import type { NuxtApp } from '#app';
import type { ComputedRef } from 'vue';
import type { Directions, LocaleObject, Strategies } from '#internal-i18n-types';
import type { I18n, Locale, Composer, VueI18n, ExportedGlobalComposer } from 'vue-i18n';
import type { RouteLocationAsRelative, RouteLocationNormalizedGeneric, RouteRecordNameGeneric } from 'vue-router';
export type CompatRoute = Omit<RouteLocationNormalizedGeneric, 'name'> & {
    name: RouteRecordNameGeneric | null;
};
export type RouteLocationGenericPath = Omit<RouteLocationAsRelative, 'path' | 'name'> & {
    path?: string;
    name?: RouteLocationAsRelative['name'] | null;
};
export type I18nRouteMeta = Partial<Record<Locale, Record<string, unknown>>>;
/**
 * Called before the app's locale is switched.
 *
 * @remarks
 * Can be used to override the new locale by returning a new locale code.
 *
 * @param oldLocale - The app's locale before the switch.
 * @param newLocale - The app's locale after the switch.
 * @param initialSetup - Set to `true` if it's the initial locale switch that triggers on app load. It's a special case since the locale is not technically set yet so we're switching from no locale to locale.
 * @param context - the Nuxt app instance.
 *
 * @returns The new locale to switch, or `undefined` to keep the new locale.
 */
type BeforeLanguageSwitchHandler = (oldLocale: Locale, newLocale: Locale, initialSetup: boolean, context: NuxtApp) => Promise<Locale | void>;
/**
 * Called after the app's locale is switched.
 *
 * @param oldLocale - The app's locale before the switch
 * @param newLocale - The app's locale after the switch.
 */
type LanguageSwitchedHandler = (oldLocale: Locale, newLocale: Locale) => Promise<void>;
interface SharedProperties {
    /**
     * Routing strategy.
     */
    strategy: Strategies;
    /**
     * Whether differentDomains option is enabled.
     */
    differentDomains: boolean;
    /**
     * Default direction as specified in options.
     */
    defaultDirection: Directions;
    /**
     * Default locale as specified in options.
     */
    defaultLocale: Locale;
    /**
     * Switches locale of the app to specified locale code.
     *
     * @remarks
     * If `useCookie` option is enabled, locale cookie will be updated with new value.
     *
     * If prefixes are enabled (`strategy` other than `no_prefix`), will navigate to new locale's route.
     *
     * @param locale - A {@link Locale}
     */
    setLocale: (locale: Locale) => Promise<void>;
    /**
     * Loads locale messages of the specified locale code.
     *
     * @param locale - A {@link Locale}
     */
    loadLocaleMessages: (locale: Locale) => Promise<void>;
    /**
     * Returns browser locale code filtered against the ones defined in options.
     *
     * @returns The browser locale.
     */
    getBrowserLocale: () => string | undefined;
    /**
     * Returns locale code from stored locale cookie.
     *
     * @returns The locale cookie
     */
    getLocaleCookie: () => string | undefined;
    /**
     * Updates stored locale cookie with specified locale code.
     *
     * @remarks
     * Consider using `setLocale` instead if you want to switch locale.
     *
     * @param locale - A {@link Locale}
     */
    setLocaleCookie: (locale: Locale) => void;
    /**
     * Called before the app's locale is switched.
     *
     * @remarks
     * Can be used to override the new locale by returning a new locale code.
     *
     * @param oldLocale - The app's locale before the switch.
     * @param newLocale - The app's locale after the switch.
     * @param initialSetup - Set to `true` if it's the initial locale switch that triggers on app load. It's a special case since the locale is not technically set yet so we're switching from no locale to locale.
     * @param context - the Nuxt app instance.
     *
     * @returns The new locale to switch, or `undefined` to keep the new locale.
     */
    onBeforeLanguageSwitch: BeforeLanguageSwitchHandler;
    /**
     * Called after the app's locale is switched.
     *
     * @param oldLocale - The app's locale before the switch
     * @param newLocale - The app's locale after the switch.
     */
    onLanguageSwitched: LanguageSwitchedHandler;
    /**
     * Switches to the pending locale that would have been set on navigate, but was prevented by the `skipSettingLocaleOnNavigate` option.
     */
    finalizePendingLocaleChange: () => Promise<void>;
    /**
     * Returns a promise that will be resolved once the pending locale is set.
     */
    waitForPendingLocaleChange: () => Promise<void>;
    __extendComposer: (instance: Composer | VueI18n | ExportedGlobalComposer) => void;
}
export interface ComposerCustomProperties<ConfiguredLocaleType extends Locale[] | LocaleObject[] = Locale[] | LocaleObject[]> extends SharedProperties {
    /**
     * List of locales
     *
     * @remarks
     * Can either be an array of string codes (e.g. `['en', 'fr']`) or an array of {@link LocaleObject} for more complex configurations
     */
    locales: ComputedRef<ConfiguredLocaleType>;
    /**
     * List of locale codes
     */
    localeCodes: ComputedRef<Locale[]>;
    /**
     * Base URL that is used in generating canonical links
     */
    baseUrl: ComputedRef<string>;
    /**
     * Current locale properties.
     */
    localeProperties: ComputedRef<LocaleObject>;
}
export interface NuxtI18nRoutingCustomProperties<ConfiguredLocaleType extends Locale[] | LocaleObject[] = Locale[] | LocaleObject[]> extends SharedProperties {
    /**
     * List of locales
     *
     * @remarks
     * Can either be an array of string codes (e.g. `['en', 'fr']`) or an array of {@link LocaleObject} for more complex configurations
     */
    readonly locales: ConfiguredLocaleType;
    /**
     * List of locale codes
     */
    readonly localeCodes: Locale[];
    /**
     * Base URL that is used in generating canonical links
     */
    baseUrl: string;
    /**
     * Current locale properties.
     */
    localeProperties: LocaleObject;
}
declare module '#app' {
    interface NuxtApp {
        /** @internal */
        _vueI18n: I18n;
    }
}
declare module 'vue-i18n' {
    interface I18n {
        /** @internal */ __pendingLocale?: string;
        /** @internal */ __pendingLocalePromise?: Promise<void>;
        /** @internal */ __firstAccess: boolean;
        /** @internal */ __localeFromRoute: (route: string | CompatRoute) => string;
        /**
         * Sets the value of the locale property on VueI18n or Composer instance
         *
         * This differs from the instance `setLocale` method in that it sets the
         * locale property directly without triggering other side effects
         * @internal
         */
        __setLocale: (locale: string) => void;
        __resolvePendingLocalePromise?: () => void;
        loadLocaleMessages: (locale: Locale) => Promise<void>;
    }
}
export {};