import * as THREE from 'three';
import type { Game } from './Game';
import { Enemy } from './Enemy';
import { playSound } from './SoundManager';
import { InkBlob } from './InkBlob';
import { InkPuddle } from './InkPuddle';

const MAX_HEALTH = 3200;
const INK_COOLDOWN = 4.5;
const PULL_COOLDOWN = 7.5;
const PULL_MARK_COUNT = 5;
const PULL_MARK_RADIUS = 2.2;
const PULL_MARK_DIST = 6.5;
const PULL_CHARGE_TIME = 2.5;
const PULL_DAMAGE = 25;
const PULL_TIME = 0.6;
const SLAM_TIME = 0.5;
const HIT_FLASH_TIME = 0.14;
const SWEEP_RADIUS = 11;
const SWEEP_DURATION = 3.6;
const SWEEP_HIT_WIDTH = 1.2;
const SWEEP_DAMAGE = 25;
const ENRAGE_RATIO = 0.3;
const INK_RADIUS = 3.5;
const INK_DURATION = 6;

export class Krake extends Enemy {
  spawnAtCenter = true;
  private model: THREE.Group;
  private game: Game | null = null;
  private waveTime = 0;
  private tentacles: THREE.Group[] = [];
  private inkTimer = 2;
  private pullTimer = 3.5;
  private sweepTimer = 5;
  private enraged = false;
  private effectsReady = false;

  private slamState: 'none' | 'grab' | 'slam' = 'none';
  private slamChain!: THREE.Group;
  private slamTime = 0;
  private slamRetractFrom = 1;
  private pullState: 'idle' | 'charge' = 'idle';
  private pullChargeTime = 0;
  private markOffsetAngle = 0;
  private pullMarks: {
    group: THREE.Group;
    ringMat: THREE.MeshBasicMaterial;
    discMat: THREE.MeshBasicMaterial;
  }[] = [];

  private sweepTents: { group: THREE.Group; angle: number; dir: number; progress: number }[] = [];
  private sweepActive = false;
  private sweepHit = false;

  private inkBlobs: InkBlob[] = [];
  private puddles: InkPuddle[] = [];
  private skinMat!: THREE.MeshToonMaterial;
  private darkMat!: THREE.MeshToonMaterial;
  private hitFlash = 0;

  constructor() {
    super();
    this.health = MAX_HEALTH;
    this.maxHealth = MAX_HEALTH;
    this.isBoss = true;
    this.displayName = 'Krake';
    this.immovable = true;
    this.speed = 0;
    this.xp = 150;
    this.contactDps = 0;
    this.contactRadius = 0;
    this.guaranteedDrop = true;

    this.model = new THREE.Group();
    this.fadeOutModel = this.model;
    this.body.add(this.model);

    const skinMat = new THREE.MeshToonMaterial({ color: 0x8a4a9a });
    const darkMat = new THREE.MeshToonMaterial({ color: 0x5a2a6a });
    const eyeMat = new THREE.MeshBasicMaterial({ color: 0xffee44 });
    this.skinMat = skinMat;
    this.darkMat = darkMat;

    // Kopf
    const head = new THREE.Mesh(new THREE.SphereGeometry(2.2, 24, 18), skinMat);
    head.scale.set(1, 0.85, 1);
    head.position.y = 3.1;
    head.castShadow = true;
    this.registerFadeMesh(head);
    this.model.add(head);

    // Augen auf +Z (Blickrichtung)
    for (const side of [-1, 1]) {
      const eye = new THREE.Mesh(new THREE.SphereGeometry(0.4, 10, 8), eyeMat);
      eye.position.set(side * 0.8, 3.45, 1.9);
      this.registerFadeMesh(eye);
      this.model.add(eye);
    }

    // Tentakel um den Kopf herum
    for (let i = 0; i < 8; i++) {
      const chain = new THREE.Group();
      const a = (i / 8) * Math.PI * 2;
      for (let j = 0; j < 7; j++) {
        const seg = new THREE.Mesh(
          new THREE.SphereGeometry(0.42 - j * 0.04, 12, 10),
          j % 2 === 0 ? skinMat : darkMat
        );
        seg.position.set(j * 0.55, -j * 0.28, 0);
        this.registerFadeMesh(seg);
        chain.add(seg);
      }
      chain.position.set(Math.cos(a) * 1.7, 1.1, Math.sin(a) * 1.7);
      chain.rotation.y = -a;
      this.model.add(chain);
      this.tentacles.push(chain);
    }

    // Weltraum-Effekte (Pull-Marken, Slam-Tentakel, Sweep-Tentakel)
    this.buildEffects();
  }

  private buildEffects() {
    // 5 rote Boden-Marken (Arme) rund um den Oktopus
    for (let i = 0; i < PULL_MARK_COUNT; i++) {
      const ringMat = new THREE.MeshBasicMaterial({
        color: 0xff3333,
        transparent: true,
        opacity: 0,
        side: THREE.DoubleSide,
        depthWrite: false,
      });
      const discMat = new THREE.MeshBasicMaterial({
        color: 0xff2222,
        transparent: true,
        opacity: 0,
        depthWrite: false,
      });
      const ring = new THREE.Mesh(
        new THREE.RingGeometry(PULL_MARK_RADIUS - 0.15, PULL_MARK_RADIUS + 0.15, 32),
        ringMat
      );
      ring.rotation.x = -Math.PI / 2;
      ring.position.y = 0.05;
      const disc = new THREE.Mesh(new THREE.CircleGeometry(PULL_MARK_RADIUS, 32), discMat);
      disc.rotation.x = -Math.PI / 2;
      disc.position.y = 0.03;
      const group = new THREE.Group();
      group.add(ring, disc);
      group.visible = false;
      this.pullMarks.push({ group, ringMat, discMat });
    }

    this.slamChain = new THREE.Group();
    for (let j = 1; j <= 10; j++) {
      const seg = new THREE.Mesh(
        new THREE.SphereGeometry(0.3, 8, 6),
        new THREE.MeshToonMaterial({ color: 0x7a3a8a })
      );
      seg.position.set(0, 0, j * 0.5);
      this.slamChain.add(seg);
    }
    this.slamChain.visible = false;

    // Kreisende Sweep-Tentakel (dicker roter Arm mit Saugnaepfen, ueber den man springen kann)
    // Zwei Exemplare: Phase 2 nutzt beide in entgegengesetzte Richtungen
    for (let i = 0; i < 2; i++) {
      const group = this.buildSweepTentacle();
      group.visible = false;
      this.sweepTents.push({ group, angle: 0, dir: i === 0 ? 1 : -1, progress: 0 });
    }
  }

  private buildSweepTentacle(): THREE.Group {
    const sweepMat = new THREE.MeshToonMaterial({ color: 0xdd4455 });
    const cupMat = new THREE.MeshToonMaterial({ color: 0xffb3a0 });
    const cupGeom = new THREE.SphereGeometry(1, 10, 6);
    const group = new THREE.Group();
    for (let j = 1; j <= 18; j++) {
      const r = Math.max(0.22, 0.42 - j * 0.012);
      const seg = new THREE.Mesh(new THREE.SphereGeometry(r, 12, 10), sweepMat);
      seg.position.set(j * 0.6, 0.3, 0);
      group.add(seg);

      // Saugnapf: flache Scheibe, abwechselnd links/rechts
      const side = j % 2 === 0 ? 1 : -1;
      const cup = new THREE.Mesh(cupGeom, cupMat);
      cup.scale.set(r * 0.5, r * 0.18, r * 0.5);
      cup.position.set(j * 0.6, 0.3, side * (r + 0.02));
      group.add(cup);
    }
    return group;
  }

  playAnim() {
    // Prozedurale Optik
  }

  updateAnimation(dt: number) {
    this.updateFadeDeath(dt, { duration: 1.2, sink: 0.5 });
  }

  private ensureEffects(scene: THREE.Scene) {
    if (this.effectsReady) return;
    for (const mark of this.pullMarks) scene.add(mark.group);
    scene.add(this.slamChain);
    for (const tent of this.sweepTents) scene.add(tent.group);
    this.effectsReady = true;
  }

  update(dt: number, game: Game) {
    this.game = game;
    this.ensureEffects(game.scene);
    this.waveTime += dt;

    // Hit-Feedback: kurz weiss aufblitzen + leichtes Pulsieren
    if (this.hitFlash > 0) {
      this.hitFlash -= dt;
      this.skinMat.color.set(0xffffff);
      this.darkMat.color.set(0xffffff);
      this.model.scale.setScalar(1 + (this.hitFlash / HIT_FLASH_TIME) * 0.05);
    } else {
      this.skinMat.color.set(this.enraged ? 0x8a2233 : 0x8a4a9a);
      this.darkMat.color.set(this.enraged ? 0x551520 : 0x5a2a6a);
      this.model.scale.setScalar(1);
    }

    // Tentakel wippen
    for (let i = 0; i < this.tentacles.length; i++) {
      this.tentacles[i].rotation.z = Math.sin(this.waveTime * 2.2 + i * 0.9) * 0.25;
    }

    // Zum Spieler drehen
    const playerPos = game.player.body.position;
    const toPlayer = new THREE.Vector3().subVectors(playerPos, this.body.position);
    toPlayer.y = 0;
    if (toPlayer.length() > 0.1) {
      this.body.lookAt(
        this.body.position.x + toPlayer.x,
        this.body.position.y,
        this.body.position.z + toPlayer.z
      );
    }

    // Enrage unter 50% HP
    if (!this.enraged && this.health < MAX_HEALTH * ENRAGE_RATIO) {
      this.enraged = true;
      // Phase 2: Krake wird dunkelrot
      this.skinMat.color.set(0x8a2233);
      this.darkMat.color.set(0x551520);
      playSound('damage', 0.8);
    }
    const inkCd = this.enraged ? INK_COOLDOWN * 0.6 : INK_COOLDOWN;
    const pullCd = this.enraged ? PULL_COOLDOWN * 0.65 : PULL_COOLDOWN;

    // Tinte spucken
    this.inkTimer -= dt;
    if (this.inkTimer <= 0) {
      this.inkTimer = inkCd;
      this.spitInk(game);
    }

    // Tentakel-Griff
    if (this.pullState === 'idle') {
      this.pullTimer -= dt;
      if (this.pullTimer <= 0) {
        this.pullTimer = pullCd;
        this.startPullCharge(game);
      }
    } else {
      this.updatePullCharge(dt, game);
    }
    if (this.slamState === 'grab') {
      // Tentakel bleibt am Spieler haengen, solange er gezogen wird
      if (game.player.pullTime > 0) {
        const playerPos = game.player.body.position;
        this.slamChain.position.set(this.body.position.x, 3.2, this.body.position.z);
        this.slamChain.lookAt(playerPos.x, 1, playerPos.z);
        const dist = Math.max(1, Math.hypot(
          playerPos.x - this.body.position.x,
          playerPos.z - this.body.position.z
        ));
        this.slamChain.scale.set(1, 1, Math.min(dist / 5, 2.5));
      } else {
        // Zug vorbei -> Tentakel zieht sich zurueck
        this.slamRetractFrom = this.slamChain.scale.z;
        this.slamState = 'slam';
        this.slamTime = SLAM_TIME;
      }
    } else if (this.slamState === 'slam') {
      this.updateSlam(dt);
    }

    // Tentakel-Sweep
    this.updateSweep(dt, game);

    // Tinten-Blobs aktualisieren
    for (let i = this.inkBlobs.length - 1; i >= 0; i--) {
      const blob = this.inkBlobs[i];
      if (!blob.update(dt, game)) {
        this.inkBlobs.splice(i, 1);
        const puddle = new InkPuddle(
          blob.body.position,
          this.enraged ? INK_RADIUS + 0.5 : INK_RADIUS,
          INK_DURATION
        );
        game.scene.add(puddle.body);
        this.puddles.push(puddle);
        blob.dispose();
        playSound('explosion', 0.4);
      }
    }

    // Tintenpfützen aktualisieren
    for (let i = this.puddles.length - 1; i >= 0; i--) {
      const puddle = this.puddles[i];
      if (!puddle.update(dt, game)) {
        this.puddles.splice(i, 1);
        puddle.dispose();
      }
    }
  }

  private spitInk(game: Game) {
    const from = new THREE.Vector3(this.body.position.x, 3.0, this.body.position.z);
    const target = game.player.body.position.clone();
    target.y = 0;

    if (this.enraged) {
      const t2 = target.clone().add(
        new THREE.Vector3((Math.random() - 0.5) * 8, 0, (Math.random() - 0.5) * 8)
      );
      const blob2 = new InkBlob(from, t2);
      game.scene.add(blob2.body);
      this.inkBlobs.push(blob2);
    }

    const blob = new InkBlob(from, target);
    game.scene.add(blob.body);
    this.inkBlobs.push(blob);
    playSound('spawn', 0.5);
  }

  private startPullCharge(game: Game) {
    this.pullState = 'charge';
    this.pullChargeTime = PULL_CHARGE_TIME;
    this.markOffsetAngle = Math.random() * Math.PI * 2;
    const cx = this.body.position.x;
    const cz = this.body.position.z;
    for (let i = 0; i < PULL_MARK_COUNT; i++) {
      const a = this.markOffsetAngle + (i / PULL_MARK_COUNT) * Math.PI * 2;
      const mark = this.pullMarks[i];
      mark.group.position.set(
        cx + Math.cos(a) * PULL_MARK_DIST,
        0.06,
        cz + Math.sin(a) * PULL_MARK_DIST
      );
      mark.group.visible = true;
    }
    playSound('spawn', 0.8);
  }

  private updatePullCharge(dt: number, game: Game) {
    this.pullChargeTime -= dt;
    const pulse = Math.abs(Math.sin(this.waveTime * 9));
    for (const mark of this.pullMarks) {
      mark.ringMat.opacity = 0.3 + 0.5 * pulse;
      mark.discMat.opacity = 0.1 + 0.08 * pulse;
    }

    if (this.pullChargeTime <= 0) {
      this.pullState = 'idle';
      const playerPos = game.player.body.position;

      // Spieler in einer Marke? -> heranziehen
      let grabbed = false;
      for (const mark of this.pullMarks) {
        const dx = playerPos.x - mark.group.position.x;
        const dz = playerPos.z - mark.group.position.z;
        if (Math.hypot(dx, dz) < PULL_MARK_RADIUS) {
          grabbed = true;
          break;
        }
      }
      for (const mark of this.pullMarks) {
        mark.group.visible = false;
        mark.ringMat.opacity = 0;
        mark.discMat.opacity = 0;
      }

      if (grabbed && playerPos.y <= 0.8) {
        // Slam-Tentakel greift den Spieler und bleibt haengen
        this.slamChain.position.set(this.body.position.x, 3.2, this.body.position.z);
        this.slamChain.lookAt(playerPos.x, 1, playerPos.z);
        this.slamChain.scale.set(1, 1, 1);
        this.slamChain.visible = true;
        this.slamState = 'grab';

        game.player.damage(PULL_DAMAGE, this.body.position);
        const dir = new THREE.Vector3().subVectors(this.body.position, playerPos);
        dir.y = 0;
        if (dir.lengthSq() < 0.01) dir.set(0, 0, 1);
        dir.normalize();
        game.player.pullDir.copy(dir);
        game.player.pullTime = PULL_TIME;
        playSound('damage', 0.9);
      }
    }
  }

  private updateSlam(dt: number) {
    this.slamTime -= dt;
    const s = Math.max(0, this.slamTime / SLAM_TIME);
    this.slamChain.scale.set(1, 1, this.slamRetractFrom * s);

    if (this.slamTime <= 0) {
      this.slamChain.visible = false;
      this.slamState = 'none';
    }
  }

  private updateSweep(dt: number, game: Game) {
    if (!this.sweepActive) {
      this.sweepTimer -= dt;
      const cd = this.enraged ? 3.2 : 4.5;
      if (this.sweepTimer <= 0) {
        this.sweepTimer = cd;
        this.sweepActive = true;
        this.sweepHit = false;
        const start = Math.random() * Math.PI * 2;
        for (let i = 0; i < this.sweepTents.length; i++) {
          const tent = this.sweepTents[i];
          tent.angle = start + i * Math.PI;
          tent.progress = 0;
          tent.group.position.set(this.body.position.x, 0.06, this.body.position.z);
          // Tentakel liegt auf lokaler +X; rotation.y = -Winkel zeigt auf (cos, sin)
          tent.group.rotation.y = -tent.angle;
          tent.group.visible = i === 0 || this.enraged;
        }
        playSound('spawn', 0.6);
      }
      return;
    }

    const rotSpeed = ((Math.PI * 2) / (this.enraged ? 3.0 : SWEEP_DURATION)) * dt;

    for (const tent of this.sweepTents) {
      // Phase 2: zweiter Tentakel kreist gegensinnig
      if (tent.dir === -1 && !this.enraged) {
        tent.group.visible = false;
        continue;
      }
      tent.angle += tent.dir * rotSpeed;
      tent.progress += rotSpeed;
      tent.group.rotation.y = -tent.angle;
      if (!this.sweepHit) {
        const playerPos = game.player.body.position;
        const dx = playerPos.x - this.body.position.x;
        const dz = playerPos.z - this.body.position.z;
        const dist = Math.hypot(dx, dz);
        if (dist > 0.5 && dist < SWEEP_RADIUS + 0.5) {
          const dirX = Math.cos(tent.angle);
          const dirZ = Math.sin(tent.angle);
          // Abstand des Spielers zur Tentakel-Linie (radial vom Boss)
          const perp = Math.abs(dx * dirZ - dz * dirX);
          const along = dx * dirX + dz * dirZ;
          // Ueberspringbar: nur Treffer, solange der Spieler am Boden ist
          if (along > 0.3 && perp < SWEEP_HIT_WIDTH && playerPos.y <= 0.6) {
            this.sweepHit = true;
            game.player.damage(SWEEP_DAMAGE, this.body.position);
            playSound('damage', 0.8);
          }
        }
      }
    }

    if (this.sweepTents.every(t => t.progress >= Math.PI * 2)) {
      this.sweepActive = false;
      for (const tent of this.sweepTents) {
        tent.group.visible = false;
      }
    }
  }

  override takeDamage(
    damage: number,
    game: Game,
    withKnockback = true,
    sourcePos?: THREE.Vector3
  ) {
    super.takeDamage(damage, game, withKnockback, sourcePos);
    this.hitFlash = HIT_FLASH_TIME;
  }

  protected onDeath(_game: Game) {
    this.cleanupEffects();
    this.beginFadeDeath();
  }

  override dispose() {
    super.dispose();
    this.cleanupEffects();
  }

  private cleanupEffects() {
    for (const blob of this.inkBlobs) {
      blob.dispose();
    }
    this.inkBlobs = [];
    for (const puddle of this.puddles) {
      puddle.dispose();
    }
    this.puddles = [];
    if (this.game) {
      for (const mark of this.pullMarks) {
        this.game.scene.remove(mark.group);
      }
      this.game.scene.remove(this.slamChain);
      for (const tent of this.sweepTents) {
        this.game.scene.remove(tent.group);
      }
    }
    for (const mark of this.pullMarks) {
      for (const child of mark.group.children) {
        if (child instanceof THREE.Mesh) {
          child.geometry.dispose();
          (child.material as THREE.Material).dispose();
        }
      }
    }
    this.pullMarks = [];
    for (const tent of this.sweepTents) {
      for (const child of tent.group.children) {
        if (child instanceof THREE.Mesh) {
          child.geometry.dispose();
          (child.material as THREE.Material).dispose();
        }
      }
    }
    for (const child of this.slamChain.children) {
      if (child instanceof THREE.Mesh) {
        child.geometry.dispose();
        (child.material as THREE.Material).dispose();
      }
    }
  }
}