// panes/slack.js — Slack sidecar with respond form, presets, tools.
import { registerPane } from '../app.js';
import { jget, jpost, escapeHtml } from '../lib/api.js';
import { fmtJSON, err, ok, copyToClipboard } from '../lib/ui.js';

const TPL = `
  <div class="pane-head">
    <div><div class="title">Slack</div><div class="sub">Sidecar health, conversation memory, ad-hoc responses.</div></div>
    <div class="grow"></div>
    <span class="pill" id="slack-pill"><span class="dot"></span><span id="slack-pill-text">—</span></span>
    <button class="btn btn-secondary" id="slack-refresh">Refresh</button>
  </div>

  <div class="grid cols-2 mb-3">
    <div class="card">
      <div class="card-title"><h2>Respond</h2><span class="muted xsmall" id="slack-resp-meta">—</span></div>
      <form id="slack-form" class="grid gap-3">
        <label class="field">
          <span class="lbl">Message</span>
          <textarea class="input" id="slack-text" rows="3" required placeholder="Hello team!"></textarea>
        </label>
        <div class="grid cols-2 gap-3">
          <label class="field"><span class="lbl">Channel</span><input class="input" id="slack-channel" placeholder="rest" value="rest"/></label>
          <label class="field"><span class="lbl">Thread ts</span><input class="input" id="slack-thread" placeholder="rest" value="rest"/></label>
        </div>
        <div class="btn-row">
          <button class="btn btn-primary" type="submit">Generate reply</button>
          <button type="button" class="btn btn-secondary" data-preset="standup">Standup</button>
          <button type="button" class="btn btn-secondary" data-preset="bug">Bug report</button>
          <button type="button" class="btn btn-secondary" data-preset="ship">Ship update</button>
        </div>
      </form>
      <div class="divider"></div>
      <div class="card-title"><h2 style="font-size:14px">Reply</h2><button class="btn btn-ghost" id="slack-copy">Copy</button></div>
      <pre id="slack-reply" class="code muted" style="max-height:24vh">—</pre>
    </div>

    <div class="card">
      <div class="card-title"><h2>Tools</h2><span class="muted xsmall" id="slack-tools-meta">—</span></div>
      <div id="slack-tools-list" class="scroll" style="max-height:22vh">…</div>

      <div class="divider"></div>
      <div class="card-title"><h2 style="font-size:14px">Conversation memory</h2>
        <button class="btn btn-ghost" id="slack-mem-copy">Copy</button>
      </div>
      <pre id="slack-memory" class="code muted" style="max-height:28vh">…</pre>
    </div>
  </div>

  <div class="grid cols-2">
    <div class="card">
      <div class="card-title"><h2>healthz</h2></div>
      <pre id="slack-health" class="code" style="max-height:24vh">…</pre>
    </div>
    <div class="card">
      <div class="card-title"><h2>info</h2></div>
      <pre id="slack-info" class="code" style="max-height:24vh">…</pre>
    </div>
  </div>
`;

const PRESETS = {
  standup: 'Daily standup: ✅ Yesterday — ___ · 🎯 Today — ___ · 🚧 Blockers — none',
  bug:     'Bug report: **Title** — short summary\n\n**Steps to reproduce:**\n1. ___\n2. ___\n\n**Expected:** ___\n**Actual:** ___\n**Env:** ___',
  ship:    '🚀 Shipped: **<feature>** — short summary. Try it at <link>. Feedback welcome 🙏',
};

async function refresh(host) {
  try {
    const [h, info, mem, tools] = await Promise.all([
      jget('/api/slack/healthz').catch(e => ({ error: e.message })),
      jget('/api/slack/info').catch(e => ({ error: e.message })),
      jget('/api/slack/memory').catch(e => ({ error: e.message })),
      jget('/api/slack/tools').catch(e => ({ error: e.message })),
    ]);
    host.querySelector('#slack-health').textContent = fmtJSON(h);
    host.querySelector('#slack-info').textContent = fmtJSON(info);
    host.querySelector('#slack-memory').textContent = fmtJSON(mem);
    const items = tools.tools || [];
    host.querySelector('#slack-tools-meta').textContent = `${items.length} tools`;
    host.querySelector('#slack-tools-list').innerHTML = items.length
      ? items.map(t => `<div class="row">
          <div class="grow"><div class="ttl mono">${escapeHtml(t.name)}</div><div class="desc">${escapeHtml(t.description || '')}</div></div>
        </div>`).join('')
      : '<div class="muted xsmall p-2">(none)</div>';

    const ok2 = !h?.error;
    const pill = host.querySelector('#slack-pill');
    pill.classList.remove('ok', 'err'); pill.classList.add(ok2 ? 'ok' : 'err');
    host.querySelector('#slack-pill-text').textContent = ok2 ? 'up' : 'down';
  } catch (e) {
    host.querySelector('#slack-health').textContent = e.message;
  }
}

registerPane('slack', {
  label: 'Slack',
  init(host) {
    host.innerHTML = TPL;
    host.querySelector('#slack-refresh').addEventListener('click', () => refresh(host));
    host.querySelectorAll('[data-preset]').forEach(b => b.addEventListener('click', () => {
      host.querySelector('#slack-text').value = PRESETS[b.dataset.preset] || '';
    }));
    host.querySelector('#slack-copy').addEventListener('click', () => copyToClipboard(host.querySelector('#slack-reply').textContent));
    host.querySelector('#slack-mem-copy').addEventListener('click', () => copyToClipboard(host.querySelector('#slack-memory').textContent));

    host.querySelector('#slack-form').addEventListener('submit', async (e) => {
      e.preventDefault();
      const body = {
        text: host.querySelector('#slack-text').value,
        channel: host.querySelector('#slack-channel').value || 'rest',
        thread_ts: host.querySelector('#slack-thread').value || 'rest',
      };
      host.querySelector('#slack-reply').textContent = 'thinking…';
      host.querySelector('#slack-resp-meta').textContent = '…';
      const t0 = performance.now();
      try {
        const r = await jpost('/api/slack/respond', body);
        host.querySelector('#slack-reply').textContent = r.reply || fmtJSON(r);
        host.querySelector('#slack-resp-meta').textContent = `${(performance.now() - t0).toFixed(0)}ms`;
        ok('replied');
      } catch (e) {
        host.querySelector('#slack-reply').textContent = e.body?.detail || e.message;
        host.querySelector('#slack-resp-meta').textContent = `error ${e.status ?? ''}`;
        err(e.message);
      }
    });
    refresh(host);
  },
  refresh,
});