'use strict';
function overviewRivers() {
  if (customization) return;
  closeDialogs('#riversOverview, .stable');
  if (!layerIsOn('toggleRivers')) toggleRivers();

  const body = document.getElementById('riversBody');
  riversOverviewAddLines();
  $('#riversOverview').dialog();

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

  $('#riversOverview').dialog({
    title: 'Rivers Overview',
    resizable: false,
    width: fitContent(),
    position: {my: 'right top', at: 'right-10 top+10', of: 'svg', collision: 'fit'}
  });

  // add listeners
  document.getElementById('riversOverviewRefresh').addEventListener('click', riversOverviewAddLines);
  document.getElementById('addNewRiver').addEventListener('click', toggleAddRiver);
  document.getElementById('riversBasinHighlight').addEventListener('click', toggleBasinsHightlight);
  document.getElementById('riversExport').addEventListener('click', downloadRiversData);
  document.getElementById('riversRemoveAll').addEventListener('click', triggerAllRiversRemove);

  // add line for each river
  function riversOverviewAddLines() {
    body.innerHTML = '';
    let lines = '';
    const unit = distanceUnitInput.value;

    for (const r of pack.rivers) {
      const discharge = r.discharge + ' m³/s';
      const length = rn(r.length * distanceScaleInput.value) + ' ' + unit;
      const width = rn(r.width * distanceScaleInput.value, 3) + ' ' + unit;
      const basin = pack.rivers.find((river) => river.i === r.basin)?.name;

      lines += `<div class="states" data-id=${r.i} data-name="${r.name}" data-type="${r.type}" data-discharge="${r.discharge}" data-length="${r.length}" data-width="${r.width}" data-basin="${basin}">
        <span data-tip="Click to focus on river" class="icon-dot-circled pointer"></span>
        <div data-tip="River name" class="riverName">${r.name}</div>
        <div data-tip="River type name" class="riverType">${r.type}</div>
        <div data-tip="River discharge (flux power)" class="biomeArea">${discharge}</div>
        <div data-tip="River length from source to mouth" class="biomeArea">${length}</div>
        <div data-tip="River mouth width" class="biomeArea">${width}</div>
        <input data-tip="River basin (name of the main stem)" class="stateName" value="${basin}" disabled>
        <span data-tip="Edit river" class="icon-pencil"></span>
        <span data-tip="Remove river" class="icon-trash-empty"></span>
      </div>`;
    }
    body.insertAdjacentHTML('beforeend', lines);

    // update footer
    riversFooterNumber.innerHTML = pack.rivers.length;
    const averageDischarge = rn(d3.mean(pack.rivers.map((r) => r.discharge)));
    riversFooterDischarge.innerHTML = averageDischarge + ' m³/s';
    const averageLength = rn(d3.mean(pack.rivers.map((r) => r.length)));
    riversFooterLength.innerHTML = averageLength * distanceScaleInput.value + ' ' + unit;
    const averageWidth = rn(d3.mean(pack.rivers.map((r) => r.width)), 3);
    riversFooterWidth.innerHTML = rn(averageWidth * distanceScaleInput.value, 3) + ' ' + unit;

    // add listeners
    body.querySelectorAll('div.states').forEach((el) => el.addEventListener('mouseenter', (ev) => riverHighlightOn(ev)));
    body.querySelectorAll('div.states').forEach((el) => el.addEventListener('mouseleave', (ev) => riverHighlightOff(ev)));
    body.querySelectorAll('div > span.icon-dot-circled').forEach((el) => el.addEventListener('click', zoomToRiver));
    body.querySelectorAll('div > span.icon-pencil').forEach((el) => el.addEventListener('click', openRiverEditor));
    body.querySelectorAll('div > span.icon-trash-empty').forEach((el) => el.addEventListener('click', triggerRiverRemove));

    applySorting(riversHeader);
  }

  function riverHighlightOn(event) {
    if (!layerIsOn('toggleRivers')) toggleRivers();
    const r = +event.target.dataset.id;
    rivers
      .select('#river' + r)
      .attr('stroke', 'red')
      .attr('stroke-width', 1);
  }

  function riverHighlightOff(e) {
    const r = +e.target.dataset.id;
    rivers
      .select('#river' + r)
      .attr('stroke', null)
      .attr('stroke-width', null);
  }

  function zoomToRiver() {
    const r = +this.parentNode.dataset.id;
    const river = rivers.select('#river' + r).node();
    highlightElement(river);
  }

  function toggleBasinsHightlight() {
    if (rivers.attr('data-basin') === 'hightlighted') {
      rivers.selectAll('*').attr('fill', null);
      rivers.attr('data-basin', null);
    } else {
      rivers.attr('data-basin', 'hightlighted');
      const basins = [...new Set(pack.rivers.map((r) => r.basin))];
      const colors = ['#1f77b4', '#ff7f0e', '#2ca02c', '#d62728', '#9467bd', '#8c564b', '#e377c2', '#7f7f7f', '#bcbd22', '#17becf'];

      basins.forEach((b, i) => {
        const color = colors[i % colors.length];
        pack.rivers
          .filter((r) => r.basin === b)
          .forEach((r) => {
            rivers.select('#river' + r.i).attr('fill', color);
          });
      });
    }
  }

  function downloadRiversData() {
    let data = 'Id,River,Type,Discharge,Length,Width,Basin\n'; // headers

    body.querySelectorAll(':scope > div').forEach(function (el) {
      const d = el.dataset;
      const discharge = d.discharge + ' m³/s';
      const length = rn(d.length * distanceScaleInput.value) + ' ' + distanceUnitInput.value;
      const width = rn(d.width * distanceScaleInput.value, 3) + ' ' + distanceUnitInput.value;
      data += [d.id, d.name, d.type, discharge, length, width, d.basin].join(',') + '\n';
    });

    const name = getFileName('Rivers') + '.csv';
    downloadFile(data, name);
  }

  function openRiverEditor() {
    editRiver('river' + this.parentNode.dataset.id);
  }

  function triggerRiverRemove() {
    const river = +this.parentNode.dataset.id;

    const message = 'Are you sure you want to remove the river? <br>All tributaries will be auto-removed';
    const onConfirm = () => {
      Rivers.remove(river);
      riversOverviewAddLines();
    };
    confirmationDialog({title: 'Remove river', message, confirm: 'Remove', onConfirm});
  }

  function triggerAllRiversRemove() {
    const message = 'Are you sure you want to remove all rivers? <br>This action cannot be reverted';
    const onConfirm = () => {
      pack.rivers = [];
      rivers.selectAll('*').remove();
      riversOverviewAddLines();
    };
    confirmationDialog({title: 'Remove all rivers', message, confirm: 'Remove', onConfirm});
  }
}