import * as THREE from 'three';
import { FontLoader } from 'three/addons/loaders/FontLoader.js';
import { Font } from 'three/examples/jsm/loaders/FontLoader.js';
import { TextGeometry } from 'three/addons/geometries/TextGeometry.js';
import { lerp, randFloat } from 'three/src/math/MathUtils.js';
import { OrbitControls } from 'three/examples/jsm/Addons.js';
import { depth } from 'three/examples/jsm/nodes/Nodes.js';

class PickHelper {

	constructor() {
	  this.raycaster = new THREE.Raycaster();
	  this.pickedObject = null;
	  this.lastObjectPicked = null;
	  this.sameObjectPicked = false;
	  this.initalPick = false;
	}

	pick(normalizedPosition, scene, camera, time) {
	  // restore the color if there is a picked object
	  if (this.pickedObject) {
		this.lastObjectPicked = this.pickedObject;
		this.sameObjectPicked = false;
		this.pickedObject = undefined;
	  }
   
	  // cast a ray through the frustum
	  this.raycaster.setFromCamera(normalizedPosition, camera);
	  // get the list of objects the ray intersected
	  const intersectedObjects = this.raycaster.intersectObjects(scene.children);
	  if (intersectedObjects.length) {
		// pick the first object. It's the closest one
		for (let i = 0; i < intersectedObjects.length; i++){

			if(intersectedObjects[i].object.geometry.type != "SphereGeometry"){
				this.pickedObject = intersectedObjects[i].object;
				if(intersectedObjects[i].object == this.lastObjectPicked)
					this.sameObjectPicked = true;
			}
		}	
		
		if (this.sameObjectPicked)
			this.pickedObject = this.lastObjectPicked;
	  }
	}

}

class Article {

	constructor(texture, title, filename, id){
		this.geom = new THREE.TetrahedronGeometry(1, 2);
		this.material = new THREE.MeshLambertMaterial({map: texture});
		this.mesh = new THREE.Mesh(this.geom, this.material);
		this.html = filename;
		this.name = title;
		this.id = id;
		this.hover = false;
		this.hoverScale = false;
		this.hoverLerpTime = 0;
		this.speed = randFloat(1.5, 2);
		this.rotationSpeed = randFloat(0.5, 1.5);
		this.scale = 1;
	}

	AddToScene(scene, aspect){
		this.mesh.position.x = (Math.random() - 0.5) * 8 * aspect;
		this.mesh.position.y = 8 + Math.random() * 15;
		scene.add(this.mesh);
	}

	UpdateRotation(time){
		this.mesh.rotation.x += this.rotationSpeed * time;
		this.mesh.rotation.y += this.rotationSpeed * time;
	}

	UpdatePosition(time, picker){
		this.BoundsCheck();
		this.HoverCheck(picker, time)
		if (!this.hover)
			this.mesh.position.y -= this.speed * time;
	}

	BoundsCheck(){
		if (this.mesh.position.y < -8) {
			const aspect = window.innerWidth / (window.innerHeight - 100);
			this.mesh.position.y = 8 + (Math.random() * 3);
			this.mesh.position.x = (Math.random() - 0.5) * 8 * aspect;
			this.speed = randFloat(1.5, 2)
		}
	}

	UpdateScale(multipler){
		this.mesh.scale.set(multipler, multipler, multipler);
	}

	HoverCheck(picker, time){
		const hoverIncrement = 0.01;
		const offHoverDecrement = 0.01;
	
		if (picker.pickedObject === this.mesh) {
			this.hover = true;
			if (this.hoverLerpTime < 1) {
				this.hoverLerpTime += hoverIncrement;
			}
			if (this.hoverLerpTime > 1) {
				this.hoverLerpTime = 1;
			}
			this.scale = lerp(this.scale, 2, this.hoverLerpTime);
		} else {
			this.hover = false;
			if (this.hoverLerpTime > 0) {
				this.hoverLerpTime -= offHoverDecrement;
			}
			if (this.hoverLerpTime < 0) {
				this.hoverLerpTime = 0;
			}
			this.scale = lerp(this.scale, 1, 1 - this.hoverLerpTime);
		}
	
		this.UpdateScale(this.scale);
	}

	


}

let scene, camera, renderer, cube;
let texture, planeMat, mesh, moloch_txt;
let lastTime = 0; // Keep track of the last frame time
let textGeo, textWidth, textMaterial, textMesh;
let text_Geometries = [];
let isHovering = false;
const pickPosition = {x: 0, y: 0};
const pickHelper = new PickHelper();
const object_list = []
const object_count = 20;
const fontLoader = new FontLoader();
let group = new THREE.Group();
let pastArticle;

function init() {

  // Set to a value outside the screen range
  pickPosition.x = -100000; 
  pickPosition.y = -100000;
  
  const loader = new THREE.TextureLoader();
  texture = loader.load('/images/website/checker.png');

  // Create a renderer and attach it to our document
  renderer = new THREE.WebGLRenderer({ antialias: true });
  renderer.shadowMap.enabled = true;
  renderer.setSize(window.innerWidth, window.innerHeight - 100);
  document.getElementById('container').appendChild(renderer.domElement);
  document.getElementById('container').style.overflowY = 'hidden';

  // Create the scene
  scene = new THREE.Scene();
  scene.background = new THREE.Color('black');

  // Camera Setup
  const aspect = window.innerWidth / (window.innerHeight - 100); // Adjust for nav height
  const frustumSize = 10;
  camera = new THREE.OrthographicCamera(
  	frustumSize * aspect / -2,
  	frustumSize * aspect / 2,
  	frustumSize / 2,
  	frustumSize / -2,
  	0.1,
  	5000
  );
  
  //const controls = new OrbitControls(camera, renderer.domElement);

  camera.position.z = 20;

  // Fetch JSON data
  fetch('../json/articles.json')
  .then(response => response.json())
  .then(jsonData => {
	for (let i = 0; i < jsonData.length; i++) {
		let temp_txt = loader.load('../images/' + jsonData[i]['image']);
		temp_txt.minFilter = THREE.NearestFilter;
		let title = jsonData[i]['name']
		let filename =  jsonData[i]['filename']
		let article = new Article(temp_txt, title, filename, i);
		article.AddToScene(scene, aspect);
		object_list.push(article);
	  }
  })

  

  // Plane Setup
  {
	const planeSize = 40;

	
	texture.wrapS = THREE.RepeatWrapping;
	texture.wrapT = THREE.RepeatWrapping;
	texture.magFilter = THREE.NearestFilter;
	texture.colorSpace = THREE.SRGBColorSpace;
	const repeats = planeSize / 1;
	texture.repeat.set(repeats, repeats);

	const planeGeo = new THREE.SphereGeometry(10);
	planeMat = new THREE.MeshPhongMaterial({
		map: texture,
		side: THREE.DoubleSide,
	});

	mesh = new THREE.Mesh(planeGeo, planeMat);
	mesh.position.z = -20
	scene.add(mesh);
  }

  // Light Setup
  {
    const color = 0xFFFFFF;
    const intensity = 3;
    const light = new THREE.DirectionalLight(color, intensity);
    light.castShadow = true;
    light.position.set(1, 1, 10);
    light.target.position.set(-0, 0, -0);
    light.shadow.camera.top = 25;
    light.shadow.camera.bottom = -25;
    light.shadow.camera.left = -25;
    light.shadow.camera.right = 25;
    light.shadow.camera.zoom = 1;
    scene.add(light);
    scene.add(light.target);
  }

  // Start with an initial timestamp
  animate(0); 
}

function animate(time) {
	requestAnimationFrame(animate);

	// Calculate the time elapsed since the last frame
	const deltaTime = (time - lastTime) / 1000; // Convert time to seconds
	lastTime = time;

	pickHelper.pick(pickPosition, scene, camera, time);

	for (let i = 0; i < object_list.length; i++){
		object_list[i].UpdateRotation(deltaTime);
		object_list[i].UpdatePosition(deltaTime, pickHelper);
	}
  
	// Update the plane texture offset
	const scrollSpeed = 0.2;
	planeMat.map.offset.y += scrollSpeed * deltaTime;
	planeMat.map.offset.x += scrollSpeed / 0.75 * deltaTime;
	
	ChangeCursor();
	// Render the scene from the perspective of the camera
	renderer.render(scene, camera);
}

// Handle window resize
window.addEventListener('resize', () => {
  const aspect = window.innerWidth / (window.innerHeight - 100);
  const frustumSize = 10;
  camera.left = -frustumSize * aspect / 2;
  camera.right = frustumSize * aspect / 2;
  camera.top = frustumSize / 2;
  camera.bottom = -frustumSize / 2;
  camera.updateProjectionMatrix();
  renderer.setPixelRatio(window.devicePixelRatio);
  renderer.setSize(window.innerWidth, window.innerHeight - 100);
});



  function getCanvasRelativePosition(event) {
	const rect = document.querySelector('#container').getBoundingClientRect();
	return {
	  x: (event.clientX - rect.left) * window.innerWidth  / rect.width,
	  y: (event.clientY - rect.top ) * (window.innerHeight - 100) / rect.height,
	};
  }
   
  function setPickPosition(event) {
	const pos = getCanvasRelativePosition(event);
	pickPosition.x = (pos.x / window.innerWidth ) *  2 - 1;
	pickPosition.y = (pos.y / ( window.innerHeight-100 ) ) * -2 + 1;  // note we flip Y
  }
   
  function clearPickPosition() {
	// unlike the mouse which always has a position
	// if the user stops touching the screen we want
	// to stop picking. For now we just pick a value
	// unlikely to pick something
	pickPosition.x = -100000;
	pickPosition.y = -100000;
  }

  function objectClicked(event) {
    if (pickHelper.pickedObject) {
        // Find the corresponding Article object
        const pickedArticle = object_list.find(article => article.mesh === pickHelper.pickedObject);
        if (pickedArticle) {
            window.location.href = pickedArticle.html;
        }
    }
  }

  function ChangeCursor(){
	const pickedArticle = object_list.find(article => article.mesh === pickHelper.pickedObject);
        if (pickedArticle) {
			document.body.style.cursor = 'pointer';
			if (pickedArticle.name != pastArticle)
				console.log('updated!')
				UpdateText(pickedArticle.name);
        }else{
			document.body.style.cursor = 'default';
			ClearTextGeoList();
			isHovering = false
		}
  }

  function UpdateText(text) {
    MeasureText(text);
	pastArticle = text
}

function ClearTextGeoList() {
	scene.remove(group)
	text_Geometries = [];
}

// Preload font
let cachedFont = null;
fontLoader.load('fonts/Redaction 50_Regular.json', (font) => {
    cachedFont = font;
});

function MeasureText(text) {
    if (!cachedFont) {
        // Font is not loaded yet, handle appropriately (e.g., show loading indicator or retry later)
        return;
    }

    ClearTextGeoList();

    // Adjust font size based on window dimensions
    let initialFontSize = 1;
    if (window.innerWidth < 1024) {
        initialFontSize = 0.5;
    } else if (window.innerWidth < 512) {
        initialFontSize = 0.25;
    }

    const aspect = window.innerWidth / (window.innerHeight - 100); // Adjust for nav height
    const orthoWidth = 10 * aspect;

    const lines = splitTextIntoLines(text, orthoWidth, initialFontSize);

    const numLines = lines.length;
    const totalHeight = (numLines - 1) * (1.5 * initialFontSize);
    const startY = totalHeight / 2;

    for (let i = 0; i < numLines; i++) {
        const line = lines[i];
        const textGeo = createTextGeometry(line.text, line.fontSize);
        textGeo.computeBoundingBox();

        const textMaterial = new THREE.MeshNormalMaterial();
        const textMesh = new THREE.Mesh(textGeo, textMaterial);

        const centerOffsetX = (textGeo.boundingBox.max.x - textGeo.boundingBox.min.x) / 2;
        const centerOffsetY = (textGeo.boundingBox.max.y - textGeo.boundingBox.min.y) / 2;
        const centerOffsetZ = (textGeo.boundingBox.max.z - textGeo.boundingBox.min.z) / 2;

        textGeo.translate(-centerOffsetX, -centerOffsetY, -centerOffsetZ);
        textMesh.rotation.x = Math.PI / 2 * 0.05;
        textMesh.position.y = startY - (i * (1.5 * initialFontSize));
        textMesh.position.z = 5;

        text_Geometries.push(textMesh);
    }

	group = new THREE.Group();
    text_Geometries.forEach(mesh => group.add(mesh));
    scene.add(group);
}

function splitTextIntoLines(text, maxWidth, initialFontSize) {
    const words = text.split(" ");
    const lines = [];
    let currentLine = "";
    let currentFontSize = initialFontSize;

    for (let i = 0; i < words.length; i++) {
        const testLine = currentLine + (currentLine ? " " : "") + words[i];
        const textGeo = createTextGeometry(testLine, currentFontSize);
        textGeo.computeBoundingBox();
        const proportion = textGeo.boundingBox.max.x / maxWidth;

        if (proportion > 0.8) { // Assuming 80% width utilization threshold
            lines.push({ text: currentLine, fontSize: currentFontSize });
            currentLine = words[i];
            // Adjust fontSize based on line length if needed
        } else {
            currentLine = testLine;
        }
    }

    if (currentLine !== "") {
        lines.push({ text: currentLine, fontSize: currentFontSize });
    }

    return lines;
}

function createTextGeometry(text, size) {
	
    return new TextGeometry(text, {
        height: 2,
        depth: 1,
        font: cachedFont,
        size: size,
        curveSegments: 1
    });
}

  window.addEventListener('mousemove', setPickPosition);
  window.addEventListener('mouseout', clearPickPosition);
  window.addEventListener('mouseleave', clearPickPosition);
  window.addEventListener('click', objectClicked)

// Initialize the application
init();