import assert from "node:assert/strict";
import { createHash } from "node:crypto";
import { spawnSync } from "node:child_process";
import fs from "node:fs/promises";
import os from "node:os";
import path from "node:path";
import { after, test } from "node:test";
import { createRequire } from "node:module";
import { expectedLinuxAssets, writeChecksums, verifyLocal, verifyRemote, verifyPackagedUpdater, UPDATE_URL } from "../scripts/gitea-release.mjs";

const root = await fs.mkdtemp(path.join(os.tmpdir(), "lh-gitea-gate-"));
after(() => fs.rm(root, { recursive: true, force: true }));
const version = "0.4.0";
const names = expectedLinuxAssets(version);
async function fixture(name: string, appimageOnly = false, fixtureVersion = version) {
	const directory = path.join(root, name);
	await fs.mkdir(directory);
	const fixtureNames = expectedLinuxAssets(fixtureVersion, { appimageOnly });
	const contents = [Buffer.concat([Buffer.from([0x7f, 0x45, 0x4c, 0x46]), Buffer.from("AppImage fixture")]), ...(!appimageOnly ? [Buffer.from("!<arch>\nDebian fixture")] : [])];
	for (let i = 0; i < contents.length; i++) await fs.writeFile(path.join(directory, fixtureNames[i]!), contents[i]!);
	const entries = contents.map((data, i) => ({ url: fixtureNames[i], size: data.length, sha512: createHash("sha512").update(data).digest("base64") }));
	await fs.writeFile(path.join(directory, "latest-linux.yml"), JSON.stringify({ version: fixtureVersion, files: entries, path: entries[0]!.url, sha512: entries[0]!.sha512 }));
	await writeChecksums(directory, fixtureVersion, { appimageOnly });
	return directory;
}

test("Linux release inventory and Gitea feed match the current release scope", () => {
	assert.deepEqual(names, ["LearnHarness-0.4.0-x86_64.AppImage", "LearnHarness-0.4.0-amd64.deb", "latest-linux.yml", "SHA256SUMS"]);
	assert.equal(UPDATE_URL, "https://server2.sorokin-oleg-edu.xyz/replicated/learnharness/releases/download/latest");
	assert.throws(() => expectedLinuxAssets("0.4.0-preview"));
});
test("local verification checks actual installer bytes, updater hashes, sizes and checksum manifest", async () => {
	const directory = await fixture("healthy");
	const inventory = await verifyLocal(directory, version);
	assert.equal(inventory.length, 4);
	await fs.appendFile(path.join(directory, names[0]!), "tampered");
	await assert.rejects(verifyLocal(directory, version), /update size differs/);
});
test("updater cannot point at traversal paths, other versions, or substituted installer bytes", async () => {
	for (const [name, change, expected] of [
		["traversal", (feed: any) => { feed.files[0].url = "../outside.AppImage"; }, /reference exactly/],
		["version", (feed: any) => { feed.version = "0.3.7"; }, /metadata version/],
		["hash", (feed: any) => { feed.files[0].sha512 = "bad"; }, /update checksum/],
		["duplicate", (feed: any) => { feed.files.push({ ...feed.files[1] }); }, /reference exactly/],
	] as const) {
		const directory = await fixture(name);
		const file = path.join(directory, "latest-linux.yml");
		const feed = JSON.parse(await fs.readFile(file, "utf8")); change(feed); await fs.writeFile(file, JSON.stringify(feed));
		await writeChecksums(directory, version);
		await assert.rejects(verifyLocal(directory, version), expected);
	}
});
test("empty files and arbitrary downloads cannot pass as installers", async () => {
	const directory = await fixture("format");
	await fs.writeFile(path.join(directory, names[0]!), "<html>HTTP error</html>");
	await writeChecksums(directory, version);
	await assert.rejects(verifyLocal(directory, version), /invalid installer header/);
	await fs.writeFile(path.join(directory, names[0]!), "");
	await assert.rejects(verifyLocal(directory, version), /nonempty regular file/);
});
test("remote verification downloads and hashes every draft attachment, and refuses published or incomplete releases", async () => {
	const directory = await fixture("remote");
	const inventory = await verifyLocal(directory, version);
	const assets = inventory.map((asset) => ({ ...asset, browser_download_url: `https://server2.sorokin-oleg-edu.xyz/replicated/learnharness/releases/download/v0.4.0/${asset.name}` }));
	const release = { draft: true, prerelease: false, assets };
	const request = async (input: URL | RequestInfo) => {
		const url = input instanceof URL ? input : new URL(String(input));
		return new Response(await fs.readFile(path.join(directory, path.basename(url.pathname))));
	};
	await verifyRemote(release, inventory, {}, request as typeof fetch);
	await assert.rejects(verifyRemote({ ...release, draft: false }, inventory), /only a draft/);
	await assert.rejects(verifyRemote({ ...release, assets: assets.slice(1) }, inventory), /missing, duplicate/);
	await assert.rejects(verifyRemote(release, inventory, {}, (async () => new Response("wrong bytes")) as typeof fetch), /remote bytes differ/);
	await assert.rejects(verifyRemote({ ...release, assets: [{ ...assets[0], browser_download_url: "https://other.example/file" }, ...assets.slice(1)] }, inventory), /outside Gitea/);
});
test("release configuration preserves packaging while replacing the upstream update origin", async () => {
	const require = createRequire(import.meta.url);
	const yaml = require("js-yaml");
	const { getConfig } = require("app-builder-lib/out/util/config/config.js");
	const config = await getConfig(path.resolve(import.meta.dirname, ".."), "electron-builder.gitea.yml", null);
	assert.deepEqual(config.publish, { provider: "generic", url: UPDATE_URL });
	assert.equal(config.appId, "com.learnharness.LearnHarness");
	assert.deepEqual(config.linux.target.map((target: any) => target.target), ["AppImage", "deb"]);
	const workflow = yaml.load(await fs.readFile(new URL("../.gitea/workflows/release.yml", import.meta.url), "utf8"));
	assert(workflow.on.workflow_dispatch);
	assert(!workflow.on.pull_request, "untrusted pull requests must not run release publishing");
	assert.equal(workflow.permissions.releases, "write");
});
const scopedVersion = "0.6.0";
const scopedOptions = { appimageOnly: true };
const scopedNames = expectedLinuxAssets(scopedVersion, scopedOptions);

test("AppImage-only offline scope succeeds without deb; default full-release scope still requires deb", async () => {
	assert.deepEqual(scopedNames, ["LearnHarness-0.6.0-x86_64.AppImage", "latest-linux.yml", "SHA256SUMS"]);
	const directory = await fixture("scoped-healthy", true, scopedVersion);
	assert.deepEqual((await verifyLocal(directory, scopedVersion, scopedOptions)).map((asset) => asset.name), scopedNames);
	await assert.rejects(verifyLocal(directory, scopedVersion), /ENOENT.*amd64\.deb/);
	await assert.rejects(writeChecksums(directory, scopedVersion), /ENOENT.*amd64\.deb/);
	const full = await fixture("full-current", false, scopedVersion);
	assert.equal((await verifyLocal(full, scopedVersion)).length, 4);
	await assert.rejects(verifyLocal(full, scopedVersion, scopedOptions), /reference exactly/);
});

for (const [label, mutate, expected] of [
	["version", (feed: any) => { feed.version = "0.4.0"; }, /metadata version/],
	["missing-files", (feed: any) => { delete feed.files; }, /must contain files/],
	["duplicate", (feed: any) => { feed.files.push({ ...feed.files[0] }); }, /reference exactly/],
	["foreign-url", (feed: any) => { feed.files[0].url = `https://other.example/${scopedNames[0]}`; }, /reference exactly/],
	["traversal", (feed: any) => { feed.files[0].url = `../${scopedNames[0]}`; }, /reference exactly/],
	["absolute-path", (feed: any) => { feed.files[0].url = `/tmp/${scopedNames[0]}`; }, /reference exactly/],
	["wrong-filename", (feed: any) => { feed.files[0].url = "LearnHarness-0.4.0-x86_64.AppImage"; }, /reference exactly/],
	["sha512", (feed: any) => { feed.files[0].sha512 = "bad"; }, /update checksum/],
	["size", (feed: any) => { feed.files[0].size++; }, /update size/],
	["legacy-path", (feed: any) => { feed.path = "https://other.example/payload"; }, /legacy updater path/],
	["legacy-hash", (feed: any) => { feed.sha512 = "bad"; }, /legacy updater checksum/],
] as const) {
	test(`AppImage-only rejects ${label} metadata even with regenerated SHA256SUMS`, async () => {
		const directory = await fixture(`scoped-${label}`, true, scopedVersion);
		const file = path.join(directory, "latest-linux.yml");
		const feed = JSON.parse(await fs.readFile(file, "utf8"));
		mutate(feed);
		await fs.writeFile(file, JSON.stringify(feed));
		await writeChecksums(directory, scopedVersion, scopedOptions);
		await assert.rejects(verifyLocal(directory, scopedVersion, scopedOptions), expected);
	});
}

test("AppImage-only rejects malformed YAML and stale SHA256 manifest", async () => {
	const directory = await fixture("scoped-malformed", true, scopedVersion);
	await fs.writeFile(path.join(directory, "SHA256SUMS"), "0".repeat(64) + `  ${scopedNames[0]}\n`);
	await assert.rejects(verifyLocal(directory, scopedVersion, scopedOptions), /SHA256SUMS/);
	await fs.writeFile(path.join(directory, "latest-linux.yml"), "version: [unclosed");
	await writeChecksums(directory, scopedVersion, scopedOptions);
	await assert.rejects(verifyLocal(directory, scopedVersion, scopedOptions), /unexpected end/);
});

for (const kind of ["missing", "empty", "directory", "symlink", "corrupt"] as const) {
	test(`AppImage-only fails closed on ${kind} installer`, async () => {
		const directory = await fixture(`scoped-installer-${kind}`, true, scopedVersion);
		const file = path.join(directory, scopedNames[0]!);
		await fs.rm(file);
		if (kind === "empty") await fs.writeFile(file, "");
		if (kind === "directory") await fs.mkdir(file);
		if (kind === "symlink") await fs.symlink("latest-linux.yml", file);
		if (kind === "corrupt") {
			await fs.writeFile(file, "<html>download failed</html>");
			await writeChecksums(directory, scopedVersion, scopedOptions);
		} else await assert.rejects(writeChecksums(directory, scopedVersion, scopedOptions), /ENOENT|nonempty regular file/);
		await assert.rejects(verifyLocal(directory, scopedVersion, scopedOptions), /ENOENT|nonempty regular file|invalid installer header/);
	});
}

test("CLI retains positional directory for scoped offline commands and rejects remote scope before auth or network", async () => {
	const pkg = JSON.parse(await fs.readFile(new URL("../package.json", import.meta.url), "utf8"));
	const directory = await fixture("scoped-cli", true, pkg.version);
	const run = (...args: string[]) => spawnSync(process.execPath, [path.resolve(import.meta.dirname, "../scripts/gitea-release.mjs"), ...args], {
		encoding: "utf8", timeout: 10_000,
	});
	for (const command of ["checksums", "verify"]) {
		const result = run(command, directory, "--appimage-only");
		assert.equal(result.status, 0, result.stderr);
	}
	const defaultResult = run("verify", directory);
	assert.equal(defaultResult.status, 1);
	assert.match(defaultResult.stderr, /amd64\.deb/);
	for (const command of ["upload", "verify-remote", "verify-package"]) {
		const result = run(command, directory, "--appimage-only");
		assert.equal(result.status, 1);
		assert.match(result.stderr, /supported only by offline/);
	}
	for (const args of [["--unknown"], ["--appimage-only", "--appimage-only"], [directory, "extra"]]) {
		assert.equal(run("verify", ...args).status, 1);
	}
});

test("packaged updater verification refuses inherited GitHub or incorrect generic destinations", async () => {
	const directory = path.join(root, "package");
	await fs.mkdir(path.join(directory, "resources"), { recursive: true });
	const file = path.join(directory, "resources", "app-update.yml");
	await fs.writeFile(file, JSON.stringify({ provider: "github", owner: "amosblomqvist", repo: "learnharness" }));
	await assert.rejects(verifyPackagedUpdater(directory), /Gitea generic provider/);
	await fs.writeFile(file, JSON.stringify({ provider: "generic", url: "https://other.example" }));
	await assert.rejects(verifyPackagedUpdater(directory), /public Gitea release feed/);
	await fs.writeFile(file, JSON.stringify({ provider: "generic", url: UPDATE_URL }));
	await verifyPackagedUpdater(directory);
});