// Copyright © onWidget <https://github.com/onwidget>
// SPDX-License-Identifier: MIT
import slugify from "limax";

import { SITE, APP_BLOG } from "astrowind:config";

import { trim } from "@slint/common-files/src/utils/utils";

export const trimSlash = (s: string) => trim(trim(s, "/"));
const createPath = (...params: string[]) => {
    const paths = params
        .map((el) => trimSlash(el))
        .filter((el) => !!el)
        .join("/");
    return "/" + paths + (SITE.trailingSlash && paths ? "/" : "");
};

const BASE_PATHNAME = SITE.base || "/";

export const cleanSlug = (text = "") =>
    trimSlash(text)
        .split("/")
        .map((slug) => slugify(slug))
        .join("/");

export const BLOG_BASE = cleanSlug(APP_BLOG?.list?.pathname);
export const CATEGORY_BASE = cleanSlug(APP_BLOG?.category?.pathname);
export const TAG_BASE = cleanSlug(APP_BLOG?.tag?.pathname) || "tag";

export const POST_PERMALINK_PATTERN = trimSlash(
    APP_BLOG?.post?.permalink || `${BLOG_BASE}/%slug%`,
);

/** */
export const getCanonical = (path = ""): string | URL => {
    const url = String(new URL(path, SITE.site));
    if (SITE.trailingSlash === false && path && url.endsWith("/")) {
        return url.slice(0, -1);
    } else if (SITE.trailingSlash === true && path && !url.endsWith("/")) {
        return url + "/";
    }
    return url;
};

/** */
export const getPermalink = (slug = "", type = "page"): string => {
    let permalink: string;

    if (
        slug.startsWith("https://") ||
        slug.startsWith("http://") ||
        slug.startsWith("://") ||
        slug.startsWith("#") ||
        slug.startsWith("javascript:")
    ) {
        return slug;
    }

    switch (type) {
        case "home":
            permalink = getHomePermalink();
            break;

        case "blog":
            permalink = getBlogPermalink();
            break;

        case "asset":
            permalink = getAsset(slug);
            break;

        case "category":
            permalink = createPath(CATEGORY_BASE, trimSlash(slug));
            break;

        case "tag":
            permalink = createPath(TAG_BASE, trimSlash(slug));
            break;

        case "post":
            permalink = createPath(trimSlash(slug));
            break;

        case "page":
        default:
            permalink = createPath(slug);
            break;
    }

    return definitivePermalink(permalink);
};

/** */
export const getHomePermalink = (): string => getPermalink("/");

/** */
export const getBlogPermalink = (): string => getPermalink(BLOG_BASE);

/** */
export const getAsset = (path: string): string =>
    "/" +
    [BASE_PATHNAME, path]
        .map((el) => trimSlash(el))
        .filter((el) => !!el)
        .join("/");

/** */
const definitivePermalink = (permalink: string): string =>
    createPath(BASE_PATHNAME, permalink);

/** */
export const applyGetPermalinks = (menu: unknown = {}): unknown => {
    if (Array.isArray(menu)) {
        return menu.map((item) => applyGetPermalinks(item));
    }
    if (typeof menu === "object" && menu !== null) {
        const obj: Record<string, unknown> = {};
        const record = menu as Record<string, unknown>;
        for (const key in record) {
            if (key === "href") {
                const href = record[key];
                if (typeof href === "string") {
                    obj[key] = getPermalink(href);
                } else if (typeof href === "object" && href !== null) {
                    const h = href as { type?: string; url?: string };
                    if (h.type === "home") {
                        obj[key] = getHomePermalink();
                    } else if (h.type === "blog") {
                        obj[key] = getBlogPermalink();
                    } else if (h.type === "asset") {
                        obj[key] = getAsset(h.url ?? "");
                    } else if (h.url) {
                        obj[key] = getPermalink(h.url, h.type ?? "page");
                    }
                }
            } else {
                obj[key] = applyGetPermalinks(record[key]);
            }
        }
        return obj;
    }
    return menu;
};