/*!
  * vue-i18n v9.2.0-alpha.5
  * (c) 2021 kazuya kawaguchi
  * Released under the MIT License.
  */
'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var shared = require('@intlify/shared');
var coreBase = require('@intlify/core-base');
var vue = require('vue');

/**
 * Vue I18n Version
 *
 * @remarks
 * Semver format. Same format as the package.json `version` field.
 *
 * @VueI18nGeneral
 */
const VERSION = '9.2.0-alpha.5';

const I18nWarnCodes = {
    FALLBACK_TO_ROOT: coreBase.CoreWarnCodes.__EXTEND_POINT__,
    NOT_SUPPORTED_PRESERVE: coreBase.CoreWarnCodes.__EXTEND_POINT__ + 1,
    NOT_SUPPORTED_FORMATTER: coreBase.CoreWarnCodes.__EXTEND_POINT__ + 2,
    NOT_SUPPORTED_PRESERVE_DIRECTIVE: coreBase.CoreWarnCodes.__EXTEND_POINT__ + 3,
    NOT_SUPPORTED_GET_CHOICE_INDEX: coreBase.CoreWarnCodes.__EXTEND_POINT__ + 4,
    COMPONENT_NAME_LEGACY_COMPATIBLE: coreBase.CoreWarnCodes.__EXTEND_POINT__ + 5,
    NOT_FOUND_PARENT_SCOPE: coreBase.CoreWarnCodes.__EXTEND_POINT__ + 6
};
const warnMessages = {
    [I18nWarnCodes.FALLBACK_TO_ROOT]: `Fall back to {type} '{key}' with root locale.`,
    [I18nWarnCodes.NOT_SUPPORTED_PRESERVE]: `Not supported 'preserve'.`,
    [I18nWarnCodes.NOT_SUPPORTED_FORMATTER]: `Not supported 'formatter'.`,
    [I18nWarnCodes.NOT_SUPPORTED_PRESERVE_DIRECTIVE]: `Not supported 'preserveDirectiveContent'.`,
    [I18nWarnCodes.NOT_SUPPORTED_GET_CHOICE_INDEX]: `Not supported 'getChoiceIndex'.`,
    [I18nWarnCodes.COMPONENT_NAME_LEGACY_COMPATIBLE]: `Component name legacy compatible: '{name}' -> 'i18n'`,
    [I18nWarnCodes.NOT_FOUND_PARENT_SCOPE]: `Not found parent scope. use the global scope.`
};
function getWarnMessage(code, ...args) {
    return shared.format(warnMessages[code], ...args);
}

const I18nErrorCodes = {
    // composer module errors
    UNEXPECTED_RETURN_TYPE: coreBase.CompileErrorCodes.__EXTEND_POINT__,
    // legacy module errors
    INVALID_ARGUMENT: coreBase.CompileErrorCodes.__EXTEND_POINT__ + 1,
    // i18n module errors
    MUST_BE_CALL_SETUP_TOP: coreBase.CompileErrorCodes.__EXTEND_POINT__ + 2,
    NOT_INSLALLED: coreBase.CompileErrorCodes.__EXTEND_POINT__ + 3,
    NOT_AVAILABLE_IN_LEGACY_MODE: coreBase.CompileErrorCodes.__EXTEND_POINT__ + 4,
    // directive module errors
    REQUIRED_VALUE: coreBase.CompileErrorCodes.__EXTEND_POINT__ + 5,
    INVALID_VALUE: coreBase.CompileErrorCodes.__EXTEND_POINT__ + 6,
    // vue-devtools errors
    CANNOT_SETUP_VUE_DEVTOOLS_PLUGIN: coreBase.CompileErrorCodes.__EXTEND_POINT__ + 7,
    // unexpected error
    UNEXPECTED_ERROR: coreBase.CompileErrorCodes.__EXTEND_POINT__ + 8,
    // for enhancement
    __EXTEND_POINT__: coreBase.CompileErrorCodes.__EXTEND_POINT__ + 9
};
function createI18nError(code, ...args) {
    return coreBase.createCompileError(code, null, { messages: errorMessages, args } );
}
const errorMessages = {
    [I18nErrorCodes.UNEXPECTED_RETURN_TYPE]: 'Unexpected return type in composer',
    [I18nErrorCodes.INVALID_ARGUMENT]: 'Invalid argument',
    [I18nErrorCodes.MUST_BE_CALL_SETUP_TOP]: 'Must be called at the top of a `setup` function',
    [I18nErrorCodes.NOT_INSLALLED]: 'Need to install with `app.use` function',
    [I18nErrorCodes.UNEXPECTED_ERROR]: 'Unexpected error',
    [I18nErrorCodes.NOT_AVAILABLE_IN_LEGACY_MODE]: 'Not available in legacy mode',
    [I18nErrorCodes.REQUIRED_VALUE]: `Required in value: {0}`,
    [I18nErrorCodes.INVALID_VALUE]: `Invalid value`,
    [I18nErrorCodes.CANNOT_SETUP_VUE_DEVTOOLS_PLUGIN]: `Cannot setup vue-devtools plugin`
};

/* eslint-disable @typescript-eslint/no-explicit-any */
const DEVTOOLS_META = '__INTLIFY_META__';
const TransrateVNodeSymbol = shared.makeSymbol('__transrateVNode');
const DatetimePartsSymbol = shared.makeSymbol('__datetimeParts');
const NumberPartsSymbol = shared.makeSymbol('__numberParts');
const EnableEmitter = shared.makeSymbol('__enableEmitter');
const DisableEmitter = shared.makeSymbol('__disableEmitter');
const SetPluralRulesSymbol = shared.makeSymbol('__setPluralRules');
shared.makeSymbol('__intlifyMeta');
let composerID = 0;
function defineCoreMissingHandler(missing) {
    return ((ctx, locale, key, type) => {
        return missing(locale, key, vue.getCurrentInstance() || undefined, type);
    });
}
function getLocaleMessages(locale, options) {
    const { messages, __i18n, messageResolver, flatJson } = options;
    // prettier-ignore
    const ret = shared.isPlainObject(messages)
        ? messages
        : shared.isArray(__i18n)
            ? {}
            : { [locale]: {} };
    // merge locale messages of i18n custom block
    if (shared.isArray(__i18n)) {
        __i18n.forEach(({ locale, resource }) => {
            if (locale) {
                ret[locale] = ret[locale] || {};
                deepCopy(resource, ret[locale]);
            }
            else {
                deepCopy(resource, ret);
            }
        });
    }
    // handle messages for flat json
    if (messageResolver == null && flatJson) {
        for (const key in ret) {
            if (shared.hasOwn(ret, key)) {
                coreBase.handleFlatJson(ret[key]);
            }
        }
    }
    return ret;
}
const isNotObjectOrIsArray = (val) => !shared.isObject(val) || shared.isArray(val);
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function deepCopy(src, des) {
    // src and des should both be objects, and non of then can be a array
    if (isNotObjectOrIsArray(src) || isNotObjectOrIsArray(des)) {
        throw createI18nError(I18nErrorCodes.INVALID_VALUE);
    }
    for (const key in src) {
        if (shared.hasOwn(src, key)) {
            if (isNotObjectOrIsArray(src[key]) || isNotObjectOrIsArray(des[key])) {
                // replace with src[key] when:
                // src[key] or des[key] is not a object, or
                // src[key] or des[key] is a array
                des[key] = src[key];
            }
            else {
                // src[key] and des[key] are both object, merge them
                deepCopy(src[key], des[key]);
            }
        }
    }
}
// for Intlify DevTools
const getMetaInfo = /* #__PURE__*/ () => {
    const instance = vue.getCurrentInstance();
    return instance && instance.type[DEVTOOLS_META] // eslint-disable-line @typescript-eslint/no-explicit-any
        ? { [DEVTOOLS_META]: instance.type[DEVTOOLS_META] } // eslint-disable-line @typescript-eslint/no-explicit-any
        : null;
};
/**
 * Create composer interface factory
 *
 * @internal
 */
function createComposer(options = {}) {
    const { __root } = options;
    const _isGlobal = __root === undefined;
    let _inheritLocale = shared.isBoolean(options.inheritLocale)
        ? options.inheritLocale
        : true;
    const _locale = vue.ref(
    // prettier-ignore
    __root && _inheritLocale
        ? __root.locale.value
        : shared.isString(options.locale)
            ? options.locale
            : 'en-US');
    const _fallbackLocale = vue.ref(
    // prettier-ignore
    __root && _inheritLocale
        ? __root.fallbackLocale.value
        : shared.isString(options.fallbackLocale) ||
            shared.isArray(options.fallbackLocale) ||
            shared.isPlainObject(options.fallbackLocale) ||
            options.fallbackLocale === false
            ? options.fallbackLocale
            : _locale.value);
    const _messages = vue.ref(getLocaleMessages(_locale.value, options));
    const _datetimeFormats = vue.ref(shared.isPlainObject(options.datetimeFormats)
        ? options.datetimeFormats
        : { [_locale.value]: {} });
    const _numberFormats = vue.ref(shared.isPlainObject(options.numberFormats)
        ? options.numberFormats
        : { [_locale.value]: {} });
    // warning suppress options
    // prettier-ignore
    let _missingWarn = __root
        ? __root.missingWarn
        : shared.isBoolean(options.missingWarn) || shared.isRegExp(options.missingWarn)
            ? options.missingWarn
            : true;
    // prettier-ignore
    let _fallbackWarn = __root
        ? __root.fallbackWarn
        : shared.isBoolean(options.fallbackWarn) || shared.isRegExp(options.fallbackWarn)
            ? options.fallbackWarn
            : true;
    // prettier-ignore
    let _fallbackRoot = __root
        ? __root.fallbackRoot
        : shared.isBoolean(options.fallbackRoot)
            ? options.fallbackRoot
            : true;
    // configure fall back to root
    let _fallbackFormat = !!options.fallbackFormat;
    // runtime missing
    let _missing = shared.isFunction(options.missing) ? options.missing : null;
    let _runtimeMissing = shared.isFunction(options.missing)
        ? defineCoreMissingHandler(options.missing)
        : null;
    // postTranslation handler
    let _postTranslation = shared.isFunction(options.postTranslation)
        ? options.postTranslation
        : null;
    let _warnHtmlMessage = shared.isBoolean(options.warnHtmlMessage)
        ? options.warnHtmlMessage
        : true;
    let _escapeParameter = !!options.escapeParameter;
    // custom linked modifiers
    // prettier-ignore
    const _modifiers = __root
        ? __root.modifiers
        : shared.isPlainObject(options.modifiers)
            ? options.modifiers
            : {};
    // pluralRules
    let _pluralRules = options.pluralRules || (__root && __root.pluralRules);
    // runtime context
    // eslint-disable-next-line prefer-const
    let _context;
    function getCoreContext() {
        const ctxOptions = {
            version: VERSION,
            locale: _locale.value,
            fallbackLocale: _fallbackLocale.value,
            messages: _messages.value,
            datetimeFormats: _datetimeFormats.value,
            numberFormats: _numberFormats.value,
            modifiers: _modifiers,
            pluralRules: _pluralRules,
            missing: _runtimeMissing === null ? undefined : _runtimeMissing,
            missingWarn: _missingWarn,
            fallbackWarn: _fallbackWarn,
            fallbackFormat: _fallbackFormat,
            unresolving: true,
            postTranslation: _postTranslation === null ? undefined : _postTranslation,
            warnHtmlMessage: _warnHtmlMessage,
            escapeParameter: _escapeParameter,
            messageResolver: options.messageResolver,
            __datetimeFormatters: shared.isPlainObject(_context)
                ? _context.__datetimeFormatters
                : undefined,
            __numberFormatters: shared.isPlainObject(_context)
                ? _context.__numberFormatters
                : undefined,
            __v_emitter: shared.isPlainObject(_context)
                ? _context.__v_emitter
                : undefined,
            __meta: { framework: 'vue' }
        };
        return coreBase.createCoreContext(ctxOptions);
    }
    _context = getCoreContext();
    coreBase.updateFallbackLocale(_context, _locale.value, _fallbackLocale.value);
    // track reactivity
    function trackReactivityValues() {
        return [
            _locale.value,
            _fallbackLocale.value,
            _messages.value,
            _datetimeFormats.value,
            _numberFormats.value
        ];
    }
    // locale
    const locale = vue.computed({
        get: () => _locale.value,
        set: val => {
            _locale.value = val;
            _context.locale = _locale.value;
        }
    });
    // fallbackLocale
    const fallbackLocale = vue.computed({
        get: () => _fallbackLocale.value,
        set: val => {
            _fallbackLocale.value = val;
            _context.fallbackLocale = _fallbackLocale.value;
            coreBase.updateFallbackLocale(_context, _locale.value, val);
        }
    });
    // messages
    const messages = vue.computed(() => _messages.value);
    // datetimeFormats
    const datetimeFormats = vue.computed(() => _datetimeFormats.value);
    // numberFormats
    const numberFormats = vue.computed(() => _numberFormats.value);
    // getPostTranslationHandler
    function getPostTranslationHandler() {
        return shared.isFunction(_postTranslation) ? _postTranslation : null;
    }
    // setPostTranslationHandler
    function setPostTranslationHandler(handler) {
        _postTranslation = handler;
        _context.postTranslation = handler;
    }
    // getMissingHandler
    function getMissingHandler() {
        return _missing;
    }
    // setMissingHandler
    function setMissingHandler(handler) {
        if (handler !== null) {
            _runtimeMissing = defineCoreMissingHandler(handler);
        }
        _missing = handler;
        _context.missing = _runtimeMissing;
    }
    function isResolvedTranslateMessage(type, arg // eslint-disable-line @typescript-eslint/no-explicit-any
    ) {
        return type !== 'translate' || !arg.resolvedMessage;
    }
    function wrapWithDeps(fn, argumentParser, warnType, fallbackSuccess, fallbackFail, successCondition) {
        trackReactivityValues(); // track reactive dependency
        // NOTE: experimental !!
        let ret;
        {
            try {
                coreBase.setAdditionalMeta(getMetaInfo());
                ret = fn(_context);
            }
            finally {
                coreBase.setAdditionalMeta(null);
            }
        }
        if (shared.isNumber(ret) && ret === coreBase.NOT_REOSLVED) {
            const [key, arg2] = argumentParser();
            if (__root &&
                shared.isString(key) &&
                isResolvedTranslateMessage(warnType, arg2)) {
                if (_fallbackRoot &&
                    (coreBase.isTranslateFallbackWarn(_fallbackWarn, key) ||
                        coreBase.isTranslateMissingWarn(_missingWarn, key))) {
                    shared.warn(getWarnMessage(I18nWarnCodes.FALLBACK_TO_ROOT, {
                        key,
                        type: warnType
                    }));
                }
                // for vue-devtools timeline event
                {
                    const { __v_emitter: emitter } = _context;
                    if (emitter && _fallbackRoot) {
                        emitter.emit("fallback" /* FALBACK */, {
                            type: warnType,
                            key,
                            to: 'global',
                            groupId: `${warnType}:${key}`
                        });
                    }
                }
            }
            return __root && _fallbackRoot
                ? fallbackSuccess(__root)
                : fallbackFail(key);
        }
        else if (successCondition(ret)) {
            return ret;
        }
        else {
            /* istanbul ignore next */
            throw createI18nError(I18nErrorCodes.UNEXPECTED_RETURN_TYPE);
        }
    }
    // t
    function t(...args) {
        return wrapWithDeps(context => Reflect.apply(coreBase.translate, null, [context, ...args]), () => coreBase.parseTranslateArgs(...args), 'translate', root => Reflect.apply(root.t, root, [...args]), key => key, val => shared.isString(val));
    }
    // rt
    function rt(...args) {
        const [arg1, arg2, arg3] = args;
        if (arg3 && !shared.isObject(arg3)) {
            throw createI18nError(I18nErrorCodes.INVALID_ARGUMENT);
        }
        return t(...[arg1, arg2, shared.assign({ resolvedMessage: true }, arg3 || {})]);
    }
    // d
    function d(...args) {
        return wrapWithDeps(context => Reflect.apply(coreBase.datetime, null, [context, ...args]), () => coreBase.parseDateTimeArgs(...args), 'datetime format', root => Reflect.apply(root.d, root, [...args]), () => coreBase.MISSING_RESOLVE_VALUE, val => shared.isString(val));
    }
    // n
    function n(...args) {
        return wrapWithDeps(context => Reflect.apply(coreBase.number, null, [context, ...args]), () => coreBase.parseNumberArgs(...args), 'number format', root => Reflect.apply(root.n, root, [...args]), () => coreBase.MISSING_RESOLVE_VALUE, val => shared.isString(val));
    }
    // for custom processor
    function normalize(values) {
        return values.map(val => shared.isString(val) ? vue.createVNode(vue.Text, null, val, 0) : val);
    }
    const interpolate = (val) => val;
    const processor = {
        normalize,
        interpolate,
        type: 'vnode'
    };
    // transrateVNode, using for `i18n-t` component
    function transrateVNode(...args) {
        return wrapWithDeps(context => {
            let ret;
            const _context = context;
            try {
                _context.processor = processor;
                ret = Reflect.apply(coreBase.translate, null, [_context, ...args]);
            }
            finally {
                _context.processor = null;
            }
            return ret;
        }, () => coreBase.parseTranslateArgs(...args), 'translate', 
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        root => root[TransrateVNodeSymbol](...args), key => [vue.createVNode(vue.Text, null, key, 0)], val => shared.isArray(val));
    }
    // numberParts, using for `i18n-n` component
    function numberParts(...args) {
        return wrapWithDeps(context => Reflect.apply(coreBase.number, null, [context, ...args]), () => coreBase.parseNumberArgs(...args), 'number format', 
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        root => root[NumberPartsSymbol](...args), () => [], val => shared.isString(val) || shared.isArray(val));
    }
    // datetimeParts, using for `i18n-d` component
    function datetimeParts(...args) {
        return wrapWithDeps(context => Reflect.apply(coreBase.datetime, null, [context, ...args]), () => coreBase.parseDateTimeArgs(...args), 'datetime format', 
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        root => root[DatetimePartsSymbol](...args), () => [], val => shared.isString(val) || shared.isArray(val));
    }
    function setPluralRules(rules) {
        _pluralRules = rules;
        _context.pluralRules = _pluralRules;
    }
    // te
    function te(key, locale) {
        const targetLocale = shared.isString(locale) ? locale : _locale.value;
        const message = getLocaleMessage(targetLocale);
        return _context.messageResolver(message, key) !== null;
    }
    function resolveMessages(key) {
        let messages = null;
        const locales = coreBase.getLocaleChain(_context, _fallbackLocale.value, _locale.value);
        for (let i = 0; i < locales.length; i++) {
            const targetLocaleMessages = _messages.value[locales[i]] || {};
            const messageValue = _context.messageResolver(targetLocaleMessages, key);
            if (messageValue != null) {
                messages = messageValue;
                break;
            }
        }
        return messages;
    }
    // tm
    function tm(key) {
        const messages = resolveMessages(key);
        // prettier-ignore
        return messages != null
            ? messages
            : __root
                ? __root.tm(key) || {}
                : {};
    }
    // getLocaleMessage
    function getLocaleMessage(locale) {
        return (_messages.value[locale] || {});
    }
    // setLocaleMessage
    function setLocaleMessage(locale, message) {
        _messages.value[locale] = message;
        _context.messages = _messages.value;
    }
    // mergeLocaleMessage
    function mergeLocaleMessage(locale, message) {
        _messages.value[locale] = _messages.value[locale] || {};
        deepCopy(message, _messages.value[locale]);
        _context.messages = _messages.value;
    }
    // getDateTimeFormat
    function getDateTimeFormat(locale) {
        return _datetimeFormats.value[locale] || {};
    }
    // setDateTimeFormat
    function setDateTimeFormat(locale, format) {
        _datetimeFormats.value[locale] = format;
        _context.datetimeFormats = _datetimeFormats.value;
        coreBase.clearDateTimeFormat(_context, locale, format);
    }
    // mergeDateTimeFormat
    function mergeDateTimeFormat(locale, format) {
        _datetimeFormats.value[locale] = shared.assign(_datetimeFormats.value[locale] || {}, format);
        _context.datetimeFormats = _datetimeFormats.value;
        coreBase.clearDateTimeFormat(_context, locale, format);
    }
    // getNumberFormat
    function getNumberFormat(locale) {
        return _numberFormats.value[locale] || {};
    }
    // setNumberFormat
    function setNumberFormat(locale, format) {
        _numberFormats.value[locale] = format;
        _context.numberFormats = _numberFormats.value;
        coreBase.clearNumberFormat(_context, locale, format);
    }
    // mergeNumberFormat
    function mergeNumberFormat(locale, format) {
        _numberFormats.value[locale] = shared.assign(_numberFormats.value[locale] || {}, format);
        _context.numberFormats = _numberFormats.value;
        coreBase.clearNumberFormat(_context, locale, format);
    }
    // for debug
    composerID++;
    // watch root locale & fallbackLocale
    if (__root) {
        vue.watch(__root.locale, (val) => {
            if (_inheritLocale) {
                _locale.value = val;
                _context.locale = val;
                coreBase.updateFallbackLocale(_context, _locale.value, _fallbackLocale.value);
            }
        });
        vue.watch(__root.fallbackLocale, (val) => {
            if (_inheritLocale) {
                _fallbackLocale.value = val;
                _context.fallbackLocale = val;
                coreBase.updateFallbackLocale(_context, _locale.value, _fallbackLocale.value);
            }
        });
    }
    // define composition API!
    const composer = {
        id: composerID,
        locale,
        fallbackLocale,
        get inheritLocale() {
            return _inheritLocale;
        },
        set inheritLocale(val) {
            _inheritLocale = val;
            if (val && __root) {
                _locale.value = __root.locale.value;
                _fallbackLocale.value = __root.fallbackLocale.value;
                coreBase.updateFallbackLocale(_context, _locale.value, _fallbackLocale.value);
            }
        },
        get availableLocales() {
            return Object.keys(_messages.value).sort();
        },
        messages,
        datetimeFormats,
        numberFormats,
        get modifiers() {
            return _modifiers;
        },
        get pluralRules() {
            return _pluralRules || {};
        },
        get isGlobal() {
            return _isGlobal;
        },
        get missingWarn() {
            return _missingWarn;
        },
        set missingWarn(val) {
            _missingWarn = val;
            _context.missingWarn = _missingWarn;
        },
        get fallbackWarn() {
            return _fallbackWarn;
        },
        set fallbackWarn(val) {
            _fallbackWarn = val;
            _context.fallbackWarn = _fallbackWarn;
        },
        get fallbackRoot() {
            return _fallbackRoot;
        },
        set fallbackRoot(val) {
            _fallbackRoot = val;
        },
        get fallbackFormat() {
            return _fallbackFormat;
        },
        set fallbackFormat(val) {
            _fallbackFormat = val;
            _context.fallbackFormat = _fallbackFormat;
        },
        get warnHtmlMessage() {
            return _warnHtmlMessage;
        },
        set warnHtmlMessage(val) {
            _warnHtmlMessage = val;
            _context.warnHtmlMessage = val;
        },
        get escapeParameter() {
            return _escapeParameter;
        },
        set escapeParameter(val) {
            _escapeParameter = val;
            _context.escapeParameter = val;
        },
        t,
        rt,
        d,
        n,
        te,
        tm,
        getLocaleMessage,
        setLocaleMessage,
        mergeLocaleMessage,
        getDateTimeFormat,
        setDateTimeFormat,
        mergeDateTimeFormat,
        getNumberFormat,
        setNumberFormat,
        mergeNumberFormat,
        getPostTranslationHandler,
        setPostTranslationHandler,
        getMissingHandler,
        setMissingHandler,
        [TransrateVNodeSymbol]: transrateVNode,
        [NumberPartsSymbol]: numberParts,
        [DatetimePartsSymbol]: datetimeParts,
        [SetPluralRulesSymbol]: setPluralRules
    };
    // for vue-devtools timeline event
    {
        composer[EnableEmitter] = (emitter) => {
            _context.__v_emitter = emitter;
        };
        composer[DisableEmitter] = () => {
            _context.__v_emitter = undefined;
        };
    }
    return composer;
}
/* eslint-enable @typescript-eslint/no-explicit-any */

/* eslint-disable @typescript-eslint/no-explicit-any */
/**
 * Convert to I18n Composer Options from VueI18n Options
 *
 * @internal
 */
function convertComposerOptions(options) {
    const locale = shared.isString(options.locale) ? options.locale : 'en-US';
    const fallbackLocale = shared.isString(options.fallbackLocale) ||
        shared.isArray(options.fallbackLocale) ||
        shared.isPlainObject(options.fallbackLocale) ||
        options.fallbackLocale === false
        ? options.fallbackLocale
        : locale;
    const missing = shared.isFunction(options.missing) ? options.missing : undefined;
    const missingWarn = shared.isBoolean(options.silentTranslationWarn) ||
        shared.isRegExp(options.silentTranslationWarn)
        ? !options.silentTranslationWarn
        : true;
    const fallbackWarn = shared.isBoolean(options.silentFallbackWarn) ||
        shared.isRegExp(options.silentFallbackWarn)
        ? !options.silentFallbackWarn
        : true;
    const fallbackRoot = shared.isBoolean(options.fallbackRoot)
        ? options.fallbackRoot
        : true;
    const fallbackFormat = !!options.formatFallbackMessages;
    const modifiers = shared.isPlainObject(options.modifiers) ? options.modifiers : {};
    const pluralizationRules = options.pluralizationRules;
    const postTranslation = shared.isFunction(options.postTranslation)
        ? options.postTranslation
        : undefined;
    const warnHtmlMessage = shared.isString(options.warnHtmlInMessage)
        ? options.warnHtmlInMessage !== 'off'
        : true;
    const escapeParameter = !!options.escapeParameterHtml;
    const inheritLocale = shared.isBoolean(options.sync) ? options.sync : true;
    if (options.formatter) {
        shared.warn(getWarnMessage(I18nWarnCodes.NOT_SUPPORTED_FORMATTER));
    }
    if (options.preserveDirectiveContent) {
        shared.warn(getWarnMessage(I18nWarnCodes.NOT_SUPPORTED_PRESERVE_DIRECTIVE));
    }
    let messages = options.messages;
    if (shared.isPlainObject(options.sharedMessages)) {
        const sharedMessages = options.sharedMessages;
        const locales = Object.keys(sharedMessages);
        messages = locales.reduce((messages, locale) => {
            const message = messages[locale] || (messages[locale] = {});
            shared.assign(message, sharedMessages[locale]);
            return messages;
        }, (messages || {}));
    }
    const { __i18n, __root } = options;
    const datetimeFormats = options.datetimeFormats;
    const numberFormats = options.numberFormats;
    const flatJson = options.flatJson;
    return {
        locale,
        fallbackLocale,
        messages,
        flatJson,
        datetimeFormats,
        numberFormats,
        missing,
        missingWarn,
        fallbackWarn,
        fallbackRoot,
        fallbackFormat,
        modifiers,
        pluralRules: pluralizationRules,
        postTranslation,
        warnHtmlMessage,
        escapeParameter,
        messageResolver: options.messageResolver,
        inheritLocale,
        __i18n,
        __root
    };
}
/**
 * create VueI18n interface factory
 *
 * @internal
 */
function createVueI18n(options = {}) {
    const composer = createComposer(convertComposerOptions(options));
    // defines VueI18n
    const vueI18n = {
        // id
        id: composer.id,
        // locale
        get locale() {
            return composer.locale.value;
        },
        set locale(val) {
            composer.locale.value = val;
        },
        // fallbackLocale
        get fallbackLocale() {
            return composer.fallbackLocale.value;
        },
        set fallbackLocale(val) {
            composer.fallbackLocale.value = val;
        },
        // messages
        get messages() {
            return composer.messages.value;
        },
        // datetimeFormats
        get datetimeFormats() {
            return composer.datetimeFormats.value;
        },
        // numberFormats
        get numberFormats() {
            return composer.numberFormats.value;
        },
        // availableLocales
        get availableLocales() {
            return composer.availableLocales;
        },
        // formatter
        get formatter() {
            shared.warn(getWarnMessage(I18nWarnCodes.NOT_SUPPORTED_FORMATTER));
            // dummy
            return {
                interpolate() {
                    return [];
                }
            };
        },
        set formatter(val) {
            shared.warn(getWarnMessage(I18nWarnCodes.NOT_SUPPORTED_FORMATTER));
        },
        // missing
        get missing() {
            return composer.getMissingHandler();
        },
        set missing(handler) {
            composer.setMissingHandler(handler);
        },
        // silentTranslationWarn
        get silentTranslationWarn() {
            return shared.isBoolean(composer.missingWarn)
                ? !composer.missingWarn
                : composer.missingWarn;
        },
        set silentTranslationWarn(val) {
            composer.missingWarn = shared.isBoolean(val) ? !val : val;
        },
        // silentFallbackWarn
        get silentFallbackWarn() {
            return shared.isBoolean(composer.fallbackWarn)
                ? !composer.fallbackWarn
                : composer.fallbackWarn;
        },
        set silentFallbackWarn(val) {
            composer.fallbackWarn = shared.isBoolean(val) ? !val : val;
        },
        // modifiers
        get modifiers() {
            return composer.modifiers;
        },
        // formatFallbackMessages
        get formatFallbackMessages() {
            return composer.fallbackFormat;
        },
        set formatFallbackMessages(val) {
            composer.fallbackFormat = val;
        },
        // postTranslation
        get postTranslation() {
            return composer.getPostTranslationHandler();
        },
        set postTranslation(handler) {
            composer.setPostTranslationHandler(handler);
        },
        // sync
        get sync() {
            return composer.inheritLocale;
        },
        set sync(val) {
            composer.inheritLocale = val;
        },
        // warnInHtmlMessage
        get warnHtmlInMessage() {
            return composer.warnHtmlMessage ? 'warn' : 'off';
        },
        set warnHtmlInMessage(val) {
            composer.warnHtmlMessage = val !== 'off';
        },
        // escapeParameterHtml
        get escapeParameterHtml() {
            return composer.escapeParameter;
        },
        set escapeParameterHtml(val) {
            composer.escapeParameter = val;
        },
        // preserveDirectiveContent
        get preserveDirectiveContent() {
            shared.warn(getWarnMessage(I18nWarnCodes.NOT_SUPPORTED_PRESERVE_DIRECTIVE));
            return true;
        },
        set preserveDirectiveContent(val) {
            shared.warn(getWarnMessage(I18nWarnCodes.NOT_SUPPORTED_PRESERVE_DIRECTIVE));
        },
        // pluralizationRules
        get pluralizationRules() {
            return composer.pluralRules || {};
        },
        // for internal
        __composer: composer,
        // t
        t(...args) {
            const [arg1, arg2, arg3] = args;
            const options = {};
            let list = null;
            let named = null;
            if (!shared.isString(arg1)) {
                throw createI18nError(I18nErrorCodes.INVALID_ARGUMENT);
            }
            const key = arg1;
            if (shared.isString(arg2)) {
                options.locale = arg2;
            }
            else if (shared.isArray(arg2)) {
                list = arg2;
            }
            else if (shared.isPlainObject(arg2)) {
                named = arg2;
            }
            if (shared.isArray(arg3)) {
                list = arg3;
            }
            else if (shared.isPlainObject(arg3)) {
                named = arg3;
            }
            // return composer.t(key, (list || named || {}) as any, options)
            return Reflect.apply(composer.t, composer, [
                key,
                (list || named || {}),
                options
            ]);
        },
        rt(...args) {
            return Reflect.apply(composer.rt, composer, [...args]);
        },
        // tc
        tc(...args) {
            const [arg1, arg2, arg3] = args;
            const options = { plural: 1 };
            let list = null;
            let named = null;
            if (!shared.isString(arg1)) {
                throw createI18nError(I18nErrorCodes.INVALID_ARGUMENT);
            }
            const key = arg1;
            if (shared.isString(arg2)) {
                options.locale = arg2;
            }
            else if (shared.isNumber(arg2)) {
                options.plural = arg2;
            }
            else if (shared.isArray(arg2)) {
                list = arg2;
            }
            else if (shared.isPlainObject(arg2)) {
                named = arg2;
            }
            if (shared.isString(arg3)) {
                options.locale = arg3;
            }
            else if (shared.isArray(arg3)) {
                list = arg3;
            }
            else if (shared.isPlainObject(arg3)) {
                named = arg3;
            }
            // return composer.t(key, (list || named || {}) as any, options)
            return Reflect.apply(composer.t, composer, [
                key,
                (list || named || {}),
                options
            ]);
        },
        // te
        te(key, locale) {
            return composer.te(key, locale);
        },
        // tm
        tm(key) {
            return composer.tm(key);
        },
        // getLocaleMessage
        getLocaleMessage(locale) {
            return composer.getLocaleMessage(locale);
        },
        // setLocaleMessage
        setLocaleMessage(locale, message) {
            composer.setLocaleMessage(locale, message);
        },
        // mergeLocaleMessage
        mergeLocaleMessage(locale, message) {
            composer.mergeLocaleMessage(locale, message);
        },
        // d
        d(...args) {
            return Reflect.apply(composer.d, composer, [...args]);
        },
        // getDateTimeFormat
        getDateTimeFormat(locale) {
            return composer.getDateTimeFormat(locale);
        },
        // setDateTimeFormat
        setDateTimeFormat(locale, format) {
            composer.setDateTimeFormat(locale, format);
        },
        // mergeDateTimeFormat
        mergeDateTimeFormat(locale, format) {
            composer.mergeDateTimeFormat(locale, format);
        },
        // n
        n(...args) {
            return Reflect.apply(composer.n, composer, [...args]);
        },
        // getNumberFormat
        getNumberFormat(locale) {
            return composer.getNumberFormat(locale);
        },
        // setNumberFormat
        setNumberFormat(locale, format) {
            composer.setNumberFormat(locale, format);
        },
        // mergeNumberFormat
        mergeNumberFormat(locale, format) {
            composer.mergeNumberFormat(locale, format);
        },
        // getChoiceIndex
        // eslint-disable-next-line @typescript-eslint/no-unused-vars
        getChoiceIndex(choice, choicesLength) {
            shared.warn(getWarnMessage(I18nWarnCodes.NOT_SUPPORTED_GET_CHOICE_INDEX));
            return -1;
        },
        // for internal
        __onComponentInstanceCreated(target) {
            const { componentInstanceCreatedListener } = options;
            if (componentInstanceCreatedListener) {
                componentInstanceCreatedListener(target, vueI18n);
            }
        }
    };
    // for vue-devtools timeline event
    {
        vueI18n.__enableEmitter = (emitter) => {
            const __composer = composer;
            __composer[EnableEmitter] && __composer[EnableEmitter](emitter);
        };
        vueI18n.__disableEmitter = () => {
            const __composer = composer;
            __composer[DisableEmitter] && __composer[DisableEmitter]();
        };
    }
    return vueI18n;
}
/* eslint-enable @typescript-eslint/no-explicit-any */

const baseFormatProps = {
    tag: {
        type: [String, Object]
    },
    locale: {
        type: String
    },
    scope: {
        type: String,
        // NOTE: avoid https://github.com/microsoft/rushstack/issues/1050
        validator: (val /* ComponetI18nScope */) => val === 'parent' || val === 'global',
        default: 'parent' /* ComponetI18nScope */
    },
    i18n: {
        type: Object
    }
};

/**
 * Translation Component
 *
 * @remarks
 * See the following items for property about details
 *
 * @VueI18nSee [TranslationProps](component#translationprops)
 * @VueI18nSee [BaseFormatProps](component#baseformatprops)
 * @VueI18nSee [Component Interpolation](../guide/advanced/component)
 *
 * @example
 * ```html
 * <div id="app">
 *   <!-- ... -->
 *   <i18n path="term" tag="label" for="tos">
 *     <a :href="url" target="_blank">{{ $t('tos') }}</a>
 *   </i18n>
 *   <!-- ... -->
 * </div>
 * ```
 * ```js
 * import { createApp } from 'vue'
 * import { createI18n } from 'vue-i18n'
 *
 * const messages = {
 *   en: {
 *     tos: 'Term of Service',
 *     term: 'I accept xxx {0}.'
 *   },
 *   ja: {
 *     tos: '利用規約',
 *     term: '私は xxx の{0}に同意します。'
 *   }
 * }
 *
 * const i18n = createI18n({
 *   locale: 'en',
 *   messages
 * })
 *
 * const app = createApp({
 *   data: {
 *     url: '/term'
 *   }
 * }).use(i18n).mount('#app')
 * ```
 *
 * @VueI18nComponent
 */
const Translation = {
    /* eslint-disable */
    name: 'i18n-t',
    props: shared.assign({
        keypath: {
            type: String,
            required: true
        },
        plural: {
            type: [Number, String],
            // eslint-disable-next-line @typescript-eslint/no-explicit-any
            validator: (val) => shared.isNumber(val) || !isNaN(val)
        }
    }, baseFormatProps),
    /* eslint-enable */
    setup(props, context) {
        const { slots, attrs } = context;
        const i18n = props.i18n ||
            useI18n({ useScope: props.scope });
        const keys = Object.keys(slots).filter(key => key !== '_');
        return () => {
            const options = {};
            if (props.locale) {
                options.locale = props.locale;
            }
            if (props.plural !== undefined) {
                options.plural = shared.isString(props.plural) ? +props.plural : props.plural;
            }
            const arg = getInterpolateArg(context, keys);
            // eslint-disable-next-line @typescript-eslint/no-explicit-any
            const children = i18n[TransrateVNodeSymbol](props.keypath, arg, options);
            const assignedAttrs = shared.assign({}, attrs);
            return shared.isString(props.tag) || shared.isObject(props.tag)
                ? vue.h(props.tag, assignedAttrs, children)
                : vue.h(vue.Fragment, assignedAttrs, children);
        };
    }
};
function getInterpolateArg({ slots }, keys) {
    if (keys.length === 1 && keys[0] === 'default') {
        // default slot only
        return slots.default ? slots.default() : [];
    }
    else {
        // named slots
        return keys.reduce((arg, key) => {
            const slot = slots[key];
            if (slot) {
                arg[key] = slot();
            }
            return arg;
        }, {});
    }
}

function renderFormatter(props, context, slotKeys, partFormatter) {
    const { slots, attrs } = context;
    return () => {
        const options = { part: true };
        let overrides = {};
        if (props.locale) {
            options.locale = props.locale;
        }
        if (shared.isString(props.format)) {
            options.key = props.format;
        }
        else if (shared.isObject(props.format)) {
            // eslint-disable-next-line @typescript-eslint/no-explicit-any
            if (shared.isString(props.format.key)) {
                // eslint-disable-next-line @typescript-eslint/no-explicit-any
                options.key = props.format.key;
            }
            // Filter out number format options only
            overrides = Object.keys(props.format).reduce((options, prop) => {
                return slotKeys.includes(prop)
                    ? shared.assign({}, options, { [prop]: props.format[prop] }) // eslint-disable-line @typescript-eslint/no-explicit-any
                    : options;
            }, {});
        }
        const parts = partFormatter(...[props.value, options, overrides]);
        let children = [options.key];
        if (shared.isArray(parts)) {
            children = parts.map((part, index) => {
                const slot = slots[part.type];
                return slot
                    ? slot({ [part.type]: part.value, index, parts })
                    : [part.value];
            });
        }
        else if (shared.isString(parts)) {
            children = [parts];
        }
        const assignedAttrs = shared.assign({}, attrs);
        return shared.isString(props.tag) || shared.isObject(props.tag)
            ? vue.h(props.tag, assignedAttrs, children)
            : vue.h(vue.Fragment, assignedAttrs, children);
    };
}

const NUMBER_FORMAT_KEYS = [
    'localeMatcher',
    'style',
    'unit',
    'unitDisplay',
    'currency',
    'currencyDisplay',
    'useGrouping',
    'numberingSystem',
    'minimumIntegerDigits',
    'minimumFractionDigits',
    'maximumFractionDigits',
    'minimumSignificantDigits',
    'maximumSignificantDigits',
    'notation',
    'formatMatcher'
];
/**
 * Number Format Component
 *
 * @remarks
 * See the following items for property about details
 *
 * @VueI18nSee [FormattableProps](component#formattableprops)
 * @VueI18nSee [BaseFormatProps](component#baseformatprops)
 * @VueI18nSee [Custom Formatting](../guide/essentials/number#custom-formatting)
 *
 * @VueI18nDanger
 * Not supported IE, due to no support `Intl.NumberFormat#formatToParts` in [IE](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/NumberFormat/formatToParts)
 *
 * If you want to use it, you need to use [polyfill](https://github.com/formatjs/formatjs/tree/main/packages/intl-numberformat)
 *
 * @VueI18nComponent
 */
const NumberFormat = {
    /* eslint-disable */
    name: 'i18n-n',
    props: shared.assign({
        value: {
            type: Number,
            required: true
        },
        format: {
            type: [String, Object]
        }
    }, baseFormatProps),
    /* eslint-enable */
    setup(props, context) {
        const i18n = props.i18n ||
            useI18n({ useScope: 'parent' });
        return renderFormatter(props, context, NUMBER_FORMAT_KEYS, (...args) => 
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        i18n[NumberPartsSymbol](...args));
    }
};

const DATETIME_FORMAT_KEYS = [
    'dateStyle',
    'timeStyle',
    'fractionalSecondDigits',
    'calendar',
    'dayPeriod',
    'numberingSystem',
    'localeMatcher',
    'timeZone',
    'hour12',
    'hourCycle',
    'formatMatcher',
    'weekday',
    'era',
    'year',
    'month',
    'day',
    'hour',
    'minute',
    'second',
    'timeZoneName'
];
/**
 * Datetime Format Component
 *
 * @remarks
 * See the following items for property about details
 *
 * @VueI18nSee [FormattableProps](component#formattableprops)
 * @VueI18nSee [BaseFormatProps](component#baseformatprops)
 * @VueI18nSee [Custom Formatting](../guide/essentials/datetime#custom-formatting)
 *
 * @VueI18nDanger
 * Not supported IE, due to no support `Intl.DateTimeFormat#formatToParts` in [IE](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DateTimeFormat/formatToParts)
 *
 * If you want to use it, you need to use [polyfill](https://github.com/formatjs/formatjs/tree/main/packages/intl-datetimeformat)
 *
 * @VueI18nComponent
 */
const DatetimeFormat = {
    /* eslint-disable */
    name: 'i18n-d',
    props: shared.assign({
        value: {
            type: [Number, Date],
            required: true
        },
        format: {
            type: [String, Object]
        }
    }, baseFormatProps),
    /* eslint-enable */
    setup(props, context) {
        const i18n = props.i18n ||
            useI18n({ useScope: 'parent' });
        return renderFormatter(props, context, DATETIME_FORMAT_KEYS, (...args) => 
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        i18n[DatetimePartsSymbol](...args));
    }
};

function getComposer$1(i18n, instance) {
    const i18nInternal = i18n;
    if (i18n.mode === 'composition') {
        return (i18nInternal.__getInstance(instance) || i18n.global);
    }
    else {
        const vueI18n = i18nInternal.__getInstance(instance);
        return vueI18n != null
            ? vueI18n.__composer
            : i18n.global.__composer;
    }
}
function vTDirective(i18n) {
    const bind = (el, { instance, value, modifiers }) => {
        /* istanbul ignore if */
        if (!instance || !instance.$) {
            throw createI18nError(I18nErrorCodes.UNEXPECTED_ERROR);
        }
        const composer = getComposer$1(i18n, instance.$);
        if (modifiers.preserve) {
            shared.warn(getWarnMessage(I18nWarnCodes.NOT_SUPPORTED_PRESERVE));
        }
        const parsedValue = parseValue(value);
        // el.textContent = composer.t(...makeParams(parsedValue))
        el.textContent = Reflect.apply(composer.t, composer, [
            ...makeParams(parsedValue)
        ]);
    };
    return {
        beforeMount: bind,
        beforeUpdate: bind
    };
}
function parseValue(value) {
    if (shared.isString(value)) {
        return { path: value };
    }
    else if (shared.isPlainObject(value)) {
        if (!('path' in value)) {
            throw createI18nError(I18nErrorCodes.REQUIRED_VALUE, 'path');
        }
        return value;
    }
    else {
        throw createI18nError(I18nErrorCodes.INVALID_VALUE);
    }
}
function makeParams(value) {
    const { path, locale, args, choice, plural } = value;
    const options = {};
    const named = args || {};
    if (shared.isString(locale)) {
        options.locale = locale;
    }
    if (shared.isNumber(choice)) {
        options.plural = choice;
    }
    if (shared.isNumber(plural)) {
        options.plural = plural;
    }
    return [path, named, options];
}

function apply(app, i18n, ...options) {
    const pluginOptions = shared.isPlainObject(options[0])
        ? options[0]
        : {};
    const useI18nComponentName = !!pluginOptions.useI18nComponentName;
    const globalInstall = shared.isBoolean(pluginOptions.globalInstall)
        ? pluginOptions.globalInstall
        : true;
    if (globalInstall && useI18nComponentName) {
        shared.warn(getWarnMessage(I18nWarnCodes.COMPONENT_NAME_LEGACY_COMPATIBLE, {
            name: Translation.name
        }));
    }
    if (globalInstall) {
        // install components
        app.component(!useI18nComponentName ? Translation.name : 'i18n', Translation);
        app.component(NumberFormat.name, NumberFormat);
        app.component(DatetimeFormat.name, DatetimeFormat);
    }
    // install directive
    app.directive('t', vTDirective(i18n));
}

// supports compatibility for legacy vue-i18n APIs
function defineMixin(vuei18n, composer, i18n) {
    return {
        beforeCreate() {
            const instance = vue.getCurrentInstance();
            /* istanbul ignore if */
            if (!instance) {
                throw createI18nError(I18nErrorCodes.UNEXPECTED_ERROR);
            }
            const options = this.$options;
            if (options.i18n) {
                const optionsI18n = options.i18n;
                if (options.__i18n) {
                    optionsI18n.__i18n = options.__i18n;
                }
                optionsI18n.__root = composer;
                if (this === this.$root) {
                    // TODO;
                    this.$i18n = mergeToRoot(vuei18n, optionsI18n);
                }
                else {
                    this.$i18n = createVueI18n(optionsI18n);
                }
            }
            else if (options.__i18n) {
                if (this === this.$root) {
                    this.$i18n = mergeToRoot(vuei18n, options);
                }
                else {
                    this.$i18n = createVueI18n({
                        __i18n: options.__i18n,
                        __root: composer
                    });
                }
            }
            else {
                // set global
                this.$i18n = vuei18n;
            }
            vuei18n.__onComponentInstanceCreated(this.$i18n);
            i18n.__setInstance(instance, this.$i18n);
            // defines vue-i18n legacy APIs
            this.$t = (...args) => this.$i18n.t(...args);
            this.$rt = (...args) => this.$i18n.rt(...args);
            this.$tc = (...args) => this.$i18n.tc(...args);
            this.$te = (key, locale) => this.$i18n.te(key, locale);
            this.$d = (...args) => this.$i18n.d(...args);
            this.$n = (...args) => this.$i18n.n(...args);
            this.$tm = (key) => this.$i18n.tm(key);
        },
        mounted() {
        },
        unmounted() {
            const instance = vue.getCurrentInstance();
            /* istanbul ignore if */
            if (!instance) {
                throw createI18nError(I18nErrorCodes.UNEXPECTED_ERROR);
            }
            vue.nextTick(() => {
                delete this.$t;
                delete this.$rt;
                delete this.$tc;
                delete this.$te;
                delete this.$d;
                delete this.$n;
                delete this.$tm;
                i18n.__deleteInstance(instance);
                delete this.$i18n;
            });
        }
    };
}
function mergeToRoot(root, options) {
    root.locale = options.locale || root.locale;
    root.fallbackLocale = options.fallbackLocale || root.fallbackLocale;
    root.missing = options.missing || root.missing;
    root.silentTranslationWarn =
        options.silentTranslationWarn || root.silentFallbackWarn;
    root.silentFallbackWarn =
        options.silentFallbackWarn || root.silentFallbackWarn;
    root.formatFallbackMessages =
        options.formatFallbackMessages || root.formatFallbackMessages;
    root.postTranslation = options.postTranslation || root.postTranslation;
    root.warnHtmlInMessage = options.warnHtmlInMessage || root.warnHtmlInMessage;
    root.escapeParameterHtml =
        options.escapeParameterHtml || root.escapeParameterHtml;
    root.sync = options.sync || root.sync;
    root.__composer[SetPluralRulesSymbol](options.pluralizationRules || root.pluralizationRules);
    const messages = getLocaleMessages(root.locale, {
        messages: options.messages,
        __i18n: options.__i18n
    });
    Object.keys(messages).forEach(locale => 
    // TODO:
    root.mergeLocaleMessage(locale, messages[locale]));
    if (options.datetimeFormats) {
        Object.keys(options.datetimeFormats).forEach(locale => root.mergeDateTimeFormat(locale, options.datetimeFormats[locale]));
    }
    if (options.numberFormats) {
        Object.keys(options.numberFormats).forEach(locale => root.mergeNumberFormat(locale, options.numberFormats[locale]));
    }
    return root;
}

// eslint-disable-next-line @typescript-eslint/no-explicit-any
function createI18n(options = {}) {
    // prettier-ignore
    const __legacyMode = shared.isBoolean(options.legacy)
        ? options.legacy
        : true;
    const __globalInjection = !!options.globalInjection;
    const __instances = new Map();
    // prettier-ignore
    const __global = __legacyMode
        ? createVueI18n(options)
        : createComposer(options);
    const symbol = shared.makeSymbol('vue-i18n' );
    const i18n = {
        // mode
        get mode() {
            return __legacyMode ? 'legacy' : 'composition';
        },
        // install plugin
        async install(app, ...options) {
            // setup global provider
            app.__VUE_I18N_SYMBOL__ = symbol;
            app.provide(app.__VUE_I18N_SYMBOL__, i18n);
            // global method and properties injection for Composition API
            if (!__legacyMode && __globalInjection) {
                injectGlobalFields(app, i18n.global);
            }
            // install built-in components and directive
            {
                apply(app, i18n, ...options);
            }
            // setup mixin for Legacy API
            if (__legacyMode) {
                app.mixin(defineMixin(__global, __global.__composer, i18n));
            }
        },
        // global accessor
        get global() {
            return __global;
        },
        // @internal
        __instances,
        // @internal
        __getInstance(component) {
            return __instances.get(component) || null;
        },
        // @internal
        __setInstance(component, instance) {
            __instances.set(component, instance);
        },
        // @internal
        __deleteInstance(component) {
            __instances.delete(component);
        }
    };
    return i18n;
}
// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
function useI18n(options = {}) {
    const instance = vue.getCurrentInstance();
    if (instance == null) {
        throw createI18nError(I18nErrorCodes.MUST_BE_CALL_SETUP_TOP);
    }
    if (!instance.appContext.app.__VUE_I18N_SYMBOL__) {
        throw createI18nError(I18nErrorCodes.NOT_INSLALLED);
    }
    const i18n = vue.inject(instance.appContext.app.__VUE_I18N_SYMBOL__);
    /* istanbul ignore if */
    if (!i18n) {
        throw createI18nError(I18nErrorCodes.UNEXPECTED_ERROR);
    }
    // prettier-ignore
    const global = i18n.mode === 'composition'
        ? i18n.global
        : i18n.global.__composer;
    // prettier-ignore
    const scope = shared.isEmptyObject(options)
        ? ('__i18n' in instance.type)
            ? 'local'
            : 'global'
        : !options.useScope
            ? 'local'
            : options.useScope;
    if (scope === 'global') {
        let messages = shared.isObject(options.messages) ? options.messages : {};
        if ('__i18nGlobal' in instance.type) {
            messages = getLocaleMessages(global.locale.value, {
                messages,
                __i18n: instance.type.__i18nGlobal
            });
        }
        // merge locale messages
        const locales = Object.keys(messages);
        if (locales.length) {
            locales.forEach(locale => {
                global.mergeLocaleMessage(locale, messages[locale]);
            });
        }
        // merge datetime formats
        if (shared.isObject(options.datetimeFormats)) {
            const locales = Object.keys(options.datetimeFormats);
            if (locales.length) {
                locales.forEach(locale => {
                    global.mergeDateTimeFormat(locale, options.datetimeFormats[locale]);
                });
            }
        }
        // merge number formats
        if (shared.isObject(options.numberFormats)) {
            const locales = Object.keys(options.numberFormats);
            if (locales.length) {
                locales.forEach(locale => {
                    global.mergeNumberFormat(locale, options.numberFormats[locale]);
                });
            }
        }
        return global;
    }
    if (scope === 'parent') {
        let composer = getComposer(i18n, instance);
        if (composer == null) {
            {
                shared.warn(getWarnMessage(I18nWarnCodes.NOT_FOUND_PARENT_SCOPE));
            }
            composer = global;
        }
        return composer;
    }
    // scope 'local' case
    if (i18n.mode === 'legacy') {
        throw createI18nError(I18nErrorCodes.NOT_AVAILABLE_IN_LEGACY_MODE);
    }
    const i18nInternal = i18n;
    let composer = i18nInternal.__getInstance(instance);
    if (composer == null) {
        const type = instance.type;
        const composerOptions = shared.assign({}, options);
        if (type.__i18n) {
            composerOptions.__i18n = type.__i18n;
        }
        if (global) {
            composerOptions.__root = global;
        }
        composer = createComposer(composerOptions);
        setupLifeCycle(i18nInternal, instance);
        i18nInternal.__setInstance(instance, composer);
    }
    return composer;
}
function getComposer(i18n, target) {
    let composer = null;
    const root = target.root;
    let current = target.parent;
    while (current != null) {
        const i18nInternal = i18n;
        if (i18n.mode === 'composition') {
            composer = i18nInternal.__getInstance(current);
        }
        else {
            const vueI18n = i18nInternal.__getInstance(current);
            if (vueI18n != null) {
                composer = vueI18n.__composer;
            }
        }
        if (composer != null) {
            break;
        }
        if (root === current) {
            break;
        }
        current = current.parent;
    }
    return composer;
}
function setupLifeCycle(i18n, target, composer) {
    vue.onMounted(() => {
    }, target);
    vue.onUnmounted(() => {
        i18n.__deleteInstance(target);
    }, target);
}
const globalExportProps = [
    'locale',
    'fallbackLocale',
    'availableLocales'
];
const globalExportMethods = ['t', 'rt', 'd', 'n', 'tm'];
function injectGlobalFields(app, composer) {
    const i18n = Object.create(null);
    globalExportProps.forEach(prop => {
        const desc = Object.getOwnPropertyDescriptor(composer, prop);
        if (!desc) {
            throw createI18nError(I18nErrorCodes.UNEXPECTED_ERROR);
        }
        const wrap = vue.isRef(desc.value) // check computed props
            ? {
                get() {
                    return desc.value.value;
                },
                // eslint-disable-next-line @typescript-eslint/no-explicit-any
                set(val) {
                    desc.value.value = val;
                }
            }
            : {
                get() {
                    return desc.get && desc.get();
                }
            };
        Object.defineProperty(i18n, prop, wrap);
    });
    app.config.globalProperties.$i18n = i18n;
    globalExportMethods.forEach(method => {
        const desc = Object.getOwnPropertyDescriptor(composer, method);
        if (!desc || !desc.value) {
            throw createI18nError(I18nErrorCodes.UNEXPECTED_ERROR);
        }
        Object.defineProperty(app.config.globalProperties, `$${method}`, desc);
    });
}

// register message compiler at vue-i18n
coreBase.registerMessageCompiler(coreBase.compileToFunction);
// NOTE: experimental !!
{
    const target = shared.getGlobalThis();
    target.__INTLIFY__ = true;
    coreBase.setDevToolsHook(target.__INTLIFY_DEVTOOLS_GLOBAL_HOOK__);
}

exports.DatetimeFormat = DatetimeFormat;
exports.NumberFormat = NumberFormat;
exports.Translation = Translation;
exports.VERSION = VERSION;
exports.createI18n = createI18n;
exports.useI18n = useI18n;
exports.vTDirective = vTDirective;
