'use strict';
function editReliefIcon() {
  if (customization) return;
  closeDialogs('.stable');
  if (!layerIsOn('toggleRelief')) toggleRelief();

  terrain.selectAll('use').call(d3.drag().on('drag', dragReliefIcon)).classed('draggable', true);
  elSelected = d3.select(d3.event.target);

  restoreEditMode();
  updateReliefIconSelected();
  updateReliefSizeInput();

  $("#reliefEditor").dialog({
    title: "Edit Relief Icons",
    resizable: false,
    width: "27em",
    position: {my: "left top", at: "left+10 top+10", of: "#map"},
    close: closeReliefEditor
  });

  if (modules.editReliefIcon) return;
  modules.editReliefIcon = true;

  // add listeners
  document.getElementById('reliefIndividual').addEventListener('click', enterIndividualMode);
  document.getElementById('reliefBulkAdd').addEventListener('click', enterBulkAddMode);
  document.getElementById('reliefBulkRemove').addEventListener('click', enterBulkRemoveMode);

  document.getElementById('reliefSize').addEventListener('input', changeIconSize);
  document.getElementById('reliefSizeNumber').addEventListener('input', changeIconSize);
  document.getElementById('reliefEditorSet').addEventListener('change', changeIconsSet);
  reliefIconsDiv.querySelectorAll('svg').forEach((el) => el.addEventListener('click', changeIcon));

  document.getElementById('reliefEditStyle').addEventListener('click', () => editStyle('terrain'));
  document.getElementById('reliefCopy').addEventListener('click', copyIcon);
  document.getElementById('reliefMoveFront').addEventListener('click', () => elSelected.raise());
  document.getElementById('reliefMoveBack').addEventListener('click', () => elSelected.lower());
  document.getElementById('reliefRemove').addEventListener('click', removeIcon);

  function dragReliefIcon() {
    const dx = +this.getAttribute('x') - d3.event.x;
    const dy = +this.getAttribute('y') - d3.event.y;

    d3.event.on("drag", function () {
      const x = d3.event.x,
        y = d3.event.y;
      this.setAttribute("x", dx + x);
      this.setAttribute("y", dy + y);
    });
  }

  function restoreEditMode() {
    if (!reliefTools.querySelector("button.pressed")) enterIndividualMode();
    else if (reliefBulkAdd.classList.contains("pressed")) enterBulkAddMode();
    else if (reliefBulkRemove.classList.contains("pressed")) enterBulkRemoveMode();
  }

  function updateReliefIconSelected() {
    const type = elSelected.attr("href") || elSelected.attr("data-type");
    const button = reliefIconsDiv.querySelector("svg[data-type='" + type + "']");

    reliefIconsDiv.querySelectorAll("svg.pressed").forEach(b => b.classList.remove("pressed"));
    button.classList.add("pressed");
    reliefIconsDiv.querySelectorAll("div").forEach(b => (b.style.display = "none"));
    button.parentNode.style.display = "block";
    reliefEditorSet.value = button.parentNode.dataset.type;
  }

  function updateReliefSizeInput() {
    const size = +elSelected.attr('width');
    reliefSize.value = reliefSizeNumber.value = rn(size);
  }

  function enterIndividualMode() {
    reliefTools.querySelectorAll('button.pressed').forEach((b) => b.classList.remove('pressed'));
    reliefIndividual.classList.add('pressed');

    reliefSizeDiv.style.display = 'block';
    reliefRadiusDiv.style.display = 'none';
    reliefSpacingDiv.style.display = 'none';
    reliefIconsSeletionAny.style.display = 'none';

    removeCircle();
    updateReliefSizeInput();
    restoreDefaultEvents();
    clearMainTip();
  }

  function enterBulkAddMode() {
    reliefTools.querySelectorAll('button.pressed').forEach((b) => b.classList.remove('pressed'));
    reliefBulkAdd.classList.add('pressed');

    reliefSizeDiv.style.display = 'block';
    reliefRadiusDiv.style.display = 'block';
    reliefSpacingDiv.style.display = 'block';
    reliefIconsSeletionAny.style.display = 'none';

    const pressedType = reliefIconsDiv.querySelector("svg.pressed");
    if (pressedType.id === "reliefIconsSeletionAny") {
      // in "any" is pressed, select first type
      reliefIconsSeletionAny.classList.remove("pressed");
      reliefIconsDiv.querySelector("svg").classList.add("pressed");
    }

    viewbox.style('cursor', 'crosshair').call(d3.drag().on('start', dragToAdd)).on('touchmove mousemove', moveBrush);
    tip('Drag to place relief icons within radius', true);
  }

  function moveBrush() {
    showMainTip();
    const point = d3.mouse(this);
    const radius = +reliefRadiusNumber.value;
    moveCircle(point[0], point[1], radius);
  }

  function dragToAdd() {
    const pressed = reliefIconsDiv.querySelector("svg.pressed");
    if (!pressed) return tip("Please select an icon", false, error);

    const type = pressed.dataset.type;
    const r = +reliefRadiusNumber.value;
    const spacing = +reliefSpacingNumber.value;
    const size = +reliefSizeNumber.value;

    // build a quadtree
    const tree = d3.quadtree();
    const positions = [];
    terrain.selectAll("use").each(function () {
      const x = +this.getAttribute("x") + this.getAttribute("width") / 2;
      const y = +this.getAttribute("y") + this.getAttribute("height") / 2;
      tree.add([x, y, x]);
      const box = this.getBBox();
      positions.push(box.y + box.height);
    });

    d3.event.on("drag", function () {
      const p = d3.mouse(this);
      moveCircle(p[0], p[1], r);

      d3.range(Math.ceil(r / 10)).forEach(function () {
        const a = Math.PI * 2 * Math.random();
        const rad = r * Math.random();
        const cx = p[0] + rad * Math.cos(a);
        const cy = p[1] + rad * Math.sin(a);

        if (tree.find(cx, cy, spacing)) return; // too close to existing icon
        if (pack.cells.h[findCell(cx, cy)] < 20) return; // on water cell

        const h = rn((size / 2) * (Math.random() * 0.4 + 0.8), 2);
        const x = rn(cx - h, 2);
        const y = rn(cy - h, 2);
        const z = y + h * 2;
        const s = rn(h * 2, 2);

        let nth = 1;
        while (positions[nth] && z > positions[nth]) {
          nth++;
        }

        tree.add([cx, cy]);
        positions.push(z);
        terrain
          .insert("use", ":nth-child(" + nth + ")")
          .attr("href", type)
          .attr("x", x)
          .attr("y", y)
          .attr("width", s)
          .attr("height", s);
      });
    });
  }

  function enterBulkRemoveMode() {
    reliefTools.querySelectorAll('button.pressed').forEach((b) => b.classList.remove('pressed'));
    reliefBulkRemove.classList.add('pressed');

    reliefSizeDiv.style.display = 'none';
    reliefRadiusDiv.style.display = 'block';
    reliefSpacingDiv.style.display = 'none';
    reliefIconsSeletionAny.style.display = 'inline-block';

    viewbox.style("cursor", "crosshair").call(d3.drag().on("start", dragToRemove)).on("touchmove mousemove", moveBrush);
    tip("Drag to remove relief icons in radius", true);
  }

  function dragToRemove() {
    const pressed = reliefIconsDiv.querySelector("svg.pressed");
    if (!pressed) return tip("Please select an icon", false, error);

    const r = +reliefRadiusNumber.value;
    const type = pressed.dataset.type;
    const icons = type ? terrain.selectAll("use[href='" + type + "']") : terrain.selectAll("use");
    const tree = d3.quadtree();
    icons.each(function () {
      const x = +this.getAttribute("x") + this.getAttribute("width") / 2;
      const y = +this.getAttribute("y") + this.getAttribute("height") / 2;
      tree.add([x, y, this]);
    });

    d3.event.on("drag", function () {
      const p = d3.mouse(this);
      moveCircle(p[0], p[1], r);
      tree.findAll(p[0], p[1], r).forEach((f) => f[2].remove());
    });
  }

  function changeIconSize() {
    const size = +reliefSizeNumber.value;
    if (!reliefIndividual.classList.contains('pressed')) return;

    const shift = (size - +elSelected.attr("width")) / 2;
    elSelected.attr("width", size).attr("height", size);
    const x = +elSelected.attr("x"),
      y = +elSelected.attr("y");
    elSelected.attr("x", x - shift).attr("y", y - shift);
  }

  function changeIconsSet() {
    const set = reliefEditorSet.value;
    reliefIconsDiv.querySelectorAll("div").forEach(b => (b.style.display = "none"));
    reliefIconsDiv.querySelector("div[data-type='" + set + "']").style.display = "block";
  }

  function changeIcon() {
    if (this.classList.contains('pressed')) return;

    reliefIconsDiv.querySelectorAll("svg.pressed").forEach(b => b.classList.remove("pressed"));
    this.classList.add("pressed");

    if (reliefIndividual.classList.contains('pressed')) {
      const type = this.dataset.type;
      elSelected.attr('href', type);
    }
  }

  function copyIcon() {
    const parent = elSelected.node().parentNode;
    const copy = elSelected.node().cloneNode(true);

    let x = +elSelected.attr("x") - 3,
      y = +elSelected.attr("y") - 3;
    while (parent.querySelector("[x='" + x + "']", "[x='" + y + "']")) {
      x -= 3;
      y -= 3;
    }

    copy.setAttribute('x', x);
    copy.setAttribute('y', y);
    parent.insertBefore(copy, null);
  }

  function removeIcon() {
    let selection = null;
    const pressed = reliefTools.querySelector("button.pressed");
    if (pressed.id === "reliefIndividual") {
      alertMessage.innerHTML = "Are you sure you want to remove the icon?";
      selection = elSelected;
    } else {
      const type = reliefIconsDiv.querySelector("svg.pressed")?.dataset.type;
      selection = type ? terrain.selectAll("use[href='" + type + "']") : terrain.selectAll("use");
      const size = selection.size();
      alertMessage.innerHTML = type ? `Are you sure you want to remove all ${type} icons (${size})?` : `Are you sure you want to remove all icons (${size})?`;
    }

    $("#alert").dialog({
      resizable: false,
      title: "Remove relief icons",
      buttons: {
        Remove: function () {
          if (selection) selection.remove();
          $(this).dialog("close");
          $("#reliefEditor").dialog("close");
        },
        Cancel: function () {
          $(this).dialog("close");
        }
      }
    });
  }

  function closeReliefEditor() {
    terrain.selectAll('use').call(d3.drag().on('drag', null)).classed('draggable', false);
    removeCircle();
    unselect();
    clearMainTip();
  }
}