const apiPath = 'de.pinuts.cmsbs.restapi.Forms/index';

const getRestProxyUrl = (umopen: string, restProxyUrl: string = '/p') => {

    return `${restProxyUrl}/${apiPath}?umopen=${encodeURI(umopen)}`;
};


/**
 * This method is used to load contact instances from UM.
 * It delivers only enabled forms.
 *
 * @async
 * @param {string} umopen
 * @param {string} restProxyUrl - The REST-Proxy URL. Default is '/p'.
 * @param {string} locale - 2-letter language/locale key. This is a required parameter.
 * @param {string} [name] - The name of the form instances to be loaded. This is an optional parameter.
 * @param {string} [searchTerm] - Search term, case-insensitive substring of
 *      *               <tt>name</tt>, <tt>title</tt> or <tt>description</tt>
 * @returns {Promise<any>} A promise that resolves with the JSON response from the server.
 * @throws {Error} Throws an error if the locale is not provided or if the HTTP request fails.
 */
export const loadContactFormInstances = async (
    umopen: string,
    locale: string,
    restProxyUrl: string,
    name?: string,
    searchTerm?: string,
): Promise<void> => {
    const pluginTypeName = 'de.pinuts.cmsbs.contactform2';

    return loadFormInstances(umopen, restProxyUrl, locale, pluginTypeName, name, searchTerm);
};


/**
 * This method is used to load newsletter instances from UM.
 * It delivers only enabled forms.
 *
 * @async
 * @param {string} umopen
 * @param {string} restProxyUrl - The REST-Proxy URL. Default is '/p'.
 * @param {string} locale - 2-letter language/locale key. This is a required parameter.
 * @param {string} [name] - The name of the form instances to be loaded. This is an optional parameter.
 * @param {string} [searchTerm] - Search term, case-insensitive substring of
 *      *               <tt>name</tt>, <tt>title</tt> or <tt>description</tt>
 * @returns {Promise<any>} A promise that resolves with the JSON response from the server.
 * @throws {Error} Throws an error if the locale is not provided or if the HTTP request fails.
 */
export const loadNewsletterInstances = async (
    umopen: string,
    locale: string,
    restProxyUrl: string,
    name?: string,
    searchTerm?: string,
): Promise<void> => {

    const pluginTypeName = 'de.pinuts.cmsbs.newsletter';

    return loadFormInstances(umopen, restProxyUrl, locale, pluginTypeName, name, searchTerm);
};


/**
 * This method is used to load form instances based on the provided parameters.
 *
 * @async
 * @param {string} umopen
 * @param {string} restProxyUrl - The REST-Proxy URL. Default is '/p'.
 * @param {string} locale - 2-letter language/locale key. This is a required parameter.
 * @param {string} [pluginTypeName] - Plugin's package name
 * @param {string} [name] - The name of the form instances to be loaded. This is an optional parameter.
 * @param {string} [searchTerm] - Search term, case-insensitive substring of
 *      *               <tt>name</tt>, <tt>title</tt> or <tt>description</tt>
 * @returns {Promise<any>} A promise that resolves with the JSON response from the server.
 * @throws {Error} Throws an error if the locale is not provided or if the HTTP request fails.
 */
export const loadFormInstances = async (
    umopen: string,
    restProxyUrl: string,
    locale: string,
    pluginTypeName?: string,
    name?: string,
    searchTerm?: string): Promise<any> => {

    if (!locale) {
        throw new Error('locale is required');
    }

    const paramString = [
        `locale=${encodeURI(locale)}`,
        pluginTypeName ? `type=${encodeURI(pluginTypeName)}` : '',
        name ? `name=${encodeURI(name)}` : '',
        searchTerm ? `searchTerm=${encodeURI(searchTerm)}` : '',
    ].filter(Boolean).join('&');

    const urlWithParams = `${getRestProxyUrl(umopen, restProxyUrl)}&${paramString}`;

    const response = await fetch(urlWithParams);
    if (!response.ok) {
        console.error('UM loadFormInstances failed:', response.status);
        throw new Error(`HTTP error! status: ${response.status}`);
    }

    return response.json();
};