import { afterEach, beforeEach, describe, expect, it } from "vitest";
import { createTestDb } from "@parking/db/testing";
import { type Db } from "@parking/db";
import type { FastifyInstance } from "fastify";
import { buildServer } from "../server.js";
import { seedUser, login } from "../test-helpers.js";

// HTTP integration: boot the REAL Fastify app over a fresh in-memory DB (no listen —
// app.inject drives it) and exercise the auth + RBAC guards end to end. The point is the
// security seam: no token → 401, wrong permission → 403, CSRF required on mutations, and
// a correctly-scoped user passes. (vitest.config sets JWT_SECRET/EVENT_SIGNING_KEY.)

let db: Db;
let close: () => void;
let app: FastifyInstance;

beforeEach(async () => {
  const t = createTestDb();
  db = t.db;
  close = t.close;
  app = await buildServer({ db });
  await app.ready();
});
afterEach(async () => {
  await app.close();
  close();
});

describe("health + login", () => {
  it("GET /health is open", async () => {
    const res = await app.inject({ method: "GET", url: "/health" });
    expect(res.statusCode).toBe(200);
    expect(res.json()).toEqual({ status: "ok" });
  });

  it("login with bad credentials is rejected", async () => {
    await seedUser(db, { username: "alice", password: "right-password" });
    const res = await app.inject({ method: "POST", url: "/api/auth/login", payload: { username: "alice", password: "wrong" } });
    expect(res.statusCode).toBeGreaterThanOrEqual(400);
  });

  it("login with good credentials sets auth + csrf cookies", async () => {
    await seedUser(db, { username: "alice", password: "right-password" });
    const res = await app.inject({ method: "POST", url: "/api/auth/login", payload: { username: "alice", password: "right-password" } });
    expect(res.statusCode).toBe(200);
    const names = res.cookies.map((c) => c.name);
    expect(names).toContain("parking_token");
    expect(names).toContain("parking_csrf");
  });
});

describe("auth guard — no token", () => {
  it("GET /api/occupancy without a session is 401", async () => {
    const res = await app.inject({ method: "GET", url: "/api/occupancy" });
    expect(res.statusCode).toBe(401);
  });
});

describe("RBAC permission gate", () => {
  it("a site:read-only user can GET occupancy but is 403 on PUT site-config", async () => {
    const { username, password } = await seedUser(db, {
      username: "viewer", roleId: "viewer", permissions: ["site:read"],
    });
    const { cookie, csrf } = await login(app, username, password);

    // GET allowed (site:read).
    const get = await app.inject({ method: "GET", url: "/api/occupancy", headers: { cookie } });
    expect(get.statusCode).toBe(200);

    // PUT requires site:update — which this role lacks → 403 (with valid CSRF, so the
    // 403 is the PERMISSION check, not CSRF).
    const put = await app.inject({
      method: "PUT", url: "/api/site-config",
      headers: { cookie, "x-csrf-token": csrf },
      payload: { capacity: 50 },
    });
    expect(put.statusCode).toBe(403);
  });

  it("an admin user passes the same PUT", async () => {
    const { username, password } = await seedUser(db, { username: "boss", roleId: "admin" });
    const { cookie, csrf } = await login(app, username, password);
    const put = await app.inject({
      method: "PUT", url: "/api/site-config",
      headers: { cookie, "x-csrf-token": csrf },
      payload: { capacity: 50 },
    });
    expect(put.statusCode).toBeLessThan(300);
  });
});

describe("CSRF double-submit on mutations", () => {
  it("a mutation with the auth cookie but NO csrf header is 403", async () => {
    const { username, password } = await seedUser(db, { username: "boss", roleId: "admin" });
    const { cookie } = await login(app, username, password);
    const put = await app.inject({
      method: "PUT", url: "/api/site-config",
      headers: { cookie }, // csrf header deliberately omitted
      payload: { capacity: 50 },
    });
    expect(put.statusCode).toBe(403);
  });
});

describe("drawer balance (the till NOW)", () => {
  it("shift:read gets the balance; a role without it is 403; no auth 401", async () => {
    const anon = await app.inject({ method: "GET", url: "/api/drawer/balance" });
    expect(anon.statusCode).toBe(401);

    const viewer = await seedUser(db, { username: "till", roleId: "till", permissions: ["shift:read"] });
    const { cookie } = await login(app, viewer.username, viewer.password);
    const ok = await app.inject({ method: "GET", url: "/api/drawer/balance", headers: { cookie } });
    expect(ok.statusCode).toBe(200);
    expect(ok.json()).toEqual({ balanceMinor: 0, currency: null });

    const outsider = await seedUser(db, { username: "noshift", roleId: "noshift", permissions: ["site:read"] });
    const other = await login(app, outsider.username, outsider.password);
    const denied = await app.inject({ method: "GET", url: "/api/drawer/balance", headers: { cookie: other.cookie } });
    expect(denied.statusCode).toBe(403);
  });
});