'use strict';
function editRegiment(selector) {
  if (customization) return;
  closeDialogs('.stable');
  if (!layerIsOn('toggleMilitary')) toggleMilitary();

  armies.selectAll(':scope > g').classed('draggable', true);
  armies.selectAll(':scope > g > g').call(d3.drag().on('drag', dragRegiment));
  elSelected = selector ? document.querySelector(selector) : d3.event.target.parentElement; // select g element
  if (!pack.states[elSelected.dataset.state]) return;
  if (!regiment()) return;
  updateRegimentData(regiment());
  drawBase();

  $('#regimentEditor').dialog({
    title: 'Edit Regiment',
    resizable: false,
    close: closeEditor,
    position: {my: 'left top', at: 'left+10 top+10', of: '#map'}
  });

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

  // add listeners
  document.getElementById('regimentNameRestore').addEventListener('click', restoreName);
  document.getElementById('regimentType').addEventListener('click', changeType);
  document.getElementById('regimentName').addEventListener('change', changeName);
  document.getElementById('regimentEmblem').addEventListener('input', changeEmblem);
  document.getElementById('regimentEmblemSelect').addEventListener('click', selectEmblem);
  document.getElementById('regimentAttack').addEventListener('click', toggleAttack);
  document.getElementById('regimentRegenerateLegend').addEventListener('click', regenerateLegend);
  document.getElementById('regimentLegend').addEventListener('click', editLegend);
  document.getElementById('regimentSplit').addEventListener('click', splitRegiment);
  document.getElementById('regimentAdd').addEventListener('click', toggleAdd);
  document.getElementById('regimentAttach').addEventListener('click', toggleAttach);
  document.getElementById('regimentRemove').addEventListener('click', removeRegiment);

  // get regiment data element
  function regiment() {
    return pack.states[elSelected.dataset.state].military.find((r) => r.i == elSelected.dataset.id);
  }

  function updateRegimentData(regiment) {
    document.getElementById('regimentType').className = regiment.n ? 'icon-anchor' : 'icon-users';
    document.getElementById('regimentName').value = regiment.name;
    document.getElementById('regimentEmblem').value = regiment.icon;
    const composition = document.getElementById('regimentComposition');

    composition.innerHTML = options.military
      .map((u) => {
        return `<div data-tip="${capitalize(u.name)} number. Input to change">
        <div class="label">${capitalize(u.name)}:</div>
        <input data-u="${u.name}" type="number" min=0 step=1 value="${regiment.u[u.name] || 0}">
        <i>${u.type}</i></div>`;
      })
      .join('');

    composition.querySelectorAll('input').forEach((el) => el.addEventListener('change', changeUnit));
  }

  function drawBase() {
    const reg = regiment();
    const clr = pack.states[elSelected.dataset.state].color;
    const base = viewbox.insert('g', 'g#armies').attr('id', 'regimentBase').attr('stroke-width', 0.3).attr('stroke', '#000').attr('cursor', 'move');
    base
      .on('mouseenter', () => {
        tip('Regiment base. Drag to re-base the regiment', true);
      })
      .on('mouseleave', () => {
        tip('', true);
      });

    base.append('line').attr('x1', reg.bx).attr('y1', reg.by).attr('x2', reg.x).attr('y2', reg.y).attr('class', 'dragLine');
    base.append('circle').attr('cx', reg.bx).attr('cy', reg.by).attr('r', 2).attr('fill', clr).call(d3.drag().on('drag', dragBase));
  }

  function changeType() {
    const reg = regiment();
    reg.n = +!reg.n;
    document.getElementById('regimentType').className = reg.n ? 'icon-anchor' : 'icon-users';

    const size = +armies.attr('box-size');
    const baseRect = elSelected.querySelectorAll('rect')[0];
    const iconRect = elSelected.querySelectorAll('rect')[1];
    const icon = elSelected.querySelector('.regimentIcon');
    const x = reg.n ? reg.x - size * 2 : reg.x - size * 3;
    baseRect.setAttribute('x', x);
    baseRect.setAttribute('width', reg.n ? size * 4 : size * 6);
    iconRect.setAttribute('x', x - size * 2);
    icon.setAttribute('x', x - size);
    elSelected.querySelector('text').innerHTML = Military.getTotal(reg);
  }

  function changeName() {
    elSelected.dataset.name = regiment().name = this.value;
  }

  function restoreName() {
    const reg = regiment(),
      regs = pack.states[elSelected.dataset.state].military;
    const name = Military.getName(reg, regs);
    elSelected.dataset.name = reg.name = document.getElementById('regimentName').value = name;
  }

  function selectEmblem() {
    selectIcon(regimentEmblem.value, (v) => {
      regimentEmblem.value = v;
      changeEmblem();
    });
  }

  function changeEmblem() {
    const emblem = document.getElementById('regimentEmblem').value;
    regiment().icon = elSelected.querySelector('.regimentIcon').innerHTML = emblem;
  }

  function changeUnit() {
    const u = this.dataset.u;
    const reg = regiment();
    reg.u[u] = +this.value || 0;
    reg.a = d3.sum(Object.values(reg.u));
    elSelected.querySelector('text').innerHTML = Military.getTotal(reg);
    if (militaryOverviewRefresh.offsetParent) militaryOverviewRefresh.click();
    if (regimentsOverviewRefresh.offsetParent) regimentsOverviewRefresh.click();
  }

  function splitRegiment() {
    const reg = regiment(),
      u1 = reg.u;
    const state = +elSelected.dataset.state,
      military = pack.states[state].military;
    const i = last(military).i + 1,
      u2 = Object.assign({}, u1); // u clone

    Object.keys(u2).forEach((u) => (u2[u] = Math.floor(u2[u] / 2))); // halved new reg
    const a = d3.sum(Object.values(u2)); // new reg total
    if (!a) {
      tip('Not enough forces to split', false, 'error');
      return;
    } // nothing to add

    // update old regiment
    Object.keys(u1).forEach((u) => (u1[u] = Math.ceil(u1[u] / 2))); // halved old reg
    reg.a = d3.sum(Object.values(u1)); // old reg total
    regimentComposition.querySelectorAll('input').forEach((el) => (el.value = reg.u[el.dataset.u] || 0));
    elSelected.querySelector('text').innerHTML = Military.getTotal(reg);

    // create new regiment
    const shift = +armies.attr('box-size') * 2;
    const y = function (x, y) {
      do {
        y += shift;
      } while (military.find((r) => r.x === x && r.y === y));
      return y;
    };
    const newReg = {a, cell: reg.cell, i, n: reg.n, u: u2, x: reg.x, y: y(reg.x, reg.y), bx: reg.bx, by: reg.by, state, icon: reg.icon};
    newReg.name = Military.getName(newReg, military);
    military.push(newReg);
    Military.generateNote(newReg, pack.states[state]); // add legend
    Military.drawRegiment(newReg, state); // draw new reg below

    if (regimentsOverviewRefresh.offsetParent) regimentsOverviewRefresh.click();
  }

  function toggleAdd() {
    document.getElementById('regimentAdd').classList.toggle('pressed');
    if (document.getElementById('regimentAdd').classList.contains('pressed')) {
      viewbox.style('cursor', 'crosshair').on('click', addRegimentOnClick);
      tip('Click on map to create new regiment or fleet', true);
    } else {
      clearMainTip();
      viewbox.on('click', clicked).style('cursor', 'default');
    }
  }

  function addRegimentOnClick() {
    const point = d3.mouse(this);
    const cell = findCell(point[0], point[1]);
    const x = pack.cells.p[cell][0],
      y = pack.cells.p[cell][1];
    const state = +elSelected.dataset.state,
      military = pack.states[state].military;
    const i = military.length ? last(military).i + 1 : 0;
    const n = +(pack.cells.h[cell] < 20); // naval or land
    const reg = {a: 0, cell, i, n, u: {}, x, y, bx: x, by: y, state, icon: '🛡️'};
    reg.name = Military.getName(reg, military);
    military.push(reg);
    Military.generateNote(reg, pack.states[state]); // add legend
    Military.drawRegiment(reg, state);
    if (regimentsOverviewRefresh.offsetParent) regimentsOverviewRefresh.click();
    toggleAdd();
  }

  function toggleAttack() {
    document.getElementById('regimentAttack').classList.toggle('pressed');
    if (document.getElementById('regimentAttack').classList.contains('pressed')) {
      viewbox.style('cursor', 'crosshair').on('click', attackRegimentOnClick);
      tip('Click on another regiment to initiate battle', true);
      armies.selectAll(':scope > g').classed('draggable', false);
    } else {
      clearMainTip();
      armies.selectAll(':scope > g').classed('draggable', true);
      viewbox.on('click', clicked).style('cursor', 'default');
    }
  }

  function attackRegimentOnClick() {
    const target = d3.event.target,
      regSelected = target.parentElement,
      army = regSelected.parentElement;
    const oldState = +elSelected.dataset.state,
      newState = +regSelected.dataset.state;

    if (army.parentElement.id !== 'armies') {
      tip('Please click on a regiment to attack', false, 'error');
      return;
    }
    if (regSelected === elSelected) {
      tip('Regiment cannot attack itself', false, 'error');
      return;
    }
    if (oldState === newState) {
      tip('Cannot attack fraternal regiment', false, 'error');
      return;
    }

    const attacker = regiment();
    const defender = pack.states[regSelected.dataset.state].military.find((r) => r.i == regSelected.dataset.id);
    if (!attacker.a || !defender.a) {
      tip('Regiment has no troops to battle', false, 'error');
      return;
    }

    // save initial position to temp attribute
    (attacker.px = attacker.x), (attacker.py = attacker.y);
    (defender.px = defender.x), (defender.py = defender.y);

    // move attacker to defender
    Military.moveRegiment(attacker, defender.x, defender.y - 8);

    // draw battle icon
    const attack = d3
      .transition()
      .delay(300)
      .duration(700)
      .ease(d3.easeSinInOut)
      .on('end', () => new Battle(attacker, defender));
    svg
      .append('text')
      .attr('x', window.innerWidth / 2)
      .attr('y', window.innerHeight / 2)
      .text('⚔️')
      .attr('font-size', 0)
      .attr('opacity', 1)
      .style('dominant-baseline', 'central')
      .style('text-anchor', 'middle')
      .transition(attack)
      .attr('font-size', 1000)
      .attr('opacity', 0.2)
      .remove();

    clearMainTip();
    $('#regimentEditor').dialog('close');
  }

  function toggleAttach() {
    document.getElementById('regimentAttach').classList.toggle('pressed');
    if (document.getElementById('regimentAttach').classList.contains('pressed')) {
      viewbox.style('cursor', 'crosshair').on('click', attachRegimentOnClick);
      tip('Click on another regiment to unite both regiments. The current regiment will be removed', true);
      armies.selectAll(':scope > g').classed('draggable', false);
    } else {
      clearMainTip();
      armies.selectAll(':scope > g').classed('draggable', true);
      viewbox.on('click', clicked).style('cursor', 'default');
    }
  }

  function attachRegimentOnClick() {
    const target = d3.event.target,
      regSelected = target.parentElement,
      army = regSelected.parentElement;
    const oldState = +elSelected.dataset.state,
      newState = +regSelected.dataset.state;

    if (army.parentElement.id !== 'armies') return tip('Please click on a regiment', false, 'error');
    if (regSelected === elSelected) return tip('Cannot attach regiment to itself. Please click on another regiment', false, 'error');

    const reg = regiment(); // reg to be attached
    const sel = pack.states[newState].military.find((r) => r.i == regSelected.dataset.id); // reg to attach to

    for (const unit of options.military) {
      const u = unit.name;
      if (reg.u[u]) sel.u[u] ? (sel.u[u] += reg.u[u]) : (sel.u[u] = reg.u[u]);
    }
    sel.a = d3.sum(Object.values(sel.u)); // reg total
    regSelected.querySelector('text').innerHTML = Military.getTotal(sel); // update selected reg total text

    // remove attached regiment
    const military = pack.states[oldState].military;
    military.splice(military.indexOf(reg), 1);
    const index = notes.findIndex((n) => n.id === elSelected.id);
    if (index != -1) notes.splice(index, 1);
    elSelected.remove();

    if (regimentsOverviewRefresh.offsetParent) regimentsOverviewRefresh.click();
    $('#regimentEditor').dialog('close');
    editRegiment('#' + regSelected.id);
  }

  function regenerateLegend() {
    const index = notes.findIndex((n) => n.id === elSelected.id);
    if (index != -1) notes.splice(index, 1);

    const s = pack.states[elSelected.dataset.state];
    Military.generateNote(regiment(), s);
  }

  function editLegend() {
    editNotes(elSelected.id, regiment().name);
  }

  function removeRegiment() {
    const message = 'Are you sure you want to remove the regiment? <br>This action cannot be reverted';
    const onConfirm = () => {
      const military = pack.states[elSelected.dataset.state].military;
      const regIndex = military.indexOf(regiment());
      if (regIndex === -1) return;
      military.splice(regIndex, 1);

      const index = notes.findIndex((n) => n.id === elSelected.id);
      if (index != -1) notes.splice(index, 1);
      elSelected.remove();

      if (militaryOverviewRefresh.offsetParent) militaryOverviewRefresh.click();
      if (regimentsOverviewRefresh.offsetParent) regimentsOverviewRefresh.click();
      $('#regimentEditor').dialog('close');
    };
    confirmationDialog({title: 'Remove regiment', message, confirm: 'Remove', onConfirm});
  }

  function dragRegiment() {
    d3.select(this).raise();
    d3.select(this.parentNode).raise();

    const reg = pack.states[this.dataset.state].military.find((r) => r.i == this.dataset.id);
    const size = +armies.attr('box-size');
    const w = reg.n ? size * 4 : size * 6;
    const h = size * 2;
    const x1 = (x) => rn(x - w / 2, 2);
    const y1 = (y) => rn(y - size, 2);

    const baseRect = this.querySelector('rect');
    const text = this.querySelector('text');
    const iconRect = this.querySelectorAll('rect')[1];
    const icon = this.querySelector('.regimentIcon');

    const self = elSelected === this;
    const baseLine = viewbox.select('g#regimentBase > line');

    d3.event.on('drag', function () {
      const x = (reg.x = d3.event.x),
        y = (reg.y = d3.event.y);

      baseRect.setAttribute('x', x1(x));
      baseRect.setAttribute('y', y1(y));
      text.setAttribute('x', x);
      text.setAttribute('y', y);
      iconRect.setAttribute('x', x1(x) - h);
      iconRect.setAttribute('y', y1(y));
      icon.setAttribute('x', x1(x) - size);
      icon.setAttribute('y', y);
      if (self) baseLine.attr('x2', x).attr('y2', y);
    });
  }

  function dragBase() {
    const baseLine = viewbox.select('g#regimentBase > line');
    const reg = regiment();

    d3.event.on('drag', function () {
      this.setAttribute('cx', d3.event.x);
      this.setAttribute('cy', d3.event.y);
      baseLine.attr('x1', d3.event.x).attr('y1', d3.event.y);
    });

    d3.event.on('end', function () {
      reg.bx = d3.event.x;
      reg.by = d3.event.y;
    });
  }

  function closeEditor() {
    armies.selectAll(':scope > g').classed('draggable', false);
    armies.selectAll('g>g').call(d3.drag().on('drag', null));
    viewbox.selectAll('g#regimentBase').remove();
    document.getElementById('regimentAdd').classList.remove('pressed');
    document.getElementById('regimentAttack').classList.remove('pressed');
    document.getElementById('regimentAttach').classList.remove('pressed');
    restoreDefaultEvents();
    elSelected = null;
  }
}