/**
 * WalkGuide — Synthetic Test Data Generator
 * Menghasilkan data dummy yang realistis untuk semua skenario load test.
 */
import { uuidv4 } from "https://jslib.k6.io/k6-utils/1.4.0/index.js";

// ── Alphabet untuk uniqueUserId (12 char alphanumeric) ──────────────────────
const ALPHANUM =
  "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

function randomString(len, chars = ALPHANUM) {
  let out = "";
  for (let i = 0; i < len; i++) {
    out += chars[Math.floor(Math.random() * chars.length)];
  }
  return out;
}

function randomInt(min, max) {
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

function randomFloat(min, max, decimals = 6) {
  return parseFloat((Math.random() * (max - min) + min).toFixed(decimals));
}

function randomElement(arr) {
  return arr[Math.floor(Math.random() * arr.length)];
}

// ── Koordinat realistis: sekitar Surabaya ───────────────────────────────────
const SURABAYA_CENTER = { lat: -7.2575, lng: 112.7521 };

export function randomSurabayaCoord(radiusDegrees = 0.05) {
  return {
    lat: SURABAYA_CENTER.lat + randomFloat(-radiusDegrees, radiusDegrees),
    lng: SURABAYA_CENTER.lng + randomFloat(-radiusDegrees, radiusDegrees),
  };
}

// ── User / Guardian data ─────────────────────────────────────────────────────

/**
 * Generate payload untuk register GUARDIAN
 */
export function guardianRegisterPayload(suffix = "") {
  const uid = suffix || randomString(8);
  return {
    email: `guardian_${uid}@walkguide-test.com`,
    password: `Pass@${randomString(6)}!`,
    displayName: `Guardian ${uid}`,
    role: "ROLE_GUARDIAN",
  };
}

/**
 * Generate payload untuk register USER (tunanetra)
 */
export function userRegisterPayload(suffix = "") {
  const uid = suffix || randomString(8);
  return {
    email: `user_${uid}@walkguide-test.com`,
    password: `Pass@${randomString(6)}!`,
    displayName: `User ${uid}`,
    role: "ROLE_USER",
  };
}

// ── Location data ────────────────────────────────────────────────────────────

const DIRECTION_LABELS = [
  "NORTH",
  "NORTHEAST",
  "EAST",
  "SOUTHEAST",
  "SOUTH",
  "SOUTHWEST",
  "WEST",
  "NORTHWEST",
];

/**
 * Generate satu location update payload (simulasi GPS setiap 5 detik)
 */
export function locationUpdatePayload(
  baseLat = SURABAYA_CENTER.lat,
  baseLng = SURABAYA_CENTER.lng,
) {
  return {
    lat: baseLat + randomFloat(-0.001, 0.001),
    lng: baseLng + randomFloat(-0.001, 0.001),
    accuracy: randomFloat(3.0, 15.0, 1),
    speed: randomFloat(0.5, 2.5, 2), // walking speed m/s
    heading: randomFloat(0.0, 359.9, 1),
  };
}

/**
 * Generate array of location updates (simulasi walking path)
 */
export function walkingPath(
  steps = 10,
  startLat = SURABAYA_CENTER.lat,
  startLng = SURABAYA_CENTER.lng,
) {
  const path = [];
  let lat = startLat,
    lng = startLng;
  for (let i = 0; i < steps; i++) {
    lat += randomFloat(-0.0002, 0.0002);
    lng += randomFloat(-0.0002, 0.0002);
    path.push({
      lat,
      lng,
      accuracy: randomFloat(3, 10, 1),
      speed: randomFloat(0.8, 1.8, 2),
      heading: randomFloat(0, 360, 1),
    });
  }
  return path;
}

// ── Obstacle data ────────────────────────────────────────────────────────────

const YOLO_LABELS = [
  "person",
  "car",
  "motorcycle",
  "bicycle",
  "truck",
  "bus",
  "traffic light",
  "stop sign",
  "bench",
  "chair",
  "potted plant",
  "fire hydrant",
  "parking meter",
  "dog",
  "cat",
  "suitcase",
];

const OBSTACLE_DIRECTIONS = ["LEFT", "CENTER", "RIGHT"];
const OBSTACLE_DISTANCES = ["Very Close", "Close", "Medium", "Far"];

/**
 * Generate satu obstacle log payload (output YOLO detection)
 */
export function obstacleLogPayload() {
  const coord = randomSurabayaCoord(0.02);
  return {
    label: randomElement(YOLO_LABELS),
    confidence: randomFloat(0.5, 0.99, 4),
    direction: randomElement(OBSTACLE_DIRECTIONS),
    estimatedDist: randomElement(OBSTACLE_DISTANCES),
    lat: coord.lat,
    lng: coord.lng,
  };
}

/**
 * Generate burst obstacle logs (simulasi: 5 FPS deteksi selama beberapa detik)
 */
export function obstacleLogBurst(count = 5) {
  return Array.from({ length: count }, () => obstacleLogPayload());
}

// ── SOS data ─────────────────────────────────────────────────────────────────

const SOS_TRIGGER_TYPES = ["VOICE_COMMAND", "BUTTON", "MANUAL"];

export function sosPayload() {
  const coord = randomSurabayaCoord(0.03);
  return {
    triggerType: randomElement(SOS_TRIGGER_TYPES),
    lat: coord.lat,
    lng: coord.lng,
  };
}

// ── Notification data ─────────────────────────────────────────────────────────

const NOTIFICATION_MESSAGES = [
  "Hati-hati ada kendaraan di depan!",
  "Sudah sampai tujuan belum?",
  "Minta kabar, kamu baik-baik saja?",
  "Ada yang bisa dibantu?",
  "Jangan lupa berhati-hati di jalan.",
  "Aku pantau dari sini ya.",
  "Sudah mau hujan, cari tempat teduh.",
  "Ada mobil di sebelah kanan!",
  "Tolong berhenti dulu.",
  "Aman ya? Jawab kalau dengar.",
];

export function sendNotificationPayload() {
  return {
    notifType: "TEXT",
    content: randomElement(NOTIFICATION_MESSAGES),
  };
}

// ── AI Config data ────────────────────────────────────────────────────────────

export function aiConfigPayload() {
  return {
    confidenceThreshold: randomFloat(0.3, 0.8, 2),
    alertDistanceClose: randomFloat(1.0, 2.5, 1),
    alertDistanceMedium: randomFloat(2.5, 5.0, 1),
    maxInferenceFps: randomInt(3, 10),
    enabledLabels: "ALL",
  };
}

// ── User Settings data ────────────────────────────────────────────────────────

export function userSettingsPayload() {
  return {
    ttsLanguage: randomElement(["id-ID", "en-US"]),
    ttsPitch: randomFloat(0.8, 1.5, 1),
    ttsSpeed: randomFloat(0.7, 1.3, 1),
    warnNoGuardian: true,
    hapticEnabled: true,
  };
}

// ── Geofence Config data ──────────────────────────────────────────────────────

export function geofenceConfigPayload() {
  const coord = randomSurabayaCoord(0.01);
  return {
    centerLat: coord.lat,
    centerLng: coord.lng,
    radiusMeters: randomFloat(200, 1000, 0),
    enabled: true,
  };
}

// ── Unique user id (mirror dari backend logic) ───────────────────────────────

export function fakeUniqueUserId() {
  return randomString(12);
}

// ── Generic helpers ───────────────────────────────────────────────────────────

export const testData = {
  guardianRegisterPayload,
  userRegisterPayload,
  locationUpdatePayload,
  walkingPath,
  obstacleLogPayload,
  obstacleLogBurst,
  sosPayload,
  sendNotificationPayload,
  aiConfigPayload,
  userSettingsPayload,
  geofenceConfigPayload,
  fakeUniqueUserId,
  randomSurabayaCoord,
  randomElement,
  randomInt,
  randomFloat,
};