import { afterEach, describe, expect, it } from "vitest";
import type { FastifyInstance } from "fastify";
import { buildApp } from "../src/app.js";
import type { AppConfig } from "../src/config.js";
import { CSRF_COOKIE, SESSION_COOKIE } from "../src/security.js";

const apps: FastifyInstance[] = [];

function testConfig(): AppConfig {
  return {
    nodeEnv: "test",
    host: "127.0.0.1",
    port: 8787,
    databasePath: ":memory:",
    sessionTtlMs: 60_000,
    cookieSecure: false,
    allowedOrigins: new Set(["http://mg4pi.local:8787"]),
    updateStatusPath: `/tmp/pi-car-companion-test-${process.pid}-missing-update.json`,
    versionFile: `/tmp/pi-car-companion-test-${process.pid}-missing-revision`,
    network: {
      enabled: false,
      statusPath: `/tmp/pi-car-companion-test-${process.pid}-missing-network-status.json`,
      commandPath: `/tmp/pi-car-companion-test-${process.pid}-network-command.json`,
      configurationRequestPath: `/tmp/pi-car-companion-test-${process.pid}-network-configuration.json`
    },
    adb: { enabled: false, executable: "adb", serial: null, timeoutMs: 3_000 }
  };
}

async function createApp(): Promise<FastifyInstance> {
  const app = await buildApp(testConfig());
  apps.push(app);
  return app;
}

async function csrf(app: FastifyInstance): Promise<string> {
  const response = await app.inject({ method: "GET", url: "/api/auth/state" });
  expect(response.statusCode).toBe(200);
  return response.json<{ csrfToken: string }>().csrfToken;
}

function mutationHeaders(token: string) {
  return {
    cookie: `${CSRF_COOKIE}=${token}`,
    "x-csrf-token": token,
    origin: "http://mg4pi.local:8787"
  };
}

async function setup(app: FastifyInstance, token: string) {
  return app.inject({
    method: "POST",
    url: "/api/auth/setup",
    headers: mutationHeaders(token),
    payload: { username: "owner", password: "Correct-horse1" }
  });
}

afterEach(async () => {
  await Promise.all(apps.splice(0).map((app) => app.close()));
});

describe("authentication boundary", () => {
  it("creates exactly one initial administrator", async () => {
    const app = await createApp();
    const token = await csrf(app);

    expect((await setup(app, token)).statusCode).toBe(201);
    const second = await app.inject({
      method: "POST",
      url: "/api/auth/setup",
      headers: mutationHeaders(token),
      payload: { username: "second", password: "Another-pass2" }
    });

    expect(second.statusCode).toBe(409);
    expect(second.json()).toMatchObject({ error: { code: "SETUP_COMPLETE" } });
  });

  it("requires 8 characters, an uppercase letter, and a number for setup", async () => {
    const app = await createApp();
    const token = await csrf(app);
    const cases = [
      { password: "Short1", expectedMessage: "at least 8 characters" },
      { password: "lowercase1", expectedMessage: "uppercase letter" },
      { password: "NoNumberHere", expectedMessage: "one number" }
    ];

    for (const testCase of cases) {
      const response = await app.inject({
        method: "POST",
        url: "/api/auth/setup",
        headers: mutationHeaders(token),
        payload: { username: "owner", password: testCase.password }
      });
      expect(response.statusCode).toBe(400);
      expect(response.json<{ error: { message: string } }>().error.message).toContain(testCase.expectedMessage);
    }
  });

  it("rejects state changes without a matching CSRF token", async () => {
    const app = await createApp();
    const response = await app.inject({
      method: "POST",
      url: "/api/auth/setup",
      payload: { username: "owner", password: "Correct-horse1" }
    });

    expect(response.statusCode).toBe(403);
    expect(response.json()).toMatchObject({ error: { code: "CSRF_REJECTED" } });
  });

  it("rejects an untrusted browser origin", async () => {
    const app = await createApp();
    const token = await csrf(app);
    const response = await app.inject({
      method: "POST",
      url: "/api/auth/setup",
      headers: { ...mutationHeaders(token), origin: "https://attacker.example" },
      payload: { username: "owner", password: "Correct-horse1" }
    });

    expect(response.statusCode).toBe(403);
    expect(response.json()).toMatchObject({ error: { code: "ORIGIN_REJECTED" } });
  });

  it("accepts a same-host origin for dynamic LAN addresses", async () => {
    const app = await createApp();
    const token = await csrf(app);
    const response = await app.inject({
      method: "POST",
      url: "/api/auth/setup",
      headers: {
        ...mutationHeaders(token),
        host: "192.168.4.20:8787",
        origin: "http://192.168.4.20:8787"
      },
      payload: { username: "owner", password: "Correct-horse1" }
    });

    expect(response.statusCode).toBe(201);
  });

  it("requires a valid session for system status", async () => {
    const app = await createApp();
    expect((await app.inject({ method: "GET", url: "/api/status" })).statusCode).toBe(401);

    const token = await csrf(app);
    await setup(app, token);
    const login = await app.inject({
      method: "POST",
      url: "/api/auth/login",
      headers: mutationHeaders(token),
      payload: { username: "owner", password: "Correct-horse1" }
    });
    expect(login.statusCode).toBe(200);
    const sessionCookie = login.cookies.find((cookie) => cookie.name === SESSION_COOKIE);
    expect(sessionCookie).toBeDefined();

    const status = await app.inject({
      method: "GET",
      url: "/api/status",
      headers: { cookie: `${SESSION_COOKIE}=${sessionCookie?.value ?? ""}` }
    });
    expect(status.statusCode, status.body).toBe(200);
    expect(status.json()).toMatchObject({
      service: { state: "healthy" },
      headUnit: { available: false, state: "disabled" }
    });

    const update = await app.inject({
      method: "POST",
      url: "/api/system/update",
      headers: {
        ...mutationHeaders(token),
        cookie: `${CSRF_COOKIE}=${token}; ${SESSION_COOKIE}=${sessionCookie?.value ?? ""}`
      }
    });
    expect(update.statusCode).toBe(503);
    expect(update.json()).toMatchObject({ error: { code: "UPDATES_UNAVAILABLE" } });
  });

  it("does not expose update state without authentication", async () => {
    const app = await createApp();
    const response = await app.inject({ method: "GET", url: "/api/system/update" });
    expect(response.statusCode).toBe(401);
  });

  it("keeps network status and controls behind authentication and explicit configuration", async () => {
    const app = await createApp();
    expect((await app.inject({ method: "GET", url: "/api/network" })).statusCode).toBe(401);

    const token = await csrf(app);
    await setup(app, token);
    const login = await app.inject({
      method: "POST",
      url: "/api/auth/login",
      headers: mutationHeaders(token),
      payload: { username: "owner", password: "Correct-horse1" }
    });
    const session = login.cookies.find((item) => item.name === SESSION_COOKIE)?.value ?? "";
    const cookie = `${CSRF_COOKIE}=${token}; ${SESSION_COOKIE}=${session}`;
    const status = await app.inject({ method: "GET", url: "/api/network", headers: { cookie } });
    expect(status.statusCode).toBe(200);
    expect(status.json()).toMatchObject({ supported: false, enabled: false, mode: "disabled" });

    const action = await app.inject({
      method: "POST",
      url: "/api/network/actions",
      headers: { ...mutationHeaders(token), cookie },
      payload: { action: "retry-upstream" }
    });
    expect(action.statusCode).toBe(503);

    const invalidConfiguration = await app.inject({
      method: "POST",
      url: "/api/network/configuration",
      headers: { ...mutationHeaders(token), cookie },
      payload: { ssid: "bad/name", password: "short" }
    });
    expect(invalidConfiguration.statusCode).toBe(400);
    expect(invalidConfiguration.json()).toMatchObject({ error: { code: "INVALID_HOTSPOT_CONFIGURATION" } });
  });

  it("exposes only allowlisted jobs and authenticated run history", async () => {
    const app = await createApp();
    const token = await csrf(app);
    await setup(app, token);
    const login = await app.inject({
      method: "POST",
      url: "/api/auth/login",
      headers: mutationHeaders(token),
      payload: { username: "owner", password: "Correct-horse1" }
    });
    const session = login.cookies.find((item) => item.name === SESSION_COOKIE)?.value ?? "";
    const cookie = `${CSRF_COOKIE}=${token}; ${SESSION_COOKIE}=${session}`;

    expect((await app.inject({ method: "GET", url: "/api/jobs" })).statusCode).toBe(401);
    const jobs = await app.inject({ method: "GET", url: "/api/jobs", headers: { cookie } });
    expect(jobs.statusCode).toBe(200);
    expect(jobs.json<{ jobs: { id: string }[] }>().jobs.map((job) => job.id)).toEqual([
      "refresh-health",
      "network-diagnostics",
      "support-bundle"
    ]);

    const unknown = await app.inject({
      method: "POST",
      url: "/api/jobs/arbitrary-shell/runs",
      headers: { ...mutationHeaders(token), cookie }
    });
    expect(unknown.statusCode).toBe(404);
    expect(unknown.json()).toMatchObject({ error: { code: "JOB_NOT_FOUND" } });

    const queued = await app.inject({
      method: "POST",
      url: "/api/jobs/refresh-health/runs",
      headers: { ...mutationHeaders(token), cookie }
    });
    expect(queued.statusCode).toBe(202);
    const runId = queued.json<{ id: string }>().id;
    let run: { status: string } = { status: "queued" };
    for (let attempt = 0; attempt < 50 && ["queued", "running"].includes(run.status); attempt += 1) {
      await new Promise((resolve) => setTimeout(resolve, 2));
      const response = await app.inject({ method: "GET", url: `/api/job-runs/${runId}`, headers: { cookie } });
      expect(response.statusCode).toBe(200);
      run = response.json<{ status: string }>();
    }
    expect(run.status).toBe("succeeded");
  });
});