/* =====================================================================
   ClientAvatar — 페르소나 / 표정 파라미터 타입 + Live2D식 상태머신 테이블
   출처: docs/DESIGN_CONCEPT.md §4.5(6파라미터 정서 상태머신) / §4.6(페르소나 시스템)

   ── Rive/Live2D 2차 교체 지점 ─────────────────────────────────────
   SVG 1차안은 아래 파라미터를 매 프레임 transform 으로 인코딩한다.
   Cubism/Rive 전환 시: 이 파일의 (state, expression, resistance, rapport)
   입력 계약은 그대로 두고, AffectParams → 모델 파라미터 입력으로 wiring 한다.
   ===================================================================== */

/* ── 음성 UI 4-state (§4.2) ─────────────────────────────────────────── */
export type AvatarState = "idle" | "listening" | "thinking" | "speaking";

/* ── 내담자 표정 프리셋: 모든 캐릭터가 최소 20개 이상 사용 가능 ─────── */
export type AvatarExpression =
  | "neutral"
  | "calm"
  | "warm"
  | "joy"
  | "delight"
  | "relief"
  | "hopeful"
  | "sad"
  | "grief"
  | "lonely"
  | "anxious"
  | "panic"
  | "confused"
  | "conflicted"
  | "startled"
  | "embarrassed"
  | "ashamed"
  | "guilty"
  | "resistant"
  | "guarded"
  | "skeptical"
  | "irritated"
  | "angry"
  | "rage"
  | "tired"
  | "bored"
  | "overwhelmed"
  | "determined";

/* 기존 import 표면 호환용 이름. */
export type AvatarAffect = AvatarExpression;

export interface AvatarExpressionMeta {
  id: AvatarExpression;
  label: string;
  group: "positive" | "negative" | "defensive" | "cognitive" | "energy";
}

export const AVATAR_EXPRESSION_LIBRARY: readonly AvatarExpressionMeta[] = [
  { id: "neutral", label: "중립", group: "cognitive" },
  { id: "calm", label: "차분함", group: "positive" },
  { id: "warm", label: "온화함", group: "positive" },
  { id: "joy", label: "기쁨", group: "positive" },
  { id: "delight", label: "반가움", group: "positive" },
  { id: "relief", label: "안도", group: "positive" },
  { id: "hopeful", label: "희망", group: "positive" },
  { id: "sad", label: "슬픔", group: "negative" },
  { id: "grief", label: "비탄", group: "negative" },
  { id: "lonely", label: "외로움", group: "negative" },
  { id: "anxious", label: "불안", group: "negative" },
  { id: "panic", label: "공황", group: "negative" },
  { id: "confused", label: "혼란", group: "cognitive" },
  { id: "conflicted", label: "갈등", group: "cognitive" },
  { id: "startled", label: "놀람", group: "negative" },
  { id: "embarrassed", label: "당황", group: "negative" },
  { id: "ashamed", label: "수치심", group: "negative" },
  { id: "guilty", label: "죄책감", group: "negative" },
  { id: "resistant", label: "저항", group: "defensive" },
  { id: "guarded", label: "경계", group: "defensive" },
  { id: "skeptical", label: "회의", group: "defensive" },
  { id: "irritated", label: "짜증", group: "defensive" },
  { id: "angry", label: "분노", group: "defensive" },
  { id: "rage", label: "격노", group: "defensive" },
  { id: "tired", label: "피곤", group: "energy" },
  { id: "bored", label: "무심함", group: "energy" },
  { id: "overwhelmed", label: "압도감", group: "negative" },
  { id: "determined", label: "결심", group: "positive" },
];

const EXPRESSION_LABELS: Record<AvatarExpression, string> = Object.fromEntries(
  AVATAR_EXPRESSION_LIBRARY.map((expression) => [expression.id, expression.label]),
) as Record<AvatarExpression, string>;

export function expressionLabelFor(expression: AvatarExpression): string {
  return EXPRESSION_LABELS[expression];
}

/* ── 연령대 (§4.6 외형 규칙) ───────────────────────────────────────── */
export type AvatarAgeBand = "teen" | "youngAdult" | "adult" | "senior";

export type AvatarHairStyle =
  | "short"
  | "bob"
  | "long-straight"
  | "soft-wave"
  | "messy"
  | "side-part";

export interface AvatarPersona {
  /** "서연 · 17세 · 고2" 같은 메타 1줄 라벨 */
  label: string;
  /** DB persona code. 외형 시드와 테스트 식별에 사용 */
  code?: string;
  /** 연령대 (외형 규칙 §4.6) */
  ageBand: AvatarAgeBand;
  /** 피부톤 hex */
  skinTone: string;
  /** 헤어 스타일/색 */
  hair: { style?: AvatarHairStyle; color: string };
  /** 의상/상반신 실루엣 색 */
  outfitColor?: string;
  /** 눈동자 색 */
  eyeColor?: string;
  /** 캐릭터 고유 보조색 */
  accentColor?: string;
  /**
   * 래스터(비트맵) 아트셋 코드. 지정하면 SVG 파라미터 리그 대신
   * `/avatar/<artSet>/<variant>.png` 레이어 합성(Live2D식)으로 렌더링한다.
   * 미지정 시 기존 SVG 리그. asset 은 imagegen(gpt-image-2)+BiRefNet 누끼로 생성.
   */
  rasterArtSet?: string;
  /** 사실성 0.35~0.45 고정 (불쾌한 골짜기 회피) */
  realism: number;
  /**
   * 저항도 0~1 (§4.6). 라포가 쌓이면 감소한다.
   * 미지정 시 defensive expression → 0.6, 그 외 0 으로 본다.
   */
  resistance?: number;
  /** 해당 페르소나의 기본 정서 경향 */
  expressionBias?: AvatarExpression;
}

/* ── 표정 파라미터 상태머신 (§4.5) ──────────────────────────────────
   Live2D/Cubism 파라미터처럼 작은 수치들을 조합한다. 과장 금지:
   눈물/홍조/땀/만화식 효과 없이 "감지되되 단언되지 않는" 수준. */
export interface AffectParams {
  /** 눈꺼풀 하강 px (우울 1~2px, 놀람은 음수) */
  eyelidDrop: number;
  /** 눈 세로 개방 배율 */
  eyeOpen: number;
  /** 동공/홍채 배율 */
  pupilScale: number;
  /** 시선 회피 x 오프셋 px */
  gazeAvert: number;
  /** 머리 기울기 deg */
  headTilt: number;
  /** 어깨 돌아선 각도 deg (저항 8° → 라포로 0°) */
  shoulderTurn: number;
  /** 호흡 주기 초 (= breathRate 역수 표현) */
  breathPeriod: number;
  /** 호흡 진폭 px (translateY 1.5~2.5) */
  breathAmp: number;
  /** 광배 색조 (CSS 색/변수) */
  auraHue: string;
  /** 광배 기본 opacity */
  auraOpacity: number;
  /** 깜빡임 최소 간격 초 */
  blinkMin: number;
  /** 깜빡임 최대 간격 초 */
  blinkMax: number;
  /** 입꼬리 곡률 (양수=미소, 음수=처짐) */
  mouthCurve: number;
  /** 기본 입 열림 0~1. 발화 립싱크와 max 처리 */
  mouthOpen: number;
  /** 입 너비 px 보정 */
  mouthWidth: number;
  /** 입술 긴장도 0~1 */
  mouthTension: number;
  /** 눈썹 안쪽 끝 기울기 px (양수=안쪽 처짐, 음수=안쪽 올라감) */
  browTilt: number;
  /** 눈썹 전체 들어올림 px (양수=위로) */
  browLift: number;
  /** 눈썹 안쪽 모임 px */
  browPinch: number;
}

const DEFAULT_PARAMS: AffectParams = {
  eyelidDrop: 0,
  eyeOpen: 1,
  pupilScale: 1,
  gazeAvert: 0,
  headTilt: 0,
  shoulderTurn: 0,
  breathPeriod: 4,
  breathAmp: 2,
  auraHue: "#3E7A6E",
  auraOpacity: 0.04,
  blinkMin: 4,
  blinkMax: 7,
  mouthCurve: 1.2,
  mouthOpen: 0,
  mouthWidth: 0,
  mouthTension: 0.2,
  browTilt: 0,
  browLift: 0,
  browPinch: 0,
};

const AFFECT_TABLE: Record<AvatarExpression, Partial<AffectParams>> = {
  neutral: {},
  calm: {
    eyelidDrop: 0.4,
    eyeOpen: 0.96,
    breathPeriod: 4.8,
    breathAmp: 1.7,
    auraHue: "#4F837A",
    mouthCurve: 0.8,
    blinkMin: 4.8,
    blinkMax: 7.5,
  },
  warm: {
    eyeOpen: 1.02,
    breathPeriod: 4.2,
    auraHue: "#6E8B82",
    auraOpacity: 0.055,
    mouthCurve: 2.2,
    mouthWidth: 1,
    browLift: 0.4,
  },
  joy: {
    eyeOpen: 1.06,
    pupilScale: 1.04,
    breathPeriod: 3.7,
    breathAmp: 2.3,
    auraHue: "#5F968B",
    auraOpacity: 0.07,
    mouthCurve: 3.2,
    mouthOpen: 0.08,
    mouthWidth: 1.5,
    browLift: 0.9,
  },
  delight: {
    eyeOpen: 1.12,
    pupilScale: 1.08,
    breathPeriod: 3.3,
    breathAmp: 2.4,
    auraHue: "#7A9464",
    auraOpacity: 0.075,
    blinkMin: 3.3,
    blinkMax: 5.5,
    mouthCurve: 3.8,
    mouthOpen: 0.16,
    mouthWidth: 2,
    browLift: 1.3,
  },
  relief: {
    eyelidDrop: 0.7,
    eyeOpen: 0.94,
    headTilt: 1,
    breathPeriod: 5.2,
    breathAmp: 1.9,
    auraHue: "#6E8B82",
    auraOpacity: 0.06,
    mouthCurve: 1.7,
    browLift: 0.2,
  },
  hopeful: {
    eyeOpen: 1.08,
    pupilScale: 1.04,
    gazeAvert: -0.8,
    breathPeriod: 4,
    auraHue: "#4F8C78",
    auraOpacity: 0.065,
    mouthCurve: 2.3,
    mouthWidth: 1,
    browLift: 1,
  },
  sad: {
    eyelidDrop: 1.5,
    eyeOpen: 0.88,
    gazeAvert: 1.5,
    headTilt: -1,
    shoulderTurn: 1,
    breathPeriod: 5.5,
    breathAmp: 1.5,
    auraHue: "#5B6B73",
    auraOpacity: 0.05,
    blinkMin: 5,
    blinkMax: 8,
    mouthCurve: -1.2,
    browTilt: 1.2,
    browPinch: 0.5,
  },
  grief: {
    eyelidDrop: 2.2,
    eyeOpen: 0.82,
    gazeAvert: 2,
    headTilt: -1.6,
    shoulderTurn: 1.5,
    breathPeriod: 6.2,
    breathAmp: 1.25,
    auraHue: "#56636C",
    auraOpacity: 0.055,
    blinkMin: 5.5,
    blinkMax: 8.5,
    mouthCurve: -2.2,
    mouthWidth: -1,
    browTilt: 1.8,
    browPinch: 1,
  },
  lonely: {
    eyelidDrop: 1.4,
    eyeOpen: 0.9,
    gazeAvert: 2.8,
    headTilt: -2,
    shoulderTurn: 2.5,
    breathPeriod: 5.8,
    breathAmp: 1.35,
    auraHue: "#66727A",
    auraOpacity: 0.045,
    mouthCurve: -0.8,
    mouthWidth: -0.8,
    browTilt: 1,
  },
  anxious: {
    eyeOpen: 1.1,
    pupilScale: 0.96,
    gazeAvert: 2,
    headTilt: 0.8,
    shoulderTurn: 2,
    breathPeriod: 3,
    breathAmp: 1.5,
    auraHue: "#3B6E8F",
    auraOpacity: 0.05,
    blinkMin: 2,
    blinkMax: 4,
    mouthCurve: -0.1,
    mouthTension: 0.6,
    browTilt: 0.4,
    browLift: 0.5,
    browPinch: 1,
  },
  panic: {
    eyelidDrop: -0.8,
    eyeOpen: 1.24,
    pupilScale: 0.9,
    gazeAvert: 3,
    headTilt: 1.6,
    shoulderTurn: 3.5,
    breathPeriod: 2.35,
    breathAmp: 1.35,
    auraHue: "#2E5A7A",
    auraOpacity: 0.075,
    blinkMin: 1.6,
    blinkMax: 3,
    mouthCurve: -0.8,
    mouthOpen: 0.2,
    mouthWidth: 0.5,
    mouthTension: 0.85,
    browTilt: -0.8,
    browLift: 2.4,
    browPinch: 1.4,
  },
  confused: {
    eyeOpen: 1.02,
    gazeAvert: 2.4,
    headTilt: 3,
    shoulderTurn: 1.5,
    breathPeriod: 4.2,
    auraHue: "#5B6B73",
    auraOpacity: 0.045,
    blinkMin: 4.5,
    blinkMax: 7,
    mouthCurve: -0.2,
    mouthOpen: 0.04,
    browTilt: -0.8,
    browLift: 0.8,
    browPinch: 0.8,
  },
  conflicted: {
    eyelidDrop: 0.6,
    eyeOpen: 0.96,
    gazeAvert: 2.2,
    headTilt: -2.6,
    shoulderTurn: 2,
    breathPeriod: 4.8,
    breathAmp: 1.45,
    auraHue: "#776F85",
    auraOpacity: 0.045,
    mouthCurve: -0.4,
    mouthWidth: -0.4,
    mouthTension: 0.55,
    browTilt: 0.6,
    browPinch: 1.2,
  },
  startled: {
    eyelidDrop: -1.2,
    eyeOpen: 1.22,
    pupilScale: 0.95,
    headTilt: 1.2,
    shoulderTurn: 1,
    breathPeriod: 2.8,
    breathAmp: 1.7,
    auraHue: "#8A6B42",
    auraOpacity: 0.07,
    blinkMin: 2.2,
    blinkMax: 4.2,
    mouthCurve: -0.2,
    mouthOpen: 0.24,
    browLift: 2.2,
  },
  embarrassed: {
    eyelidDrop: 0.9,
    eyeOpen: 0.9,
    gazeAvert: 3.2,
    headTilt: 2.2,
    shoulderTurn: 2.4,
    breathPeriod: 3.4,
    auraHue: "#8B6F6B",
    auraOpacity: 0.05,
    blinkMin: 2.7,
    blinkMax: 4.6,
    mouthCurve: 0.6,
    mouthWidth: -0.5,
    browTilt: 0.5,
    browLift: -0.2,
  },
  ashamed: {
    eyelidDrop: 1.8,
    eyeOpen: 0.82,
    gazeAvert: 4,
    headTilt: -2.8,
    shoulderTurn: 4,
    breathPeriod: 5.5,
    breathAmp: 1.2,
    auraHue: "#716873",
    auraOpacity: 0.04,
    mouthCurve: -1.5,
    mouthWidth: -1,
    mouthTension: 0.5,
    browTilt: 1.4,
    browPinch: 0.9,
  },
  guilty: {
    eyelidDrop: 1.2,
    eyeOpen: 0.88,
    gazeAvert: 3.5,
    headTilt: -1.8,
    shoulderTurn: 3,
    breathPeriod: 5.2,
    breathAmp: 1.25,
    auraHue: "#6D7074",
    auraOpacity: 0.045,
    mouthCurve: -1.1,
    mouthWidth: -0.6,
    browTilt: 1,
    browPinch: 1.1,
  },
  resistant: {
    eyelidDrop: 0.5,
    eyeOpen: 0.96,
    gazeAvert: 4,
    headTilt: 0.6,
    shoulderTurn: 8,
    breathPeriod: 5,
    breathAmp: 1,
    auraHue: "#93A09C",
    auraOpacity: 0.03,
    blinkMin: 4,
    blinkMax: 7,
    mouthCurve: -0.4,
    mouthWidth: -0.8,
    mouthTension: 0.65,
    browTilt: -0.4,
    browPinch: 0.6,
  },
  guarded: {
    eyelidDrop: 0.3,
    eyeOpen: 0.92,
    gazeAvert: 3.4,
    headTilt: 1.5,
    shoulderTurn: 6,
    breathPeriod: 4.8,
    breathAmp: 1.1,
    auraHue: "#7D8784",
    auraOpacity: 0.035,
    mouthCurve: -0.3,
    mouthWidth: -1.2,
    mouthTension: 0.75,
    browTilt: -0.2,
    browPinch: 1,
  },
  skeptical: {
    eyelidDrop: 0.6,
    eyeOpen: 0.9,
    gazeAvert: 1.8,
    headTilt: 2.8,
    shoulderTurn: 3,
    breathPeriod: 4.6,
    auraHue: "#7E8176",
    auraOpacity: 0.035,
    mouthCurve: -0.6,
    mouthWidth: -0.3,
    mouthTension: 0.7,
    browTilt: -1.2,
    browLift: -0.5,
    browPinch: 0.8,
  },
  irritated: {
    eyelidDrop: 0.4,
    eyeOpen: 0.95,
    gazeAvert: 1.2,
    headTilt: -1.2,
    shoulderTurn: 3.5,
    breathPeriod: 3.6,
    breathAmp: 1.25,
    auraHue: "#8A5A00",
    auraOpacity: 0.055,
    blinkMin: 3,
    blinkMax: 5.5,
    mouthCurve: -0.9,
    mouthWidth: -0.5,
    mouthTension: 0.85,
    browTilt: -1.4,
    browPinch: 1.4,
  },
  angry: {
    eyelidDrop: 0.1,
    eyeOpen: 1.0,
    pupilScale: 0.95,
    gazeAvert: 0.6,
    headTilt: -1,
    shoulderTurn: 4,
    breathPeriod: 3.1,
    breathAmp: 1.6,
    auraHue: "#9A5A3D",
    auraOpacity: 0.07,
    blinkMin: 3.2,
    blinkMax: 5,
    mouthCurve: -1.2,
    mouthOpen: 0.06,
    mouthWidth: 0.6,
    mouthTension: 0.9,
    browTilt: -2,
    browPinch: 1.8,
  },
  rage: {
    eyelidDrop: -0.2,
    eyeOpen: 1.12,
    pupilScale: 0.9,
    gazeAvert: 0.2,
    headTilt: -1.4,
    shoulderTurn: 5,
    breathPeriod: 2.7,
    breathAmp: 1.9,
    auraHue: "#A8352C",
    auraOpacity: 0.09,
    blinkMin: 2.8,
    blinkMax: 4.5,
    mouthCurve: -1.8,
    mouthOpen: 0.22,
    mouthWidth: 1.2,
    mouthTension: 1,
    browTilt: -2.4,
    browPinch: 2,
  },
  tired: {
    eyelidDrop: 2,
    eyeOpen: 0.78,
    gazeAvert: 1,
    headTilt: -1.8,
    shoulderTurn: 1,
    breathPeriod: 6,
    breathAmp: 1,
    auraHue: "#6F7777",
    auraOpacity: 0.035,
    blinkMin: 5.8,
    blinkMax: 9,
    mouthCurve: -0.7,
    mouthWidth: -0.8,
    browTilt: 0.3,
    browLift: -0.6,
  },
  bored: {
    eyelidDrop: 1.6,
    eyeOpen: 0.82,
    gazeAvert: 2,
    headTilt: 2,
    shoulderTurn: 2,
    breathPeriod: 5.4,
    breathAmp: 1,
    auraHue: "#7B827C",
    auraOpacity: 0.03,
    blinkMin: 5,
    blinkMax: 8.5,
    mouthCurve: -0.2,
    mouthWidth: -1,
    mouthTension: 0.5,
    browLift: -0.8,
  },
  overwhelmed: {
    eyelidDrop: 1,
    eyeOpen: 0.94,
    gazeAvert: 3,
    headTilt: -2.4,
    shoulderTurn: 3.5,
    breathPeriod: 3.2,
    breathAmp: 1.15,
    auraHue: "#6B5E7D",
    auraOpacity: 0.06,
    blinkMin: 2.4,
    blinkMax: 4,
    mouthCurve: -1.1,
    mouthOpen: 0.05,
    mouthTension: 0.65,
    browTilt: 1.1,
    browPinch: 1.5,
  },
  determined: {
    eyeOpen: 1.03,
    gazeAvert: 0,
    headTilt: 0,
    shoulderTurn: 0.4,
    breathPeriod: 3.8,
    breathAmp: 1.8,
    auraHue: "#3E7A6E",
    auraOpacity: 0.06,
    mouthCurve: 0.4,
    mouthWidth: 0.2,
    mouthTension: 0.75,
    browTilt: -0.8,
    browPinch: 0.8,
  },
};

/* ── 연령대 외형 규칙 (§4.6) ────────────────────────────────────────── */
export interface AgeBandLook {
  /** 눈 크기 배율 */
  eyeSize: number;
  /** 턱 폭 배율 (작을수록 좁은 턱) */
  jawWidth: number;
  /** 광배 채도 가중(생기) */
  auraSaturation: number;
}

const AGE_TABLE: Record<AvatarAgeBand, AgeBandLook> = {
  teen: { eyeSize: 1.15, jawWidth: 0.92, auraSaturation: 1.1 },
  youngAdult: { eyeSize: 1.0, jawWidth: 1.0, auraSaturation: 1.0 },
  adult: { eyeSize: 0.95, jawWidth: 1.06, auraSaturation: 0.9 },
  senior: { eyeSize: 0.92, jawWidth: 1.0, auraSaturation: 0.85 },
};

export function ageLookFor(ageBand: AvatarAgeBand): AgeBandLook {
  return AGE_TABLE[ageBand];
}

/* ── 표정 → 파라미터 해석 (라포 완화 + 상태 보정 포함) ─────────────────
   rapport 0~1: 세션 진행으로 쌓이는 라포. 저항 파라미터를 서서히 푼다. */
export function resolveAffectParams(
  affect: AvatarAffect,
  state: AvatarState,
  rapport: number,
): AffectParams {
  const out: AffectParams = { ...DEFAULT_PARAMS, ...AFFECT_TABLE[affect] };

  const r = Math.min(1, Math.max(0, rapport));
  if (r > 0) {
    out.shoulderTurn = out.shoulderTurn * (1 - r);
    out.gazeAvert = out.gazeAvert * (1 - 0.85 * r);
    out.eyelidDrop = out.eyelidDrop * (1 - 0.35 * r);
    out.browPinch = out.browPinch * (1 - 0.45 * r);
    if (affect === "resistant" || affect === "guarded" || affect === "skeptical") {
      out.auraHue = r > 0.5 ? "#6E8B82" : out.auraHue;
      out.mouthCurve += r * 1.2;
    }
  }

  switch (state) {
    case "thinking":
      // 생각 중 표현을 또렷하게: 시선 회피(위/옆 응시) + 고개 기울임 + 사색 눈썹.
      out.gazeAvert = Math.max(out.gazeAvert, 3.5);
      out.blinkMin = out.blinkMin * 1.35;
      out.blinkMax = out.blinkMax * 1.35;
      out.auraOpacity *= 0.85;
      out.breathAmp *= 0.6;
      out.headTilt += out.headTilt >= 0 ? 1.6 : -1.6;
      out.browLift += 0.3;
      break;
    case "listening":
      out.gazeAvert = out.gazeAvert * 0.4;
      out.browLift += 0.25;
      break;
    case "speaking":
      out.gazeAvert = out.gazeAvert * 0.35;
      out.mouthOpen = Math.max(out.mouthOpen, 0.02);
      break;
    case "idle":
      out.breathPeriod = Math.max(out.breathPeriod, 3.5);
      break;
  }

  return out;
}

/** persona.resistance → 초기 저항도. 미지정 시 defensive expression 으로 추정. */
export function baseResistanceOf(persona: AvatarPersona, affect: AvatarAffect): number {
  if (typeof persona.resistance === "number") return persona.resistance;
  const expression = AVATAR_EXPRESSION_LIBRARY.find((item) => item.id === affect);
  return expression?.group === "defensive" ? 0.6 : 0;
}