import { describe, expect, it } from "vitest";
import { renderDocument, renderMarkup } from "$lib/markup/render";
import type { MarkupContext } from "$lib/markup/paths";

const ctx: MarkupContext = { repo: "ada.test/infra", ref: "main", host: "tangled.org" };

const keyOf = (html: string | null): string => {
	const key = /^<div data-markup-key="([^"]+)">/.exec(html ?? "")?.[1];
	if (!key) throw new Error(`no markup key in ${html}`);
	return key;
};

describe("renderDocument", () => {
	it("wraps what it renders under a key", async () => {
		const html = await renderDocument("README.md", "# hello", ctx);
		expect(keyOf(html)).toMatch(/^[0-9a-z]+\.[0-9a-z]+\.[0-9a-z]+$/);
		expect(html).toContain("<h1");
		expect(html).toContain("hello");
	});

	it("keeps a document that is not markdown away from the renderer", async () => {
		expect(await renderDocument("notes.txt", "# hello", ctx)).toBeNull();
	});

	it("keys the same contents rendered elsewhere apart", async () => {
		const here = keyOf(await renderDocument("README.md", "see [x](y)", ctx));
		const elsewhere = keyOf(
			await renderDocument("README.md", "see [x](y)", { ...ctx, ref: "dev" })
		);
		const copied = keyOf(await renderDocument("docs/README.md", "see [x](y)", ctx));
		expect(elsewhere).not.toBe(here);
		expect(copied).not.toBe(here);
	});

	it("keys different contents apart", async () => {
		expect(keyOf(await renderDocument("README.md", "# a", ctx))).not.toBe(
			keyOf(await renderDocument("README.md", "# b", ctx))
		);
	});

	it("gives the same contents the same key every time", async () => {
		expect(keyOf(await renderDocument("README.md", "# a", ctx))).toBe(
			keyOf(await renderDocument("README.md", "# a", ctx))
		);
	});
});

describe("renderMarkup", () => {
	// a body and a file with the same contents need different keys
	it("wraps a body under a key of its own", async () => {
		const html = await renderMarkup("a **body**", ctx);
		expect(html).toContain("<strong>body</strong>");
		expect(keyOf(html)).not.toBe(keyOf(await renderDocument("README.md", "a **body**", ctx)));
	});
});