/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { Inject, Injectable, LOCALE_ID } from '@angular/core';
import { getLocalePluralCase, Plural } from './locale_data_api';
/**
 * @publicApi
 */
export class NgLocalization {
}
/**
 * Returns the plural category for a given value.
 * - "=value" when the case exists,
 * - the plural category otherwise
 */
export function getPluralCategory(value, cases, ngLocalization, locale) {
    let key = `=${value}`;
    if (cases.indexOf(key) > -1) {
        return key;
    }
    key = ngLocalization.getPluralCategory(value, locale);
    if (cases.indexOf(key) > -1) {
        return key;
    }
    if (cases.indexOf('other') > -1) {
        return 'other';
    }
    throw new Error(`No plural message found for value "${value}"`);
}
/**
 * Returns the plural case based on the locale
 *
 * @publicApi
 */
export class NgLocaleLocalization extends NgLocalization {
    constructor(locale) {
        super();
        this.locale = locale;
    }
    getPluralCategory(value, locale) {
        const plural = getLocalePluralCase(locale || this.locale)(value);
        switch (plural) {
            case Plural.Zero:
                return 'zero';
            case Plural.One:
                return 'one';
            case Plural.Two:
                return 'two';
            case Plural.Few:
                return 'few';
            case Plural.Many:
                return 'many';
            default:
                return 'other';
        }
    }
}
NgLocaleLocalization.decorators = [
    { type: Injectable }
];
NgLocaleLocalization.ctorParameters = () => [
    { type: String, decorators: [{ type: Inject, args: [LOCALE_ID,] }] }
];
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