'use strict';
function editLake() {
  if (customization) return;
  closeDialogs('.stable');
  if (layerIsOn('toggleCells')) toggleCells();

  $('#lakeEditor').dialog({
    title: 'Edit Lake',
    resizable: false,
    position: {my: 'center top+20', at: 'top', of: d3.event, collision: 'fit'},
    close: closeLakesEditor
  });

  const node = d3.event.target;
  debug.append('g').attr('id', 'vertices');
  elSelected = d3.select(node);
  updateLakeValues();
  selectLakeGroup(node);
  drawLakeVertices();
  viewbox.on('touchmove mousemove', null);

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

  // add listeners
  document.getElementById('lakeName').addEventListener('input', changeName);
  document.getElementById('lakeNameCulture').addEventListener('click', generateNameCulture);
  document.getElementById('lakeNameRandom').addEventListener('click', generateNameRandom);

  document.getElementById('lakeGroup').addEventListener('change', changeLakeGroup);
  document.getElementById('lakeGroupAdd').addEventListener('click', toggleNewGroupInput);
  document.getElementById('lakeGroupName').addEventListener('change', createNewGroup);
  document.getElementById('lakeGroupRemove').addEventListener('click', removeLakeGroup);

  document.getElementById('lakeEditStyle').addEventListener('click', editGroupStyle);
  document.getElementById('lakeLegend').addEventListener('click', editLakeLegend);

  function getLake() {
    const lakeId = +elSelected.attr('data-f');
    return pack.features.find((feature) => feature.i === lakeId);
  }

  function updateLakeValues() {
    const cells = pack.cells;

    const l = getLake();
    document.getElementById('lakeName').value = l.name;

    const unit = areaUnit.value === 'square' ? ' ' + distanceUnitInput.value + '²' : ' ' + areaUnit.value;
    document.getElementById('lakeArea').value = si(l.area * distanceScaleInput.value ** 2) + unit;

    const length = d3.polygonLength(l.vertices.map((v) => pack.vertices.p[v]));
    document.getElementById('lakeShoreLength').value = si(length * distanceScaleInput.value) + ' ' + distanceUnitInput.value;

    const lakeCells = Array.from(cells.i.filter((i) => cells.f[i] === l.i));
    const heights = lakeCells.map((i) => cells.h[i]);

    document.getElementById('lakeElevation').value = getHeight(l.height);
    document.getElementById('lakeAvarageDepth').value = getHeight(d3.mean(heights), 'abs');
    document.getElementById('lakeMaxDepth').value = getHeight(d3.min(heights), 'abs');

    document.getElementById('lakeFlux').value = l.flux;
    document.getElementById('lakeEvaporation').value = l.evaporation;

    const inlets = l.inlets && l.inlets.map((inlet) => pack.rivers.find((river) => river.i === inlet)?.name);
    const outlet = l.outlet ? pack.rivers.find((river) => river.i === l.outlet)?.name : 'no';
    document.getElementById('lakeInlets').value = inlets ? inlets.length : 'no';
    document.getElementById('lakeInlets').title = inlets ? inlets.join(', ') : '';
    document.getElementById('lakeOutlet').value = outlet;
  }

  function drawLakeVertices() {
    const v = getLake().vertices; // lake outer vertices

    const c = [...new Set(v.map((v) => pack.vertices.c[v]).flat())];
    debug
      .select('#vertices')
      .selectAll('polygon')
      .data(c)
      .enter()
      .append('polygon')
      .attr('points', (d) => getPackPolygon(d))
      .attr('data-c', (d) => d);

    debug
      .select('#vertices')
      .selectAll('circle')
      .data(v)
      .enter()
      .append('circle')
      .attr('cx', (d) => pack.vertices.p[d][0])
      .attr('cy', (d) => pack.vertices.p[d][1])
      .attr('r', 0.4)
      .attr('data-v', (d) => d)
      .call(d3.drag().on('drag', dragVertex))
      .on('mousemove', () => tip('Drag to move the vertex, please use for fine-tuning only. Edit heightmap to change actual cell heights'));
  }

  function dragVertex() {
    const x = rn(d3.event.x, 2),
      y = rn(d3.event.y, 2);
    this.setAttribute('cx', x);
    this.setAttribute('cy', y);
    const v = +this.dataset.v;
    pack.vertices.p[v] = [x, y];
    debug
      .select('#vertices')
      .selectAll('polygon')
      .attr('points', (d) => getPackPolygon(d));
    redrawLake();
  }

  function redrawLake() {
    lineGen.curve(d3.curveBasisClosed);
    const feature = getLake();
    const points = feature.vertices.map((v) => pack.vertices.p[v]);
    const d = round(lineGen(points));
    elSelected.attr('d', d);
    defs.select('mask#land > path#land_' + feature.i).attr('d', d); // update land mask

    const unit = areaUnit.value === 'square' ? ' ' + distanceUnitInput.value + '²' : ' ' + areaUnit.value;
    feature.area = Math.abs(d3.polygonArea(points));
    document.getElementById('lakeArea').value = si(feature.area * distanceScaleInput.value ** 2) + unit;
  }

  function changeName() {
    getLake().name = this.value;
  }

  function generateNameCulture() {
    const lake = getLake();
    lake.name = lakeName.value = Lakes.getName(lake);
  }

  function generateNameRandom() {
    const lake = getLake();
    lake.name = lakeName.value = Names.getBase(rand(nameBases.length - 1));
  }

  function selectLakeGroup(node) {
    const group = node.parentNode.id;
    const select = document.getElementById('lakeGroup');
    select.options.length = 0; // remove all options

    lakes.selectAll('g').each(function () {
      select.options.add(new Option(this.id, this.id, false, this.id === group));
    });
  }

  function changeLakeGroup() {
    document.getElementById(this.value).appendChild(elSelected.node());
    getLake().group = this.value;
  }

  function toggleNewGroupInput() {
    if (lakeGroupName.style.display === 'none') {
      lakeGroupName.style.display = 'inline-block';
      lakeGroupName.focus();
      lakeGroup.style.display = 'none';
    } else {
      lakeGroupName.style.display = 'none';
      lakeGroup.style.display = 'inline-block';
    }
  }

  function createNewGroup() {
    if (!this.value) {
      tip('Please provide a valid group name');
      return;
    }
    const group = this.value
      .toLowerCase()
      .replace(/ /g, '_')
      .replace(/[^\w\s]/gi, '');

    if (document.getElementById(group)) {
      tip('Element with this id already exists. Please provide a unique name', false, 'error');
      return;
    }

    if (Number.isFinite(+group.charAt(0))) {
      tip('Group name should start with a letter', false, 'error');
      return;
    }

    // just rename if only 1 element left
    const oldGroup = elSelected.node().parentNode;
    const basic = ['freshwater', 'salt', 'sinkhole', 'frozen', 'lava', 'dry'].includes(oldGroup.id);
    if (!basic && oldGroup.childElementCount === 1) {
      document.getElementById('lakeGroup').selectedOptions[0].remove();
      document.getElementById('lakeGroup').options.add(new Option(group, group, false, true));
      oldGroup.id = group;
      toggleNewGroupInput();
      document.getElementById('lakeGroupName').value = '';
      return;
    }

    // create a new group
    const newGroup = elSelected.node().parentNode.cloneNode(false);
    document.getElementById('lakes').appendChild(newGroup);
    newGroup.id = group;
    document.getElementById('lakeGroup').options.add(new Option(group, group, false, true));
    document.getElementById(group).appendChild(elSelected.node());

    toggleNewGroupInput();
    document.getElementById('lakeGroupName').value = '';
  }

  function removeLakeGroup() {
    const group = elSelected.node().parentNode.id;
    if (['freshwater', 'salt', 'sinkhole', 'frozen', 'lava', 'dry'].includes(group)) {
      tip('This is one of the default groups, it cannot be removed', false, 'error');
      return;
    }

    const count = elSelected.node().parentNode.childElementCount;
    const message = `Are you sure you want to remove the group? <br>All lakes of the group (${count}) will be turned into <i>freshwater</i>`;
    const onConfirm = () => {
      const freshwater = document.getElementById('freshwater');
      const groupEl = document.getElementById(group);
      while (groupEl.childNodes.length) {
        freshwater.appendChild(groupEl.childNodes[0]);
      }
      groupEl.remove();
      document.getElementById('lakeGroup').selectedOptions[0].remove();
      document.getElementById('lakeGroup').value = 'freshwater';
    };
    confirmationDialog({title: 'Remove lake group', message, confirm: 'Remove', onConfirm});
  }

  function editGroupStyle() {
    const g = elSelected.node().parentNode.id;
    editStyle('lakes', g);
  }

  function editLakeLegend() {
    const id = elSelected.attr('id');
    editNotes(id, getLake().name + ' ' + lakeGroup.value + ' lake');
  }

  function closeLakesEditor() {
    debug.select('#vertices').remove();
    unselect();
  }
}