import {
  existsSync,
  mkdtempSync,
  readFileSync,
  rmSync,
  statSync,
  writeFileSync,
} from "node:fs";
import { tmpdir } from "node:os";
import { join } from "node:path";
import { afterEach, describe, expect, test } from "vitest";

import { WorkspaceSecretStore } from "../src/workspaces/secret-store.js";

const roots: string[] = [];

function fixture() {
  const root = mkdtempSync(join(tmpdir(), "thoth-workspace-secret-store-"));
  const runtimeRoot = mkdtempSync(join(tmpdir(), "thoth-workspace-secret-runtime-"));
  roots.push(root, runtimeRoot);
  return {
    root,
    runtimeRoot,
    store: new WorkspaceSecretStore({
      root,
      runtimeRoot,
      installationId: "installation-test",
    }),
  };
}

afterEach(() => {
  for (const root of roots.splice(0)) rmSync(root, { recursive: true, force: true });
});

describe("WorkspaceSecretStore", () => {
  test("persists ciphertext and exposes status without exposing plaintext", () => {
    const { root, store } = fixture();
    const secret = "correct horse battery staple";

    store.put("psd-clinical", "dwh.password", secret);

    expect(store.has("psd-clinical", "dwh.password")).toBe(true);
    expect(store.configured("psd-clinical")).toEqual(["dwh.password"]);
    const vault = readFileSync(join(root, "vault.json"), "utf8");
    expect(vault).not.toContain(secret);
    expect(statSync(join(root, "vault.json")).mode & 0o777).toBe(0o600);
    expect(statSync(join(root, "master.key")).mode & 0o777).toBe(0o600);
  });

  test("blind replacement changes the materialized value and forget removes it", () => {
    const { store } = fixture();
    store.put("psd-clinical", "dwh.password", "old-value");
    store.put("psd-clinical", "dwh.password", "new-value");

    const lease = store.materialize("psd-clinical", ["dwh.password"]);
    const path = lease.files.get("dwh.password");
    expect(path).toBeDefined();
    expect(readFileSync(path!, "utf8")).toBe("new-value");
    expect(statSync(path!).mode & 0o777).toBe(0o400);
    lease.release();
    expect(existsSync(path!)).toBe(false);

    store.forget("psd-clinical", "dwh.password");
    expect(store.has("psd-clinical", "dwh.password")).toBe(false);
  });

  test("materializes only requested secrets and cleans the whole lease directory", () => {
    const { runtimeRoot, store } = fixture();
    store.putMany("psd-clinical", {
      "dwh.password": "warehouse-password",
      "evidence.api_key": "evidence-key",
    });

    const lease = store.materialize("psd-clinical", ["evidence.api_key"]);
    expect([...lease.files.keys()]).toEqual(["evidence.api_key"]);
    expect(readFileSync(lease.files.get("evidence.api_key")!, "utf8")).toBe("evidence-key");
    expect(statSync(runtimeRoot).mode & 0o777).toBe(0o700);
    const directory = join(lease.files.get("evidence.api_key")!, "..");
    lease.release();
    expect(existsSync(directory)).toBe(false);
  });

  test("fails closed with a sanitized error when the encrypted vault is tampered", () => {
    const { root, store } = fixture();
    const secret = "must-never-appear-in-errors";
    store.put("psd-clinical", "dwh.password", secret);

    const path = join(root, "vault.json");
    const document = JSON.parse(readFileSync(path, "utf8")) as {
      entries: Record<string, { ciphertext: string }>;
    };
    const record = Object.values(document.entries)[0]!;
    record.ciphertext = Buffer.from("tampered").toString("base64");
    writeFileSync(path, JSON.stringify(document), { mode: 0o600 });

    expect(() => store.materialize("psd-clinical", ["dwh.password"]))
      .toThrow("Workspace secret store is unavailable.");
    try {
      store.materialize("psd-clinical", ["dwh.password"]);
    } catch (error) {
      expect(String(error)).not.toContain(secret);
    }
  });

  test("rejects invalid identifiers and oversized values", () => {
    const { store } = fixture();
    expect(() => store.put("../workspace", "dwh.password", "secret")).toThrow();
    expect(() => store.put("psd-clinical", "../password", "secret")).toThrow();
    expect(() => store.put("psd-clinical", "dwh.password", "x".repeat(65_537))).toThrow();
  });
});