// Team Grants client.
(function () {
  'use strict';
  var $ = function (id) { return document.getElementById(id); };
  function esc(s) {
    return String(s == null ? '' : s).replace(/[&<>"']/g, function (c) {
      return { '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;' }[c];
    });
  }
  function n(v) { return Number(v || 0).toLocaleString(); }

  var state = { tool: null, status: null, level: 0, minLevel: 7 };

  function gate(msg) {
    $('gGate').style.display = 'block';
    $('gGate').innerHTML = msg;
  }

  // Shown to everyone, including people below level 7 — being helped should be
  // visible, not silent.
  function renderReceived(received) {
    var keys = Object.keys(received || {});
    if (!keys.length) { $('gGot').innerHTML = ''; return; }
    var parts = keys.map(function (k) {
      var r = received[k];
      var who = r.from.map(function (f) { return '#' + f.by; });
      var uniq = who.filter(function (v, i) { return who.indexOf(v) === i; });
      var t = (state.status && state.status.tools[k]) || {};
      return '<div>· <b style="color:var(--text)">' + n(r.total) + ' ' + esc(t.unit || k) +
        '</b> of ' + esc((t.label || k).toLowerCase()) + ', from ' + uniq.join(', ') + '</div>';
    });
    $('gGot').innerHTML = '<div class="g-got"><b style="color:var(--teal)">Someone above you topped you up this month.</b>' +
      parts.join('') + '<div style="color:var(--muted);font-size:12.5px;margin-top:6px">' +
      'It is already added to your allowances — nothing to claim.</div></div>';
  }

  function renderPools() {
    var host = $('gPools');
    host.innerHTML = '';
    var tools = state.status.tools;
    Object.keys(tools).forEach(function (k) {
      var t = tools[k];
      var d = document.createElement('div');
      d.className = 'g-pool' + (state.tool === k ? ' on' : '');
      d.innerHTML = '<div class="big">' + n(t.remaining) + '</div>' +
        '<div class="lab">' + esc(t.label) + '</div>' +
        '<div class="of">left to give of ' + n(t.pool) + '</div>';
      d.addEventListener('click', function () {
        state.tool = k;
        renderPools();
        var el = $('gN');
        el.max = Math.min(t.max, t.remaining);
        el.step = t.step;
        el.value = Math.min(t.step, t.remaining) || '';
        $('gNHint').textContent = 'Up to ' + n(Math.min(t.max, t.remaining)) + ' ' + t.unit +
          ' in one go. You have ' + n(t.remaining) + ' left to give this month.';
      });
      host.appendChild(d);
    });
  }

  function renderHistory(hist) {
    if (!hist || !hist.length) { $('gHistWrap').style.display = 'none'; return; }
    $('gHistWrap').style.display = 'block';
    var tb = $('gHist');
    tb.innerHTML = '';
    hist.forEach(function (h) {
      var t = (state.status.tools[h.tool]) || {};
      var tr = document.createElement('tr');
      tr.innerHTML = '<td><b>#' + esc(h.to) + '</b></td>' +
        '<td>' + esc(t.label || h.tool) + '</td>' +
        '<td><b>' + n(h.n) + '</b> ' + esc(t.unit || '') + '</td>' +
        '<td>' + esc(String(h.at || '').slice(0, 10)) + '</td>';
      tb.appendChild(tr);
    });
  }

  async function give() {
    $('gErr').style.display = 'none';
    $('gOk').style.display = 'none';
    if (!state.tool) {
      $('gErr').textContent = 'Pick what you want to give first.';
      $('gErr').style.display = 'block';
      return;
    }
    var to = Number($('gTo').value) || 0;
    var amount = Number($('gN').value) || 0;
    if (!to) {
      $('gErr').textContent = 'Enter the position number you want to help.';
      $('gErr').style.display = 'block';
      return;
    }
    $('gGo').disabled = true;
    $('gGo').innerHTML = '<span class="spin"></span>Sending…';
    try {
      var r = await fetch('/api/public/suite-grants', {
        method: 'POST', headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ to: to, tool: state.tool, n: amount })
      });
      var d = await r.json();
      if (!r.ok) {
        $('gErr').textContent = d.error || 'That did not go through.';
        $('gErr').style.display = 'block';
      } else {
        state.status = d.status;
        var t = state.status.tools[d.granted.tool] || {};
        $('gOk').innerHTML = '✅ <b>Sent.</b> #' + esc(d.granted.to) + ' now has ' + n(d.granted.n) + ' more ' +
          esc(t.unit || '') + ' this month. Worth telling them — it will just appear in their allowance otherwise.';
        $('gOk').style.display = 'block';
        renderPools();
        renderHistory(state.status.history);
      }
    } catch (e) {
      $('gErr').textContent = 'Connection hiccup — try again.';
      $('gErr').style.display = 'block';
    }
    $('gGo').disabled = false;
    $('gGo').innerHTML = '🎁 Give it to them';
  }

  async function boot() {
    try {
      var r = await fetch('/api/public/suite-grants');
      if (r.status === 401) { gate('You’re not signed in yet. <a href="/suite" style="color:var(--gold);font-weight:700">Open the Suite</a> and connect the wallet that holds your position, then come back.'); return; }
      if (r.status === 403) {
        var g = await r.json();
        gate((g.error || 'Not open for this position yet.') + ' <a href="/suite" style="color:var(--gold);font-weight:700">See your Suite</a>.');
        return;
      }
      if (!r.ok) return;
      var d = await r.json();
      state.status = d.status;
      state.level = d.level;
      state.minLevel = d.minLevel;

      renderReceived(d.status.received);

      if (!d.status.canGrant) {
        gate('<b>Team Grants unlock at Vertex (level 7).</b> At that point you can hand your own Suite capacity ' +
          'down to anyone in your organisation who needs it. Anything granted <em>to</em> you shows above and is already in your allowances.');
        return;
      }
      $('gBody').style.display = 'block';
      var first = Object.keys(d.status.tools)[0];
      state.tool = first;
      renderPools();
      var t = d.status.tools[first];
      $('gN').max = Math.min(t.max, t.remaining);
      $('gN').step = t.step;
      $('gN').value = Math.min(t.step, t.remaining) || '';
      $('gNHint').textContent = 'Up to ' + n(Math.min(t.max, t.remaining)) + ' ' + t.unit + ' in one go.';
      renderHistory(d.status.history);
    } catch (e) {}
  }

  document.addEventListener('DOMContentLoaded', function () {
    boot();
    $('gGo').addEventListener('click', give);
  });
})();