const {ejs} = require("../basic")
const DOMPurify = require("dompurify")
const {resolveMxc} = require("../functions")
const {Event} = require("./event")

const purifier = DOMPurify()
purifier.addHook("afterSanitizeAttributes", (node, hookevent, config) => {
	if (node.tagName == "img") {
		let src = node.getAttribute("src")
		if (src) src = resolveMxc(src)

		node.setAttribute("src", src)

	}
	if (node.tagName = "a") {
		node.setAttribute("rel", "noopener")
	}
	return node

})

function sanitize(html) {
	return purifier.sanitize(html, DOMPURIFY_CONFIG)
}
const DOMPURIFY_CONFIG = {
	ALLOWED_URI_REGEXP: /^mxc:\/\/[a-zA-Z0-9\.]+\/[a-zA-Z0-9]+$/, // As per the spec we only allow mxc uris
	ALLOWED_TAGS: ['font', 'del', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'blockquote', 'p', 'a', 'ul', 'ol', 'sup', 'sub', 'li', 'b', 'i', 'u', 'strong', 'em', 'strike', 'code', 'hr', 'br', 'div', 'table', 'thead', 'tbody', 'tr', 'th', 'td', 'caption', 'pre', 'span', 'img'],
};

class HTMLMessage extends Event {
	render() {
		super.render()
		let html = this.data.content.formatted_body
		const content = ejs("div")
		html = sanitize(html)
		content.html(html)
		this.child(content)
	}

	static canRender(event) {
		const content = event.content
		return event.type == "m.room.message" && content.msgtype == "m.text" && content.format == "org.matrix.custom.html" && content.formatted_body

	}

	canGroup() {
		return true
	}

}

class TextMessage extends Event {
	render() {
		super.render()
		return this.text(this.data.content.body)
	}

	static canRender(event) {
		return event.type == "m.room.message"
	}

	canGroup() {
		return true
	}
}

module.exports = [HTMLMessage, TextMessage]