import { unified } from 'unified';
import remarkParse from 'remark-parse';
import remarkFrontmatter from 'remark-frontmatter';
import remarkDirective from 'remark-directive';
import remarkGfm from 'remark-gfm';
import remarkRehype from 'remark-rehype';
import rehypeRaw from 'rehype-raw';
import rehypeSlug from 'rehype-slug';
import rehypeStringify from 'rehype-stringify';
import { saveFrontmatter } from './markdown-frontmatter';
import {
    admonitions,
    normalizeLegacyAdmonitions,
} from './markdown-admonitions';
import { kompendiumCode } from './markdown-code';
import { typeLinks } from './markdown-typelinks';

export interface File {
    data: {
        frontmatter?: Record<string, any>;
        path?: string;
    };

    toString(): string;
}

export async function markdownToHtml(text: string, types = []): Promise<File> {
    const normalized = normalizeLegacyAdmonitions(text);

    const file = await unified()
        .use(remarkParse)
        .use(remarkGfm)
        .use(remarkFrontmatter)
        .use(saveFrontmatter)
        .use(remarkDirective)
        .use(admonitions)
        .use(remarkRehype, { allowDangerousHtml: true })
        .use(rehypeRaw)
        .use(rehypeSlug)
        .use(typeLinks, { types: types })
        .use(kompendiumCode)
        .use(rehypeStringify)
        .process(normalized);

    return {
        data: file.data as File['data'],
        toString: () => file.toString(),
    };
}