
}
export {
  initVueI18n as i
};
