game.js

import * as THREE from 'three';
import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';

// 게임 상태 추적 변수
let gameCanStart = false;
let gameStarted = false;

// 게임 상수
const GAME_CONSTANTS = {
    MISSION_DURATION: 180,
    MAP_SIZE: 15000,
    MAX_ALTITUDE: 15000,
    MIN_ALTITUDE: 0,
    MAX_SPEED: 800,
    STALL_SPEED: 300, // 300kt 이하에서 스톨 위험
    GRAVITY: 9.8,
    MOUSE_SENSITIVITY: 0.001,
    MAX_G_FORCE: 12.0,
    ENEMY_COUNT: 4,
    MISSILE_COUNT: 6,
    AMMO_COUNT: 300
};

// 전투기 클래스
class Fighter {
    constructor() {
        this.mesh = null;
        this.isLoaded = false;
        
        // 물리 속성
        this.position = new THREE.Vector3(0, 2000, 0);
        this.velocity = new THREE.Vector3(0, 0, 350); // 초기 속도 350kt
        this.acceleration = new THREE.Vector3(0, 0, 0);
        this.rotation = new THREE.Euler(0, 0, 0);
        
        // 비행 제어
        this.throttle = 0.6; // 초기 스로틀 60%
        this.speed = 350; // 초기 속도 350kt
        this.altitude = 2000;
        this.gForce = 1.0;
        this.health = 100;
        
        // 조종 입력 시스템
        this.pitchInput = 0;
        this.rollInput = 0;
        this.yawInput = 0;
        
        // 마우스 누적 입력
        this.mousePitch = 0;
        this.mouseRoll = 0;
        
        // 부드러운 회전을 위한 목표값
        this.targetPitch = 0;
        this.targetRoll = 0;
        this.targetYaw = 0;
        
        // 무기
        this.missiles = GAME_CONSTANTS.MISSILE_COUNT;
        this.ammo = GAME_CONSTANTS.AMMO_COUNT;
        this.bullets = [];
        this.lastShootTime = 0;
        
        // 스톨 탈출을 위한 F키 상태
        this.escapeKeyPressed = false;
        
        // 카메라 설정
        this.cameraDistance = 250;
        this.cameraHeight = 30;
        this.cameraLag = 0.06;
        
        // 경고 시스템
        this.altitudeWarning = false;
        this.stallWarning = false;
        this.warningBlinkTimer = 0;
        this.warningBlinkState = false;
        
        // Over-G 시스템
        this.overG = false;
        this.maxGForce = 9.0;
        this.overGTimer = 0; // Over-G 지속 시간
        
        // 경고음 시스템
        this.warningAudios = {
            altitude: null,
            pullup: null,
            overg: null,
            stall: null,
            normal: null // 엔진 소리 추가
        };
        this.initializeWarningAudios();
    }
    
    initializeWarningAudios() {
        try {
            this.warningAudios.altitude = new Audio('sounds/altitude.ogg');
            this.warningAudios.altitude.volume = 0.75;
            
            this.warningAudios.pullup = new Audio('sounds/pullup.ogg');
            this.warningAudios.pullup.volume = 0.9;
            
            this.warningAudios.overg = new Audio('sounds/overg.ogg');
            this.warningAudios.overg.volume = 0.75;
            
            this.warningAudios.stall = new Audio('sounds/alert.ogg');
            this.warningAudios.stall.volume = 0.75;
            
            // 엔진 소리 설정
            this.warningAudios.normal = new Audio('sounds/normal.ogg');
            this.warningAudios.normal.volume = 0.5;
            this.warningAudios.normal.loop = true; // 엔진 소리는 계속 반복
            
            // 경고음에만 ended 이벤트 리스너 추가 (엔진 소리 제외)
            Object.keys(this.warningAudios).forEach(key => {
                if (key !== 'normal' && this.warningAudios[key]) {
                    this.warningAudios[key].addEventListener('ended', () => {
                        this.updateWarningAudios();
                    });
                }
            });
        } catch (e) {
            console.log('Warning audio initialization failed:', e);
        }
    }
    
    startEngineSound() {
        // 엔진 소리 시작
        if (this.warningAudios.normal) {
            this.warningAudios.normal.play().catch(e => {
                console.log('Engine sound failed to start:', e);
            });
        }
    }
    
    updateWarningAudios() {
        let currentWarning = null;
        
        if (this.altitude < 250) {
            currentWarning = 'pullup';
        }
        else if (this.altitude < 500) {
            currentWarning = 'altitude';
        }
        else if (this.overG) {
            currentWarning = 'overg';
        }
        else if (this.stallWarning) {
            currentWarning = 'stall';
        }
        
        // 경고음만 관리 (엔진 소리는 제외)
        Object.keys(this.warningAudios).forEach(key => {
            if (key !== 'normal' && key !== currentWarning && this.warningAudios[key] && !this.warningAudios[key].paused) {
                this.warningAudios[key].pause();
                this.warningAudios[key].currentTime = 0;
            }
        });
        
        if (currentWarning && this.warningAudios[currentWarning]) {
            if (this.warningAudios[currentWarning].paused) {
                this.warningAudios[currentWarning].play().catch(e => {});
            }
        }
    }
    
    stopAllWarningAudios() {
        // 모든 오디오 정지 (엔진 소리 포함)
        Object.values(this.warningAudios).forEach(audio => {
            if (audio && !audio.paused) {
                audio.pause();
                audio.currentTime = 0;
            }
        });
    }

    async initialize(scene, loader) {
        try {
            const result = await loader.loadAsync('models/f-15.glb');
            this.mesh = result.scene;
            this.mesh.position.copy(this.position);
            this.mesh.scale.set(2, 2, 2);
            this.mesh.rotation.y = Math.PI / 4;
            
            this.mesh.traverse((child) => {
                if (child.isMesh) {
                    child.castShadow = true;
                    child.receiveShadow = true;
                }
            });
            
            scene.add(this.mesh);
            this.isLoaded = true;
            console.log('F-15 전투기 로딩 완료');
        } catch (error) {
            console.error('F-15 모델 로딩 실패:', error);
            this.createFallbackModel(scene);
        }
    }

    createFallbackModel(scene) {
        const group = new THREE.Group();
        
        const fuselageGeometry = new THREE.CylinderGeometry(0.8, 1.5, 12, 8);
        const fuselageMaterial = new THREE.MeshLambertMaterial({ color: 0x606060 });
        const fuselage = new THREE.Mesh(fuselageGeometry, fuselageMaterial);
        fuselage.rotation.x = Math.PI / 2;
        group.add(fuselage);
        
        const wingGeometry = new THREE.BoxGeometry(16, 0.3, 4);
        const wingMaterial = new THREE.MeshLambertMaterial({ color: 0x404040 });
        const wings = new THREE.Mesh(wingGeometry, wingMaterial);
        wings.position.z = -1;
        group.add(wings);
        
        const tailGeometry = new THREE.BoxGeometry(0.3, 4, 3);
        const tailMaterial = new THREE.MeshLambertMaterial({ color: 0x404040 });
        const tail = new THREE.Mesh(tailGeometry, tailMaterial);
        tail.position.z = -5;
        tail.position.y = 1.5;
        group.add(tail);
        
        const horizontalTailGeometry = new THREE.BoxGeometry(6, 0.2, 2);
        const horizontalTail = new THREE.Mesh(horizontalTailGeometry, tailMaterial);
        horizontalTail.position.z = -5;
        horizontalTail.position.y = 0.5;
        group.add(horizontalTail);
        
        this.mesh = group;
        this.mesh.position.copy(this.position);
        this.mesh.scale.set(2, 2, 2);
        scene.add(this.mesh);
        this.isLoaded = true;
        
        console.log('Fallback 전투기 모델 생성 완료');
    }

    updateMouseInput(deltaX, deltaY) {
        const sensitivity = GAME_CONSTANTS.MOUSE_SENSITIVITY * 1.0;
        
        // 마우스 Y축: 피치(기수 상하)
        this.targetPitch -= deltaY * sensitivity;
        
        // 마우스 X축: 요(Yaw) - 몸체를 좌우로 회전
        this.targetYaw += deltaX * sensitivity * 0.8; // 요 회전 감도 조정
        
        // 요 회전에 따른 자동 롤 (뱅크 턴)
        // 좌우로 회전할 때 자연스럽게 날개가 기울어짐
        const yawRate = deltaX * sensitivity * 0.8;
        this.targetRoll = -yawRate * 15; // 요 회전량에 비례하여 롤 발생
        
        // 각도 제한
        const maxPitchAngle = Math.PI / 3; // 60도
        const maxRollAngle = Math.PI * 0.5; // 90도로 제한 (자동 롤)
        
        this.targetPitch = Math.max(-maxPitchAngle, Math.min(maxPitchAngle, this.targetPitch));
        
        // 자동 롤은 제한된 범위 내에서만 작동
        if (Math.abs(this.targetRoll) < maxRollAngle) {
            // 롤 각도 제한 적용
            this.targetRoll = Math.max(-maxRollAngle, Math.min(maxRollAngle, this.targetRoll));
        }
    }

    updateControls(keys, deltaTime) {
        // W/S: 스로틀만 제어 (가속/감속)
        if (keys.w) {
            this.throttle = Math.min(1.0, this.throttle + deltaTime * 0.5); // 천천히 가속
        }
        if (keys.s) {
            this.throttle = Math.max(0.1, this.throttle - deltaTime * 0.5); // 천천히 감속
        }
        
        // A/D: 보조 요 제어 (러더) - 선택적 사용
        if (keys.a) {
            this.targetYaw -= deltaTime * 0.4; // 감소된 러더 효과
        }
        if (keys.d) {
            this.targetYaw += deltaTime * 0.4; // 감소된 러더 효과
        }
    }

    updatePhysics(deltaTime) {
        if (!this.mesh) return;
        
        // 부드러운 회전 보간
        const rotationSpeed = deltaTime * 2.0;
        this.rotation.x = THREE.MathUtils.lerp(this.rotation.x, this.targetPitch, rotationSpeed);
        this.rotation.y = THREE.MathUtils.lerp(this.rotation.y, this.targetYaw, rotationSpeed);
        
        // 롤 자동 복귀 시스템
        if (Math.abs(this.targetYaw - this.rotation.y) < 0.05) {
            // 요 회전이 거의 없을 때 롤을 0으로 복귀
            this.targetRoll *= 0.95;
        }
        
        this.rotation.z = THREE.MathUtils.lerp(this.rotation.z, this.targetRoll, rotationSpeed * 1.5); // 롤은 더 빠르게 반응
        
        // 워썬더 스타일: 요 회전이 주도적, 롤은 보조적
        // 롤에 따른 추가 요 회전은 제거하거나 최소화
        let bankTurnRate = 0;
        if (Math.abs(this.rotation.z) > 0.3) { // 롤이 충분히 클 때만
            const bankAngle = this.rotation.z;
            bankTurnRate = Math.sin(bankAngle) * deltaTime * 0.1; // 매우 작은 선회율
            this.targetYaw += bankTurnRate;
        }
        
        // 현실적인 속도 계산
        const minSpeed = 0; // 최소 속도 0kt
        const maxSpeed = 600; // 최대 속도 600kt
        let targetSpeed = minSpeed + (maxSpeed - minSpeed) * this.throttle;
        
        // 피치 각도에 따른 속도 변화
        const pitchAngle = this.rotation.x;
        const pitchDegrees = Math.abs(pitchAngle) * (180 / Math.PI);
        
        // 기수가 위를 향하고 있을 경우 빠른 속도 감소
        if (pitchAngle < -0.1 && !this.stallWarning) { // 스톨이 아닐 때만 상승으로 인한 감속
            const climbFactor = Math.abs(pitchAngle) / (Math.PI / 2); // 90도 기준
            if (pitchDegrees > 30) { // 30도 이상일 때 급격한 감속
                targetSpeed *= Math.max(0, 1 - climbFactor * 1.5); // 최대 150% 감속 (0kt까지)
            } else {
                targetSpeed *= (1 - climbFactor * 0.3); // 정상적인 감속
            }
        } else if (pitchAngle > 0.1) { // 기수가 아래로 (하강) - 스톨 상태에서도 적용
            const diveFactor = pitchAngle / (Math.PI / 3);
            targetSpeed *= (1 + diveFactor * 0.4); // 하강 시 가속 증가 (0.2 -> 0.4)
        }
        
        // G-Force 계산 개선
        const turnRate = Math.abs(bankTurnRate) * 100;
        const pitchRate = Math.abs(this.rotation.x - this.targetPitch) * 10;
        
        // 고도에 따른 G-Force 증가 배율 계산
        const altitudeInKm = this.position.y / 1000; // 미터를 킬로미터로 변환
        const altitudeMultiplier = 1 + (altitudeInKm * 0.2); // 1km당 20% 증가
        
        // 비정상적인 자세에 의한 G-Force 추가
        let abnormalG = 0;
        
        // 뒤집힌 상태 (롤이 90도 이상)
        const isInverted = Math.abs(this.rotation.z) > Math.PI / 2;
        if (isInverted) {
            abnormalG += (3.0 + Math.abs(Math.abs(this.rotation.z) - Math.PI / 2) * 2) * altitudeMultiplier; // 고도 배율 적용
        }
        
        // 기수가 계속 위를 향하고 있는 경우 (피치가 -30도 이하)
        if (pitchAngle < -Math.PI / 6) {
            abnormalG += (2.0 + Math.abs(pitchAngle + Math.PI / 6) * 3) * altitudeMultiplier; // 고도 배율 적용
        }
        
        // 기수가 과도하게 아래를 향하고 있는 경우 (피치가 60도 이상)
        if (pitchAngle > Math.PI / 3) {
            abnormalG += (2.0 + Math.abs(pitchAngle - Math.PI / 3) * 3) * altitudeMultiplier; // 고도 배율 적용
        }
        
        // 급격한 기동에 의한 G-Force
        const maneuverG = turnRate + pitchRate + (Math.abs(this.rotation.z) * 3);
        
        // 총 G-Force 계산
        this.gForce = 1.0 + maneuverG + abnormalG;
        
        // 정상 자세로 돌아오면 G-Force 자연스럽게 감소
        if (!isInverted && pitchAngle > -Math.PI / 6 && pitchAngle < Math.PI / 6) {
            // 정상 자세일 때 G-Force를 부드럽게 감소
            this.gForce = THREE.MathUtils.lerp(this.gForce, 1.0 + maneuverG, deltaTime * 2.0);
        }
        
        this.overG = this.gForce > this.maxGForce;
        
        // Over-G 타이머 업데이트
        if (this.overG) {
            this.overGTimer += deltaTime;
            
            // 3초 이상 Over-G 상태일 경우
            if (this.overGTimer > 3.0) {
                // 속도 급격히 감소 (0kt까지)
                targetSpeed *= Math.max(0, 1 - (this.overGTimer - 3.0) * 0.5);
                
                // 시야 흐림 효과는 UI에서 처리
            }
        } else {
            this.overGTimer = 0; // Over-G 상태가 아니면 타이머 리셋
        }
        
        // 스톨 경고: 300kt 이하에서 스톨 위험
        const speedKnots = this.speed * 1.94384; // m/s to knots
        const wasStalling = this.stallWarning;
        
        // 스톨 진입 조건
        if (!this.stallWarning && speedKnots < GAME_CONSTANTS.STALL_SPEED) {
            this.stallWarning = true;
        }
        
        // 스톨 탈출 조건: F키를 누르고 있고, 기수가 아래를 향하고 있고, 속도가 충분할 때
        if (this.stallWarning && this.escapeKeyPressed && pitchAngle > 0.2 && speedKnots > GAME_CONSTANTS.STALL_SPEED + 50) {
            // F키를 누르고 있을 때만 스톨 탈출
            this.stallWarning = false;
        }
        
        // 속도 변화 적용
        if (this.stallWarning) {
            // 스톨 상태에서의 속도 변화
            if (pitchAngle > 0.1) { // 기수가 아래를 향할 때
                // 다이빙으로 인한 속도 증가
                const diveSpeedGain = Math.min(pitchAngle * 300, 200); // 최대 200m/s 증가
                this.speed = Math.min(maxSpeed, this.speed + diveSpeedGain * deltaTime);
            } else {
                // 기수가 위를 향하거나 수평일 때는 속도 감소
                this.speed = Math.max(0, this.speed - deltaTime * 100);
            }
        } else {
            // 정상 비행 시 속도 변화
            this.speed = THREE.MathUtils.lerp(this.speed, targetSpeed, deltaTime * 0.5);
        }
        
        // 스톨 상태에서의 물리 효과
        if (this.stallWarning) {
            // 바닥으로 추락하며 가속도가 빠르게 붙음
            this.targetPitch = Math.min(Math.PI / 3, this.targetPitch + deltaTime * 2.0); // 기수가 빠르게 아래로
            
            // 조종 불능 상태
            this.rotation.x += (Math.random() - 0.5) * deltaTime * 0.5;
            this.rotation.z += (Math.random() - 0.5) * deltaTime * 0.5;
            
            // 중력에 의한 가속
            const gravityAcceleration = GAME_CONSTANTS.GRAVITY * deltaTime * 3.0; // 3배 중력
            this.velocity.y -= gravityAcceleration;
        }
        
        // 속도 벡터 계산
        const noseDirection = new THREE.Vector3(0, 0, 1);
        noseDirection.applyEuler(this.rotation);
        
        if (!this.stallWarning) {
            // 정상 비행 시
            this.velocity = noseDirection.multiplyScalar(this.speed);
        } else {
            // 스톨 시에는 중력이 주도적이지만 다이빙 속도도 반영
            this.velocity.x = noseDirection.x * this.speed * 0.5; // 전방 속도 증가
            this.velocity.z = noseDirection.z * this.speed * 0.5;
            // y 속도는 위에서 중력으로 처리됨
        }
        
        // 정상 비행 시 중력 효과
        if (!this.stallWarning) {
            const gravityEffect = GAME_CONSTANTS.GRAVITY * deltaTime * 0.15;
            this.velocity.y -= gravityEffect;
            
            // 양력 효과 (속도에 비례)
            const liftFactor = (this.speed / maxSpeed) * 0.8;
            const lift = gravityEffect * liftFactor;
            this.velocity.y += lift;
        }
        
        // 위치 업데이트
        this.position.add(this.velocity.clone().multiplyScalar(deltaTime));
        
        // 지면 충돌
        if (this.position.y <= GAME_CONSTANTS.MIN_ALTITUDE) {
            this.position.y = GAME_CONSTANTS.MIN_ALTITUDE;
            this.health = 0;
            return;
        }
        
        // 최대 고도 제한
        if (this.position.y > GAME_CONSTANTS.MAX_ALTITUDE) {
            this.position.y = GAME_CONSTANTS.MAX_ALTITUDE;
            this.altitudeWarning = true;
            if (this.velocity.y > 0) this.velocity.y = 0;
        } else {
            this.altitudeWarning = false;
        }
        
        // 맵 경계 처리
        const mapLimit = GAME_CONSTANTS.MAP_SIZE / 2;
        if (this.position.x > mapLimit) this.position.x = -mapLimit;
        if (this.position.x < -mapLimit) this.position.x = mapLimit;
        if (this.position.z > mapLimit) this.position.z = -mapLimit;
        if (this.position.z < -mapLimit) this.position.z = mapLimit;
        
        // 메시 위치 및 회전 업데이트
        this.mesh.position.copy(this.position);
        this.mesh.rotation.x = this.rotation.x;
        this.mesh.rotation.y = this.rotation.y + 3 * Math.PI / 2;
        this.mesh.rotation.z = this.rotation.z;
        
        // 경고 깜빡임 타이머
        this.warningBlinkTimer += deltaTime;
        if (this.warningBlinkTimer >= 1.0) {
            this.warningBlinkTimer = 0;
            this.warningBlinkState = !this.warningBlinkState;
        }
        
        // 고도 계산
        this.altitude = this.position.y;
        
        // 경고음 업데이트 (엔진 소리는 계속 유지)
        this.updateWarningAudios();
        
        // 엔진 소리 볼륨을 스로틀에 연동
        if (this.warningAudios.normal && !this.warningAudios.normal.paused) {
            this.warningAudios.normal.volume = 0.3 + this.throttle * 0.4; // 0.3~0.7
        }
    }

    shoot(scene) {
        const currentTime = Date.now();
        if (currentTime - this.lastShootTime < 100 || this.ammo <= 0) return;
        
        this.lastShootTime = currentTime;
        this.ammo--;
        
        const bulletGeometry = new THREE.SphereGeometry(0.2);
        const bulletMaterial = new THREE.MeshBasicMaterial({ 
            color: 0xffff00,
            emissive: 0xffff00,
            emissiveIntensity: 0.7
        });
        const bullet = new THREE.Mesh(bulletGeometry, bulletMaterial);
        
        const muzzleOffset = new THREE.Vector3(0, 0, 8);
        muzzleOffset.applyEuler(this.rotation);
        bullet.position.copy(this.position).add(muzzleOffset);
        
        const bulletSpeed = 1000;
        const direction = new THREE.Vector3(0, 0, 1);
        direction.applyEuler(this.rotation);
        bullet.velocity = direction.multiplyScalar(bulletSpeed).add(this.velocity);
        
        scene.add(bullet);
        this.bullets.push(bullet);
        
        try {
            const audio = new Audio('sounds/gunfire.ogg');
            if (audio) {
                audio.volume = 0.3;
                audio.play().catch(e => console.log('Gunfire sound failed to play'));
            }
        } catch (e) {}
    }

    updateBullets(scene, deltaTime) {
        for (let i = this.bullets.length - 1; i >= 0; i--) {
            const bullet = this.bullets[i];
            bullet.position.add(bullet.velocity.clone().multiplyScalar(deltaTime));
            
            if (bullet.position.distanceTo(this.position) > 8000 || 
                bullet.position.y < 0 || 
                bullet.position.y > GAME_CONSTANTS.MAX_ALTITUDE + 500) {
                scene.remove(bullet);
                this.bullets.splice(i, 1);
            }
        }
    }

    takeDamage(damage) {
        this.health -= damage;
        return this.health <= 0;
    }

    getCameraPosition() {
        const backward = new THREE.Vector3(0, 0, -1);
        const up = new THREE.Vector3(0, 1, 0);
        
        backward.applyEuler(this.rotation);
        up.applyEuler(this.rotation);
        
        const cameraPosition = this.position.clone()
            .add(backward.multiplyScalar(this.cameraDistance))
            .add(up.multiplyScalar(this.cameraHeight));
        
        return cameraPosition;
    }

    getCameraTarget() {
        return this.position.clone();
    }
}

// 적 전투기 클래스
class EnemyFighter {
    constructor(scene, position) {
        this.mesh = null;
        this.isLoaded = false;
        this.scene = scene;
        this.position = position.clone();
        this.velocity = new THREE.Vector3(0, 0, 120);
        this.rotation = new THREE.Euler(0, 0, 0);
        this.health = 100;
        this.speed = 120;
        this.bullets = [];
        this.lastShootTime = 0;
        
        this.aiState = 'patrol';
        this.targetPosition = position.clone();
        this.patrolCenter = position.clone();
        this.patrolRadius = 2000;
        this.lastStateChange = 0;
    }

    async initialize(loader) {
        try {
            const result = await loader.loadAsync('models/mig-29.glb');
            this.mesh = result.scene;
            this.mesh.position.copy(this.position);
            this.mesh.scale.set(1.5, 1.5, 1.5);
            this.mesh.rotation.y = 3 * Math.PI / 2;
            
            this.mesh.traverse((child) => {
                if (child.isMesh) {
                    child.castShadow = true;
                    child.receiveShadow = true;
                }
            });
            
            this.scene.add(this.mesh);
            this.isLoaded = true;
            console.log('MiG-29 적기 로딩 완료');
        } catch (error) {
            console.error('MiG-29 모델 로딩 실패:', error);
            this.createFallbackModel();
        }
    }

    createFallbackModel() {
        const group = new THREE.Group();
        
        const fuselageGeometry = new THREE.CylinderGeometry(0.6, 1.0, 8, 8);
        const fuselageMaterial = new THREE.MeshLambertMaterial({ color: 0x800000 });
        const fuselage = new THREE.Mesh(fuselageGeometry, fuselageMaterial);
        fuselage.rotation.x = -Math.PI / 2;
        group.add(fuselage);
        
        const wingGeometry = new THREE.BoxGeometry(12, 0.3, 3);
        const wingMaterial = new THREE.MeshLambertMaterial({ color: 0x600000 });
        const wings = new THREE.Mesh(wingGeometry, wingMaterial);
        wings.position.z = -0.5;
        group.add(wings);
        
        this.mesh = group;
        this.mesh.position.copy(this.position);
        this.mesh.scale.set(1.5, 1.5, 1.5);
        this.scene.add(this.mesh);
        this.isLoaded = true;
        
        console.log('Fallback 적기 모델 생성 완료');
    }

    update(playerPosition, deltaTime) {
        if (!this.mesh || !this.isLoaded) return;
        
        const currentTime = Date.now();
        const distanceToPlayer = this.position.distanceTo(playerPosition);
        
        if (distanceToPlayer < 5000) {
            const direction = new THREE.Vector3()
                .subVectors(playerPosition, this.position)
                .normalize();
            
            this.velocity = direction.multiplyScalar(this.speed);
            this.rotation.y = Math.atan2(direction.x, direction.z);
            
            if (distanceToPlayer < 2000 && currentTime - this.lastShootTime > 1500) {
                this.shoot();
            }
        } else {
            if (this.position.distanceTo(this.targetPosition) < 300) {
                const angle = Math.random() * Math.PI * 2;
                this.targetPosition = this.patrolCenter.clone().add(
                    new THREE.Vector3(
                        Math.cos(angle) * this.patrolRadius,
                        (Math.random() - 0.5) * 1000,
                        Math.sin(angle) * this.patrolRadius
                    )
                );
            }
            
            const direction = new THREE.Vector3()
                .subVectors(this.targetPosition, this.position)
                .normalize();
            
            this.velocity = direction.multiplyScalar(this.speed * 0.7);
            this.rotation.y = Math.atan2(direction.x, direction.z);
        }
        
        this.position.add(this.velocity.clone().multiplyScalar(deltaTime));
        
        if (this.position.y < GAME_CONSTANTS.MIN_ALTITUDE) {
            this.position.y = GAME_CONSTANTS.MIN_ALTITUDE;
        }
        if (this.position.y > GAME_CONSTANTS.MAX_ALTITUDE) {
            this.position.y = GAME_CONSTANTS.MAX_ALTITUDE;
        }
        
        const mapLimit = GAME_CONSTANTS.MAP_SIZE / 2;
        if (this.position.x > mapLimit) this.position.x = -mapLimit;
        if (this.position.x < -mapLimit) this.position.x = mapLimit;
        if (this.position.z > mapLimit) this.position.z = -mapLimit;
        if (this.position.z < -mapLimit) this.position.z = mapLimit;
        
        this.mesh.position.copy(this.position);
        this.mesh.rotation.x = this.rotation.x;
        this.mesh.rotation.y = this.rotation.y + 3 * Math.PI / 2;
        this.mesh.rotation.z = this.rotation.z;
        
        this.updateBullets(deltaTime);
    }

    shoot() {
        this.lastShootTime = Date.now();
        
        const bulletGeometry = new THREE.SphereGeometry(0.15);
        const bulletMaterial = new THREE.MeshBasicMaterial({ 
            color: 0xff0000,
            emissive: 0xff0000,
            emissiveIntensity: 0.5
        });
        const bullet = new THREE.Mesh(bulletGeometry, bulletMaterial);
        
        const muzzleOffset = new THREE.Vector3(0, 0, 6);
        muzzleOffset.applyEuler(this.rotation);
        bullet.position.copy(this.position).add(muzzleOffset);
        
        const direction = new THREE.Vector3(0, 0, 1);
        direction.applyEuler(this.rotation);
        bullet.velocity = direction.multiplyScalar(800);
        
        this.scene.add(bullet);
        this.bullets.push(bullet);
    }

    updateBullets(deltaTime) {
        for (let i = this.bullets.length - 1; i >= 0; i--) {
            const bullet = this.bullets[i];
            bullet.position.add(bullet.velocity.clone().multiplyScalar(deltaTime));
            
            if (bullet.position.distanceTo(this.position) > 5000 || 
                bullet.position.y < 0) {
                this.scene.remove(bullet);
                this.bullets.splice(i, 1);
            }
        }
    }

    takeDamage(damage) {
        this.health -= damage;
        return this.health <= 0;
    }

    destroy() {
        if (this.mesh) {
            this.scene.remove(this.mesh);
            this.bullets.forEach(bullet => this.scene.remove(bullet));
            this.bullets = [];
            this.isLoaded = false;
        }
    }
}

// 메인 게임 클래스
class Game {
    constructor() {
        this.scene = new THREE.Scene();
        this.camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 50000);
        this.renderer = new THREE.WebGLRenderer({ antialias: true });
        this.renderer.setSize(window.innerWidth, window.innerHeight);
        this.renderer.shadowMap.enabled = true;
        this.renderer.shadowMap.type = THREE.PCFSoftShadowMap;
        this.renderer.setClearColor(0x87CEEB);
        this.renderer.setPixelRatio(window.devicePixelRatio);
        
        document.getElementById('gameContainer').appendChild(this.renderer.domElement);
        
        this.loader = new GLTFLoader();
        this.fighter = new Fighter();
        this.enemies = [];
        this.isLoaded = false;
        this.isBGMReady = false;
        this.isGameOver = false;
        this.gameTime = GAME_CONSTANTS.MISSION_DURATION;
        this.score = 0;
        this.lastTime = performance.now();
        this.gameTimer = null;
        this.animationFrameId = null;
        
        this.bgm = null;
        this.bgmPlaying = false;
        
        this.keys = { w: false, a: false, s: false, d: false, f: false };
        this.isStarted = false;
        
        this.setupScene();
        this.setupEventListeners();
        this.preloadGame();
    }

    async preloadGame() {
        try {
            console.log('게임 리소스 사전 로딩 중...');
            
            await this.fighter.initialize(this.scene, this.loader);
            
            if (!this.fighter.isLoaded) {
                throw new Error('전투기 로딩 실패');
            }
            
            await this.preloadEnemies();
            
            this.isLoaded = true;
            console.log('게임 리소스 로딩 완료');
            
            await this.preloadBGM();
            
            this.showStartScreen();
            
            this.animate();
            
        } catch (error) {
            console.error('게임 사전 로딩 실패:', error);
            document.getElementById('loading').innerHTML = 
                '<div class="loading-text" style="color: red;">로딩 실패. 페이지를 새로고침해주세요.</div>';
        }
    }

    showStartScreen() {
        if (this.isLoaded && this.isBGMReady) {
            const loadingElement = document.getElementById('loading');
            if (loadingElement) {
                loadingElement.style.display = 'none';
            }
            
            const startScreen = document.getElementById('startScreen');
            if (startScreen) {
                startScreen.style.display = 'flex';
            }
            
            window.dispatchEvent(new Event('gameReady'));
            
            console.log('모든 리소스 준비 완료 - Start Game 버튼 표시');
        }
    }

    async preloadBGM() {
        console.log('BGM 사전 로딩...');
        
        return new Promise((resolve) => {
            try {
                this.bgm = new Audio('sounds/main.ogg');
                this.bgm.volume = 0.25;
                this.bgm.loop = true;
                
                this.bgm.addEventListener('canplaythrough', () => {
                    console.log('BGM 재생 준비 완료');
                    this.isBGMReady = true;
                    resolve();
                });
                
                this.bgm.addEventListener('error', (e) => {
                    console.log('BGM 에러:', e);
                    this.isBGMReady = true;
                    resolve();
                });
                
                this.bgm.load();
                
                setTimeout(() => {
                    if (!this.isBGMReady) {
                        console.log('BGM 로딩 타임아웃 - 게임 진행');
                        this.isBGMReady = true;
                        resolve();
                    }
                }, 3000);
                
            } catch (error) {
                console.log('BGM 사전 로딩 실패:', error);
                this.isBGMReady = true;
                resolve();
            }
        });
    }

    async preloadEnemies() {
        for (let i = 0; i < GAME_CONSTANTS.ENEMY_COUNT; i++) {
            const angle = (i / GAME_CONSTANTS.ENEMY_COUNT) * Math.PI * 2;
            const distance = 6000 + Math.random() * 3000;
            
            const position = new THREE.Vector3(
                Math.cos(angle) * distance,
                2500 + Math.random() * 2000,
                Math.sin(angle) * distance
            );
            
            const enemy = new EnemyFighter(this.scene, position);
            await enemy.initialize(this.loader);
            this.enemies.push(enemy);
        }
    }

    setupScene() {
        this.scene.background = new THREE.Color(0x87CEEB);
        this.scene.fog = new THREE.Fog(0x87CEEB, 1000, 30000);
        
        const ambientLight = new THREE.AmbientLight(0xffffff, 0.6);
        this.scene.add(ambientLight);
        
        const directionalLight = new THREE.DirectionalLight(0xffffff, 1.0);
        directionalLight.position.set(8000, 10000, 8000);
        directionalLight.castShadow = true;
        directionalLight.shadow.mapSize.width = 2048;
        directionalLight.shadow.mapSize.height = 2048;
        directionalLight.shadow.camera.near = 0.5;
        directionalLight.shadow.camera.far = 20000;
        directionalLight.shadow.camera.left = -10000;
        directionalLight.shadow.camera.right = 10000;
        directionalLight.shadow.camera.top = 10000;
        directionalLight.shadow.camera.bottom = -10000;
        this.scene.add(directionalLight);
        
        const groundGeometry = new THREE.PlaneGeometry(GAME_CONSTANTS.MAP_SIZE, GAME_CONSTANTS.MAP_SIZE);
        const groundMaterial = new THREE.MeshLambertMaterial({ 
            color: 0x8FBC8F,
            transparent: true,
            opacity: 0.8
        });
        const ground = new THREE.Mesh(groundGeometry, groundMaterial);
        ground.rotation.x = -Math.PI / 2;
        ground.receiveShadow = true;
        this.scene.add(ground);
        
        this.addClouds();
    }

    addClouds() {
        const cloudGeometry = new THREE.SphereGeometry(100, 8, 6);
        const cloudMaterial = new THREE.MeshLambertMaterial({ 
            color: 0xffffff, 
            transparent: true, 
            opacity: 0.5 
        });
        
        for (let i = 0; i < 100; i++) {
            const cloud = new THREE.Mesh(cloudGeometry, cloudMaterial);
            cloud.position.set(
                (Math.random() - 0.5) * GAME_CONSTANTS.MAP_SIZE,
                Math.random() * 4000 + 1000,
                (Math.random() - 0.5) * GAME_CONSTANTS.MAP_SIZE
            );
            cloud.scale.set(
                Math.random() * 3 + 1,
                Math.random() * 2 + 0.5,
                Math.random() * 3 + 1
            );
            this.scene.add(cloud);
        }
    }

    setupEventListeners() {
        document.addEventListener('keydown', (event) => {
            if (this.isGameOver || !gameStarted) return;
            
            switch(event.code) {
                case 'KeyW': this.keys.w = true; break;
                case 'KeyA': this.keys.a = true; break;
                case 'KeyS': this.keys.s = true; break;
                case 'KeyD': this.keys.d = true; break;
                case 'KeyF': this.keys.f = true; break;
            }
        });

        document.addEventListener('keyup', (event) => {
            if (this.isGameOver || !gameStarted) return;
            
            switch(event.code) {
                case 'KeyW': this.keys.w = false; break;
                case 'KeyA': this.keys.a = false; break;
                case 'KeyS': this.keys.s = false; break;
                case 'KeyD': this.keys.d = false; break;
                case 'KeyF': this.keys.f = false; break;
            }
        });

        document.addEventListener('mousemove', (event) => {
            if (!document.pointerLockElement || this.isGameOver || !gameStarted) return;
            
            const deltaX = event.movementX || 0;
            const deltaY = event.movementY || 0;
            
            this.fighter.updateMouseInput(deltaX, deltaY);
        });

        window.addEventListener('resize', () => {
            this.camera.aspect = window.innerWidth / window.innerHeight;
            this.camera.updateProjectionMatrix();
            this.renderer.setSize(window.innerWidth, window.innerHeight);
        });
    }

    startGame() {
        if (!this.isLoaded) {
            console.log('게임이 아직 로딩 중입니다...');
            return;
        }
        
        this.isStarted = true;
        this.startGameTimer();
        
        // 엔진 소리 시작
        this.fighter.startEngineSound();
        
        console.log('게임 시작!');
    }

    startBGM() {
        if (this.bgmPlaying || !this.bgm) return;
        
        console.log('BGM 재생 시도...');
        
        const playPromise = this.bgm.play();
        
        if (playPromise !== undefined) {
            playPromise.then(() => {
                this.bgmPlaying = true;
                console.log('BGM 재생 시작 성공!');
            }).catch(error => {
                console.log('자동 재생이 차단됨:', error);
                console.log('클릭 후 재생 시도 대기 중...');
                
                const tryPlayOnInteraction = () => {
                    if (!this.bgmPlaying && this.bgm) {
                        console.log('사용자 상호작용으로 BGM 재생 시도...');
                        this.bgm.play().then(() => {
                            this.bgmPlaying = true;
                            console.log('BGM 재생 시작 성공 (클릭 후)!');
                            document.removeEventListener('click', tryPlayOnInteraction);
                            document.removeEventListener('keydown', tryPlayOnInteraction);
                        }).catch(e => console.log('BGM 재생 실패:', e));
                    }
                };
                
                document.addEventListener('click', tryPlayOnInteraction);
                document.addEventListener('keydown', tryPlayOnInteraction);
            });
        }
    }

    startGameTimer() {
        this.gameTimer = setInterval(() => {
            if (!this.isGameOver) {
                this.gameTime--;
                
                if (this.gameTime <= 0) {
                    this.endGame(true);
                }
            }
        }, 1000);
    }

    updateUI() {
        if (this.fighter.isLoaded) {
            const speedKnots = Math.round(this.fighter.speed * 1.94384);
            const altitudeFeet = Math.round(this.fighter.altitude * 3.28084);
            const altitudeMeters = Math.round(this.fighter.altitude);
            
            const scoreElement = document.getElementById('score');
            const timeElement = document.getElementById('time');
            const healthElement = document.getElementById('health');
            const ammoElement = document.getElementById('ammoDisplay');
            const gameStatsElement = document.getElementById('gameStats');
            
            if (scoreElement) scoreElement.textContent = `Score: ${this.score}`;
            if (timeElement) timeElement.textContent = `Time: ${this.gameTime}s`;
            if (healthElement) healthElement.style.width = `${this.fighter.health}%`;
            if (ammoElement) ammoElement.textContent = `AMMO: ${this.fighter.ammo}`;
            
            if (gameStatsElement) {
                gameStatsElement.innerHTML = `
                    <div>Score: ${this.score}</div>
                    <div>Time: ${this.gameTime}s</div>
                    <div>Speed: ${speedKnots} KT</div>
                    <div>Alt: ${altitudeMeters}m (${altitudeFeet} FT)</div>
                    <div>Throttle: ${Math.round(this.fighter.throttle * 100)}%</div>
                    <div>G-Force: ${this.fighter.gForce.toFixed(1)}</div>
                    <div>Targets: ${this.enemies.length}</div>
                `;
            }
            
            this.updateWarnings();
            this.updateHUD();
        }
    }
    
    updateHUD() {
        // HUD 크로스헤어 업데이트
        const hudElement = document.getElementById('hudCrosshair');
        if (!hudElement) return;
        
        // 롤 각도에 따라 HUD 회전
        const rollDegrees = this.fighter.rotation.z * (180 / Math.PI);
        hudElement.style.transform = `translate(-50%, -50%) rotate(${-rollDegrees}deg)`;
        
        // 피치 래더 업데이트 - 수정된 부분
        const pitchLadder = document.getElementById('pitchLadder');
        if (pitchLadder) {
            const pitchDegrees = this.fighter.rotation.x * (180 / Math.PI);
            // 수정: 음수를 곱해서 반대 방향으로, 10도당 20픽셀
            const pitchOffset = -pitchDegrees * 2;
            pitchLadder.style.transform = `translateY(${pitchOffset}px)`;
        }
        
        // 비행 정보 업데이트
        const speedKnots = Math.round(this.fighter.speed * 1.94384);
        const altitudeMeters = Math.round(this.fighter.altitude);
        const pitchDegrees = Math.round(this.fighter.rotation.x * (180 / Math.PI));
        const rollDegreesRounded = Math.round(rollDegrees);
        const headingDegrees = Math.round(((this.fighter.rotation.y * (180 / Math.PI)) + 360) % 360);
        
        // 선회율 계산 (도/초)
        if (!this.lastHeading) this.lastHeading = headingDegrees;
        let turnRate = (headingDegrees - this.lastHeading);
        if (turnRate > 180) turnRate -= 360;
        if (turnRate < -180) turnRate += 360;
        this.lastHeading = headingDegrees;
        const turnRateDegPerSec = Math.round(turnRate / (1/60)); // 60 FPS 기준
        
        // HUD 정보 업데이트
        const hudSpeed = document.getElementById('hudSpeed');
        const hudAltitude = document.getElementById('hudAltitude');
        const hudHeading = document.getElementById('hudHeading');
        const hudPitch = document.getElementById('hudPitch');
        const hudRoll = document.getElementById('hudRoll');
        const hudTurnRate = document.getElementById('hudTurnRate');
        
        if (hudSpeed) hudSpeed.textContent = `SPD: ${speedKnots} KT`;
        if (hudAltitude) hudAltitude.textContent = `ALT: ${altitudeMeters} M`;
        if (hudHeading) hudHeading.textContent = `HDG: ${String(headingDegrees).padStart(3, '0')}°`;
        if (hudPitch) hudPitch.textContent = `PITCH: ${pitchDegrees}°`;
        if (hudRoll) hudRoll.textContent = `ROLL: ${rollDegreesRounded}°`;
        if (hudTurnRate) hudTurnRate.textContent = `TURN: ${Math.abs(turnRateDegPerSec) > 1 ? turnRateDegPerSec : 0}°/s`;
        
        // 적 타겟 마커 업데이트
        const targetMarkers = document.getElementById('targetMarkers');
        if (targetMarkers) {
            targetMarkers.innerHTML = '';
            
            // 모든 적에 대해 처리
            this.enemies.forEach(enemy => {
                if (!enemy.mesh || !enemy.isLoaded) return;
                
                const distance = this.fighter.position.distanceTo(enemy.position);
                if (distance > 10000) return; // 10km 이상은 표시하지 않음
                
                // 적의 화면 좌표 계산
                const enemyScreenPos = this.getScreenPosition(enemy.position);
                if (!enemyScreenPos) return;
                
                // 화면 중앙으로부터의 거리 계산
                const centerX = window.innerWidth / 2;
                const centerY = window.innerHeight / 2;
                const distFromCenter = Math.sqrt(
                    Math.pow(enemyScreenPos.x - centerX, 2) + 
                    Math.pow(enemyScreenPos.y - centerY, 2)
                );
                
                // 크로스헤어 반경 (75px)
                const crosshairRadius = 75;
                const isInCrosshair = distFromCenter < crosshairRadius;
                
                // 타겟 마커 생성
                const marker = document.createElement('div');
                marker.className = 'target-marker';
                
                if (isInCrosshair) {
                    marker.classList.add('in-crosshair');
                    
                    // 2000m 이내면 락온
                    if (distance < 2000) {
                        marker.classList.add('locked');
                    }
                    
                    // 타겟 박스 추가
                    const targetBox = document.createElement('div');
                    targetBox.className = 'target-box';
                    marker.appendChild(targetBox);
                    
                    // 거리 정보 추가
                    const targetInfo = document.createElement('div');
                    targetInfo.className = 'target-info';
                    targetInfo.textContent = `${Math.round(distance)}m`;
                    marker.appendChild(targetInfo);
                }
                
                marker.style.left = `${enemyScreenPos.x}px`;
                marker.style.top = `${enemyScreenPos.y}px`;
                
                targetMarkers.appendChild(marker);
            });
        }
    }
    
    getScreenPosition(worldPosition) {
        // 3D 좌표를 화면 좌표로 변환
        const vector = worldPosition.clone();
        vector.project(this.camera);
        
        // 카메라 뒤에 있는 객체는 표시하지 않음
        if (vector.z > 1) return null;
        
        const x = (vector.x * 0.5 + 0.5) * window.innerWidth;
        const y = (-vector.y * 0.5 + 0.5) * window.innerHeight;
        
        return { x, y };
    }

    updateWarnings() {
        // 기존 경고 메시지 제거
        const existingWarnings = document.querySelectorAll('.warning-message');
        existingWarnings.forEach(w => w.remove());
        
        // 스톨 탈출 경고 제거
        const existingStallWarnings = document.querySelectorAll('.stall-escape-warning');
        existingStallWarnings.forEach(w => w.remove());
        
        if (this.fighter.warningBlinkState) {
            const warningContainer = document.createElement('div');
            warningContainer.className = 'warning-message';
            warningContainer.style.cssText = `
                position: fixed;
                top: 30%;
                left: 50%;
                transform: translateX(-50%);
                color: #ff0000;
                font-size: 24px;
                font-weight: bold;
                text-shadow: 2px 2px 4px rgba(0,0,0,0.8);
                z-index: 1500;
                text-align: center;
            `;
            
            let warningText = '';
            
            if (this.fighter.altitude < 250) {
                warningText += 'PULL UP! PULL UP!\n';
            } else if (this.fighter.altitude < 500) {
                warningText += 'LOW ALTITUDE WARNING\n';
            }
            
            if (this.fighter.altitudeWarning) {
                warningText += 'ALTITUDE LIMIT\n';
            }
            
            if (this.fighter.stallWarning) {
                warningText += 'STALL WARNING\n';
            }
            
            if (this.fighter.overG) {
                warningText += 'OVER-G! OVER-G!\n';
            }
            
            if (warningText) {
                warningContainer.innerHTML = warningText.replace(/\n/g, '<br>');
                document.body.appendChild(warningContainer);
            }
        }
        
        // 스톨 상태일 때만 "Press W to Escape" 경고 표시
        if (this.fighter.stallWarning) {
            const stallEscapeWarning = document.createElement('div');
            stallEscapeWarning.className = 'stall-escape-warning';
            stallEscapeWarning.style.cssText = `
                position: fixed;
                bottom: 100px;
                left: 50%;
                transform: translateX(-50%);
                background: rgba(255, 0, 0, 0.8);
                color: #ffffff;
                font-size: 28px;
                font-weight: bold;
                padding: 15px 30px;
                border: 3px solid #ff0000;
                border-radius: 10px;
                z-index: 1600;
                text-align: center;
                animation: blink 0.5s infinite;
            `;
            stallEscapeWarning.innerHTML = 'PRESS F TO ESCAPE';
            document.body.appendChild(stallEscapeWarning);
            
            // 애니메이션 스타일 추가
            if (!document.getElementById('blinkAnimation')) {
                const style = document.createElement('style');
                style.id = 'blinkAnimation';
                style.innerHTML = `
                    @keyframes blink {
                        0%, 50% { opacity: 1; }
                        51%, 100% { opacity: 0.3; }
                    }
                `;
                document.head.appendChild(style);
            }
        }
        
        // Over-G 3초 이상일 때 시야 흐림 효과
        if (this.fighter.overG && this.fighter.overGTimer > 3.0) {
            let blurEffect = document.getElementById('overGBlurEffect');
            if (!blurEffect) {
                blurEffect = document.createElement('div');
                blurEffect.id = 'overGBlurEffect';
                document.body.appendChild(blurEffect);
            }
            
            // Over-G 지속 시간에 따라 흐림 정도 증가
            const blurIntensity = Math.min((this.fighter.overGTimer - 3.0) * 0.3, 0.8);
            blurEffect.style.cssText = `
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                height: 100%;
                background: radial-gradient(ellipse at center, 
                    transparent 20%, 
                    rgba(0, 0, 0, ${blurIntensity}) 50%, 
                    rgba(0, 0, 0, ${blurIntensity + 0.2}) 100%);
                pointer-events: none;
                z-index: 1400;
            `;
        } else {
            // Over-G 상태가 아니면 효과 제거
            const blurEffect = document.getElementById('overGBlurEffect');
            if (blurEffect) {
                blurEffect.remove();
            }
        }
    }

    updateRadar() {
        const radar = document.getElementById('radar');
        if (!radar) return;
        
        const oldDots = radar.getElementsByClassName('enemy-dot');
        while (oldDots[0]) {
            oldDots[0].remove();
        }
        
        const radarCenter = { x: 100, y: 100 };
        const radarRange = 10000;
        
        this.enemies.forEach(enemy => {
            if (!enemy.mesh || !enemy.isLoaded) return;
            
            const distance = this.fighter.position.distanceTo(enemy.position);
            if (distance <= radarRange) {
                const relativePos = enemy.position.clone().sub(this.fighter.position);
                const angle = Math.atan2(relativePos.x, relativePos.z);
                const relativeDistance = distance / radarRange;
                
                const dotX = radarCenter.x + Math.sin(angle) * (radarCenter.x * relativeDistance);
                const dotY = radarCenter.y + Math.cos(angle) * (radarCenter.y * relativeDistance);
                
                const dot = document.createElement('div');
                dot.className = 'enemy-dot';
                dot.style.left = `${dotX}px`;
                dot.style.top = `${dotY}px`;
                radar.appendChild(dot);
            }
        });
    }

    checkCollisions() {
        for (let i = this.fighter.bullets.length - 1; i >= 0; i--) {
            const bullet = this.fighter.bullets[i];
            
            for (let j = this.enemies.length - 1; j >= 0; j--) {
                const enemy = this.enemies[j];
                if (!enemy.mesh || !enemy.isLoaded) continue;
                
                const distance = bullet.position.distanceTo(enemy.position);
                if (distance < 25) {
                    this.scene.remove(bullet);
                    this.fighter.bullets.splice(i, 1);
                    
                    if (enemy.takeDamage(30)) {
                        enemy.destroy();
                        this.enemies.splice(j, 1);
                        this.score += 100;
                    }
                    break;
                }
            }
        }
        
        this.enemies.forEach(enemy => {
            enemy.bullets.forEach((bullet, index) => {
                const distance = bullet.position.distanceTo(this.fighter.position);
                if (distance < 30) {
                    this.scene.remove(bullet);
                    enemy.bullets.splice(index, 1);
                    
                    if (this.fighter.takeDamage(20)) {
                        this.endGame(false);
                    }
                }
            });
        });
    }

    animate() {
        if (this.isGameOver) return;
        
        this.animationFrameId = requestAnimationFrame(() => this.animate());
        
        const currentTime = performance.now();
        const deltaTime = Math.min((currentTime - this.lastTime) / 1000, 0.1);
        this.lastTime = currentTime;
        
        if (this.isLoaded && this.fighter.isLoaded) {
            // F키 상태를 Fighter에 전달
            this.fighter.escapeKeyPressed = this.keys.f;
            
            this.fighter.updateControls(this.keys, deltaTime);
            this.fighter.updatePhysics(deltaTime);
            this.fighter.updateBullets(this.scene, deltaTime);
            
            if (this.isStarted) {
                this.enemies.forEach(enemy => {
                    enemy.update(this.fighter.position, deltaTime);
                });
                
                this.checkCollisions();
                
                if (this.fighter.health <= 0 && this.fighter.position.y <= 0) {
                    this.endGame(false, "GROUND COLLISION");
                    return;
                }
                
                this.updateUI();
                this.updateRadar();
                
                if (this.enemies.length === 0) {
                    this.endGame(true);
                }
            }
            
            const targetCameraPos = this.fighter.getCameraPosition();
            const targetCameraTarget = this.fighter.getCameraTarget();
            
            this.camera.position.lerp(targetCameraPos, this.fighter.cameraLag);
            
            this.camera.lookAt(targetCameraTarget);
        } else {
            if (this.fighter.isLoaded) {
                const initialCameraPos = this.fighter.getCameraPosition();
                const initialTarget = this.fighter.getCameraTarget();
                this.camera.position.copy(initialCameraPos);
                this.camera.lookAt(initialTarget);
            }
        }
        
        this.renderer.render(this.scene, this.camera);
    }

    endGame(victory = false, reason = "") {
        this.isGameOver = true;
        
        if (this.fighter && this.fighter.stopAllWarningAudios) {
            this.fighter.stopAllWarningAudios();
        }
        
        if (this.bgm) {
            this.bgm.pause();
            this.bgm = null;
            this.bgmPlaying = false;
        }
        
        if (this.gameTimer) {
            clearInterval(this.gameTimer);
        }
        
        document.exitPointerLock();
        
        // 모든 경고 및 효과 제거
        const existingWarnings = document.querySelectorAll('.warning-message, .stall-escape-warning');
        existingWarnings.forEach(w => w.remove());
        
        const blurEffect = document.getElementById('overGBlurEffect');
        if (blurEffect) {
            blurEffect.remove();
        }
        
        const gameOverDiv = document.createElement('div');
        gameOverDiv.className = 'start-screen';
        gameOverDiv.style.display = 'flex';
        gameOverDiv.innerHTML = `
            <h1 style="color: ${victory ? '#0f0' : '#f00'}; font-size: 48px;">
                ${victory ? 'MISSION ACCOMPLISHED!' : 'SHOT DOWN!'}
            </h1>
            ${reason ? `<div style="color: #ff0000; font-size: 20px; margin: 10px 0;">${reason}</div>` : ''}
            <div style="color: #0f0; font-size: 24px; margin: 20px 0;">
                Final Score: ${this.score}<br>
                Enemies Destroyed: ${GAME_CONSTANTS.ENEMY_COUNT - this.enemies.length}<br>
                Mission Time: ${GAME_CONSTANTS.MISSION_DURATION - this.gameTime}s
            </div>
            <button class="start-button" onclick="location.reload()">
                New Mission
            </button>
        `;
        
        document.body.appendChild(gameOverDiv);
    }
}

// 전역 함수 및 이벤트
window.gameInstance = null;

window.startGame = function() {
    if (!window.gameInstance || !window.gameInstance.isLoaded || !window.gameInstance.isBGMReady) {
        console.log('게임이 아직 준비되지 않았습니다...');
        return;
    }
    
    gameStarted = true;
    document.getElementById('startScreen').style.display = 'none';
    
    document.body.requestPointerLock();
    
    window.gameInstance.startBGM();
    window.gameInstance.startGame();
}

function showPointerLockNotification() {
    const existingNotification = document.getElementById('pointerLockNotification');
    if (existingNotification) {
        existingNotification.remove();
    }

    const notification = document.createElement('div');
    notification.id = 'pointerLockNotification';
    notification.innerHTML = 'Click to resume control';
    notification.style.cssText = `
        position: fixed;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        background: rgba(0, 0, 0, 0.8);
        color: #00ff00;
        padding: 20px;
        border: 2px solid #00ff00;
        border-radius: 10px;
        font-size: 18px;
        z-index: 2001;
        text-align: center;
        pointer-events: none;
    `;
    
    document.body.appendChild(notification);

    const removeNotification = () => {
        if (document.pointerLockElement) {
            notification.remove();
            document.removeEventListener('pointerlockchange', removeNotification);
        }
    };
    document.addEventListener('pointerlockchange', removeNotification);
}

document.addEventListener('pointerlockchange', () => {
    if (document.pointerLockElement === document.body) {
        console.log('Pointer locked');
    } else {
        console.log('Pointer unlocked');
        if (gameStarted && window.gameInstance && !window.gameInstance.isGameOver) {
            console.log('게임 중 포인터 락 해제됨 - 클릭하여 다시 잠그세요');
            showPointerLockNotification();
        }
    }
});

document.addEventListener('click', (event) => {
    if (!gameStarted && !event.target.classList.contains('start-button')) {
        event.preventDefault();
        event.stopPropagation();
        return false;
    }
    
    if (gameStarted && window.gameInstance && !window.gameInstance.isGameOver) {
        if (!document.pointerLockElement) {
            console.log('게임 중 클릭 - 포인터 락 재요청');
            document.body.requestPointerLock();
        }
        else if (window.gameInstance.fighter.isLoaded) {
            window.gameInstance.fighter.shoot(window.gameInstance.scene);
        }
    }
}, true);

window.addEventListener('gameReady', () => {
    gameCanStart = true;
});

document.addEventListener('DOMContentLoaded', () => {
    console.log('전투기 시뮬레이터 초기화 중...');
    window.gameInstance = new Game();
});