class SwissClock {
  constructor(elementId, useUTC = false) {
    this.element = document.getElementById(elementId);
    this.useUTC = useUTC;

    if (!this.element) {
      console.error(`SwissClock : élément "${elementId}" introuvable.`);
      return;
    }

    this.createClock();
    this.update();
  }

  createClock() {
    this.element.innerHTML = "";

    // SVG
    this.svg = document.createElementNS("http://www.w3.org/2000/svg", "svg");

    this.svg.setAttribute("viewBox", "0 0 100 100");
    this.svg.setAttribute("width", "100%");
    this.svg.setAttribute("height", "100%");
    this.svg.setAttribute("aria-label", "Horloge suisse");

    // Style global
    this.svg.style.display = "block";
    this.svg.style.overflow = "visible";

    // Groupe principal
    this.clockGroup = document.createElementNS(
      "http://www.w3.org/2000/svg",
      "g",
    );

    // ------------------------------------------------------------
    // CADRAN
    // ------------------------------------------------------------

    const face = document.createElementNS(
      "http://www.w3.org/2000/svg",
      "circle",
    );

    face.setAttribute("cx", "50");
    face.setAttribute("cy", "50");
    face.setAttribute("r", "47");
    face.setAttribute("fill", "#ffffff");

    this.clockGroup.appendChild(face);

    // ------------------------------------------------------------
    // INDEX / MINUTES
    // ------------------------------------------------------------

    for (let i = 0; i < 60; i++) {
      const angle = ((i * 6 - 90) * Math.PI) / 180;

      const isHour = i % 5 === 0;

      const outerRadius = 44;
      const innerRadius = isHour ? 36 : 41;

      const x1 = 50 + Math.cos(angle) * innerRadius;
      const y1 = 50 + Math.sin(angle) * innerRadius;

      const x2 = 50 + Math.cos(angle) * outerRadius;
      const y2 = 50 + Math.sin(angle) * outerRadius;

      const tick = document.createElementNS(
        "http://www.w3.org/2000/svg",
        "line",
      );

      tick.setAttribute("x1", x1);
      tick.setAttribute("y1", y1);
      tick.setAttribute("x2", x2);
      tick.setAttribute("y2", y2);

      tick.setAttribute("stroke", "#111111");
      tick.setAttribute("stroke-width", isHour ? "2.2" : "0.8");

      tick.setAttribute("stroke-linecap", isHour ? "square" : "round");

      this.clockGroup.appendChild(tick);
    }

    // ------------------------------------------------------------
    // AIGUILLE DES HEURES
    // ------------------------------------------------------------

    this.hourHand = document.createElementNS(
      "http://www.w3.org/2000/svg",
      "line",
    );

    this.hourHand.setAttribute("x1", "50");
    this.hourHand.setAttribute("y1", "52");
    this.hourHand.setAttribute("x2", "50");
    this.hourHand.setAttribute("y2", "25");

    this.hourHand.setAttribute("stroke", "#111111");
    this.hourHand.setAttribute("stroke-width", "5");
    this.hourHand.setAttribute("stroke-linecap", "round");

    this.clockGroup.appendChild(this.hourHand);

    // ------------------------------------------------------------
    // AIGUILLE DES MINUTES
    // ------------------------------------------------------------

    this.minuteHand = document.createElementNS(
      "http://www.w3.org/2000/svg",
      "line",
    );

    this.minuteHand.setAttribute("x1", "50");
    this.minuteHand.setAttribute("y1", "53");
    this.minuteHand.setAttribute("x2", "50");
    this.minuteHand.setAttribute("y2", "15");

    this.minuteHand.setAttribute("stroke", "#111111");
    this.minuteHand.setAttribute("stroke-width", "3.5");
    this.minuteHand.setAttribute("stroke-linecap", "round");

    this.clockGroup.appendChild(this.minuteHand);

    // ------------------------------------------------------------
    // TROTTEUSE ROUGE
    // ------------------------------------------------------------

    this.secondHand = document.createElementNS(
      "http://www.w3.org/2000/svg",
      "line",
    );

    this.secondHand.setAttribute("x1", "50");
    this.secondHand.setAttribute("y1", "55");
    this.secondHand.setAttribute("x2", "50");
    this.secondHand.setAttribute("y2", "10");

    this.secondHand.setAttribute("stroke", "#e30613");
    this.secondHand.setAttribute("stroke-width", "1.5");
    this.secondHand.setAttribute("stroke-linecap", "round");

    this.clockGroup.appendChild(this.secondHand);

    // ------------------------------------------------------------
    // CONTREPOIDS DE LA TROTTEUSE
    // ------------------------------------------------------------

    this.secondCounterweight = document.createElementNS(
      "http://www.w3.org/2000/svg",
      "line",
    );

    this.secondCounterweight.setAttribute("x1", "50");
    this.secondCounterweight.setAttribute("y1", "48");
    this.secondCounterweight.setAttribute("x2", "50");
    this.secondCounterweight.setAttribute("y2", "61");

    this.secondCounterweight.setAttribute("stroke", "#e30613");
    this.secondCounterweight.setAttribute("stroke-width", "2");
    this.secondCounterweight.setAttribute("stroke-linecap", "round");

    this.clockGroup.appendChild(this.secondCounterweight);

    // ------------------------------------------------------------
    // CENTRE
    // ------------------------------------------------------------

    const centerOuter = document.createElementNS(
      "http://www.w3.org/2000/svg",
      "circle",
    );

    centerOuter.setAttribute("cx", "50");
    centerOuter.setAttribute("cy", "50");
    centerOuter.setAttribute("r", "3");
    centerOuter.setAttribute("fill", "#111111");

    this.clockGroup.appendChild(centerOuter);

    const centerInner = document.createElementNS(
      "http://www.w3.org/2000/svg",
      "circle",
    );

    centerInner.setAttribute("cx", "50");
    centerInner.setAttribute("cy", "50");
    centerInner.setAttribute("r", "1.3");
    centerInner.setAttribute("fill", "#e30613");

    this.clockGroup.appendChild(centerInner);

    // ------------------------------------------------------------
    // BORDURE
    // ------------------------------------------------------------

    const border = document.createElementNS(
      "http://www.w3.org/2000/svg",
      "circle",
    );

    border.setAttribute("cx", "50");
    border.setAttribute("cy", "50");
    border.setAttribute("r", "47");

    border.setAttribute("fill", "none");
    border.setAttribute("stroke", "#111111");
    border.setAttribute("stroke-width", "1.5");

    this.clockGroup.appendChild(border);

    // ------------------------------------------------------------
    // AJOUT AU SVG
    // ------------------------------------------------------------

    this.svg.appendChild(this.clockGroup);
    this.element.appendChild(this.svg);
  }

  getTime() {
    const now = new Date();

    if (this.useUTC) {
      return {
        hours: now.getUTCHours(),
        minutes: now.getUTCMinutes(),
        seconds: now.getUTCSeconds(),
        milliseconds: now.getUTCMilliseconds(),
      };
    }

    return {
      hours: now.getHours(),
      minutes: now.getMinutes(),
      seconds: now.getSeconds(),
      milliseconds: now.getMilliseconds(),
    };
  }

  update() {
    const time = this.getTime();

    // ------------------------------------------------------------
    // ANGLES
    // ------------------------------------------------------------

    // Heure
    const hourAngle = (time.hours % 12) * 30 + time.minutes * 0.5;

    // Minute
    const minuteAngle = time.minutes * 6 + time.seconds * 0.1;

    // Seconde
    const secondAngle = time.seconds * 6;

    // ------------------------------------------------------------
    // ROTATION DES AIGUILLES
    // ------------------------------------------------------------

    this.hourHand.setAttribute("transform", `rotate(${hourAngle} 50 50)`);

    this.minuteHand.setAttribute("transform", `rotate(${minuteAngle} 50 50)`);

    this.secondHand.setAttribute("transform", `rotate(${secondAngle} 50 50)`);

    this.secondCounterweight.setAttribute(
      "transform",
      `rotate(${secondAngle} 50 50)`,
    );

    // ------------------------------------------------------------
    // PROCHAIN RAF
    // ------------------------------------------------------------

    requestAnimationFrame(() => this.update());
  }
}