/**
 * Workshop scene — room geometry, lighting, materials.
 *
 * A dark stone room with a wooden desk, crystal ball, fireplace glow,
 * and faint emerald ambient light. This is Timmy's Workshop.
 */

import * as THREE from "https://cdn.jsdelivr.net/npm/three@0.160.0/build/three.module.js";

const WALL_COLOR = 0x1a1a2e;
const FLOOR_COLOR = 0x1a1a1a;
const DESK_COLOR = 0x3e2723;
const DESK_TOP_COLOR = 0x4e342e;

/**
 * Build the room and add it to the given scene.
 * Returns { crystalBall } for animation.
 */
export function buildRoom(scene) {
    // --- Floor ---
    const floorGeo = new THREE.PlaneGeometry(8, 8);
    const floorMat = new THREE.MeshStandardMaterial({
        color: FLOOR_COLOR,
        roughness: 0.9,
    });
    const floor = new THREE.Mesh(floorGeo, floorMat);
    floor.rotation.x = -Math.PI / 2;
    floor.receiveShadow = true;
    scene.add(floor);

    // --- Back wall ---
    const wallGeo = new THREE.PlaneGeometry(8, 4);
    const wallMat = new THREE.MeshStandardMaterial({
        color: WALL_COLOR,
        roughness: 0.95,
    });
    const backWall = new THREE.Mesh(wallGeo, wallMat);
    backWall.position.set(0, 2, -4);
    scene.add(backWall);

    // --- Side walls ---
    const leftWall = new THREE.Mesh(wallGeo, wallMat);
    leftWall.position.set(-4, 2, 0);
    leftWall.rotation.y = Math.PI / 2;
    scene.add(leftWall);

    const rightWall = new THREE.Mesh(wallGeo, wallMat);
    rightWall.position.set(4, 2, 0);
    rightWall.rotation.y = -Math.PI / 2;
    scene.add(rightWall);

    // --- Desk ---
    // Table top
    const topGeo = new THREE.BoxGeometry(1.8, 0.08, 0.9);
    const topMat = new THREE.MeshStandardMaterial({
        color: DESK_TOP_COLOR,
        roughness: 0.6,
    });
    const tableTop = new THREE.Mesh(topGeo, topMat);
    tableTop.position.set(0, 0.85, -0.3);
    tableTop.castShadow = true;
    scene.add(tableTop);

    // Legs
    const legGeo = new THREE.BoxGeometry(0.08, 0.85, 0.08);
    const legMat = new THREE.MeshStandardMaterial({
        color: DESK_COLOR,
        roughness: 0.7,
    });
    const offsets = [
        [-0.8, -0.35],
        [0.8, -0.35],
        [-0.8, 0.05],
        [0.8, 0.05],
    ];
    for (const [x, z] of offsets) {
        const leg = new THREE.Mesh(legGeo, legMat);
        leg.position.set(x, 0.425, z - 0.3);
        scene.add(leg);
    }

    // --- Scrolls / papers on desk (simple flat boxes) ---
    const paperGeo = new THREE.BoxGeometry(0.3, 0.005, 0.2);
    const paperMat = new THREE.MeshStandardMaterial({
        color: 0xd4c5a0,
        roughness: 0.9,
    });
    const paper1 = new THREE.Mesh(paperGeo, paperMat);
    paper1.position.set(-0.4, 0.895, -0.35);
    paper1.rotation.y = 0.15;
    scene.add(paper1);

    const paper2 = new THREE.Mesh(paperGeo, paperMat);
    paper2.position.set(0.5, 0.895, -0.2);
    paper2.rotation.y = -0.3;
    scene.add(paper2);

    // --- Crystal ball ---
    const ballGeo = new THREE.SphereGeometry(0.12, 16, 14);
    const ballMat = new THREE.MeshPhysicalMaterial({
        color: 0x88ccff,
        roughness: 0.05,
        metalness: 0.0,
        transmission: 0.9,
        thickness: 0.3,
        transparent: true,
        opacity: 0.7,
    });
    const crystalBall = new THREE.Mesh(ballGeo, ballMat);
    crystalBall.position.set(0.15, 1.01, -0.3);
    scene.add(crystalBall);

    // Crystal ball base
    const baseGeo = new THREE.CylinderGeometry(0.08, 0.1, 0.04, 8);
    const baseMat = new THREE.MeshStandardMaterial({
        color: 0x444444,
        roughness: 0.3,
        metalness: 0.5,
    });
    const base = new THREE.Mesh(baseGeo, baseMat);
    base.position.set(0.15, 0.9, -0.3);
    scene.add(base);

    // Crystal ball inner glow
    const innerLight = new THREE.PointLight(0x88ccff, 0.3, 2);
    innerLight.position.copy(crystalBall.position);
    scene.add(innerLight);

    // --- Lighting ---

    // Fireplace glow (warm, off-screen stage left)
    const fireLight = new THREE.PointLight(0xff6622, 1.2, 8);
    fireLight.position.set(-3.5, 1.2, -1.0);
    fireLight.castShadow = true;
    fireLight.shadow.mapSize.width = 512;
    fireLight.shadow.mapSize.height = 512;
    scene.add(fireLight);

    // Secondary warm fill
    const fillLight = new THREE.PointLight(0xff8844, 0.3, 6);
    fillLight.position.set(-2.0, 0.5, 1.0);
    scene.add(fillLight);

    // Emerald ambient
    const ambient = new THREE.AmbientLight(0x00b450, 0.15);
    scene.add(ambient);

    // Faint overhead to keep things readable
    const overhead = new THREE.PointLight(0x887766, 0.2, 8);
    overhead.position.set(0, 3.5, 0);
    scene.add(overhead);

    return { crystalBall, fireLight };
}