import * as Mustache from 'mustache';
import { filename } from '@joplin/lib/path-utils';
import * as fs from 'fs-extra';
import { TemplateParams } from './types';
import { headerAnchor } from '@joplin/renderer';
const MarkdownIt = require('markdown-it');

export async function loadMustachePartials(partialDir: string) {
	const output: Record<string, string> = {};
	const files = await fs.readdir(partialDir);
	for (const f of files) {
		const name = filename(f);
		const templateContent = await fs.readFile(`${partialDir}/${f}`, 'utf8');
		output[name] = templateContent;
	}
	return output;
}

export function renderMustache(contentHtml: string, templateParams: TemplateParams) {
	return Mustache.render(templateParams.templateHtml, {
		...templateParams,
		contentHtml,
	}, templateParams.partials);
}

export function getMarkdownIt() {
	return new MarkdownIt({
		breaks: true,
		linkify: true,
		html: true,
	});
}

export function markdownToPageHtml(md: string, templateParams: TemplateParams): string {
	const markdownIt = getMarkdownIt();

	markdownIt.core.ruler.push('tableClass', (state: any) => {
		const tokens = state.tokens;
		for (let i = 0; i < tokens.length; i++) {
			const token = tokens[i];

			if (token.type === 'table_open') {
				token.attrs = [
					['class', 'table'],
				];
			}
		}
	});

	markdownIt.use(headerAnchor);

	// markdownIt.core.ruler.push('checkbox', (state: any) => {
	// 	const tokens = state.tokens;
	// 	const Token = state.Token;
	// 	const doneNames = [];

	// 	const headingTextToAnchorName = (text: string, doneNames: string[]) => {
	// 		const allowed = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
	// 		let lastWasDash = true;
	// 		let output = '';
	// 		for (let i = 0; i < text.length; i++) {
	// 			const c = text[i];
	// 			if (allowed.indexOf(c) < 0) {
	// 				if (lastWasDash) continue;
	// 				lastWasDash = true;
	// 				output += '-';
	// 			} else {
	// 				lastWasDash = false;
	// 				output += c;
	// 			}
	// 		}

	// 		output = output.toLowerCase();

	// 		while (output.length && output[output.length - 1] === '-') {
	// 			output = output.substr(0, output.length - 1);
	// 		}

	// 		let temp = output;
	// 		let index = 1;
	// 		while (doneNames.indexOf(temp) >= 0) {
	// 			temp = `${output}-${index}`;
	// 			index++;
	// 		}
	// 		output = temp;

	// 		return output;
	// 	};

	// 	const createAnchorTokens = (anchorName: string) => {
	// 		const output = [];

	// 		{
	// 			const token = new Token('heading_anchor_open', 'a', 1);
	// 			token.attrs = [
	// 				['name', anchorName],
	// 				['href', `#${anchorName}`],
	// 				['class', 'heading-anchor'],
	// 			];
	// 			output.push(token);
	// 		}

	// 		{
	// 			const token = new Token('text', '', 0);
	// 			token.content = '🔗';
	// 			output.push(token);
	// 		}

	// 		{
	// 			const token = new Token('heading_anchor_close', 'a', -1);
	// 			output.push(token);
	// 		}

	// 		return output;
	// 	};

	// 	let insideHeading = false;
	// 	for (let i = 0; i < tokens.length; i++) {
	// 		const token = tokens[i];

	// 		if (token.type === 'heading_open') {
	// 			insideHeading = true;
	// 			continue;
	// 		}

	// 		if (token.type === 'heading_close') {
	// 			insideHeading = false;
	// 			continue;
	// 		}

	// 		if (insideHeading && token.type === 'inline') {
	// 			const anchorName = headingTextToAnchorName(token.content, doneNames);
	// 			doneNames.push(anchorName);
	// 			const anchorTokens = createAnchorTokens(anchorName);
	// 			// token.children = anchorTokens.concat(token.children);
	// 			token.children = token.children.concat(anchorTokens);
	// 		}
	// 	}
	// });

	return renderMustache(markdownIt.render(md), templateParams);
}