/**
 * SCENARIO: sos-flow.js
 * SOS trigger → Guardian acknowledge → Status resolution
 *
 * SOS adalah fitur PALING KRITIS di WalkGuide — life-safety feature.
 * Harus memiliki latency terendah di seluruh sistem.
 *
 * Target: p95 < 200ms, error rate = 0% (zero tolerance)
 */
import { sleep, check } from "k6";
import {
  DEFAULT_THRESHOLDS,
  handleSummary,
} from "../modules/metrics-helper.js";
import * as api from "../modules/api-client.js";
import { testData } from "../modules/test-data.js";

export const options = {
  scenarios: {
    sos_critical: {
      executor: "ramping-vus",
      startVUs: 0,
      stages: [
        { duration: "15s", target: 5 },
        { duration: "60s", target: 20 },
        { duration: "60s", target: 20 },
        { duration: "15s", target: 0 },
      ],
      gracefulRampDown: "10s",
    },
  },
  thresholds: {
    ...DEFAULT_THRESHOLDS,
    // SOS: zero error tolerance, ultra-low latency
    walkguide_sos_latency_ms: ["p(95)<200", "p(99)<400", "max<800"],
    walkguide_error_rate: ["rate<0.005"], // < 0.5% error untuk SOS
    http_req_failed: ["rate<0.005"],
  },
};

// ── Per-VU state ──────────────────────────────────────────────────────────────
let userToken = null;
let guardianToken = null;

export default function sosFlow() {
  // ── Init: setup user + guardian pair ──────────────────────────────────────
  if (!userToken || !guardianToken) {
    const suffix = `sos_${__VU}_${Date.now()}`;

    // Register user
    const uRes = api.register(testData.userRegisterPayload(suffix));
    if (uRes.status === 200) {
      const b = api.parseBody(uRes);
      if (b && b.data) userToken = b.data.accessToken;
    }

    // Register guardian
    const gRes = api.register(testData.guardianRegisterPayload(suffix));
    if (gRes.status === 200) {
      const b = api.parseBody(gRes);
      if (b && b.data) guardianToken = b.data.accessToken;
    }

    if (!userToken || !guardianToken) {
      console.error(`[sos-flow] VU ${__VU} failed to get tokens`);
      sleep(2);
      return;
    }

    sleep(0.5);
  }

  // ── Step 1: User trigger SOS ───────────────────────────────────────────────
  const sosTriggerTypes = ["VOICE_COMMAND", "BUTTON", "MANUAL"];
  const triggerType = sosTriggerTypes[__ITER % 3];
  const coord = testData.randomSurabayaCoord(0.03);

  const startTs = Date.now();
  const sosRes = api.triggerSos(userToken, triggerType, coord.lat, coord.lng);
  const triggerMs = Date.now() - startTs;

  const sosOk = check(sosRes, {
    "sos-trigger: status 2xx": (r) => r.status >= 200 && r.status < 300,
    "sos-trigger: latency < 200ms": (r) => r.timings.duration < 200,
    "sos-trigger: has sosId": (r) => {
      const b = api.parseBody(r);
      return b && b.data && b.data.id !== undefined;
    },
    "sos-trigger: status TRIGGERED": (r) => {
      const b = api.parseBody(r);
      return b && b.data && b.data.status === "TRIGGERED";
    },
  });

  let sosId = null;
  if (sosRes.status >= 200 && sosRes.status < 300) {
    const body = api.parseBody(sosRes);
    sosId = body && body.data ? body.data.id : null;
  }

  if (!sosOk) {
    console.warn(
      `[sos-flow] SOS trigger not OK for VU ${__VU}, trigger latency: ${triggerMs}ms`,
    );
  }

  sleep(0.2);

  // ── Step 2: Guardian poll SOS events ──────────────────────────────────────
  const sosListRes = api.getSosEvents(guardianToken);
  check(sosListRes, {
    "guardian-sos-list: 2xx": (r) => r.status >= 200 && r.status < 300,
  });

  sleep(0.3);

  // ── Step 3: Guardian acknowledge SOS ──────────────────────────────────────
  if (sosId) {
    const ackRes = api.acknowledgeSos(guardianToken, sosId);
    check(ackRes, {
      "sos-acknowledge: 2xx": (r) => r.status >= 200 && r.status < 300,
      "sos-acknowledge: status ACKNOWLEDGED": (r) => {
        const b = api.parseBody(r);
        return b && b.data && b.data.status === "ACKNOWLEDGED";
      },
    });
  }

  sleep(0.5);

  // ── Step 4: User check activity logs (SOS harus ter-log) ──────────────────
  const logsRes = api.getActivityLogs(userToken, 0, 5);
  check(logsRes, {
    "activity-logs: 2xx": (r) => r.status >= 200 && r.status < 300,
  });

  // ── Think time antar SOS (SOS tidak terjadi setiap detik di production) ────
  sleep(testData.randomFloat(1.0, 3.0, 1));
}

export function setup() {
  const res = api.ping();
  if (res.status !== 200)
    throw new Error(`Backend not reachable: ${res.status}`);
  console.log("🚨 SOS flow test starting — Zero error tolerance mode.");
}

export { handleSummary };