// panes/demand.js — cxai-demand jobs with presets, live polling, report viewer.
import { registerPane } from '../app.js';
import { jget, jpost, escapeHtml, statusClass } from '../lib/api.js';
import { ok, err, fmtJSON, copyToClipboard } from '../lib/ui.js';

const PRESETS = {
  lite:       { designs_per_run: 1, top_trends: 5,  variations_per_trend: 1, min_score: 0.7, quantum: false },
  normal:     { designs_per_run: 3, top_trends: 10, variations_per_trend: 2, min_score: 0.6, quantum: false },
  aggressive: { designs_per_run: 10,top_trends: 25, variations_per_trend: 4, min_score: 0.4, quantum: true  },
};

const TPL = `
  <div class="pane-head">
    <div><div class="title">Demand</div><div class="sub">Trend-driven design jobs.</div></div>
    <div class="grow"></div>
    <label class="check"><input type="checkbox" id="demand-auto" checked/> auto-refresh (5s)</label>
    <button class="btn btn-secondary" id="demand-refresh">Refresh</button>
  </div>

  <div class="grid cols-4 mb-3" id="demand-kpis"></div>

  <div class="grid cols-2 mb-3">
    <div class="card">
      <div class="card-title"><h2>Run config</h2><span class="muted xsmall" id="demand-status">—</span></div>
      <div class="chips mb-3">
        <button class="chip" data-preset="lite" type="button">Lite</button>
        <button class="chip" data-preset="normal" type="button">Normal</button>
        <button class="chip" data-preset="aggressive" type="button">Aggressive</button>
      </div>
      <form id="demand-form" class="grid cols-2 gap-3">
        <label class="field"><span class="lbl">Designs / run</span><input class="input" id="demand-count" type="number" min="1" value="3"/></label>
        <label class="field"><span class="lbl">Top trends</span><input class="input" id="demand-top" type="number" placeholder="—"/></label>
        <label class="field"><span class="lbl">Variations / trend</span><input class="input" id="demand-var" type="number" placeholder="—"/></label>
        <label class="field"><span class="lbl">Min score</span><input class="input" id="demand-min" type="number" step="0.01" placeholder="—"/></label>
        <label class="field" style="grid-column: span 2">
          <span class="lbl">Platform</span>
          <select class="input" id="demand-platform"></select>
        </label>
        <label class="check"><input type="checkbox" id="demand-dry"/> dry-run</label>
        <label class="check"><input type="checkbox" id="demand-up"/> upload</label>
        <label class="check"><input type="checkbox" id="demand-web"/> web trends</label>
        <label class="check"><input type="checkbox" id="demand-q"/> quantum</label>
        <div class="btn-row" style="grid-column: span 2">
          <button class="btn btn-primary" type="submit">Queue run</button>
          <button class="btn btn-ghost" type="reset">Clear</button>
        </div>
      </form>
    </div>

    <div class="card">
      <div class="card-title"><h2>Jobs</h2><span class="muted xsmall" id="demand-job-meta">—</span></div>
      <div id="demand-jobs" class="scroll" style="max-height:54vh">…</div>
    </div>
  </div>

  <div class="card">
    <div class="card-title"><h2>Reports</h2>
      <div class="flex gap-2"><input class="input" id="demand-rfilter" placeholder="filter…" style="max-width:200px"/>
        <button class="btn btn-ghost" id="demand-rcopy">Copy report</button></div>
    </div>
    <div class="grid cols-2 gap-3">
      <div id="demand-reports" class="scroll" style="max-height:46vh"></div>
      <pre id="demand-report-body" class="code muted" style="max-height:46vh">select a report</pre>
    </div>
  </div>
`;

function kpi(label, value, sub) {
  return `<div class="kpi"><div class="label">${escapeHtml(label)}</div><div class="value">${escapeHtml(String(value))}</div><div class="sub">${escapeHtml(sub || '')}</div></div>`;
}
function num(v) { if (v === '' || v == null) return null; const n = +v; return Number.isFinite(n) ? n : null; }

let allReports = [];

async function loadJobs(host) {
  try {
    const r = await jget('/api/demand/runs');
    const jobs = r.jobs || [];
    host.querySelector('#demand-job-meta').textContent = `${jobs.length} total`;
    host.querySelector('#demand-jobs').innerHTML = jobs.length ? jobs.map(j => {
      const dur = j.finished_at && j.started_at ? `${(j.finished_at - j.started_at).toFixed(1)}s`
                : (j.status === 'running' ? '…' : '—');
      const cancelBtn = j.status === 'running'
        ? `<button class="act" data-cancel="${escapeHtml(j.id)}">cancel</button>` : '';
      return `<div class="row">
        <span class="mono muted xsmall">${escapeHtml(j.id)}</span>
        <span class="pill ${statusClass(j.status)}">${escapeHtml(j.status)}</span>
        <span class="muted mono xsmall">${dur}</span>
        <div class="grow desc truncate">${escapeHtml(j.report_path || j.error || '')}</div>
        ${cancelBtn}
      </div>`;
    }).join('') : '<div class="muted" style="padding:12px">no jobs yet</div>';

    host.querySelectorAll('[data-cancel]').forEach(b => b.addEventListener('click', async () => {
      try { await jpost(`/api/demand/runs/${b.dataset.cancel}/cancel`, {}); ok('cancel requested'); loadJobs(host); }
      catch (e) { err(e.message); }
    }));

    const running = jobs.filter(j => j.status === 'running').length;
    const success = jobs.filter(j => j.status === 'success' || j.status === 'completed').length;
    const failed  = jobs.filter(j => (j.status || '').includes('fail') || (j.status || '').includes('error')).length;
    host.querySelector('#demand-kpis').innerHTML = [
      kpi('Jobs',     jobs.length, 'all time'),
      kpi('Running',  running,     'now'),
      kpi('Success',  success,     'completed'),
      kpi('Failed',   failed,      'errors'),
    ].join('');
  } catch (e) {
    host.querySelector('#demand-jobs').innerHTML = `<div class="muted">${escapeHtml(e.message)}</div>`;
  }
}

function renderReports(host) {
  const q = host.querySelector('#demand-rfilter').value.trim().toLowerCase();
  const items = allReports.filter(it => !q || it.name.toLowerCase().includes(q));
  host.querySelector('#demand-reports').innerHTML = items.length
    ? items.map(it => `<div class="row">
        <a href="#" data-name="${escapeHtml(it.name)}" class="report-link grow truncate">${escapeHtml(it.name)}</a>
        <span class="muted mono xsmall">${it.size}b</span>
      </div>`).join('')
    : '<div class="muted xsmall p-2">no reports</div>';
  host.querySelectorAll('.report-link').forEach(b => b.addEventListener('click', async (e) => {
    e.preventDefault();
    try { host.querySelector('#demand-report-body').textContent = fmtJSON(await jget('/api/demand/reports/' + b.dataset.name)); }
    catch (err2) { host.querySelector('#demand-report-body').textContent = err2.message; }
  }));
}

async function loadReports(host) {
  try {
    const r = await jget('/api/demand/reports');
    allReports = r.reports || [];
    renderReports(host);
  } catch (e) {
    host.querySelector('#demand-reports').innerHTML = `<div class="muted">${escapeHtml(e.message)}</div>`;
  }
}

async function refresh(host) {
  try {
    const platforms = (await jget('/api/demand/platforms')).platforms || [];
    const sel = host.querySelector('#demand-platform');
    if (sel && sel.children.length === 0) {
      sel.innerHTML = `<option value="">(default)</option>` + platforms.map(p => `<option value="${p}">${p}</option>`).join('');
    }
    await loadJobs(host); await loadReports(host);
  } catch (e) {
    host.querySelector('#demand-status').textContent = 'upstream unavailable: ' + e.message;
  }
}

let timer = null;
registerPane('demand', {
  label: 'Demand',
  init(host) {
    host.innerHTML = TPL;
    host.querySelector('#demand-refresh').addEventListener('click', () => refresh(host));
    host.querySelector('#demand-rfilter').addEventListener('input', () => renderReports(host));
    host.querySelector('#demand-rcopy').addEventListener('click', () => copyToClipboard(host.querySelector('#demand-report-body').textContent));

    host.querySelectorAll('[data-preset]').forEach(b => b.addEventListener('click', () => {
      const p = PRESETS[b.dataset.preset]; if (!p) return;
      host.querySelector('#demand-count').value = p.designs_per_run;
      host.querySelector('#demand-top').value   = p.top_trends;
      host.querySelector('#demand-var').value   = p.variations_per_trend;
      host.querySelector('#demand-min').value   = p.min_score;
      host.querySelector('#demand-q').checked   = p.quantum;
    }));

    host.querySelector('#demand-form').addEventListener('submit', async (e) => {
      e.preventDefault();
      const body = {
        designs_per_run: +host.querySelector('#demand-count').value || 0,
        top_trends: num(host.querySelector('#demand-top').value),
        variations_per_trend: num(host.querySelector('#demand-var').value),
        min_score: num(host.querySelector('#demand-min').value),
        platform: host.querySelector('#demand-platform').value || null,
        dry_run: host.querySelector('#demand-dry').checked,
        upload: host.querySelector('#demand-up').checked,
        web_trends: host.querySelector('#demand-web').checked,
        quantum: host.querySelector('#demand-q').checked,
      };
      try {
        const r = await jpost('/api/demand/runs', body);
        host.querySelector('#demand-status').textContent = `queued: ${r.job_id}`;
        ok(`queued ${r.job_id}`);
        await loadJobs(host);
      } catch (e) { host.querySelector('#demand-status').textContent = 'error: ' + e.message; err(e.message); }
    });

    refresh(host);
    timer = setInterval(() => {
      if (!host.classList.contains('active')) return;
      if (!host.querySelector('#demand-auto')?.checked) return;
      loadJobs(host);
    }, 5000);
  },
  refresh,
});