import { describe, it, expect, vi, beforeEach } from "vitest";
import Fastify from "fastify";
import { registerBastionRoutes } from "../src/routes/bastions.js";
import { bastionRegistry } from "../src/services/bastion-registry.js";
import type { DbClient } from "../src/server.js";
import type { BastionState } from "@lab/shared";

function createMockDb(servers: unknown[] = []): DbClient {
  return {
    $queryRaw: vi.fn().mockResolvedValue([{ "?column?": 1 }]),
    server: {
      findMany: vi.fn().mockResolvedValue(servers),
      findUnique: vi.fn().mockResolvedValue(null),
      upsert: vi.fn().mockResolvedValue({}),
    },
    joinToken: {
      findUnique: vi.fn().mockResolvedValue(null),
      findMany: vi.fn().mockResolvedValue([]),
      create: vi.fn().mockResolvedValue({ id: "t" }),
      update: vi.fn().mockResolvedValue({}),
    },
    bastion: {
      upsert: vi.fn().mockResolvedValue({}),
      findMany: vi.fn().mockResolvedValue([]),
      findUnique: vi.fn().mockResolvedValue(null),
      update: vi.fn().mockResolvedValue({}),
    },
  };
}

function registerFakeBastion(bastionId: string, state: BastionState): void {
  bastionRegistry.register({
    bastionId,
    hostname: "fake",
    network: "192.168.8.0/24",
    serverIp: "192.168.8.11",
    // socket is referenced only on commands, not during aggregation
    socket: { on: () => undefined, off: () => undefined, send: () => undefined, close: () => undefined } as never,
    connectedAt: new Date(),
    lastHeartbeat: new Date(),
    state,
  });
}

describe("GET /api/machines aggregation", () => {
  beforeEach(() => {
    for (const b of bastionRegistry.getAll()) bastionRegistry.unregister(b.bastionId);
  });

  it("promotes a live-discovered MAC to installed when the DB has a real hostname+role for it", async () => {
    // Simulates the worker0-k8s0 bug: bastion restarted, lost its installed map,
    // rediscovered the machine via DHCP/PXE. DB still has hostname=worker0-k8s0,
    // role=infra, ip=192.168.8.23. Without the fix, the CLI sees a "discovered"
    // row with no hostname/role/IP. With the fix, the row is promoted to
    // "installed" with full identity preserved.
    const mac = "78:55:36:08:28:fb";
    registerFakeBastion("b1", {
      discovered: {
        [mac]: {
          mac, product: "SER", board: "SER", serial: "x", manufacturer: "AZW",
          cpu_model: "AMD Ryzen 7 255", cpu_cores: 16, memory_gb: 58, arch: "x86_64",
          disks: [], nics: [], first_seen: "", last_seen: "",
        },
      },
      install_queue: {},
      installed: {},
      debug: {},
    });

    const app = Fastify({ logger: false });
    const db = createMockDb([
      { mac, hostname: "worker0-k8s0", role: "infra", ip: "192.168.8.23", status: "discovered", labels: {} },
    ]);
    registerBastionRoutes(app, db);

    const res = await app.inject({ method: "GET", url: "/api/machines" });
    expect(res.statusCode).toBe(200);
    const body = JSON.parse(res.body);

    expect(body.discovered[mac]).toBeUndefined();
    expect(body.installed[mac]).toMatchObject({
      hostname: "worker0-k8s0",
      role: "infra",
      ip: "192.168.8.23",
      cpu_model: "AMD Ryzen 7 255",
      cpu_cores: 16,
      memory_gb: 58,
    });

    await app.close();
  });

  it("leaves a fresh-discovery MAC in discovered when DB only has a discovery-shaped record", async () => {
    const mac = "aa:bb:cc:dd:ee:ff";
    registerFakeBastion("b1", {
      discovered: {
        [mac]: {
          mac, product: "SER", board: "SER", serial: "x", manufacturer: "AZW",
          cpu_model: "AMD Ryzen 7", cpu_cores: 8, memory_gb: 32, arch: "x86_64",
          disks: [], nics: [], first_seen: "", last_seen: "",
        },
      },
      install_queue: {},
      installed: {},
      debug: {},
    });

    const app = Fastify({ logger: false });
    // Matches what labd writes on first discovery: hostname=product, role="unknown"
    const db = createMockDb([
      { mac, hostname: "SER", role: "unknown", ip: null, status: "discovered", labels: {} },
    ]);
    registerBastionRoutes(app, db);

    const res = await app.inject({ method: "GET", url: "/api/machines" });
    const body = JSON.parse(res.body);

    expect(body.discovered[mac]).toBeDefined();
    expect(body.installed[mac]).toBeUndefined();

    await app.close();
  });

  it("falls back to DB for MACs not in any live bucket", async () => {
    const mac = "11:22:33:44:55:66";
    // No bastions connected
    const app = Fastify({ logger: false });
    const db = createMockDb([
      { mac, hostname: "worker1-k8s0", role: "infra", ip: "192.168.8.13", status: "online", labels: {} },
    ]);
    registerBastionRoutes(app, db);

    const res = await app.inject({ method: "GET", url: "/api/machines" });
    const body = JSON.parse(res.body);

    expect(body.installed[mac]).toMatchObject({
      hostname: "worker1-k8s0",
      role: "infra",
      ip: "192.168.8.13",
    });

    await app.close();
  });
});