import type { Database } from "bun:sqlite";
import { beforeAll, describe, expect, test } from "bun:test";
import { mkdtemp, writeFile } from "node:fs/promises";
import { tmpdir } from "node:os";
import { join } from "node:path";
import type { Hono } from "hono";
import { openBucket } from "../src/bucket/reader.ts";
import { type SyncTarget, syncAll } from "../src/bucket/sync.ts";
import { openMirror } from "../src/mirror/store.ts";
import { compareVersions, visibleReleases } from "../src/releases/releases.ts";
import { createApp } from "../src/server/app.ts";
import { openKeprDb } from "../src/server/db.ts";
import { makeRepos, writeRelease } from "./fixture.ts";

const bytes = (text: string) => new TextEncoder().encode(text);

describe("release reading in sync", () => {
	let bucketDir: string;
	let save: string;
	let target: SyncTarget;
	const releases = () =>
		visibleReleases(target.kepr, openMirror(target.mirrorDir, "app"), "app").map((r) => r.version);
	const lastError = () =>
		(target.kepr.query("SELECT last_sync_error FROM repos").get() as { last_sync_error: string })
			.last_sync_error;

	beforeAll(async () => {
		const repos = await makeRepos(["app"]);
		bucketDir = repos.bucketDir;
		save = repos.saves.app as string;
		const dataDir = await mkdtemp(join(tmpdir(), "kepr-releases-"));
		target = {
			bucket: openBucket({ kind: "folder", path: bucketDir }),
			kepr: openKeprDb(dataDir),
			mirrorDir: join(dataDir, "mirror"),
			tarballDir: join(dataDir, "tarballs"),
		};
		for (const version of ["1.9.0", "1.10.0", "1.2.3"]) {
			const files = [{ platform: "linux-x86_64", name: "app", bytes: bytes(version) }];
			await writeRelease(bucketDir, "app", { version, save, files }, version === "1.10.0");
		}
		await syncAll(target);
	});

	test("reads every release.json, newest first by number", () => {
		expect(lastError()).toBeNull();
		expect(releases()).toEqual(["1.10.0", "1.9.0", "1.2.3"]);
	});

	test("a version folder without release.json does not exist, and nothing is re-read until latest moves", async () => {
		await writeFile(join(bucketDir, "app/releases/2.0.0.tmp"), "half-written");
		const orphan = join(bucketDir, "app/releases/3.0.0/linux-x86_64");
		await Bun.write(join(orphan, "app"), "no record yet");
		await writeRelease(
			bucketDir,
			"app",
			{
				version: "1.11.0",
				save,
				files: [{ platform: "linux-x86_64", name: "app", bytes: bytes("x") }],
			},
			false,
		);
		await syncAll(target);
		expect(releases()).toEqual(["1.10.0", "1.9.0", "1.2.3"]);
		await writeFile(join(bucketDir, "app/releases/latest"), "1.11.0");
		await syncAll(target);
		expect(releases()).toEqual(["1.11.0", "1.10.0", "1.9.0", "1.2.3"]);
	});

	test("hidden versions drop out and a notes override replaces the record's notes", () => {
		target.kepr.run(
			"INSERT INTO release_settings (repo, version, hidden, notes) VALUES ('app', '1.11.0', 1, NULL), ('app', '1.9.0', 0, 'Operator notes.')",
		);
		const shown = visibleReleases(target.kepr, openMirror(target.mirrorDir, "app"), "app");
		expect(shown.map((r) => [r.version, r.notes])).toEqual([
			["1.10.0", ""],
			["1.9.0", "Operator notes."],
			["1.2.3", ""],
		]);
		target.kepr.run("DELETE FROM release_settings");
	});

	test("a release record that breaks §11.2 is the repo's last sync error", async () => {
		await writeRelease(bucketDir, "app", {
			version: "1.12.0",
			save,
			files: [{ platform: "plan9-mips", name: "app", bytes: bytes("x") }],
		});
		await syncAll(target);
		expect(lastError()).toContain("release record does not match");
		await writeRelease(bucketDir, "app", {
			version: "1.12.0",
			save,
			files: [{ platform: "linux-x86_64", name: "../app", bytes: bytes("x") }],
		});
		await syncAll(target);
		expect(lastError()).toContain("release record does not match");
	});
});

test("versions compare as numbers, segment by segment", () => {
	const sorted = ["1.10.0", "1.9.9", "2", "1.9", "0.0.0", "1.10", "10.0.0"].sort(compareVersions);
	expect(sorted).toEqual(["0.0.0", "1.9", "1.9.9", "1.10", "1.10.0", "2", "10.0.0"]);
});

describe("the builds panel", () => {
	let app: Hono;
	let saves: Record<string, string>;
	const get = (path: string) => app.request(path);

	beforeAll(async () => {
		const repos = await makeRepos(["tool", "secret"]);
		saves = repos.saves;
		const tool = saves.tool as string;
		const b = repos.bucketDir;
		await writeRelease(b, "tool", {
			version: "0.9.0",
			save: tool,
			notes: "## Fixes\n\n- the *first* fix <script>",
			files: [{ platform: "linux-x86_64", name: "tool", bytes: bytes("old") }],
		});
		await writeRelease(b, "tool", {
			version: "0.10.0",
			save: tool,
			publishedAt: 1790100000,
			files: [
				{ platform: "macos-aarch64", name: "Tool.app.zip", bytes: bytes("mac") },
				{ platform: "android-arm64", name: "tool-0.10.0.apk", bytes: bytes("apk") },
			],
		});
		await writeRelease(b, "tool", {
			version: "0.11.0",
			save: "aaaaaaaaaaaa",
			files: [{ platform: "linux-x86_64", name: "tool", bytes: bytes("new") }],
		});
		await writeRelease(b, "secret", {
			version: "1.0.0",
			save: saves.secret as string,
			files: [{ platform: "linux-x86_64", name: "s", bytes: bytes("s") }],
		});
		app = await releaseApp(b, (kepr) => {
			kepr.run("UPDATE repos SET public = 1 WHERE name = 'tool'");
			kepr.run(
				"INSERT INTO downloads (repo, version, platform, count) VALUES ('tool', '0.10.0', 'android-arm64', 7)",
			);
		});
	});

	test("lists versions newest first with their save, date, notes and files", async () => {
		const res = await get("/tool/releases");
		expect(res.status).toBe(200);
		const body = await res.text();
		const order = ["v0.11.0", "v0.10.0", "v0.9.0"].map((v) => body.indexOf(`>${v}<`));
		expect(order).toEqual([...order].sort((x, y) => x - y));
		expect(order[0]).toBeGreaterThan(0);
		expect(body).toContain(`href="/tool/saves/${saves.tool}"`);
		expect(body).toContain("2026-09-22 18:00");
		expect(body).toContain("<h2>Fixes</h2>");
		expect(body).toContain("&lt;script&gt;");
		// Empty notes: the save's message, or Kepr 2's line when the save is unknown.
		expect(body).toContain("<p>release tool</p>");
		expect(body).toContain("<p>Release 0.11.0 of tool.</p>");
	});

	test("each file shows its label, size, SHA-256, download count and install hint", async () => {
		const body = await (await get("/tool/releases")).text();
		expect(body).toContain("Android · ARM64");
		expect(body).toContain("macOS · Apple Silicon");
		expect(body).toContain('href="/tool/releases/0.10.0/tool-android-arm64"');
		expect(body).toContain("3 B · 7 downloads");
		expect(body).toContain(new Bun.CryptoHasher("sha256").update("apk").digest("hex"));
		expect(body).toContain("unzip and drag to Applications");
		expect(body).toContain(
			"open on your device to install — allow installs from this source if prompted",
		);
	});

	test("hidden versions don't show, and the repo header names the newest visible release", async () => {
		expect(await (await get("/tool")).text()).toContain("v0.11.0 · ");
		const kepr = releaseKepr.get(app);
		kepr?.run("INSERT INTO release_settings (repo, version, hidden) VALUES ('tool', '0.11.0', 1)");
		const body = await (await get("/tool/releases")).text();
		expect(body).not.toContain("0.11.0");
		expect(await (await get("/tool")).text()).toContain("v0.10.0 · ");
		kepr?.run("DELETE FROM release_settings");
	});

	test("a private repo's builds are a 404", async () => {
		expect((await get("/secret/releases")).status).toBe(404);
	});
});

const releaseKepr = new WeakMap<Hono, Database>();

/** Syncs a folder remote into a fresh data dir and serves it as kepr.example. */
async function releaseApp(bucketDir: string, setup: (kepr: Database) => void): Promise<Hono> {
	const dataDir = await mkdtemp(join(tmpdir(), "kepr-release-app-"));
	const kepr = openKeprDb(dataDir);
	const bucket = openBucket({ kind: "folder", path: bucketDir });
	await syncAll({
		bucket,
		kepr,
		mirrorDir: join(dataDir, "mirror"),
		tarballDir: join(dataDir, "tarballs"),
	});
	setup(kepr);
	const app = createApp(
		{
			domain: "kepr.example",
			dataDir,
			adminPasswordHash: "$argon2id$x",
			bucket: { kind: "folder", path: bucketDir },
		},
		kepr,
	);
	releaseKepr.set(app, kepr);
	return app;
}