// Covers the console's Account section (June, 2026-09-30): the admin password, other sessions and
// the domain, all changed without touching kepr.toml by hand, and applied without a restart. Also
// §24's two-step sign-in, which is set up here and then used at /sign-in.

import { afterAll, beforeAll, describe, expect, setSystemTime, test } from "bun:test";
import { join } from "node:path";
import { createApp } from "../src/server/app.ts";
import { loadConfig, saveConfig } from "../src/server/config.ts";
import { codeAt } from "../src/server/totp.ts";
import { Browser, type Instance, instance, PASSWORD } from "./browser.ts";
import { makeRepos } from "./fixture.ts";

const NEW_PASSWORD = "a much longer passphrase now";

describe("the Account section", () => {
	let inst: Instance;
	let operator: Browser;
	let configPath: string;
	const change = (fields: Record<string, string>) =>
		operator.post("/admin/account", { action: "password", ...fields });

	beforeAll(async () => {
		const repos = await makeRepos(["app"]);
		inst = await instance(repos.bucketDir);
		configPath = join(inst.dataDir, "kepr.toml");
		await saveConfig(configPath, inst.config);
		inst.app = createApp(inst.config, inst.kepr, undefined, configPath);
		operator = new Browser(inst.app);
		await operator.signIn();
	});

	test("lists the sections's forms and never the hash", async () => {
		const page = await (await operator.get("/admin/account")).text();
		expect(page).toContain('name="current_password"');
		expect(page).toContain('value="kepr.example"');
		expect(page).not.toContain("$argon2id$");
	});

	test("refuses a wrong current password, a short one, or a mismatch", async () => {
		const cases: [Record<string, string>, string][] = [
			[
				{ current_password: "wrong", password: NEW_PASSWORD, confirm: NEW_PASSWORD },
				"The current password is not right.",
			],
			[
				{ current_password: PASSWORD, password: "short", confirm: "short" },
				"at least 12 characters",
			],
			[
				{ current_password: PASSWORD, password: NEW_PASSWORD, confirm: "different" },
				"The two new passwords differ.",
			],
		];
		for (const [fields, error] of cases) {
			const response = await change(fields);
			expect(response.status).toBe(400);
			expect(await response.text()).toContain(error);
		}
		expect(
			await Bun.password.verify(PASSWORD, (await loadConfig(configPath)).adminPasswordHash),
		).toBe(true);
	});

	test("a new password is saved, works at once, and signs every other session out", async () => {
		const other = new Browser(inst.app, "198.51.100.9");
		await other.signIn();
		const response = await change({
			current_password: PASSWORD,
			password: NEW_PASSWORD,
			confirm: NEW_PASSWORD,
		});
		expect(response.status).toBe(303);
		const saved = await loadConfig(configPath);
		expect(await Bun.password.verify(NEW_PASSWORD, saved.adminPasswordHash)).toBe(true);
		expect((await other.get("/admin")).status).toBe(401);
		expect((await operator.get("/admin")).status).toBe(200);
		expect((await new Browser(inst.app, "198.51.100.10").signIn(PASSWORD)).status).toBe(401);
		expect((await new Browser(inst.app, "198.51.100.11").signIn(NEW_PASSWORD)).status).toBe(303);
	});

	test("signing out everywhere else keeps only this session", async () => {
		const other = new Browser(inst.app, "198.51.100.12");
		await other.signIn(NEW_PASSWORD);
		expect(await (await operator.get("/admin/account")).text()).toMatch(
			/[2-9] sessions? signed in/,
		);
		expect((await operator.post("/admin/account", { action: "sessions" })).status).toBe(303);
		expect((await other.get("/admin")).status).toBe(401);
		expect((await operator.get("/admin")).status).toBe(200);
	});

	test("the domain is checked, saved, and used at once", async () => {
		const bad = await operator.post("/admin/account", { action: "domain", domain: "not a domain" });
		expect(bad.status).toBe(400);
		const moved = await operator.post("/admin/account", {
			action: "domain",
			domain: "code.example",
		});
		expect(moved.status).toBe(303);
		expect((await loadConfig(configPath)).domain).toBe("code.example");
		const origin = "https://code.example";
		expect((await operator.post("/admin/sync", {}, origin)).status).toBe(303);
		expect((await operator.post("/admin/sync", {})).status).toBe(403);
		const page = await (await operator.get("/admin/account")).text();
		expect(page).toContain('<link rel="canonical" href="https://code.example/admin/account">');
	});
});

describe("two-step sign-in (§24)", () => {
	let inst: Instance;
	let operator: Browser;
	let configPath: string;
	const at = Date.parse("2026-10-08T12:00:00Z");
	const seconds = (offset: number) => Math.floor(at / 1000) + offset;

	beforeAll(async () => {
		setSystemTime(new Date(at));
		const repos = await makeRepos(["app"]);
		inst = await instance(repos.bucketDir);
		configPath = join(inst.dataDir, "kepr.toml");
		await saveConfig(configPath, inst.config);
		inst.app = createApp(inst.config, inst.kepr, undefined, configPath);
		operator = new Browser(inst.app);
		await operator.signIn();
	});
	afterAll(() => setSystemTime());

	test("a key is offered, and only a code from it turns two-step on", async () => {
		const offered = await (await operator.post("/admin/account", { action: "totp-start" })).text();
		const secret = /key: ([A-Z2-7]{32})/.exec(offered)?.[1] ?? "";
		expect(secret).toHaveLength(32);
		expect(offered).toContain("otpauth://totp/kepr:kepr.example");
		expect(inst.config.totpSecret).toBeUndefined();
		const wrong = await operator.post("/admin/account", {
			action: "totp-confirm",
			secret,
			code: "000000",
		});
		expect(wrong.status).toBe(400);
		expect(inst.config.totpSecret).toBeUndefined();
		const confirmed = await operator.post("/admin/account", {
			action: "totp-confirm",
			secret,
			code: codeAt(secret, seconds(0)) ?? "",
		});
		expect(confirmed.status).toBe(303);
		expect(inst.config.totpSecret).toBe(secret);
		expect((await loadConfig(configPath)).totpSecret).toBe(secret);
	});

	test("sign-in then takes the code as well, and a code signs in once", async () => {
		const secret = inst.config.totpSecret ?? "";
		const bare = new Browser(inst.app, "198.51.100.90");
		expect((await bare.signIn(PASSWORD)).status).toBe(401);
		const wrong = new Browser(inst.app, "198.51.100.91");
		expect((await wrong.signIn(PASSWORD, "000000")).status).toBe(401);
		// The code that set it up is spent, so a later step's code is the one to use.
		const code = codeAt(secret, seconds(30)) ?? "";
		const fresh = new Browser(inst.app, "198.51.100.92");
		expect((await fresh.signIn(PASSWORD, code)).status).toBe(303);
		expect((await fresh.get("/admin")).status).toBe(200);
		const replay = new Browser(inst.app, "198.51.100.93");
		expect((await replay.signIn(PASSWORD, code)).status).toBe(401);
	});

	test("turning it off takes the password, and then the password alone signs in", async () => {
		const wrong = await operator.post("/admin/account", {
			action: "totp-off",
			current_password: "not the password",
		});
		expect(wrong.status).toBe(400);
		expect(inst.config.totpSecret).toBeDefined();
		const off = await operator.post("/admin/account", {
			action: "totp-off",
			current_password: PASSWORD,
		});
		expect(off.status).toBe(303);
		expect(inst.config.totpSecret).toBeUndefined();
		expect((await loadConfig(configPath)).totpSecret).toBeUndefined();
		const plain = new Browser(inst.app, "198.51.100.94");
		expect((await plain.signIn(PASSWORD)).status).toBe(303);
	});
});