// Three.jsを使用した3Dマップの実装
let scene, camera, renderer, buildings = {}, residents = {};
let controls;

function init() {
    // シーンの作成
    scene = new THREE.Scene();
    scene.background = new THREE.Color(0x87CEEB); // 空色の背景

    // カメラの設定
    camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
    camera.position.set(50, 50, 50);
    camera.lookAt(0, 0, 0);

    // レンダラーの設定
    renderer = new THREE.WebGLRenderer({ antialias: true });
    renderer.setSize(window.innerWidth, window.innerHeight);
    renderer.shadowMap.enabled = true;
    document.getElementById('three-container').appendChild(renderer.domElement);

    // 光源の追加
    const ambientLight = new THREE.AmbientLight(0xffffff, 0.5);
    scene.add(ambientLight);
    const directionalLight = new THREE.DirectionalLight(0xffffff, 0.8);
    directionalLight.position.set(50, 50, 50);
    directionalLight.castShadow = true;
    scene.add(directionalLight);

    // 地面の作成
    const groundGeometry = new THREE.PlaneGeometry(100, 100);
    const groundMaterial = new THREE.MeshStandardMaterial({ 
        color: 0x90EE90,
        side: THREE.DoubleSide
    });
    const ground = new THREE.Mesh(groundGeometry, groundMaterial);
    ground.rotation.x = -Math.PI / 2;
    ground.receiveShadow = true;
    scene.add(ground);

    // カメラコントロールの追加
    controls = new THREE.OrbitControls(camera, renderer.domElement);
    controls.enableDamping = true;
    controls.dampingFactor = 0.05;

    // アニメーションループの開始
    animate();

    // ウィンドウリサイズのハンドリング
    window.addEventListener('resize', onWindowResize, false);
}

function createBuilding(name, position, type) {
    let geometry, material, color;
    
    // 建物の種類に応じて形状と色を設定
    switch(type) {
        case '住宅':
            geometry = new THREE.BoxGeometry(8, 6, 8);
            color = 0xFFB6C1; // ピンク系
            break;
        case '公園':
            geometry = new THREE.CylinderGeometry(5, 5, 2, 32);
            color = 0x228B22; // 森の緑
            break;
        case '図書館':
            geometry = new THREE.BoxGeometry(12, 8, 12);
            color = 0x8B4513; // 茶色
            break;
        case 'カフェ':
            geometry = new THREE.BoxGeometry(10, 6, 10);
            color = 0xDEB887; // ベージュ
            break;
        case '商店':
            geometry = new THREE.BoxGeometry(10, 5, 10);
            color = 0x4682B4; // スチールブルー
            break;
        default:
            geometry = new THREE.BoxGeometry(10, 10, 10);
            color = 0x808080;
    }

    material = new THREE.MeshStandardMaterial({ 
        color: color,
        roughness: 0.7,
        metalness: 0.2
    });
    
    const building = new THREE.Mesh(geometry, material);
    building.position.set(position.x, geometry.parameters.height / 2, position.z);
    building.castShadow = true;
    building.receiveShadow = true;
    scene.add(building);
    buildings[name] = building;

    // 建物名のラベル
    const canvas = document.createElement('canvas');
    const context = canvas.getContext('2d');
    canvas.width = 256;
    canvas.height = 64;
    context.fillStyle = '#ffffff';
    context.font = '24px Arial';
    context.fillText(name, 10, 32);
    const texture = new THREE.CanvasTexture(canvas);
    const labelMaterial = new THREE.SpriteMaterial({ map: texture });
    const label = new THREE.Sprite(labelMaterial);
    label.position.set(position.x, geometry.parameters.height + 2, position.z);
    scene.add(label);
}

function createResident(name, position, profession) {
    let geometry, material, color;
    
    // 職業に応じて色を設定
    switch(profession) {
        case '教師':
            color = 0x0000FF; // 青
            break;
        case '看護師':
            color = 0xFF0000; // 赤
            break;
        case 'エンジニア':
            color = 0x00FF00; // 緑
            break;
        case 'デザイナー':
            color = 0xFF00FF; // マゼンタ
            break;
        case '商店主':
            color = 0xFFA500; // オレンジ
            break;
        default:
            color = 0xFFFFFF; // 白
    }

    // 頭部
    const headGeometry = new THREE.SphereGeometry(1, 32, 32);
    const headMaterial = new THREE.MeshStandardMaterial({ color: 0xFFE4C4 });
    const head = new THREE.Mesh(headGeometry, headMaterial);
    head.position.y = 2;
    head.castShadow = true;

    // 胴体
    const bodyGeometry = new THREE.CylinderGeometry(0.7, 0.7, 2, 32);
    const bodyMaterial = new THREE.MeshStandardMaterial({ color: color });
    const body = new THREE.Mesh(bodyGeometry, bodyMaterial);
    body.position.y = 0.5;
    body.castShadow = true;

    // グループ化
    const resident = new THREE.Group();
    resident.add(head);
    resident.add(body);
    resident.position.set(position.x, 0, position.z);
    scene.add(resident);
    residents[name] = resident;

    // 住民名のラベル
    const canvas = document.createElement('canvas');
    const context = canvas.getContext('2d');
    canvas.width = 256;
    canvas.height = 64;
    context.fillStyle = '#ffffff';
    context.font = '24px Arial';
    context.fillText(name, 10, 32);
    const texture = new THREE.CanvasTexture(canvas);
    const labelMaterial = new THREE.SpriteMaterial({ map: texture });
    const label = new THREE.Sprite(labelMaterial);
    label.position.set(position.x, 4, position.z);
    scene.add(label);
}

function updatePositions(state) {
    // 建物の位置を更新
    state.locations.forEach(location => {
        if (!buildings[location.name]) {
            const type = location.name.includes('住宅') ? '住宅' :
                       location.name.includes('公園') ? '公園' :
                       location.name.includes('図書館') ? '図書館' :
                       location.name.includes('カフェ') ? 'カフェ' :
                       location.name.includes('商店') ? '商店' : 'その他';
            createBuilding(location.name, location.position, type);
        }
    });

    // 住民の位置を更新
    state.residents.forEach(resident => {
        if (!residents[resident.name]) {
            createResident(resident.name, resident.position, resident.profession);
        } else {
            // 現在位置から目標位置への移動をアニメーション
            const currentPos = residents[resident.name].position;
            const targetPos = new THREE.Vector3(
                resident.position.x,
                0,
                resident.position.z
            );
            
            // 移動速度
            const speed = 0.1;
            
            // 現在位置から目標位置への方向ベクトル
            const direction = targetPos.sub(currentPos).normalize();
            
            // 移動
            currentPos.add(direction.multiplyScalar(speed));
            
            // 住民の向きを移動方向に合わせる
            if (direction.length() > 0) {
                residents[resident.name].lookAt(targetPos);
            }
        }
    });
}

function onWindowResize() {
    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();
    renderer.setSize(window.innerWidth, window.innerHeight);
}

function animate() {
    requestAnimationFrame(animate);
    controls.update();
    renderer.render(scene, camera);
}

// 初期化
init();