import { test, expect } from "vitest";
import Fastify from "fastify";
import { authPreHandler, getPrincipal } from "../src/auth/auth.js";
import { chmodSync, mkdtempSync, rmSync, statSync } from "node:fs";
import { tmpdir } from "node:os";
import { join } from "node:path";
import { expandLocalHome, localPrincipal } from "../src/auth/principal.js";

test("local mode resolves a stable local principal", async () => {
  const app = Fastify();
  app.addHook("preHandler", authPreHandler("none"));
  app.get("/me", async (req) => getPrincipal(req));
  expect((await app.inject({ method: "GET", url: "/me" })).json()).toMatchObject({
    issuer: "local",
    subject: expect.any(String),
    isAdmin: false,
  });
});

test("mock mode makes a principal from the test header", async () => {
  const app = Fastify();
  app.addHook("preHandler", authPreHandler("mock"));
  app.get("/me", async (req) => getPrincipal(req));
  const res = await app.inject({
    method: "GET",
    url: "/me",
    headers: { "x-mock-user": "alice" },
  });
  expect(res.json()).toEqual({ issuer: "mock", subject: "alice", displayName: "alice", isAdmin: false });
});

test("upstream mode accepts only normalized proxy principal headers", async () => {
  const app = Fastify();
  app.addHook("preHandler", authPreHandler("upstream"));
  app.get("/me", async (req) => getPrincipal(req));

  expect((await app.inject({ method: "GET", url: "/me" })).statusCode).toBe(401);
  const authenticated = await app.inject({
    method: "GET",
    url: "/me",
    headers: {
      "x-thoth-principal-issuer": "portal",
      "x-thoth-principal-subject": "42",
      "x-thoth-principal-display-name": "Alice",
      "x-thoth-is-admin": "1",
      "x-authenticated-user": "must-not-be-used",
    },
  });
  expect(authenticated.json()).toEqual({
    issuer: "portal", subject: "42", displayName: "Alice", isAdmin: true,
  });
});

test("local identity expands tilde homes and restores private POSIX permissions", () => {
  expect(expandLocalHome("~/thoth-test", "/home/tester")).toBe("/home/tester/thoth-test");
  expect(expandLocalHome("~", "/home/tester")).toBe("/home/tester");
  const home = mkdtempSync(join(tmpdir(), "thoth-principal-"));
  chmodSync(home, 0o755);
  const previous = process.env.THT_HOME;
  process.env.THT_HOME = home;
  try {
    localPrincipal();
    if (process.platform !== "win32") {
      expect(statSync(home).mode & 0o777).toBe(0o700);
      expect(statSync(join(home, "identity.json")).mode & 0o777).toBe(0o600);
    }
  } finally {
    if (previous === undefined) delete process.env.THT_HOME; else process.env.THT_HOME = previous;
    rmSync(home, { recursive: true, force: true });
  }
});