"use strict";


// Layer: entity-runtime/items/dynamic-system
// Owns pushpin/oshibyo item motion, attachment, lodged damage, and detach
// behavior. Prototype methods delegate here.
(function (global) {
  function isPin(item) {
    return Boolean(global.TarinaiPinAttachmentSystem.isPin(item) || (item && typeof global.isPinType === "function" && global.isPinType(item.type)));
  }

  function ballById(worldRef, id) {
    if (!worldRef || !id) return null;
    return (worldRef.items || []).find(it => it && !it.dead && it.type === "ball" && it.id === id) || null;
  }

  function removeFromBall(item, worldRef = null) {
    const ball = ballById(worldRef, item?.pinBallId) || null;
    if (ball?.stuckPinIds) ball.stuckPinIds = ball.stuckPinIds.filter(id => id !== item.id);
    if (ball && ball.stuckPinId === item?.id) ball.stuckPinId = "";
    if (item) item.pinBallId = "";
    return ball;
  }

  function updateBallLodged(item, dt, worldRef) {
    const ball = ballById(worldRef, item.pinBallId);
    if (!ball) {
      detach(item, worldRef, "ball-lost");
      return;
    }
    if (global.TarinaiPinAttachmentSystem.applyBallPose(item, ball, worldRef)) return;
    const angle = (ball.spin || 0) + (item.pinBallOffsetAngle || 0);
    const distance = Math.max(4, Number(item.pinBallOffsetDistance || (ball.r || 18) * 0.55) || (ball.r || 18) * 0.55);
    item.prevX = item.x;
    item.prevY = item.y;
    item.x = ball.x + Math.cos(angle) * distance;
    item.y = ball.y + Math.sin(angle) * distance;
    item.vx = ball.vx || 0;
    item.vy = ball.vy || 0;
    item.pinVisualSide = Math.cos(angle) >= 0 ? 1 : -1;
    item.spin = angle + (item.type === "oshibyo" ? 0.18 : Math.PI * 0.5);
    item.deletable = false;
    if (Number.isFinite(ball.spinVelocity)) item.spinVelocity = ball.spinVelocity;
    if (worldRef) worldRef.drawListDirty = true;
  }

  function attachToBall(item, ball, worldRef) {
    if (!isPin(item) || !ball || ball.dead || ball.type !== "ball" || item.dead) return false;
    if (item.pinState === "lodged" || item.pinState === "ball_lodged") return false;
    const now = worldRef?.time || 0;
    if ((item.noStickUntil || 0) > now) return false;
    const angle = deterministicAngle(worldRef, "pin-ball-stick-angle", item, ball, now);
    const dist = Math.max(4, (ball.r || 18) * deterministicRange(worldRef, "pin-ball-stick-distance", 0.24, 0.78, item, ball, now));
    item.pinState = "ball_lodged";
    item.pinBallId = ball.id;
    item.pinTargetId = "";
    item.pinBallOffsetAngle = angle - (ball.spin || 0);
    item.pinBallOffsetDistance = dist;
    item.pinVisualSide = Math.cos(angle) >= 0 ? 1 : -1;
    item.deletable = false;
    item.noStickUntil = now + 0.16;
    ball.stuckPinIds = Array.isArray(ball.stuckPinIds) ? ball.stuckPinIds : [];
    if (!ball.stuckPinIds.includes(item.id)) ball.stuckPinIds.push(item.id);
    ball.stuckPinId = ball.stuckPinIds[0] || item.id;
    updateBallLodged(item, 0, worldRef);
    worldRef?.effects?.push(new Effect("ring", item.x, item.y, { size: Math.max(12, (item.r || 8) * 1.4), life: 0.16, color: item.type === "oshibyo" ? "rgba(73,119,205,0.42)" : "rgba(214,72,72,0.42)" }));
    return true;
  }

  function transferFromBallToTarinai(item, ball, t, worldRef) {
    if (!item || item.dead || item.pinState !== "ball_lodged" || !ball || !t || t.dead) return false;
    const now = worldRef?.time || 0;
    if ((item._ballPinTransferredAt || -999) + 0.18 > now) return false;
    removeFromBall(item, worldRef);
    item.pinState = "loose";
    item.pinTargetId = "";
    item.noStickUntil = 0;
    item.noStickTargetId = "";
    item.noStickTargetUntil = 0;
    item.x = ball.x + deterministicRange(worldRef, "pin-transfer-x", -(ball.r || 18) * 0.25, (ball.r || 18) * 0.25, item, ball, t);
    item.y = ball.y + deterministicRange(worldRef, "pin-transfer-y", -(ball.r || 18) * 0.25, (ball.r || 18) * 0.25, item, ball, t);
    item._ballPinTransferredAt = now;
    const ok = attach(item, t, worldRef, distXY(item.x, item.y, t.x, t.y));
    if (!ok) attachToBall(item, ball, worldRef);
    return ok;
  }

  function transferBallPinsToTarinai(ball, t, worldRef) {
    if (!ball || !t || t.dead) return 0;
    const ids = Array.isArray(ball.stuckPinIds) ? [...ball.stuckPinIds] : (ball.stuckPinId ? [ball.stuckPinId] : []);
    let moved = 0;
    for (const id of ids) {
      const pin = (worldRef?.items || []).find(it => it && !it.dead && it.id === id && isPin(it));
      if (pin && transferFromBallToTarinai(pin, ball, t, worldRef)) moved += 1;
    }
    return moved;
  }

  function tryBallPickup(ball, worldRef) {
    if (!ball || ball.dead || ball.type !== "ball" || !worldRef?.nearbyItems) return 0;
    const speed = Math.hypot(ball.vx || 0, ball.vy || 0);
    const range = (ball.r || 18) + speed * Math.max(0.016, Number(worldRef.dt || 0.016) || 0.016) + 28;
    const candidates = worldRef.nearbyItems(ball.x, ball.y, range) || [];
    let picked = 0;
    const px = Number.isFinite(ball.prevX) ? ball.prevX : ball.x;
    const py = Number.isFinite(ball.prevY) ? ball.prevY : ball.y;
    const sx = ball.x - px;
    const sy = ball.y - py;
    const len2 = sx * sx + sy * sy;
    for (const pin of candidates) {
      if (!isPin(pin) || pin.dead || pin.pinState === "lodged" || pin.pinState === "ball_lodged") continue;
      let hitX = ball.x;
      let hitY = ball.y;
      if (len2 > 1) {
        const u = clamp(((pin.x - px) * sx + (pin.y - py) * sy) / len2, 0, 1);
        hitX = px + sx * u;
        hitY = py + sy * u;
      }
      const hit = (ball.r || 18) + Math.max(5, pin.r || 8) + 2;
      if (distXY(hitX, hitY, pin.x, pin.y) > hit) continue;
      if (attachToBall(pin, ball, worldRef)) picked += 1;
    }
    return picked;
  }

  function update(item, dt, worldRef) {
    if (!isPin(item) || item.dead) return false;
    if (!worldRef) return false;
    if (item.pinState === "lodged") {
      updateLodged(item, dt, worldRef);
      return true;
    }
    if (item.pinState === "ball_lodged") {
      updateBallLodged(item, dt, worldRef);
      return true;
    }
    if (global.TarinaiPhysics.applyKinematicItemMotion) {
      global.TarinaiPhysics.applyKinematicItemMotion(item, worldRef, dt, { padding: 26, bounce: 0.44, spinBounce: -0.68, frictionBase: 0.18, frictionRate: 0.85, spinFrictionBase: 0.38, spinRestDamp: 0.08, stopSpeed: 0.05, zeroBelow: 7.5 });
      global.TarinaiItemDynamicBallSystem.resolveObstacleCollisions(item, dt, worldRef);
    } else {
      item.prevX = item.x;
      item.prevY = item.y;
      item.x += (item.vx || 0) * dt;
      item.y += (item.vy || 0) * dt;
    }
    tryStick(item, worldRef);
    return true;
  }

  function tryStick(item, worldRef) {
    if (!worldRef?.tarinai?.length) return false;
    if (item.pinState === "lodged") return false;
    const now = worldRef.time || 0;
    if ((item.noStickUntil || 0) > now) return false;
    let best = null;
    let bestD = Infinity;
    const hitRange = Math.max(10, (item.r || 8) * 1.25);
    const candidates = worldRef.nearbyTarinai?.(item.x, item.y, hitRange + 32, true) || worldRef.tarinai;
    for (const t of candidates) {
      if (!t || t.dead) continue;
      if (item.noStickTargetId && item.noStickTargetId === t.id && (item.noStickTargetUntil || 0) > now) continue;
      const d = distXY(item.x, item.y, t.x, t.y);
      const hit = (t.radius || 16) * 0.86 + hitRange;
      if (d <= hit && d < bestD) { best = t; bestD = d; }
    }
    if (!best) return false;
    return attach(item, best, worldRef, bestD);
  }

  function oshibyoAnchorFor(t, visualSide, item = { type: "oshibyo" }) {
    return global.TarinaiPinAttachmentSystem.tarinaiAnchor(item, t, { visualSide }) || {
      x: t.x + visualSide * (t?.radius || 16) * 0.96,
      y: t.y + (t?.radius || 16) * 0.50,
      angle: visualSide * 0.48,
      distance: (t?.radius || 16) * 0.96,
      offsetY: (t?.radius || 16) * 0.48,
      visualSide,
    };
  }

  function attach(item, t, worldRef, d = null) {
    if (!t || t.dead) return false;
    if (t.stuckPushpinId && t.stuckPushpinId !== item.id) return false;
    const behavior = pinBehaviorFor(item.type);
    const isOshibyo = Boolean(behavior?.blocksZunchi);
    const dx = item.x - t.x;
    const dy = item.y - t.y;
    const distToTarget = Number.isFinite(d) ? d : Math.hypot(dx, dy);
    item.pinState = "lodged";
    item.deletable = false;
    item.pinTargetId = t.id;
    removeFromBall(item, worldRef);
    const sharedAnchor = global.TarinaiPinAttachmentSystem.tarinaiAnchor(item, t, { dx, dy, distance: distToTarget });
    const faceDir = t.facingDir ? t.facingDir() : (t.facing || 1);
    const faceSide = faceDir >= 0 ? 1 : -1;
    const visualSide = sharedAnchor?.visualSide ?? (isOshibyo ? -faceSide : faceSide);
    item.pinVisualSide = visualSide;
    const oshibyoAnchor = isOshibyo ? (sharedAnchor || oshibyoAnchorFor(t, visualSide, item)) : null;
    item.pinAttachAngle = isOshibyo ? oshibyoAnchor.angle : (sharedAnchor?.angle ?? Math.atan2(dy || -1, dx || visualSide));
    item.pinAttachDistance = isOshibyo ? oshibyoAnchor.distance : (sharedAnchor?.distance ?? clamp(distToTarget || (t.radius || 16) * 0.58, (t.radius || 16) * 0.20, (t.radius || 16) * 0.74));
    item.pinOffsetY = isOshibyo ? oshibyoAnchor.offsetY : (sharedAnchor?.offsetY ?? clamp(dy, -(t.radius || 16) * 0.74, (t.radius || 16) * 0.38));
    item.pinDamageTick = 0;
    item.pinFallCheckTimer = 0;
    item.vx = 0;
    item.vy = 0;
    item.spinVelocity = 0;
    item.spin = item.pinAttachAngle;
    t.stuckPushpinId = item.id;
    t.sleeping = false;
    if (!isOshibyo) t.awakeLockTimer = Math.max(t.awakeLockTimer || 0, 7);
    if (!isOshibyo) t.surpriseTimer = Math.max(t.surpriseTimer || 0, 0.8);
    if (isOshibyo) {
      t.thought = "\u304a\u3057\u308a\u92f2\u304c\u523a\u3055\u3063\u3066\u305a\u3093\u3061\u304c\u51fa\u306a\u304f\u306a\u3063\u305f";
      worldRef.log?.(`${t.name}\u306b\u304a\u3057\u308a\u92f2\u304c\u523a\u3055\u3063\u305f\u3002`, "accident", { participants: [t] });
      worldRef.effects?.push(new Effect("ring", t.x, t.y + (t.radius || 16) * 0.34, { size: Math.max(14, (t.radius || 16) * 0.58), life: 0.18, color: "rgba(73,119,205,0.36)" }));
      return true;
    }
    if (t.enterPanic) {
      t.enterPanic({ threat: item, reason: "\u753b\u92f2\u304c\u523a\u3055\u3063\u3066\u30d1\u30cb\u30c3\u30af\u306b\u306a\u3063\u3066\u3044\u308b", fear: 1.3, stress: behavior?.stressOnAttach ?? 18, hurtTimer: 1.2, awakeLockTimer: 7, surpriseTimer: 0.8, cause: "pushpin_attach" });
    } else {
      t.hurtTimer = Math.max(t.hurtTimer || 0, 1.2);
      t.fearTimer = Math.max(t.fearTimer || 0, 1.3);
      t.setActionState?.("panic", { target: t.panicDestination ? t.panicDestination(item) : { x: t.x + deterministicRange(worldRef, "pin-panic-target-x", -80, 80, item, t), y: t.y + deterministicRange(worldRef, "pin-panic-target-y", -80, 80, item, t) }, reason: "\u753b\u92f2\u304c\u523a\u3055\u3063\u3066\u30d1\u30cb\u30c3\u30af\u306b\u306a\u3063\u3066\u3044\u308b", wake: true });
      if (t.addStress) t.addStress(behavior?.stressOnAttach ?? 18, { threshold: 8 });
    }
    if (!isOshibyo && t.damage && (behavior?.damageOnAttach ?? 6) > 0) t.damage(behavior?.damageOnAttach ?? 6, "\u753b\u92f2", { source: item });
    if ((worldRef.time || 0) >= (item.pinLogAt || -999) + 1.2) {
      item.pinLogAt = worldRef.time || 0;
      worldRef.log?.(`${t.name}\u306b\u753b\u92f2\u304c\u523a\u3055\u3063\u305f\u3002`, "accident", { participants: [t] });
    }
    worldRef.effects?.push(new Effect("ring", t.x, t.y - (t.radius || 16) * 0.12, { size: Math.max(18, (t.radius || 16) * 0.90), life: 0.22, color: "rgba(214,72,72,0.50)" }));
    return true;
  }

  function updateLodged(item, dt, worldRef) {
    const t = worldRef.liveTarinaiById?.(item.pinTargetId) || null;
    if (!t) {
      detach(item, worldRef, "owner-lost");
      return;
    }
    const behavior = pinBehaviorFor(item.type);
    const isOshibyo = Boolean(behavior?.blocksZunchi);
    t.stuckPushpinId = item.id;
    item.deletable = false;
    const sharedPose = global.TarinaiPinAttachmentSystem.applyTarinaiPose(item, t, worldRef);
    if (!sharedPose) {
      const faceDir = t.facingDir ? t.facingDir() : (t.facing || 1);
      const faceSide = faceDir >= 0 ? 1 : -1;
      const visualSide = isOshibyo ? -faceSide : faceSide;
      item.pinVisualSide = visualSide;
      const oshibyoAnchor = isOshibyo ? oshibyoAnchorFor(t, visualSide, item) : null;
      item.x = isOshibyo ? oshibyoAnchor.x : t.x + visualSide * (t.radius || 16) * 0.36;
      item.y = isOshibyo ? oshibyoAnchor.y : t.y - (t.radius || 16) * 0.04;
      item.prevX = item.x;
      item.prevY = item.y;
      item.spin = isOshibyo ? oshibyoAnchor.angle : visualSide * 0.28;
      item.vx = t.vx || 0;
      item.vy = t.vy || 0;
    }
    if (isOshibyo) {
      if ((t.oshiriByoZunchiStock || 0) >= 6 && t.state !== "eat" && t.state !== "sleep") t.thought = "\u304a\u3057\u308a\u92f2\u3067\u305a\u3093\u3061\u304c\u6e9c\u307e\u3063\u3066\u3064\u3089\u3044";
      return;
    }
    item.pinDamageTick = (item.pinDamageTick || 0) + dt;
    while (item.pinDamageTick >= 0.55) {
      item.pinDamageTick -= 0.55;
      if (!isOshibyo && t.damage && (behavior?.damagePerTick ?? 1.4) > 0) t.damage(behavior?.damagePerTick ?? 1.4, "\u753b\u92f2", { source: item });
      t.hurtTimer = Math.max(t.hurtTimer || 0, 0.50);
      if (t.addStress) t.addStress(behavior?.stressPerTick ?? 2.6, { threshold: 8, duration: 3.4 });
      if (deterministicChance(worldRef, "pin-pain-bubble", 0.22, item, t)) t.bubble?.("!!", 0.6, "rgba(168,72,72,0.82)");
    }
    t.sleeping = false;
    if (t.enterPanic) t.enterPanic({ threat: item, reason: "\u753b\u92f2\u304c\u523a\u3055\u3063\u3066\u30d1\u30cb\u30c3\u30af\u306b\u306a\u3063\u3066\u3044\u308b", fear: 0.65, surpriseTimer: 0.22, awakeLockTimer: 2.4, cause: "pushpin_lodged" });
    else {
      t.setActionState?.("panic", { target: t.panicDestination ? t.panicDestination(item) : { x: t.x + deterministicRange(worldRef, "pin-panic-target-x", -80, 80, item, t), y: t.y + deterministicRange(worldRef, "pin-panic-target-y", -80, 80, item, t) }, reason: "\u753b\u92f2\u304c\u523a\u3055\u3063\u3066\u30d1\u30cb\u30c3\u30af\u306b\u306a\u3063\u3066\u3044\u308b", wake: true });
      t.fearTimer = Math.max(t.fearTimer || 0, 0.65);
      t.surpriseTimer = Math.max(t.surpriseTimer || 0, 0.22);
      t.awakeLockTimer = Math.max(t.awakeLockTimer || 0, 2.4);
    }
    item.pinFallCheckTimer = (item.pinFallCheckTimer || 0) + dt;
    while (item.pinFallCheckTimer >= 1.0) {
      item.pinFallCheckTimer -= 1.0;
      if (deterministicChance(worldRef, "pin-fall-out", 0.10, item, t)) {
        detach(item, worldRef, "fall");
        return;
      }
    }
  }

  function detach(item, worldRef, reason = "released") {
    const carriedBall = removeFromBall(item, worldRef);
    const t = worldRef?.liveTarinaiById?.(item.pinTargetId) || null;
    const behavior = pinBehaviorFor(item.type);
    const wasOshibyo = Boolean(behavior?.blocksZunchi);
    const storedZunchi = wasOshibyo && t ? Math.max(0, Math.floor(t.oshiriByoZunchiStock || 0)) : 0;
    if (t && t.stuckPushpinId === item.id) t.stuckPushpinId = null;
    if (t && wasOshibyo) t.oshiriByoZunchiStock = 0;
    if (reason === "pinch") {
      const now = worldRef?.time || 0;
      item.noStickUntil = now + 1.0;
      item.noStickTargetId = t?.id || "";
      item.noStickTargetUntil = now + 1.0;
    } else if (t) {
      const now = worldRef?.time || 0;
      item.noStickTargetId = t.id || "";
      item.noStickTargetUntil = now + 0.55;
    }
    item.pinState = "loose";
    item.pinTargetId = "";
    item.pinDamageTick = 0;
    item.pinFallCheckTimer = 0;
    item.deletable = true;
    if (reason === "pinch") {
      item.vx = 0;
      item.vy = 0;
      item.spinVelocity = 0;
    } else {
      let nx = 0;
      let ny = 1;
      if (t) {
        const dx = Number(item.x || 0) - Number(t.x || 0);
        const dy = Number(item.y || 0) - Number(t.y || 0);
        const d = Math.hypot(dx, dy);
        if (d > 0.001) { nx = dx / d; ny = dy / d; }
        else { nx = Math.sign(item.pinVisualSide || 0) || (t.facingDir?.() || 1); ny = 0.28; }
        const len = Math.hypot(nx, ny) || 1;
        nx /= len; ny /= len;
        const dropR = Math.max(8, (item.r || 8) + (t.radius || 16) * 0.58);
        const pad = CONFIG.worldPadding || 30;
        item.x = clamp((t.x || 0) + nx * dropR, pad, Math.max(pad, (worldRef?.w || item.x) - pad));
        item.y = clamp((t.y || 0) + ny * dropR + (wasOshibyo ? 4 : 0), pad, Math.max(pad, (worldRef?.h || item.y) - pad));
      } else if (carriedBall) {
        const dx = Number(item.x || 0) - Number(carriedBall.x || 0);
        const dy = Number(item.y || 0) - Number(carriedBall.y || 0);
        const d = Math.hypot(dx, dy) || 1;
        nx = dx / d;
        ny = dy / d;
      }
      const baseVx = Number(carriedBall?.vx || t?.vx || 0) || 0;
      const baseVy = Number(carriedBall?.vy || t?.vy || 0) || 0;
      item.vx = clamp(baseVx * 0.45 + nx * 18, -90, 90);
      item.vy = clamp(baseVy * 0.45 + Math.max(12, ny * 18), -60, 110);
      item.spinVelocity = clamp((item.spinVelocity || 0) * 0.35 + (Math.sign(nx) || 1) * 0.9, -2.2, 2.2);
      worldRef?.effects?.push(new Effect("ring", item.x, item.y, { size: Math.max(14, (item.r || 16) * 0.92), life: 0.16, color: "rgba(214,112,112,0.40)" }));
      if (reason === "fall" && t) worldRef?.log?.(`${t.name}\u306E\u753B\u92F2\u304C\u629C\u3051\u843D\u3061\u305F\u3002`, "observe", { participants: [t] });
    }
    if (wasOshibyo && storedZunchi > 0 && worldRef?.spawnBurstZunchi) {
      worldRef.spawnBurstZunchi(t || item, storedZunchi, item);
    }
  }

  global.TarinaiItemDynamicPinSystem = Object.freeze({
    update,
    isPin,
    attach,
    detach,
    transferBallPinsToTarinai,
    tryBallPickup,
  });
})(typeof window !== "undefined" ? window : globalThis);