import I18nKey from "@i18n/i18nKey";
import { i18n } from "@i18n/translation";

/**
 * 移除文件扩展名（.md, .mdx, .markdown）
 * 用于将 Astro v5 Content Layer API 的 id 转换为 URL 友好的 slug
 */
export function removeFileExtension(id: string): string {
	return id.replace(/\.(md|mdx|markdown)$/i, "");
}

export function pathsEqual(path1: string, path2: string) {
	const normalizedPath1 = path1.replace(/^\/|\/$/g, "").toLowerCase();
	const normalizedPath2 = path2.replace(/^\/|\/$/g, "").toLowerCase();
	return normalizedPath1 === normalizedPath2;
}

function joinUrl(...parts: string[]): string {
	const joined = parts.join("/");
	return joined.replace(/\/+/g, "/");
}

export function getPostUrlBySlug(slug: string): string {
	// 移除文件扩展名（如 .md, .mdx 等）
	const slugWithoutExt = removeFileExtension(slug);
	return url(`/posts/${slugWithoutExt}/`);
}

export function getTagUrl(tag: string): string {
	if (!tag) return url("/archive/");
	return url(`/archive/?tag=${encodeURIComponent(tag.trim())}`);
}

export function getCategoryUrl(category: string | null): string {
	if (
		!category ||
		category.trim() === "" ||
		category.trim().toLowerCase() === i18n(I18nKey.uncategorized).toLowerCase()
	)
		return url("/archive/?uncategorized=true");
	return url(`/archive/?category=${encodeURIComponent(category.trim())}`);
}

export function getDir(path: string): string {
	// 移除文件扩展名
	const pathWithoutExt = removeFileExtension(path);
	const lastSlashIndex = pathWithoutExt.lastIndexOf("/");
	if (lastSlashIndex < 0) {
		return "/";
	}
	return pathWithoutExt.substring(0, lastSlashIndex + 1);
}

export function getFileDirFromPath(filePath: string): string {
	return filePath.replace(/^src\//, "").replace(/\/[^/]+$/, "");
}

export function getSearchUrl(query: string): string {
	return url(`/search/?q=${encodeURIComponent(query.trim())}`);
}

export function url(path: string) {
	return joinUrl("", import.meta.env.BASE_URL, path);
}