import { state, savePrefs } from './state.js';
import { tr } from './i18n.js';
import { api } from './api.js';
import { tOff, o2d, dTot, fd, fs, editable, now, heuteColor, isCollapsed, toggleCollapse, calc, dcls, dlbl } from './goals.js';
import { tpl, showToast } from './ui.js';

function saveGoal(g) {
  api('PATCH', 'goals/' + g.id, {
    name: g.name, unit: g.unit, daily: g.daily, days: g.days, start: g.start, sets: g.sets,
  }).catch(e => {
    if (e.status !== 401) showToast(tr('errSave'));
  });
}

function addSet(gid, off) {
  const g = state.goals.find(x => x.id === gid);
  if (!g || !editable(g, off)) return;
  const k = gid + '_' + off, amt = parseInt(state.addAmt[k] || '0', 10);
  if (amt <= 0) return;
  if (!g.sets[String(off)]) g.sets[String(off)] = [];
  g.sets[String(off)].push({ amount: amt, time: off === tOff(g) ? now() : '—' });
  state.addAmt[k] = ''; saveGoal(g); render();
}

function remSet(gid, off, idx) {
  const g = state.goals.find(x => x.id === gid);
  if (!g || !editable(g, off)) return;
  g.sets[String(off)].splice(idx, 1); saveGoal(g); render();
}

function delGoal(id) {
  if (!confirm(tr('confirmDelete'))) return;
  state.goals = state.goals.filter(g => g.id !== id);
  render();
  api('DELETE', 'goals/' + id).catch(() => showToast(tr('errDelete')));
}

function selD(gid, off) {
  const g = state.goals.find(x => x.id === gid);
  if (!g) return;
  state.selDay[gid] = state.selDay[gid] === off ? null : off;
  render();
}

function startRen(id) {
  const g = state.goals.find(x => x.id === id); if (!g) return;
  state.renamingId = id; state.renameVal = g.name; render();
  setTimeout(() => { const el = document.getElementById('ri' + id); if (el) { el.focus(); el.select(); } }, 50);
}

function commitRen(id) {
  const g = state.goals.find(x => x.id === id);
  if (g && state.renameVal.trim()) { g.name = state.renameVal.trim(); saveGoal(g); }
  state.renamingId = null; render();
}

function cancelRen() { state.renamingId = null; render(); }

function buildNameWrap(g) {
  if (state.renamingId === g.id) {
    const el = tpl('tpl-name-edit');
    const inp = el.querySelector('.ren-input');
    inp.id = 'ri' + g.id; inp.value = g.name; inp.dataset.g = g.id;
    return el;
  }
  const el = tpl('tpl-name-view');
  el.querySelector('.goal-name').textContent = g.name;
  el.querySelector('.btn-ren').dataset.g = g.id;
  return el;
}

function buildPanel(g, off) {
  const t = tOff(g), sets = g.sets[String(off)] || [], tot = dTot(g, off), ed = editable(g, off);
  const lbl = off === t ? tr('heute') : off === t - 1 ? tr('gestern') : null;
  const k = g.id + '_' + off;
  const el = tpl('tpl-panel');
  el.querySelector('.dpanel-title').textContent = (lbl ? lbl + ' — ' : '') + fd(o2d(g, off));
  el.querySelector('.dpanel-sub').textContent = tot + ' / ' + g.daily + ' ' + g.unit;
  const body = el.querySelector('.dpanel-body');
  if (sets.length) {
    for (let i = 0; i < sets.length; i++) {
      const s = sets[i], row = tpl('tpl-set-row'), span = row.querySelector('span');
      if (s.time !== '—') {
        const st = document.createElement('span'); st.className = 'stime'; st.textContent = s.time + ' ·';
        span.appendChild(st); span.appendChild(document.createTextNode(' '));
      }
      const strong = document.createElement('strong'); strong.textContent = s.amount;
      span.appendChild(strong); span.appendChild(document.createTextNode(' ' + g.unit));
      const btn = row.querySelector('.sdel');
      if (ed) { btn.dataset.g = g.id; btn.dataset.o = off; btn.dataset.i = i; } else { btn.remove(); }
      body.appendChild(row);
    }
  } else {
    body.appendChild(tpl('tpl-nosets'));
  }
  if (ed) {
    const addRow = tpl('tpl-add-row');
    const inp = addRow.querySelector('.num-in');
    inp.placeholder = g.daily; inp.value = state.addAmt[k] || ''; inp.dataset.k = k; inp.dataset.g = g.id; inp.dataset.o = off;
    const abtn = addRow.querySelector('.btn-as');
    abtn.dataset.g = g.id; abtn.dataset.o = off;
    addRow.querySelector('.ulbl').textContent = g.unit;
    body.appendChild(addRow);
  }
  return el;
}

function buildCard(g) {
  const c = calc(g), t = c.tOff;
  const fc = c.surplus > 0 ? 'var(--blue)' : c.st === 0 && c.buf >= 0 ? 'var(--green)' : c.dailyDelta <= 0 ? 'var(--green)' : c.dailyDelta <= g.daily * .2 ? 'var(--amber)' : 'var(--red)';
  let bc, bt;
  const bufStr = (c.buf > 0 ? '+' : '') + c.buf;
  if (c.ok && c.surplus > 0) { bc = 'b-buf'; bt = bufStr; }
  else if (c.ok && c.buf >= 0) { bc = 'b-done'; bt = bufStr; }
  else if (c.dailyDelta <= 0) { bc = 'b-ok'; bt = bufStr; }
  else if (c.dailyDelta <= g.daily * .2) { bc = 'b-warn'; bt = bufStr; }
  else { bc = 'b-danger'; bt = bufStr; }

  let el;
  if (isCollapsed(g.id)) {
    el = tpl('tpl-card-collapsed');
    if (c.ok) el.classList.add('done');
    el.querySelector('.card-hdr').dataset.g = g.id;
    const bd = el.querySelector('.card-bd');
    bd.insertBefore(buildNameWrap(g), bd.firstElementChild);
    const hc = heuteColor(c.tdone, g.daily);
    el.querySelector('.m-dr').textContent = c.dr;
    el.querySelector('.m-end').textContent = fs(c.end);
    const mH = el.querySelector('.m-heute'); mH.textContent = c.tdone + '/' + g.daily; mH.style.color = hc;
    el.querySelector('.m-total').textContent = c.done + '/' + c.tot;
    const badge = el.querySelector('.badge'); badge.className = 'badge ' + bc; badge.textContent = bt;
    const fill = el.querySelector('.prog-fill'); fill.style.width = c.pct + '%'; fill.style.background = fc;
    return el;
  }

  el = tpl('tpl-card-expanded');
  if (c.ok) el.classList.add('done');
  el.querySelector('.card-hdr').dataset.g = g.id;
  const bd = el.querySelector('.card-bd');
  bd.insertBefore(buildNameWrap(g), bd.firstElementChild);
  el.querySelector('.m-dr').textContent = c.dr;
  el.querySelector('.m-end').textContent = fs(c.end);
  const badge = el.querySelector('.badge'); badge.className = 'badge ' + bc; badge.textContent = bt;
  const fill = el.querySelector('.prog-fill'); fill.style.width = c.pct + '%'; fill.style.background = fc;
  el.querySelector('.pr-done').textContent = c.done + ' ' + g.unit + ' ' + tr('doneLabel');
  el.querySelector('.pr-pct').textContent = c.pct + '% ' + tr('ofLabel') + ' ' + c.tot;
  el.querySelector('.sv-tdone').textContent = c.tdone;
  el.querySelector('.sv-daily').textContent = g.daily;
  el.querySelector('.sv-st').textContent = c.st;
  el.querySelector('.sv-noch').style.color = heuteColor(c.tdone, g.daily);
  el.querySelectorAll('.sunit').forEach(u => { u.textContent = g.unit; });

  const sel = state.selDay[g.id] != null ? state.selDay[g.id] : t;
  const dotsWrap = el.querySelector('.dots-wrap');
  for (let i = 0; i < g.days; i++) {
    const it = i === t, iy = i === t - 1, is = sel === i, ed = editable(g, i);
    const dot = tpl('tpl-dot');
    dot.className = dcls(g, i) + (is ? ' rs' : it ? ' rt' : iy && t > 0 ? ' ry' : '');
    if (i <= t) { dot.dataset.g = g.id; dot.dataset.d = i; }
    dot.textContent = dlbl(g, i);
    dotsWrap.appendChild(dot);
  }

  if (sel != null) el.insertBefore(buildPanel(g, sel), el.querySelector('.card-foot'));
  el.querySelector('.btn-del').dataset.g = g.id;
  return el;
}

function buildQuickBook() {
  const active = state.goals.filter(g => {
    const c = calc(g);
    return tOff(g) < g.days && (c.buf < 0 || (c.tdone < g.daily && c.buf < g.daily));
  });
  if (!active.length) return null;
  const frag = document.createDocumentFragment();
  const lbl = document.createElement('div'); lbl.className = 'sec-lbl'; lbl.textContent = tr('qbLabel');
  frag.appendChild(lbl);
  const card = document.createElement('div'); card.className = 'card qb-card';
  for (const g of active) {
    const c = calc(g), k = g.id + '_' + c.tOff;
    const row = tpl('tpl-qb-row');
    row.querySelector('.qb-name').textContent = g.name;
    const stat = row.querySelector('.qb-stat'); stat.textContent = c.tdone + '/' + g.daily; stat.style.color = heuteColor(c.tdone, g.daily);
    const inp = row.querySelector('.num-in');
    inp.placeholder = g.daily; inp.value = state.addAmt[k] || ''; inp.dataset.k = k; inp.dataset.g = g.id; inp.dataset.o = c.tOff;
    const btn = row.querySelector('.btn-as'); btn.dataset.g = g.id; btn.dataset.o = c.tOff;
    card.appendChild(row);
  }
  frag.appendChild(card);
  return frag;
}

function calcAwards() {
  let units = 0;
  for (const g of state.goals) {
    if (tOff(g) >= g.days) units += Math.floor(g.days / 30);
  }
  const gold = Math.floor(units / 25); units %= 25;
  const silver = Math.floor(units / 5); const bronze = units % 5;
  return { gold, silver, bronze };
}

export function render() {
  const m = document.getElementById('main');
  const frag = document.createDocumentFragment();

  if (!state.prefs.hd) {
    const hint = tpl('tpl-hint');
    hint.querySelector('.hclose').onclick = () => { state.prefs.hd = 1; savePrefs(); hint.remove(); };
    frag.appendChild(hint);
  }

  const aw = calcAwards();
  if (aw.gold || aw.silver || aw.bronze) {
    const awards = document.createElement('div'); awards.className = 'awards';
    for (const [emoji, count] of [['🥇', aw.gold], ['🥈', aw.silver], ['🥉', aw.bronze]]) {
      for (let i = 0; i < count; i++) {
        const sp = document.createElement('span'); sp.className = 'aw'; sp.textContent = emoji;
        awards.appendChild(sp);
      }
    }
    frag.appendChild(awards);
  }

  if (!state.goals.length) {
    frag.appendChild(tpl('tpl-empty'));
    m.innerHTML = ''; m.appendChild(frag); wire(); return;
  }

  if (state.userName) {
    const gr = document.createElement('div'); gr.className = 'greeting';
    gr.textContent = tr('hello').replace('{n}', state.userName);
    frag.appendChild(gr);
  }

  const qb = buildQuickBook(); if (qb) frag.appendChild(qb);

  const open = [], done = [];
  for (const g of state.goals) {
    if (calc(g).ok) done.push(g); else open.push(g);
  }
  if (open.length) {
    const sl = document.createElement('div'); sl.className = 'sec-lbl'; sl.textContent = tr('openLabel');
    frag.appendChild(sl);
    for (const g of open) frag.appendChild(buildCard(g));
  }
  if (done.length) {
    const sl2 = document.createElement('div'); sl2.className = 'sec-lbl'; sl2.textContent = tr('doneToday');
    frag.appendChild(sl2);
    for (const g of done) frag.appendChild(buildCard(g));
  }

  m.innerHTML = ''; m.appendChild(frag); wire();
}

function wire() {
  document.querySelectorAll('.card-hdr[data-g]').forEach(el => {
    el.onclick = function(e) {
      if (e.target.classList.contains('btn-ren') || e.target.classList.contains('ren-input')) return;
      toggleCollapse(this.dataset.g); render();
    };
  });
  document.querySelectorAll('.btn-ren').forEach(b => {
    b.onclick = function(e) { e.stopPropagation(); startRen(this.dataset.g); };
  });
  document.querySelectorAll('.ren-input').forEach(inp => {
    const gid = inp.dataset.g;
    inp.oninput = function() { state.renameVal = this.value; };
    inp.onkeydown = function(e) { if (e.key === 'Enter') commitRen(gid); if (e.key === 'Escape') cancelRen(); };
    inp.onblur = function() { commitRen(gid); };
  });
  document.querySelectorAll('.de, .dl').forEach(d => {
    d.onclick = function(e) { e.stopPropagation(); selD(this.dataset.g, parseInt(this.dataset.d, 10)); };
  });
  document.querySelectorAll('.btn-as').forEach(b => {
    b.onclick = function() { addSet(this.dataset.g, parseInt(this.dataset.o, 10)); };
  });
  document.querySelectorAll('.num-in').forEach(inp => {
    const k = inp.dataset.k, g = inp.dataset.g, o = parseInt(inp.dataset.o, 10);
    inp.oninput = function() { state.addAmt[k] = this.value; };
    inp.onkeydown = function(e) { if (e.key === 'Enter') addSet(g, o); };
  });
  document.querySelectorAll('.sdel').forEach(b => {
    b.onclick = function() { remSet(this.dataset.g, parseInt(this.dataset.o, 10), parseInt(this.dataset.i, 10)); };
  });
  document.querySelectorAll('.btn-del').forEach(b => {
    b.onclick = function() { delGoal(this.dataset.g); };
  });
}