// Covers §24's Downloads section: counts per UTC day, the last 30 days per repo or across all,
// each repo's totals, the most downloaded files, and dropping days older than 400.

import { afterAll, beforeAll, describe, expect, setSystemTime, test } from "bun:test";
import { Browser, type Instance, instance } from "./browser.ts";
import { makeRepos, writeRelease } from "./fixture.ts";

describe("download analytics (§24)", () => {
	let inst: Instance;
	let operator: Browser;
	const at = (iso: string) => setSystemTime(new Date(iso));
	const download = (repo: string, platform: string) =>
		inst.app.request(`/${repo}/releases/1.0.0/${platform}`);
	const page = async (query = "") => (await operator.get(`/admin/downloads${query}`)).text();

	beforeAll(async () => {
		at("2026-09-30T12:00:00Z");
		const repos = await makeRepos(["app", "tools"]);
		for (const repo of ["app", "tools"]) {
			await writeRelease(repos.bucketDir, repo, {
				version: "1.0.0",
				save: repos.saves[repo] as string,
				files: [
					{ platform: "linux-x86_64", name: repo, bytes: new Uint8Array([1]) },
					{ platform: "macos-aarch64", name: repo, bytes: new Uint8Array([2]) },
				],
			});
		}
		inst = await instance(repos.bucketDir);
		operator = new Browser(inst.app);
		await operator.signIn();
		for (const repo of ["app", "tools"])
			await operator.post(`/admin/repos/${repo}`, { public: "1" });
		at("2025-08-01T12:00:00Z");
		await download("app", "linux-x86_64");
		at("2026-09-28T23:59:00Z");
		await download("app", "linux-x86_64");
		await download("app", "macos-aarch64");
		at("2026-09-30T00:01:00Z");
		await download("app", "linux-x86_64");
		await download("tools", "linux-x86_64");
	});
	afterAll(() => setSystemTime());

	test("each download counts toward its repo's UTC day, and days past 400 are dropped", () => {
		const days = inst.kepr
			.query("SELECT repo, day, count FROM download_days ORDER BY day, repo")
			.all();
		expect(days).toEqual([
			{ repo: "app", day: "2026-09-28", count: 2 },
			{ repo: "app", day: "2026-09-30", count: 1 },
			{ repo: "tools", day: "2026-09-30", count: 1 },
		]);
	});

	test("the section shows 30 days, each repo's totals and the top files", async () => {
		const html = await page();
		expect(html).toContain('<meter min="0" max="2" value="2"');
		expect(html).toContain("2026-09-28");
		expect(html).not.toContain("2026-08-31");
		expect(html).toContain("2026-09-01");
		expect(html).toMatch(/app<\/a>\s*<span[^>]*>4 downloads · 3 in 30 days<\/span>/);
		expect(html.indexOf("app 1.0.0 linux-x86_64")).toBeLessThan(
			html.indexOf("tools 1.0.0 linux-x86_64"),
		);
	});

	test("one repo narrows the days, and an unknown one narrows nothing", async () => {
		const tools = await page("?repo=tools");
		expect(tools).toContain('<meter min="0" max="1" value="1"');
		expect(tools).not.toContain('value="2"');
		expect(await page("?repo=nowhere")).toContain('<meter min="0" max="2" value="2"');
	});
});