import { Culture } from '@microsoft/recognizers-text-suite';

export interface PromptCultureModel {
    /**
     * Culture Model's Locale.
     *
     * @example
     * "en-US"
     */
    locale: string;
    /**
     * Culture Model's InlineSeparator.
     *
     * @example
     * ", "
     */
    separator: string;
    /**
     * Culture Model's InlineOr.
     *
     * @example
     * " or "
     */
    inlineOr: string;
    /**
     * Culture Model's InlineOrMore.
     *
     * @example
     * ", or "
     */
    inlineOrMore: string;
    /**
     * Equivalent of "Yes" in Culture Model's Language.
     *
     * @example
     * "Yes"
     */
    yesInLanguage: string;
    /**
     * Equivalent of "No" in Culture Model's Language.
     *
     * @example
     * "No"
     */
    noInLanguage: string;
}

/**
 * Class container for currently-supported Culture Models in Confirm and Choice Prompt.
 */
export class PromptCultureModels {
    static Chinese: PromptCultureModel = {
        locale: Culture.Chinese,
        separator: ', ',
        inlineOr: ' 要么 ',
        inlineOrMore: '， 要么 ',
        yesInLanguage: '是的',
        noInLanguage: '不',
    };

    static Dutch: PromptCultureModel = {
        locale: Culture.Dutch,
        separator: ', ',
        inlineOr: ' of ',
        inlineOrMore: ', of ',
        yesInLanguage: 'Ja',
        noInLanguage: 'Nee',
    };

    static English: PromptCultureModel = {
        locale: Culture.English,
        separator: ', ',
        inlineOr: ' or ',
        inlineOrMore: ', or ',
        yesInLanguage: 'Yes',
        noInLanguage: 'No',
    };

    static French: PromptCultureModel = {
        locale: Culture.French,
        separator: ', ',
        inlineOr: ' ou ',
        inlineOrMore: ', ou ',
        yesInLanguage: 'Oui',
        noInLanguage: 'Non',
    };

    static German: PromptCultureModel = {
        locale: Culture.German,
        separator: ', ',
        inlineOr: ' oder ',
        inlineOrMore: ', oder ',
        yesInLanguage: 'Ja',
        noInLanguage: 'Nein',
    };

    static Italian: PromptCultureModel = {
        locale: Culture.Italian,
        separator: ', ',
        inlineOr: ' o ',
        inlineOrMore: ' o ',
        yesInLanguage: 'Si',
        noInLanguage: 'No',
    };

    static Japanese: PromptCultureModel = {
        locale: Culture.Japanese,
        separator: '、 ',
        inlineOr: ' または ',
        inlineOrMore: '、 または ',
        yesInLanguage: 'はい',
        noInLanguage: 'いいえ',
    };

    static Portuguese: PromptCultureModel = {
        locale: Culture.Portuguese,
        separator: ', ',
        inlineOr: ' ou ',
        inlineOrMore: ', ou ',
        yesInLanguage: 'Sim',
        noInLanguage: 'Não',
    };

    static Spanish: PromptCultureModel = {
        locale: Culture.Spanish,
        separator: ', ',
        inlineOr: ' o ',
        inlineOrMore: ', o ',
        yesInLanguage: 'Sí',
        noInLanguage: 'No',
    };

    /**
     * @private
     */
    private static getSupportedCultureCodes(): string[] {
        return this.getSupportedCultures().map((c): string => c.locale);
    }

    /**
     * Use Recognizers-Text to normalize various potential Locale strings to a standard.
     *
     * @remarks This is mostly a copy/paste from https://github.com/microsoft/Recognizers-Text/blob/master/JavaScript/packages/recognizers-text/src/culture.ts#L39
     *          This doesn't directly use Recognizers-Text's MapToNearestLanguage because if they add language support before we do, it will break our prompts.
     * @param cultureCode Represents locale. Examples: "en-US, en-us, EN".
     * @returns Normalized locale.
     */
    static mapToNearestLanguage(cultureCode: string): string {
        if (cultureCode) {
            cultureCode = cultureCode.toLowerCase();
            const supportedCultureCodes = this.getSupportedCultureCodes();

            if (supportedCultureCodes.indexOf(cultureCode) < 0) {
                const culturePrefix = cultureCode.split('-')[0].trim();

                supportedCultureCodes.forEach(function (supportedCultureCode): void {
                    if (supportedCultureCode.startsWith(culturePrefix)) {
                        cultureCode = supportedCultureCode;
                    }
                });
            }
        }

        return cultureCode;
    }

    static getSupportedCultures = (): PromptCultureModel[] => [
        PromptCultureModels.Chinese,
        PromptCultureModels.Dutch,
        PromptCultureModels.English,
        PromptCultureModels.French,
        PromptCultureModels.German,
        PromptCultureModels.Italian,
        PromptCultureModels.Japanese,
        PromptCultureModels.Portuguese,
        PromptCultureModels.Spanish,
    ];
}