/*!
  * @intlify/core-base v9.1.7
  * (c) 2021 kazuya kawaguchi
  * Released under the MIT License.
  */
import { format, isString, isArray, isPlainObject, assign, isFunction, isBoolean, isRegExp, warn, isObject, escapeHtml, inBrowser, mark, measure, generateCodeFrame, generateFormatCacheKey, isNumber, isEmptyObject, isDate, getGlobalThis } from '@intlify/shared';
import { resolveValue } from '@intlify/message-resolver';
export * from '@intlify/message-resolver';
import { createMessageContext } from '@intlify/runtime';
export * from '@intlify/runtime';
import { defaultOnError, baseCompile, createCompileError } from '@intlify/message-compiler';
export { createCompileError } from '@intlify/message-compiler';
import { IntlifyDevToolsHooks } from '@intlify/devtools-if';

let devtools = null;
function setDevToolsHook(hook) {
    devtools = hook;
}
function getDevToolsHook() {
    return devtools;
}
function initI18nDevTools(i18n, version, meta) {
    // TODO: queue if devtools is undefined
    devtools &&
        devtools.emit(IntlifyDevToolsHooks.I18nInit, {
            timestamp: Date.now(),
            i18n,
            version,
            meta
        });
}
const translateDevTools = /* #__PURE__*/ createDevToolsHook(IntlifyDevToolsHooks.FunctionTranslate);
function createDevToolsHook(hook) {
    return (payloads) => devtools && devtools.emit(hook, payloads);
}

/** @internal */
const warnMessages = {
    [0 /* NOT_FOUND_KEY */]: `Not found '{key}' key in '{locale}' locale messages.`,
    [1 /* FALLBACK_TO_TRANSLATE */]: `Fall back to translate '{key}' key with '{target}' locale.`,
    [2 /* CANNOT_FORMAT_NUMBER */]: `Cannot format a number value due to not supported Intl.NumberFormat.`,
    [3 /* FALLBACK_TO_NUMBER_FORMAT */]: `Fall back to number format '{key}' key with '{target}' locale.`,
    [4 /* CANNOT_FORMAT_DATE */]: `Cannot format a date value due to not supported Intl.DateTimeFormat.`,
    [5 /* FALLBACK_TO_DATE_FORMAT */]: `Fall back to datetime format '{key}' key with '{target}' locale.`
};
function getWarnMessage(code, ...args) {
    return format(warnMessages[code], ...args);
}

/**
 * Intlify core-base version
 * @internal
 */
const VERSION = '9.1.7';
const NOT_REOSLVED = -1;
const MISSING_RESOLVE_VALUE = '';
function getDefaultLinkedModifiers() {
    return {
        upper: (val) => (isString(val) ? val.toUpperCase() : val),
        lower: (val) => (isString(val) ? val.toLowerCase() : val),
        // prettier-ignore
        capitalize: (val) => (isString(val)
            ? `${val.charAt(0).toLocaleUpperCase()}${val.substr(1)}`
            : val)
    };
}
let _compiler;
function registerMessageCompiler(compiler) {
    _compiler = compiler;
}
// Additional Meta for Intlify DevTools
let _additionalMeta = null;
const setAdditionalMeta = /* #__PURE__*/ (meta) => {
    _additionalMeta = meta;
};
const getAdditionalMeta = /* #__PURE__*/ () => _additionalMeta;
// ID for CoreContext
let _cid = 0;
function createCoreContext(options = {}) {
    // setup options
    const version = isString(options.version) ? options.version : VERSION;
    const locale = isString(options.locale) ? options.locale : 'en-US';
    const fallbackLocale = isArray(options.fallbackLocale) ||
        isPlainObject(options.fallbackLocale) ||
        isString(options.fallbackLocale) ||
        options.fallbackLocale === false
        ? options.fallbackLocale
        : locale;
    const messages = isPlainObject(options.messages)
        ? options.messages
        : { [locale]: {} };
    const datetimeFormats = isPlainObject(options.datetimeFormats)
        ? options.datetimeFormats
        : { [locale]: {} };
    const numberFormats = isPlainObject(options.numberFormats)
        ? options.numberFormats
        : { [locale]: {} };
    const modifiers = assign({}, options.modifiers || {}, getDefaultLinkedModifiers());
    const pluralRules = options.pluralRules || {};
    const missing = isFunction(options.missing) ? options.missing : null;
    const missingWarn = isBoolean(options.missingWarn) || isRegExp(options.missingWarn)
        ? options.missingWarn
        : true;
    const fallbackWarn = isBoolean(options.fallbackWarn) || isRegExp(options.fallbackWarn)
        ? options.fallbackWarn
        : true;
    const fallbackFormat = !!options.fallbackFormat;
    const unresolving = !!options.unresolving;
    const postTranslation = isFunction(options.postTranslation)
        ? options.postTranslation
        : null;
    const processor = isPlainObject(options.processor) ? options.processor : null;
    const warnHtmlMessage = isBoolean(options.warnHtmlMessage)
        ? options.warnHtmlMessage
        : true;
    const escapeParameter = !!options.escapeParameter;
    const messageCompiler = isFunction(options.messageCompiler)
        ? options.messageCompiler
        : _compiler;
    const onWarn = isFunction(options.onWarn) ? options.onWarn : warn;
    // setup internal options
    const internalOptions = options;
    const __datetimeFormatters = isObject(internalOptions.__datetimeFormatters)
        ? internalOptions.__datetimeFormatters
        : new Map();
    const __numberFormatters = isObject(internalOptions.__numberFormatters)
        ? internalOptions.__numberFormatters
        : new Map();
    const __meta = isObject(internalOptions.__meta) ? internalOptions.__meta : {};
    _cid++;
    const context = {
        version,
        cid: _cid,
        locale,
        fallbackLocale,
        messages,
        datetimeFormats,
        numberFormats,
        modifiers,
        pluralRules,
        missing,
        missingWarn,
        fallbackWarn,
        fallbackFormat,
        unresolving,
        postTranslation,
        processor,
        warnHtmlMessage,
        escapeParameter,
        messageCompiler,
        onWarn,
        __datetimeFormatters,
        __numberFormatters,
        __meta
    };
    // for vue-devtools timeline event
    if ((process.env.NODE_ENV !== 'production')) {
        context.__v_emitter =
            internalOptions.__v_emitter != null
                ? internalOptions.__v_emitter
                : undefined;
    }
    // NOTE: experimental !!
    if ((process.env.NODE_ENV !== 'production') || __INTLIFY_PROD_DEVTOOLS__) {
        initI18nDevTools(context, version, __meta);
    }
    return context;
}
/** @internal */
function isTranslateFallbackWarn(fallback, key) {
    return fallback instanceof RegExp ? fallback.test(key) : fallback;
}
/** @internal */
function isTranslateMissingWarn(missing, key) {
    return missing instanceof RegExp ? missing.test(key) : missing;
}
/** @internal */
function handleMissing(context, key, locale, missingWarn, type) {
    const { missing, onWarn } = context;
    // for vue-devtools timeline event
    if ((process.env.NODE_ENV !== 'production')) {
        const emitter = context.__v_emitter;
        if (emitter) {
            emitter.emit("missing" /* MISSING */, {
                locale,
                key,
                type,
                groupId: `${type}:${key}`
            });
        }
    }
    if (missing !== null) {
        const ret = missing(context, locale, key, type);
        return isString(ret) ? ret : key;
    }
    else {
        if ((process.env.NODE_ENV !== 'production') && isTranslateMissingWarn(missingWarn, key)) {
            onWarn(getWarnMessage(0 /* NOT_FOUND_KEY */, { key, locale }));
        }
        return key;
    }
}
/** @internal */
function getLocaleChain(ctx, fallback, start) {
    const context = ctx;
    if (!context.__localeChainCache) {
        context.__localeChainCache = new Map();
    }
    let chain = context.__localeChainCache.get(start);
    if (!chain) {
        chain = [];
        // first block defined by start
        let block = [start];
        // while any intervening block found
        while (isArray(block)) {
            block = appendBlockToChain(chain, block, fallback);
        }
        // prettier-ignore
        // last block defined by default
        const defaults = isArray(fallback)
            ? fallback
            : isPlainObject(fallback)
                ? fallback['default']
                    ? fallback['default']
                    : null
                : fallback;
        // convert defaults to array
        block = isString(defaults) ? [defaults] : defaults;
        if (isArray(block)) {
            appendBlockToChain(chain, block, false);
        }
        context.__localeChainCache.set(start, chain);
    }
    return chain;
}
function appendBlockToChain(chain, block, blocks) {
    let follow = true;
    for (let i = 0; i < block.length && isBoolean(follow); i++) {
        const locale = block[i];
        if (isString(locale)) {
            follow = appendLocaleToChain(chain, block[i], blocks);
        }
    }
    return follow;
}
function appendLocaleToChain(chain, locale, blocks) {
    let follow;
    const tokens = locale.split('-');
    do {
        const target = tokens.join('-');
        follow = appendItemToChain(chain, target, blocks);
        tokens.splice(-1, 1);
    } while (tokens.length && follow === true);
    return follow;
}
function appendItemToChain(chain, target, blocks) {
    let follow = false;
    if (!chain.includes(target)) {
        follow = true;
        if (target) {
            follow = target[target.length - 1] !== '!';
            const locale = target.replace(/!/g, '');
            chain.push(locale);
            if ((isArray(blocks) || isPlainObject(blocks)) &&
                blocks[locale] // eslint-disable-line @typescript-eslint/no-explicit-any
            ) {
                // eslint-disable-next-line @typescript-eslint/no-explicit-any
                follow = blocks[locale];
            }
        }
    }
    return follow;
}
/** @internal */
function updateFallbackLocale(ctx, locale, fallback) {
    const context = ctx;
    context.__localeChainCache = new Map();
    getLocaleChain(ctx, fallback, locale);
}

const RE_HTML_TAG = /<\/?[\w\s="/.':;#-\/]+>/;
const WARN_MESSAGE = `Detected HTML in '{source}' message. Recommend not using HTML messages to avoid XSS.`;
function checkHtmlMessage(source, options) {
    const warnHtmlMessage = isBoolean(options.warnHtmlMessage)
        ? options.warnHtmlMessage
        : true;
    if (warnHtmlMessage && RE_HTML_TAG.test(source)) {
        warn(format(WARN_MESSAGE, { source }));
    }
}
const defaultOnCacheKey = (source) => source;
let compileCache = Object.create(null);
function clearCompileCache() {
    compileCache = Object.create(null);
}
function compileToFunction(source, options = {}) {
    {
        // check HTML message
        (process.env.NODE_ENV !== 'production') && checkHtmlMessage(source, options);
        // check caches
        const onCacheKey = options.onCacheKey || defaultOnCacheKey;
        const key = onCacheKey(source);
        const cached = compileCache[key];
        if (cached) {
            return cached;
        }
        // compile error detecting
        let occurred = false;
        const onError = options.onError || defaultOnError;
        options.onError = (err) => {
            occurred = true;
            onError(err);
        };
        // compile
        const { code } = baseCompile(source, options);
        // evaluate function
        const msg = new Function(`return ${code}`)();
        // if occurred compile error, don't cache
        return !occurred ? (compileCache[key] = msg) : msg;
    }
}

function createCoreError(code) {
    return createCompileError(code, null, (process.env.NODE_ENV !== 'production') ? { messages: errorMessages } : undefined);
}
/** @internal */
const errorMessages = {
    [14 /* INVALID_ARGUMENT */]: 'Invalid arguments',
    [15 /* INVALID_DATE_ARGUMENT */]: 'The date provided is an invalid Date object.' +
        'Make sure your Date represents a valid date.',
    [16 /* INVALID_ISO_DATE_ARGUMENT */]: 'The argument provided is not a valid ISO date string'
};

const NOOP_MESSAGE_FUNCTION = () => '';
const isMessageFunction = (val) => isFunction(val);
// implementation of `translate` function
function translate(context, ...args) {
    const { fallbackFormat, postTranslation, unresolving, fallbackLocale, messages } = context;
    const [key, options] = parseTranslateArgs(...args);
    const missingWarn = isBoolean(options.missingWarn)
        ? options.missingWarn
        : context.missingWarn;
    const fallbackWarn = isBoolean(options.fallbackWarn)
        ? options.fallbackWarn
        : context.fallbackWarn;
    const escapeParameter = isBoolean(options.escapeParameter)
        ? options.escapeParameter
        : context.escapeParameter;
    const resolvedMessage = !!options.resolvedMessage;
    // prettier-ignore
    const defaultMsgOrKey = isString(options.default) || isBoolean(options.default) // default by function option
        ? !isBoolean(options.default)
            ? options.default
            : key
        : fallbackFormat // default by `fallbackFormat` option
            ? key
            : '';
    const enableDefaultMsg = fallbackFormat || defaultMsgOrKey !== '';
    const locale = isString(options.locale) ? options.locale : context.locale;
    // escape params
    escapeParameter && escapeParams(options);
    // resolve message format
    // eslint-disable-next-line prefer-const
    let [format, targetLocale, message] = !resolvedMessage
        ? resolveMessageFormat(context, key, locale, fallbackLocale, fallbackWarn, missingWarn)
        : [
            key,
            locale,
            messages[locale] || {}
        ];
    // if you use default message, set it as message format!
    let cacheBaseKey = key;
    if (!resolvedMessage &&
        !(isString(format) || isMessageFunction(format))) {
        if (enableDefaultMsg) {
            format = defaultMsgOrKey;
            cacheBaseKey = format;
        }
    }
    // checking message format and target locale
    if (!resolvedMessage &&
        (!(isString(format) || isMessageFunction(format)) ||
            !isString(targetLocale))) {
        return unresolving ? NOT_REOSLVED : key;
    }
    if ((process.env.NODE_ENV !== 'production') && isString(format) && context.messageCompiler == null) {
        warn(`The message format compilation is not supported in this build. ` +
            `Because message compiler isn't included. ` +
            `You need to pre-compilation all message format. ` +
            `So translate function return '${key}'.`);
        return key;
    }
    // setup compile error detecting
    let occurred = false;
    const errorDetector = () => {
        occurred = true;
    };
    // compile message format
    const msg = !isMessageFunction(format)
        ? compileMessageFormat(context, key, targetLocale, format, cacheBaseKey, errorDetector)
        : format;
    // if occurred compile error, return the message format
    if (occurred) {
        return format;
    }
    // evaluate message with context
    const ctxOptions = getMessageContextOptions(context, targetLocale, message, options);
    const msgContext = createMessageContext(ctxOptions);
    const messaged = evaluateMessage(context, msg, msgContext);
    // if use post translation option, proceed it with handler
    const ret = postTranslation ? postTranslation(messaged) : messaged;
    // NOTE: experimental !!
    if ((process.env.NODE_ENV !== 'production') || __INTLIFY_PROD_DEVTOOLS__) {
        // prettier-ignore
        const payloads = {
            timestamp: Date.now(),
            key: isString(key)
                ? key
                : isMessageFunction(format)
                    ? format.key
                    : '',
            locale: targetLocale || (isMessageFunction(format)
                ? format.locale
                : ''),
            format: isString(format)
                ? format
                : isMessageFunction(format)
                    ? format.source
                    : '',
            message: ret
        };
        payloads.meta = assign({}, context.__meta, getAdditionalMeta() || {});
        translateDevTools(payloads);
    }
    return ret;
}
function escapeParams(options) {
    if (isArray(options.list)) {
        options.list = options.list.map(item => isString(item) ? escapeHtml(item) : item);
    }
    else if (isObject(options.named)) {
        Object.keys(options.named).forEach(key => {
            if (isString(options.named[key])) {
                options.named[key] = escapeHtml(options.named[key]);
            }
        });
    }
}
function resolveMessageFormat(context, key, locale, fallbackLocale, fallbackWarn, missingWarn) {
    const { messages, onWarn } = context;
    const locales = getLocaleChain(context, fallbackLocale, locale);
    let message = {};
    let targetLocale;
    let format = null;
    let from = locale;
    let to = null;
    const type = 'translate';
    for (let i = 0; i < locales.length; i++) {
        targetLocale = to = locales[i];
        if ((process.env.NODE_ENV !== 'production') &&
            locale !== targetLocale &&
            isTranslateFallbackWarn(fallbackWarn, key)) {
            onWarn(getWarnMessage(1 /* FALLBACK_TO_TRANSLATE */, {
                key,
                target: targetLocale
            }));
        }
        // for vue-devtools timeline event
        if ((process.env.NODE_ENV !== 'production') && locale !== targetLocale) {
            const emitter = context.__v_emitter;
            if (emitter) {
                emitter.emit("fallback" /* FALBACK */, {
                    type,
                    key,
                    from,
                    to,
                    groupId: `${type}:${key}`
                });
            }
        }
        message =
            messages[targetLocale] || {};
        // for vue-devtools timeline event
        let start = null;
        let startTag;
        let endTag;
        if ((process.env.NODE_ENV !== 'production') && inBrowser) {
            start = window.performance.now();
            startTag = 'intlify-message-resolve-start';
            endTag = 'intlify-message-resolve-end';
            mark && mark(startTag);
        }
        if ((format = resolveValue(message, key)) === null) {
            // if null, resolve with object key path
            format = message[key]; // eslint-disable-line @typescript-eslint/no-explicit-any
        }
        // for vue-devtools timeline event
        if ((process.env.NODE_ENV !== 'production') && inBrowser) {
            const end = window.performance.now();
            const emitter = context.__v_emitter;
            if (emitter && start && format) {
                emitter.emit("message-resolve" /* MESSAGE_RESOLVE */, {
                    type: "message-resolve" /* MESSAGE_RESOLVE */,
                    key,
                    message: format,
                    time: end - start,
                    groupId: `${type}:${key}`
                });
            }
            if (startTag && endTag && mark && measure) {
                mark(endTag);
                measure('intlify message resolve', startTag, endTag);
            }
        }
        if (isString(format) || isFunction(format))
            break;
        const missingRet = handleMissing(context, key, targetLocale, missingWarn, type);
        if (missingRet !== key) {
            format = missingRet;
        }
        from = to;
    }
    return [format, targetLocale, message];
}
function compileMessageFormat(context, key, targetLocale, format, cacheBaseKey, errorDetector) {
    const { messageCompiler, warnHtmlMessage } = context;
    if (isMessageFunction(format)) {
        const msg = format;
        msg.locale = msg.locale || targetLocale;
        msg.key = msg.key || key;
        return msg;
    }
    // for vue-devtools timeline event
    let start = null;
    let startTag;
    let endTag;
    if ((process.env.NODE_ENV !== 'production') && inBrowser) {
        start = window.performance.now();
        startTag = 'intlify-message-compilation-start';
        endTag = 'intlify-message-compilation-end';
        mark && mark(startTag);
    }
    const msg = messageCompiler(format, getCompileOptions(context, targetLocale, cacheBaseKey, format, warnHtmlMessage, errorDetector));
    // for vue-devtools timeline event
    if ((process.env.NODE_ENV !== 'production') && inBrowser) {
        const end = window.performance.now();
        const emitter = context.__v_emitter;
        if (emitter && start) {
            emitter.emit("message-compilation" /* MESSAGE_COMPILATION */, {
                type: "message-compilation" /* MESSAGE_COMPILATION */,
                message: format,
                time: end - start,
                groupId: `${'translate'}:${key}`
            });
        }
        if (startTag && endTag && mark && measure) {
            mark(endTag);
            measure('intlify message compilation', startTag, endTag);
        }
    }
    msg.locale = targetLocale;
    msg.key = key;
    msg.source = format;
    return msg;
}
function evaluateMessage(context, msg, msgCtx) {
    // for vue-devtools timeline event
    let start = null;
    let startTag;
    let endTag;
    if ((process.env.NODE_ENV !== 'production') && inBrowser) {
        start = window.performance.now();
        startTag = 'intlify-message-evaluation-start';
        endTag = 'intlify-message-evaluation-end';
        mark && mark(startTag);
    }
    const messaged = msg(msgCtx);
    // for vue-devtools timeline event
    if ((process.env.NODE_ENV !== 'production') && inBrowser) {
        const end = window.performance.now();
        const emitter = context.__v_emitter;
        if (emitter && start) {
            emitter.emit("message-evaluation" /* MESSAGE_EVALUATION */, {
                type: "message-evaluation" /* MESSAGE_EVALUATION */,
                value: messaged,
                time: end - start,
                groupId: `${'translate'}:${msg.key}`
            });
        }
        if (startTag && endTag && mark && measure) {
            mark(endTag);
            measure('intlify message evaluation', startTag, endTag);
        }
    }
    return messaged;
}
/** @internal */
function parseTranslateArgs(...args) {
    const [arg1, arg2, arg3] = args;
    const options = {};
    if (!isString(arg1) && !isNumber(arg1) && !isMessageFunction(arg1)) {
        throw createCoreError(14 /* INVALID_ARGUMENT */);
    }
    // prettier-ignore
    const key = isNumber(arg1)
        ? String(arg1)
        : isMessageFunction(arg1)
            ? arg1
            : arg1;
    if (isNumber(arg2)) {
        options.plural = arg2;
    }
    else if (isString(arg2)) {
        options.default = arg2;
    }
    else if (isPlainObject(arg2) && !isEmptyObject(arg2)) {
        options.named = arg2;
    }
    else if (isArray(arg2)) {
        options.list = arg2;
    }
    if (isNumber(arg3)) {
        options.plural = arg3;
    }
    else if (isString(arg3)) {
        options.default = arg3;
    }
    else if (isPlainObject(arg3)) {
        assign(options, arg3);
    }
    return [key, options];
}
function getCompileOptions(context, locale, key, source, warnHtmlMessage, errorDetector) {
    return {
        warnHtmlMessage,
        onError: (err) => {
            errorDetector && errorDetector(err);
            if ((process.env.NODE_ENV !== 'production')) {
                const message = `Message compilation error: ${err.message}`;
                const codeFrame = err.location &&
                    generateCodeFrame(source, err.location.start.offset, err.location.end.offset);
                const emitter = context
                    .__v_emitter;
                if (emitter) {
                    emitter.emit("compile-error" /* COMPILE_ERROR */, {
                        message: source,
                        error: err.message,
                        start: err.location && err.location.start.offset,
                        end: err.location && err.location.end.offset,
                        groupId: `${'translate'}:${key}`
                    });
                }
                console.error(codeFrame ? `${message}\n${codeFrame}` : message);
            }
            else {
                throw err;
            }
        },
        onCacheKey: (source) => generateFormatCacheKey(locale, key, source)
    };
}
function getMessageContextOptions(context, locale, message, options) {
    const { modifiers, pluralRules } = context;
    const resolveMessage = (key) => {
        const val = resolveValue(message, key);
        if (isString(val)) {
            let occurred = false;
            const errorDetector = () => {
                occurred = true;
            };
            const msg = compileMessageFormat(context, key, locale, val, key, errorDetector);
            return !occurred
                ? msg
                : NOOP_MESSAGE_FUNCTION;
        }
        else if (isMessageFunction(val)) {
            return val;
        }
        else {
            // TODO: should be implemented warning message
            return NOOP_MESSAGE_FUNCTION;
        }
    };
    const ctxOptions = {
        locale,
        modifiers,
        pluralRules,
        messages: resolveMessage
    };
    if (context.processor) {
        ctxOptions.processor = context.processor;
    }
    if (options.list) {
        ctxOptions.list = options.list;
    }
    if (options.named) {
        ctxOptions.named = options.named;
    }
    if (isNumber(options.plural)) {
        ctxOptions.pluralIndex = options.plural;
    }
    return ctxOptions;
}

const intlDefined = typeof Intl !== 'undefined';
const Availabilities = {
    dateTimeFormat: intlDefined && typeof Intl.DateTimeFormat !== 'undefined',
    numberFormat: intlDefined && typeof Intl.NumberFormat !== 'undefined'
};

// implementation of `datetime` function
function datetime(context, ...args) {
    const { datetimeFormats, unresolving, fallbackLocale, onWarn } = context;
    const { __datetimeFormatters } = context;
    if ((process.env.NODE_ENV !== 'production') && !Availabilities.dateTimeFormat) {
        onWarn(getWarnMessage(4 /* CANNOT_FORMAT_DATE */));
        return MISSING_RESOLVE_VALUE;
    }
    const [key, value, options, overrides] = parseDateTimeArgs(...args);
    const missingWarn = isBoolean(options.missingWarn)
        ? options.missingWarn
        : context.missingWarn;
    const fallbackWarn = isBoolean(options.fallbackWarn)
        ? options.fallbackWarn
        : context.fallbackWarn;
    const part = !!options.part;
    const locale = isString(options.locale) ? options.locale : context.locale;
    const locales = getLocaleChain(context, fallbackLocale, locale);
    if (!isString(key) || key === '') {
        return new Intl.DateTimeFormat(locale).format(value);
    }
    // resolve format
    let datetimeFormat = {};
    let targetLocale;
    let format = null;
    let from = locale;
    let to = null;
    const type = 'datetime format';
    for (let i = 0; i < locales.length; i++) {
        targetLocale = to = locales[i];
        if ((process.env.NODE_ENV !== 'production') &&
            locale !== targetLocale &&
            isTranslateFallbackWarn(fallbackWarn, key)) {
            onWarn(getWarnMessage(5 /* FALLBACK_TO_DATE_FORMAT */, {
                key,
                target: targetLocale
            }));
        }
        // for vue-devtools timeline event
        if ((process.env.NODE_ENV !== 'production') && locale !== targetLocale) {
            const emitter = context.__v_emitter;
            if (emitter) {
                emitter.emit("fallback" /* FALBACK */, {
                    type,
                    key,
                    from,
                    to,
                    groupId: `${type}:${key}`
                });
            }
        }
        datetimeFormat =
            datetimeFormats[targetLocale] || {};
        format = datetimeFormat[key];
        if (isPlainObject(format))
            break;
        handleMissing(context, key, targetLocale, missingWarn, type);
        from = to;
    }
    // checking format and target locale
    if (!isPlainObject(format) || !isString(targetLocale)) {
        return unresolving ? NOT_REOSLVED : key;
    }
    let id = `${targetLocale}__${key}`;
    if (!isEmptyObject(overrides)) {
        id = `${id}__${JSON.stringify(overrides)}`;
    }
    let formatter = __datetimeFormatters.get(id);
    if (!formatter) {
        formatter = new Intl.DateTimeFormat(targetLocale, assign({}, format, overrides));
        __datetimeFormatters.set(id, formatter);
    }
    return !part ? formatter.format(value) : formatter.formatToParts(value);
}
/** @internal */
function parseDateTimeArgs(...args) {
    const [arg1, arg2, arg3, arg4] = args;
    let options = {};
    let overrides = {};
    let value;
    if (isString(arg1)) {
        // Only allow ISO strings - other date formats are often supported,
        // but may cause different results in different browsers.
        if (!/\d{4}-\d{2}-\d{2}(T.*)?/.test(arg1)) {
            throw createCoreError(16 /* INVALID_ISO_DATE_ARGUMENT */);
        }
        value = new Date(arg1);
        try {
            // This will fail if the date is not valid
            value.toISOString();
        }
        catch (e) {
            throw createCoreError(16 /* INVALID_ISO_DATE_ARGUMENT */);
        }
    }
    else if (isDate(arg1)) {
        if (isNaN(arg1.getTime())) {
            throw createCoreError(15 /* INVALID_DATE_ARGUMENT */);
        }
        value = arg1;
    }
    else if (isNumber(arg1)) {
        value = arg1;
    }
    else {
        throw createCoreError(14 /* INVALID_ARGUMENT */);
    }
    if (isString(arg2)) {
        options.key = arg2;
    }
    else if (isPlainObject(arg2)) {
        options = arg2;
    }
    if (isString(arg3)) {
        options.locale = arg3;
    }
    else if (isPlainObject(arg3)) {
        overrides = arg3;
    }
    if (isPlainObject(arg4)) {
        overrides = arg4;
    }
    return [options.key || '', value, options, overrides];
}
/** @internal */
function clearDateTimeFormat(ctx, locale, format) {
    const context = ctx;
    for (const key in format) {
        const id = `${locale}__${key}`;
        if (!context.__datetimeFormatters.has(id)) {
            continue;
        }
        context.__datetimeFormatters.delete(id);
    }
}

// implementation of `number` function
function number(context, ...args) {
    const { numberFormats, unresolving, fallbackLocale, onWarn } = context;
    const { __numberFormatters } = context;
    if ((process.env.NODE_ENV !== 'production') && !Availabilities.numberFormat) {
        onWarn(getWarnMessage(2 /* CANNOT_FORMAT_NUMBER */));
        return MISSING_RESOLVE_VALUE;
    }
    const [key, value, options, overrides] = parseNumberArgs(...args);
    const missingWarn = isBoolean(options.missingWarn)
        ? options.missingWarn
        : context.missingWarn;
    const fallbackWarn = isBoolean(options.fallbackWarn)
        ? options.fallbackWarn
        : context.fallbackWarn;
    const part = !!options.part;
    const locale = isString(options.locale) ? options.locale : context.locale;
    const locales = getLocaleChain(context, fallbackLocale, locale);
    if (!isString(key) || key === '') {
        return new Intl.NumberFormat(locale).format(value);
    }
    // resolve format
    let numberFormat = {};
    let targetLocale;
    let format = null;
    let from = locale;
    let to = null;
    const type = 'number format';
    for (let i = 0; i < locales.length; i++) {
        targetLocale = to = locales[i];
        if ((process.env.NODE_ENV !== 'production') &&
            locale !== targetLocale &&
            isTranslateFallbackWarn(fallbackWarn, key)) {
            onWarn(getWarnMessage(3 /* FALLBACK_TO_NUMBER_FORMAT */, {
                key,
                target: targetLocale
            }));
        }
        // for vue-devtools timeline event
        if ((process.env.NODE_ENV !== 'production') && locale !== targetLocale) {
            const emitter = context.__v_emitter;
            if (emitter) {
                emitter.emit("fallback" /* FALBACK */, {
                    type,
                    key,
                    from,
                    to,
                    groupId: `${type}:${key}`
                });
            }
        }
        numberFormat =
            numberFormats[targetLocale] || {};
        format = numberFormat[key];
        if (isPlainObject(format))
            break;
        handleMissing(context, key, targetLocale, missingWarn, type);
        from = to;
    }
    // checking format and target locale
    if (!isPlainObject(format) || !isString(targetLocale)) {
        return unresolving ? NOT_REOSLVED : key;
    }
    let id = `${targetLocale}__${key}`;
    if (!isEmptyObject(overrides)) {
        id = `${id}__${JSON.stringify(overrides)}`;
    }
    let formatter = __numberFormatters.get(id);
    if (!formatter) {
        formatter = new Intl.NumberFormat(targetLocale, assign({}, format, overrides));
        __numberFormatters.set(id, formatter);
    }
    return !part ? formatter.format(value) : formatter.formatToParts(value);
}
/** @internal */
function parseNumberArgs(...args) {
    const [arg1, arg2, arg3, arg4] = args;
    let options = {};
    let overrides = {};
    if (!isNumber(arg1)) {
        throw createCoreError(14 /* INVALID_ARGUMENT */);
    }
    const value = arg1;
    if (isString(arg2)) {
        options.key = arg2;
    }
    else if (isPlainObject(arg2)) {
        options = arg2;
    }
    if (isString(arg3)) {
        options.locale = arg3;
    }
    else if (isPlainObject(arg3)) {
        overrides = arg3;
    }
    if (isPlainObject(arg4)) {
        overrides = arg4;
    }
    return [options.key || '', value, options, overrides];
}
/** @internal */
function clearNumberFormat(ctx, locale, format) {
    const context = ctx;
    for (const key in format) {
        const id = `${locale}__${key}`;
        if (!context.__numberFormatters.has(id)) {
            continue;
        }
        context.__numberFormatters.delete(id);
    }
}

{
    if (typeof __INTLIFY_PROD_DEVTOOLS__ !== 'boolean') {
        getGlobalThis().__INTLIFY_PROD_DEVTOOLS__ = false;
    }
}

export { MISSING_RESOLVE_VALUE, NOT_REOSLVED, VERSION, clearCompileCache, clearDateTimeFormat, clearNumberFormat, compileToFunction, createCoreContext, createCoreError, datetime, getAdditionalMeta, getDevToolsHook, getLocaleChain, getWarnMessage, handleMissing, initI18nDevTools, isMessageFunction, isTranslateFallbackWarn, isTranslateMissingWarn, number, parseDateTimeArgs, parseNumberArgs, parseTranslateArgs, registerMessageCompiler, setAdditionalMeta, setDevToolsHook, translate, translateDevTools, updateFallbackLocale };