"use strict";

const cheerio = require("cheerio");
const url = require("url");

const assureResponse = require("../../shared/assure-response");
const getUntaggedText = require("../../shared/get-untagged-text");

module.exports = function scrapeProduct({ session }) {
	return async function({ data, createItem, updateData, expireDependents }) {
		if (data.productFolderUrl == null) {
			throw new Error(`No known product page URL`);
		}

		let productPageURL = url.resolve("https://www.st.com/", data.productFolderUrl);

		let response = await session.get(productPageURL);
		assureResponse(response);

		let $ = cheerio.load(response.body);

		let datasheetLink = $("a[data-js='datasheetLink']").attr("href");
		let datasheetURL = (datasheetLink != null)
			? url.resolve(productPageURL, datasheetLink)
			: null;

		let resources = $(".st-table--resources")
			.find("h3").toArray()
			.map((heading) => {
				let $heading = $(heading);
				let sectionID = $heading.attr("id");
				let sectionTitle = $heading.text().trim();

				let $table = $heading.next("table");

				let items = $table
					.find("tbody tr").toArray()
					.map((row) => {
						let $row = $(row);
						let $mainView = $row.find(".visible-on-desktop-only");
						let $link = $mainView.find("a.st-link");

						return {
							url: url.resolve(productPageURL, $link.attr("href")),
							documentID: $link.find("span.st-font--bold").text().trim(),
							description: $link.find("span:not(.st-font--bold)").text().trim(),
							version: getUntaggedText($link),
							date: $row.find(".visible-on-desktop-only[data-latest-update]").text().trim()
						};
					});

				return {
					sectionID: sectionID,
					sectionTitle: sectionTitle,
					items: items
				};
			});

		updateData((data) => {
			return {
				... data,
				datasheetLink: datasheetURL,
				resources: resources
			};
		});

		expireDependents();

		for (let section of resources) {
			for (let resource of section.items) {
				createItem({
					id: `st:resource:${resource.url}`,
					tags: (resource.url === datasheetURL)
						? [ "st:resource", "st:datasheet" ]
						: [ "st_resource" ],
					data: { url: resource.url }
				});
			}
		}
	};
};