const HEADER_PATH = "header.html";
const FOOTER_PATH = "footer.html";

document.addEventListener("DOMContentLoaded", () => {
    
    
    fetch(HEADER_PATH)
        .then(res => res.text())
        .then(data => {
            
            const headerPlaceholder = document.getElementById("page-header");
            if (headerPlaceholder) {
                headerPlaceholder.innerHTML = data;
                
                smoothScrollFix();
            }
        });

   
    fetch(FOOTER_PATH)
        .then(res => res.text())
        .then(data => {
           
            const footerPlaceholder = document.getElementById("page-footer");
            if (footerPlaceholder) {
                footerPlaceholder.innerHTML = data;
            }
        });
        

    if (document.getElementById("background-canvas") && typeof THREE !== 'undefined') {
        initBackground();
    }
});




function smoothScrollFix() {
    
    const links = document.querySelectorAll("nav a[href^='#']");

    links.forEach(link => {
        link.addEventListener("click", (e) => {
            
            
            if (link.getAttribute("href").length <= 1) return; 

            e.preventDefault();

            const targetID = link.getAttribute("href").substring(1);
            const target = document.getElementById(targetID);

            if (target) {
                
                const offset = -80; 
                const topPos = target.getBoundingClientRect().top + window.scrollY + offset;

                window.scrollTo({
                    top: topPos,
                    behavior: "smooth"
                });
            }
        });
    });
}



let scene, camera, renderer, particles, cubes = [];


function initBackground() {
    const canvas = document.getElementById("background-canvas");
    if (!canvas) {
        console.error("Erreur Three.js: Le canvas #background-canvas est introuvable.");
        return; 
    }

    scene = new THREE.Scene();
    camera = new THREE.PerspectiveCamera(
        75, window.innerWidth / window.innerHeight, 0.1, 1000
    );

    renderer = new THREE.WebGLRenderer({
        canvas: canvas,
        alpha: true,
        antialias: true
    });

    renderer.setSize(window.innerWidth, window.innerHeight);
    renderer.setPixelRatio(window.devicePixelRatio);


  
    const particleCount = 500;
    const positions = [];

    for (let i = 0; i < particleCount; i++) {
        positions.push((Math.random() - 0.5) * 200);
        positions.push((Math.random() - 0.5) * 200);
        positions.push((Math.random() - 0.5) * 200);
    }

    const geometry = new THREE.BufferGeometry();
    geometry.setAttribute("position", new THREE.Float32BufferAttribute(positions, 3));

    const material = new THREE.PointsMaterial({
        color: 0x00eaff,
        size: 0.4,
        transparent: true,
        opacity: 0.8
    });

    particles = new THREE.Points(geometry, material);
    scene.add(particles);


    
    for (let i = 0; i < 25; i++) {
        const cubeGeo = new THREE.BoxGeometry(2, 2, 2);
        const cubeMat = new THREE.MeshStandardMaterial({
            color: Math.random() * 0xffffff,
            wireframe: true
        });
        const cube = new THREE.Mesh(cubeGeo, cubeMat);

        cube.position.set(
            (Math.random() - 0.5) * 120,
            (Math.random() - 0.5) * 120,
            (Math.random() - 0.5) * 120
        );

        cubes.push(cube);
        scene.add(cube);
    }


    
    const light = new THREE.PointLight(0xffffff, 1.2);
    light.position.set(15, 50, 40);
    scene.add(light);


   
    camera.position.z = 70;

    animateBackground();
}



function animateBackground() {
    requestAnimationFrame(animateBackground);

    particles.rotation.y += 0.0009;
    particles.rotation.x += 0.0004;

    cubes.forEach(cube => {
        cube.rotation.x += 0.01;
        cube.rotation.y += 0.015;

        cube.position.x += (Math.random() - 0.5) * 0.02;
        cube.position.y += (Math.random() - 0.5) * 0.02;
    });

    renderer.render(scene, camera);
}



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