/* =====================================================================
   avatar-session-speech.spec.ts — P1 세션 TTS 재생 ↔ v3(리노컷) 아바타
   발화 연결 E2E(결정문 §8.5 "세션 연결" 테스트 계약).

   목적: TTS 응답을 테스트 안에서 만든 WAV(유성 구간이 있는 톤버스트
         여러 개)로 모킹해, 재생 중 v3 래퍼의 data-speech-source="audio"·
         data-viseme 순환을 확인하고, 재생이 끝나면 발화 속성이 정리되는지
         본다. TTS 실패(500)면 data-speech-source="text"로 텍스트 타이밍
         발화로 떨어지는지도 본다.

   근거: apps/web/src/pages/Session.tsx playTtsAudio/speakTextClientTurn,
         apps/web/src/components/avatar/v3/ClientAvatarV3.tsx.
   주의: 모든 API는 route fixture로 모킹한다(실제 AI 엔진·TTS 제공자 없음).
         헤드리스 자동재생 정책 때문에 이 파일만 autoplay-policy를 느슨하게
         연다(세션 범위, 다른 스펙에 영향 없음).
   ===================================================================== */

import { expect, test, type Locator, type Page, type Route } from "@playwright/test";

test.use({ launchOptions: { args: ["--autoplay-policy=no-user-gesture-required"] } });

const SESSION_ID = "66666666-6666-4666-8666-666666666666";
const LEARNER_TEXT = "요즘 많이 힘들었어요. 어떤 마음이 가장 크게 남아 있나요?";
const CLIENT_REPLY = "그냥요. 잠을 잘 못 자요. 아무 것도 하고 싶지 않아요.";

function jsonRoute(body: unknown, status = 200) {
  return { status, contentType: "application/json", body: JSON.stringify(body) };
}

function sseTurnBody(tokens: string[], done: Record<string, unknown>): string {
  const lines: string[] = [];
  for (const token of tokens) lines.push("event: token", `data: ${token}`, "");
  lines.push("event: done", `data: ${JSON.stringify(done)}`, "");
  return lines.join("\n");
}

async function fulfillTurn(route: Route, tokens: string[], done: Record<string, unknown>) {
  await route.fulfill({ status: 200, contentType: "text/event-stream", body: sseTurnBody(tokens, done) });
}

function writeAsciiString(view: DataView, offset: number, text: string): void {
  for (let i = 0; i < text.length; i++) view.setUint8(offset + i, text.charCodeAt(i));
}

/**
 * 유성 구간이 있는 톤버스트 여러 개로 테스트용 WAV를 만든다(16비트 PCM 모노).
 * decodeAudioData가 바로 디코드할 수 있다. 무음 구간(0)과 사인파 구간을 번갈아
 * 넣어 speechEnvelope.ts의 유성 구간 검출(포락선 > max(0.02, 0.12·P95))이
 * 서로 다른 구간 여러 개를 집어내게 한다.
 */
function buildToneBurstWav(): Buffer {
  const sampleRate = 16000;
  const amplitude = 0.7;
  const segments: Array<{ freq: number; durMs: number }> = [
    { freq: 0, durMs: 150 },
    { freq: 220, durMs: 320 },
    { freq: 0, durMs: 180 },
    { freq: 420, durMs: 280 },
    { freq: 0, durMs: 180 },
    { freq: 320, durMs: 300 },
    { freq: 0, durMs: 220 },
  ];

  const samples: number[] = [];
  for (const seg of segments) {
    const count = Math.round((seg.durMs / 1000) * sampleRate);
    for (let i = 0; i < count; i++) {
      samples.push(seg.freq > 0 ? amplitude * Math.sin((2 * Math.PI * seg.freq * i) / sampleRate) : 0);
    }
  }

  const dataLength = samples.length * 2;
  const buffer = Buffer.alloc(44 + dataLength);
  const view = new DataView(buffer.buffer, buffer.byteOffset, buffer.byteLength);

  writeAsciiString(view, 0, "RIFF");
  view.setUint32(4, 36 + dataLength, true);
  writeAsciiString(view, 8, "WAVE");
  writeAsciiString(view, 12, "fmt ");
  view.setUint32(16, 16, true);
  view.setUint16(20, 1, true); // PCM
  view.setUint16(22, 1, true); // mono
  view.setUint32(24, sampleRate, true);
  view.setUint32(28, sampleRate * 2, true); // byte rate(mono·16비트)
  view.setUint16(32, 2, true); // block align
  view.setUint16(34, 16, true); // bits per sample
  writeAsciiString(view, 36, "data");
  view.setUint32(40, dataLength, true);

  for (let i = 0; i < samples.length; i++) {
    const clamped = Math.max(-1, Math.min(1, samples[i]));
    view.setInt16(44 + i * 2, Math.round(clamped * 32767), true);
  }
  return buffer;
}

async function routeSessionScreen(page: Page) {
  const startedAt = new Date(Date.now() - 60_000);

  // catch-all을 먼저 등록한다 — Playwright는 나중에 등록한 route가 이긴다.
  await page.route("**/api/**", (route) => route.fulfill(jsonRoute({ detail: "not part of this fixture" }, 404)));

  await page.route("**/api/auth/me", (route) =>
    route.fulfill(
      jsonRoute({
        user_id: "00000000-0000-0000-0000-0avatarspeech",
        email: "avatar-speech.learner@hs.ac.kr",
        display_name: "학습자",
        role: "learner",
        admin_access: false,
        super_admin: false,
        account_status: "approved",
        approval_required: false,
        cohort_ids: [],
        consent_at: Math.floor(Date.now() / 1000),
        onboarding_completed_at: Math.floor(Date.now() / 1000),
        nickname: "학습자",
        self_introduction: "아바타 v3 발화 연결 E2E 검증용 학습자입니다.",
        avatar_url: "",
      }),
    ),
  );

  await page.route("**/api/users/me/prepost-measures**", (route) =>
    route.fulfill(
      jsonRoute({
        pilot_id: "phase3-pilot-draft",
        instrument_version: "pilot-prepost-scaffold-2026-06-28",
        measures: [],
        complete_pre_count: 0,
        complete_post_count: 0,
        updated_at: null,
      }),
    ),
  );

  await page.route("**/api/personas", (route) =>
    route.fulfill(
      jsonRoute([
        {
          code: "P1",
          display_name: "서연(가명) · 고2 · 우울/자살사고",
          difficulty: "hard",
          theory_target: ["humanistic", "cbt"],
          demographics: { age_band: "16-18", sex: "female", grade: "고2", status: "재학" },
          presenting_summary: "우울감과 자살사고 위험",
          voice_preset: null,
          source: "database",
          degraded: false,
        },
      ]),
    ),
  );

  await page.route("**/api/voice/health", (route) =>
    route.fulfill(jsonRoute({ available: false, reason: "e2e fixture" })),
  );

  await page.route("**/api/sessions", async (route) => {
    if (route.request().method() !== "POST") {
      await route.fallback();
      return;
    }
    await route.fulfill(
      jsonRoute(
        {
          session_id: SESSION_ID,
          case_id: "avatar-speech-case-001",
          session_no: 1,
          stage: "라포",
          effective_openness: 0.3,
          recall_summary: null,
          degraded: false,
        },
        201,
      ),
    );
  });

  await page.route(`**/api/sessions/${SESSION_ID}`, (route) =>
    route.fulfill(
      jsonRoute({
        session_id: SESSION_ID,
        case_id: "avatar-speech-case-001",
        persona_code: "P1",
        persona_name: "서연",
        session_no: 1,
        status: "active",
        stage: "라포",
        theory_mode: "humanistic",
        effective_openness: 0.3,
        started_at: startedAt.toISOString(),
        ended_at: null,
        review_ready: false,
        turns: [],
      }),
    ),
  );

  // 회기 전 자기점검(pre)은 이미 원장에 잠긴 상태로 제공한다 — 이 스펙의 대상이 아니다.
  await page.route(`**/api/sessions/${SESSION_ID}/alliance-pulses`, async (route) => {
    if (route.request().method() === "POST") {
      await route.fulfill(jsonRoute({ pulse_id: "aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa", status: "awaiting_agents" }, 202));
      return;
    }
    await route.fulfill(
      jsonRoute({
        items: [
          {
            pulse_id: "aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa",
            checkpoint: "pre",
            status: "ready",
            learner_locked_at: startedAt.toISOString(),
            revealed_at: startedAt.toISOString(),
            error_code: null,
            self_scores: { goal: 0.5, task: 0.5, bond: 0.5 },
            measurements: [],
          },
        ],
      }),
    );
  });

  await page.route(`**/api/sessions/${SESSION_ID}/live-coach`, (route) =>
    route.fulfill(jsonRoute({ source: "database", quota: { remaining: 3, max: 3 }, credit_events: [], events: [] })),
  );
}

function doneEvent(overrides: Record<string, unknown> = {}) {
  return {
    session_id: SESSION_ID,
    stage: "라포",
    effective_openness: 0.42,
    turn_seq: 1,
    safety_flagged: false,
    ...overrides,
  };
}

async function sendLearnerTurn(page: Page) {
  const input = page.getByLabel("학습자 발화 입력");
  await input.fill(LEARNER_TEXT);
  await page.getByRole("button", { name: "보내기" }).click();
}

/** 재생 중 data-viseme가 거친 서로 다른 값의 집합(관찰 상한 5초, 50ms 간격 표본). */
async function collectDistinctVisemes(locator: Locator, minDistinct: number): Promise<Set<string>> {
  const seen = new Set<string>();
  const deadline = Date.now() + 5_000;
  while (Date.now() < deadline) {
    const viseme = await locator.getAttribute("data-viseme");
    if (viseme) seen.add(viseme);
    if (seen.size >= minDistinct) break;
    await new Promise((resolve) => setTimeout(resolve, 50));
  }
  return seen;
}

test.describe("P1 세션 — v3 아바타 TTS 발화 연결", () => {
  test("TTS 오디오 재생 중 립싱크가 돌고, 끝나면 발화 속성이 정리된다", async ({ page }) => {
    await routeSessionScreen(page);
    await page.route("**/api/voice/speech", (route) =>
      route.fulfill({ status: 200, contentType: "audio/wav", body: buildToneBurstWav() }),
    );
    await page.route(`**/api/sessions/${SESSION_ID}/stream`, (route) => fulfillTurn(route, [CLIENT_REPLY], doneEvent()));

    await page.goto("/learn/session/P1");
    await page.getByRole("button", { name: "회기 시작" }).click();
    await expect(page.locator(".sx-page--active")).toBeVisible({ timeout: 15_000 });

    await sendLearnerTurn(page);

    const v3 = page.locator(".sx-page--active .vg-avatar [data-avatar-renderer='linocut']");
    await expect(v3).toHaveAttribute("data-speech-source", "audio", { timeout: 15_000 });

    const visemes = await collectDistinctVisemes(v3, 2);
    expect(visemes.size, `관찰한 비짐: ${[...visemes].join(",")}`).toBeGreaterThanOrEqual(2);

    await expect(v3).not.toHaveAttribute("data-speech-source", "audio", { timeout: 10_000 });
    await expect(v3).toHaveAttribute("data-viseme", "X", { timeout: 10_000 });
  });

  test("TTS 실패(500)면 텍스트 타이밍 발화로 떨어진다", async ({ page }) => {
    await routeSessionScreen(page);
    await page.route("**/api/voice/speech", (route) => route.fulfill(jsonRoute({ detail: "tts failure fixture" }, 500)));
    await page.route(`**/api/sessions/${SESSION_ID}/stream`, (route) => fulfillTurn(route, [CLIENT_REPLY], doneEvent()));

    await page.goto("/learn/session/P1");
    await page.getByRole("button", { name: "회기 시작" }).click();
    await expect(page.locator(".sx-page--active")).toBeVisible({ timeout: 15_000 });

    await sendLearnerTurn(page);

    const v3 = page.locator(".sx-page--active .vg-avatar [data-avatar-renderer='linocut']");
    await expect(v3).toHaveAttribute("data-speech-source", "text", { timeout: 15_000 });

    const visemes = await collectDistinctVisemes(v3, 2);
    expect(visemes.size, `관찰한 비짐: ${[...visemes].join(",")}`).toBeGreaterThanOrEqual(2);
  });
});