"use strict";

const test = require("node:test");
const assert = require("node:assert/strict");
const { buildApp } = require("../src/app");
const { hmacSHA256Hex } = require("../src/lib/signature");

function createApp(options = {}) {
  const baseConfig = {
    xWebhookSecret: "x-secret",
    polarWebhookSecret: "polar-secret",
    xBearerToken: "",
    xBotUserId: "",
    polarAccessToken: "",
    polarServer: "production",
    polarProductIds: [],
    appBaseUrl: "http://localhost:3000",
    ttsApiKey: "",
    ttsBaseUrl: "",
    ttsModel: "gpt-4o-mini-tts",
    ttsVoice: "alloy",
    s3Bucket: "",
    s3Region: "",
    s3Endpoint: "",
    s3AccessKeyId: "",
    s3SecretAccessKey: "",
    s3SignedUrlTtlSec: 3600,
    rateLimits: {
      webhookPerMinute: 120,
      authPerMinute: 30,
      actionPerMinute: 60,
    },
    credit: {
      baseCredits: 1,
      includedChars: 25000,
      stepChars: 10000,
      stepCredits: 1,
      maxCharsPerArticle: 120000,
    },
  };

  const overrideConfig = options.config || {};
  const mergedConfig = {
    ...baseConfig,
    ...overrideConfig,
    rateLimits: {
      ...baseConfig.rateLimits,
      ...(overrideConfig.rateLimits || {}),
    },
    credit: {
      ...baseConfig.credit,
      ...(overrideConfig.credit || {}),
    },
  };

  const appOptions = { ...options };
  delete appOptions.config;

  return buildApp({
    config: mergedConfig,
    ...appOptions,
  });
}

async function call(app, { method, path, headers = {}, body = "", query = {} }) {
  return app.handleRequest({
    method,
    path,
    headers,
    rawBody: body,
    query,
  });
}

async function postJSONWebhook(app, path, payload, secret, extraHeaders) {
  const rawBody = JSON.stringify(payload);
  const sig = hmacSHA256Hex(rawBody, secret);

  return call(app, {
    method: "POST",
    path,
    headers: { "x-signature": `sha256=${sig}`, ...(extraHeaders || {}) },
    body: rawBody,
  });
}

test("GET / renders landing page", async () => {
  const app = createApp();
  const response = await call(app, { method: "GET", path: "/" });
  assert.equal(response.status, 200);
  assert.match(response.body, /From X Article to audiobook in one mention/);
});

test("GET /assets/styles.css serves compiled stylesheet", async () => {
  const app = createApp();
  const response = await call(app, { method: "GET", path: "/assets/styles.css" });
  assert.equal(response.status, 200);
  assert.match(response.headers["content-type"], /text\/css/);
  assert.match(response.body, /\.btn/);
});

test("unauthenticated /app redirects to /login with returnTo", async () => {
  const app = createApp();
  const response = await call(app, { method: "GET", path: "/app" });
  assert.equal(response.status, 303);
  assert.match(response.headers.location, /^\/login\?/);
  assert.match(response.headers.location, /returnTo=%2Fapp/);
});

test("POST /auth/dev-login sets cookie and redirects", async () => {
  const app = createApp();
  const response = await call(app, {
    method: "POST",
    path: "/auth/dev-login",
    body: "userId=matiss&returnTo=%2Fapp",
  });

  assert.equal(response.status, 303);
  assert.equal(response.headers.location, "/app");
  assert.match(response.headers["set-cookie"], /^xartaudio_user=matiss/);
});

test("authenticated dashboard topup + simulate mention flow", async () => {
  const app = createApp();
  const cookieHeader = "xartaudio_user=alice";

  const topup = await call(app, {
    method: "POST",
    path: "/app/actions/topup",
    headers: { cookie: cookieHeader },
    body: "amount=8",
  });
  assert.equal(topup.status, 303);
  assert.match(topup.headers.location, /Added%208%20credits/);

  const simulate = await call(app, {
    method: "POST",
    path: "/app/actions/simulate-mention",
    headers: { cookie: cookieHeader },
    body: "title=Hello&body=This+is+the+article+body",
  });
  assert.equal(simulate.status, 303);
  assert.match(simulate.headers.location, /^\/audio\//);

  const dashboard = await call(app, {
    method: "GET",
    path: "/app",
    headers: { cookie: cookieHeader },
  });
  assert.equal(dashboard.status, 200);
  assert.match(dashboard.body, /Recent audiobooks/);
  assert.match(dashboard.body, /Hello/);
});

test("audio flow requires auth for unlock and supports permanent unlock", async () => {
  const app = createApp();

  await call(app, {
    method: "POST",
    path: "/app/actions/topup",
    headers: { cookie: "xartaudio_user=owner" },
    body: "amount=5",
  });
  await call(app, {
    method: "POST",
    path: "/app/actions/topup",
    headers: { cookie: "xartaudio_user=viewer" },
    body: "amount=5",
  });

  const generated = await call(app, {
    method: "POST",
    path: "/app/actions/simulate-mention",
    headers: { cookie: "xartaudio_user=owner" },
    body: "title=Owned+Audio&body=Body",
  });

  const audioPath = generated.headers.location.split("?")[0];
  const assetId = audioPath.replace("/audio/", "");

  const beforeUnlock = await call(app, {
    method: "GET",
    path: audioPath,
    headers: { cookie: "xartaudio_user=viewer" },
  });
  assert.match(beforeUnlock.body, /Unlock required: 1 credits/);

  const unlock = await call(app, {
    method: "POST",
    path: `/audio/${assetId}/unlock`,
    headers: { cookie: "xartaudio_user=viewer" },
  });
  assert.equal(unlock.status, 303);

  const afterUnlock = await call(app, {
    method: "GET",
    path: audioPath,
    headers: { cookie: "xartaudio_user=viewer" },
  });
  assert.match(afterUnlock.body, /Access granted/);

  const wallet = await call(app, {
    method: "GET",
    path: "/api/me/wallet",
    headers: { cookie: "xartaudio_user=viewer" },
  });
  const walletData = JSON.parse(wallet.body);
  assert.equal(walletData.balance, 4);
});

test("audio page uses signed storage URL when storage adapter is configured", async () => {
  const app = createApp({
    storageAdapter: {
      isConfigured() {
        return true;
      },
      async getSignedDownloadUrl(key) {
        return `https://signed.local/${key}`;
      },
      async uploadAudio() {},
    },
  });

  await call(app, {
    method: "POST",
    path: "/app/actions/topup",
    headers: { cookie: "xartaudio_user=owner" },
    body: "amount=2",
  });

  const generated = await call(app, {
    method: "POST",
    path: "/app/actions/simulate-mention",
    headers: { cookie: "xartaudio_user=owner" },
    body: "title=Signed&body=Audio+Body",
  });

  const audioPath = generated.headers.location.split("?")[0];
  const page = await call(app, {
    method: "GET",
    path: audioPath,
    headers: { cookie: "xartaudio_user=owner" },
  });

  assert.match(page.body, /https:\/\/signed\.local\/audio\/1\.mp3/);
});

test("/api/x/mentions returns upstream mentions when configured", async () => {
  const app = createApp({
    xAdapter: {
      isConfigured() {
        return true;
      },
      async listMentions({ sinceId }) {
        return [{ id: "m1", sinceId: sinceId || null }];
      },
    },
  });

  const response = await call(app, {
    method: "GET",
    path: "/api/x/mentions",
    query: { sinceId: "100" },
  });

  assert.equal(response.status, 200);
  const body = JSON.parse(response.body);
  assert.equal(body.mentions.length, 1);
  assert.equal(body.mentions[0].id, "m1");
});

test("simulate mention schedules background audio generation when service is configured", async () => {
  const queued = [];
  const app = createApp({
    audioGenerationService: {
      isConfigured() {
        return true;
      },
      async enqueueJob(payload) {
        queued.push(payload);
      },
    },
  });

  await call(app, {
    method: "POST",
    path: "/app/actions/topup",
    headers: { cookie: "xartaudio_user=alice" },
    body: "amount=3",
  });

  const simulate = await call(app, {
    method: "POST",
    path: "/app/actions/simulate-mention",
    headers: { cookie: "xartaudio_user=alice" },
    body: "title=T&body=hello+world",
  });

  assert.equal(simulate.status, 303);
  assert.equal(queued.length, 1);
  assert.equal(typeof queued[0].assetId, "string");
  assert.equal(queued[0].text, "hello world");
});

test("/api/payments/create-checkout returns 503 when Polar is not configured", async () => {
  const app = createApp();

  const response = await call(app, {
    method: "POST",
    path: "/api/payments/create-checkout",
    headers: { cookie: "xartaudio_user=viewer" },
  });

  assert.equal(response.status, 503);
  assert.equal(JSON.parse(response.body).error, "polar_checkout_not_configured");
});

test("/api/payments/create-checkout returns checkout URL when adapter is configured", async () => {
  const app = createApp({
    polarAdapter: {
      isConfigured() {
        return true;
      },
      async createCheckoutSession() {
        return { id: "chk_1", url: "https://polar.sh/checkout/chk_1" };
      },
      parseWebhookEvent() {
        return null;
      },
      extractTopUp(payload) {
        return payload;
      },
    },
  });

  const response = await call(app, {
    method: "POST",
    path: "/api/payments/create-checkout",
    headers: { cookie: "xartaudio_user=buyer" },
  });

  assert.equal(response.status, 200);
  const body = JSON.parse(response.body);
  assert.equal(body.checkoutId, "chk_1");
  assert.equal(body.checkoutUrl, "https://polar.sh/checkout/chk_1");
});

test("X webhook invalid signature is rejected", async () => {
  const app = createApp();
  const response = await call(app, {
    method: "POST",
    path: "/api/webhooks/x",
    headers: { "x-signature": "sha256=deadbeef" },
    body: JSON.stringify({ mentionPostId: "m1", callerUserId: "u1", parentPost: {} }),
  });

  assert.equal(response.status, 401);
});

test("X webhook valid flow processes article", async () => {
  const app = createApp();

  await postJSONWebhook(app, "/api/webhooks/polar", { userId: "u1", credits: 4, eventId: "evt1" }, "polar-secret");
  const response = await postJSONWebhook(
    app,
    "/api/webhooks/x",
    {
      mentionPostId: "m2",
      callerUserId: "u1",
      parentPost: {
        id: "p2",
        article: { id: "a2", title: "T", body: "Hello" },
      },
    },
    "x-secret",
  );

  assert.equal(response.status, 200);
  const body = JSON.parse(response.body);
  assert.equal(body.status, "completed");
  assert.equal(body.creditsCharged, 1);
});

test("Polar webhook uses adapter parsing for standard webhook headers", async () => {
  const app = createApp({
    polarAdapter: {
      isConfigured() {
        return false;
      },
      async createCheckoutSession() {
        return null;
      },
      parseWebhookEvent() {
        return {
          type: "order.paid",
          data: {
            id: "ord_1",
            metadata: { xartaudio_user_id: "u9", xartaudio_credits: "7" },
          },
        };
      },
      extractTopUp(event) {
        return {
          userId: event.data.metadata.xartaudio_user_id,
          credits: Number.parseInt(event.data.metadata.xartaudio_credits, 10),
          eventId: event.data.id,
        };
      },
    },
  });

  const response = await call(app, {
    method: "POST",
    path: "/api/webhooks/polar",
    headers: {
      "webhook-id": "wh_1",
      "webhook-timestamp": "1",
      "webhook-signature": "sig",
    },
    body: "{\"type\":\"order.paid\"}",
  });

  assert.equal(response.status, 200);
  const wallet = await call(app, {
    method: "GET",
    path: "/api/me/wallet",
    headers: { cookie: "xartaudio_user=u9" },
  });
  assert.equal(JSON.parse(wallet.body).balance, 7);
});

test("emits persistence snapshots on mutating actions", async () => {
  const snapshots = [];
  const app = createApp({
    onMutation(state) {
      snapshots.push(state);
    },
  });

  await call(app, {
    method: "POST",
    path: "/app/actions/topup",
    headers: { cookie: "xartaudio_user=alice" },
    body: "amount=5",
  });

  await call(app, {
    method: "POST",
    path: "/app/actions/simulate-mention",
    headers: { cookie: "xartaudio_user=alice" },
    body: "title=Persisted&body=hello",
  });

  assert.equal(snapshots.length >= 2, true);
  const latest = snapshots[snapshots.length - 1];
  assert.equal(latest.version, 1);
  assert.equal(typeof latest.updatedAt, "string");
  assert.equal(typeof latest.engine, "object");
});

test("can boot app from previously persisted state snapshot", async () => {
  const snapshots = [];
  const app1 = createApp({
    onMutation(state) {
      snapshots.push(state);
    },
  });

  await call(app1, {
    method: "POST",
    path: "/app/actions/topup",
    headers: { cookie: "xartaudio_user=restart-user" },
    body: "amount=6",
  });

  const persistedState = snapshots[snapshots.length - 1];
  const app2 = createApp({
    initialState: persistedState,
  });

  const wallet = await call(app2, {
    method: "GET",
    path: "/api/me/wallet",
    headers: { cookie: "xartaudio_user=restart-user" },
  });

  assert.equal(wallet.status, 200);
  assert.equal(JSON.parse(wallet.body).balance, 6);
});

test("rate limits repeated webhook calls", async () => {
  const app = createApp({
    config: {
      rateLimits: {
        webhookPerMinute: 1,
      },
    },
  });

  const first = await call(app, {
    method: "POST",
    path: "/api/webhooks/x",
    headers: { "x-forwarded-for": "1.2.3.4", "x-signature": "sha256=deadbeef" },
    body: JSON.stringify({}),
  });
  const second = await call(app, {
    method: "POST",
    path: "/api/webhooks/x",
    headers: { "x-forwarded-for": "1.2.3.4", "x-signature": "sha256=deadbeef" },
    body: JSON.stringify({}),
  });

  assert.equal(first.status, 401);
  assert.equal(second.status, 429);
});

test("rate limits repeated login attempts from same IP", async () => {
  const app = createApp({
    config: {
      rateLimits: {
        authPerMinute: 1,
      },
    },
  });

  const first = await call(app, {
    method: "POST",
    path: "/auth/dev-login",
    headers: { "x-forwarded-for": "5.5.5.5" },
    body: "userId=alice&returnTo=%2Fapp",
  });
  const second = await call(app, {
    method: "POST",
    path: "/auth/dev-login",
    headers: { "x-forwarded-for": "5.5.5.5" },
    body: "userId=alice&returnTo=%2Fapp",
  });

  assert.equal(first.status, 303);
  assert.equal(second.status, 303);
  assert.match(second.headers.location, /Too%20many%20requests/);
});