import {
    GetPublicApiCategoriesResponse,
    GetPublicApiPostsResponse,
    LatestPostsByLocale,
    PublicApiPostTranslation
} from "../types";
import createPaths from "./createPaths";
import formatDate from "./formatDate";
import getUncategorizedCategoryProperties from "./getUncategorizedCategoryProperties";

type PostData = PublicApiPostTranslation & {
    slug: string;
    category: number;
};

const sortPostTranslations = (posts: PostData[]) => {
    return posts.sort((a: PostData, b: PostData) => {
        const aDate = new Date(a.updatedAt);
        const bDate = new Date(b.updatedAt);

        if (aDate > bDate) return -1;
        return 1;
    });
};

const getLatestPostsByLocaleFromPostResponse = (
    postsResponse: GetPublicApiPostsResponse,
    categoriesResponse: GetPublicApiCategoriesResponse,
    locales: string[]
): LatestPostsByLocale => {
    const responsePosts = postsResponse.data.items;
    const responseCategories = categoriesResponse.data.items;

    const latestPostsByLocale: LatestPostsByLocale = {};

    locales.forEach(locale => {
        const postTranslations: PostData[] = [];

        responsePosts.forEach(post => {
            post.translations.forEach(translation => {
                if (translation.locale === locale) {
                    postTranslations.push({ ...translation, slug: post.slug, category: post.category });
                }
            });
        });

        const sortedPosts = sortPostTranslations(postTranslations);

        latestPostsByLocale[locale] = sortedPosts.map(post => {
            const category = responseCategories.find(category => category.id === post.category);

            return {
                translationId: post.id,
                title: post.title,
                description: post.metaDescription,
                updatedAt: formatDate(post.updatedAt, locale),
                link: `${createPaths.getPublicUrl()}/${createPaths.post(
                    locale,
                    !category ? getUncategorizedCategoryProperties(locale).slug : category.slug,
                    post.slug
                )}`
            };
        });
    });

    return latestPostsByLocale;
};

export default getLatestPostsByLocaleFromPostResponse;