'use strict';

// ─── Tab switching ────────────────────────────────────────────────────────────
document.querySelectorAll('.tab-btn').forEach(btn => {
  btn.addEventListener('click', () => {
    const tab = btn.dataset.tab;
    document.querySelectorAll('.tab-btn').forEach(b => b.classList.remove('active'));
    document.querySelectorAll('.tab').forEach(t => t.classList.remove('active'));
    btn.classList.add('active');
    document.getElementById(`tab-${tab}`).classList.add('active');
    if (tab === 'history') loadHistory();
  });
});

// ─── Sync range ↔ number ──────────────────────────────────────────────────────
function syncRangeNumber(rangeId, numId) {
  const range = document.getElementById(rangeId);
  const num   = document.getElementById(numId);
  range.addEventListener('input', () => num.value = range.value);
  num.addEventListener('input',  () => range.value = num.value);
}
syncRangeNumber('vus',      'vus-num');
syncRangeNumber('duration', 'duration-num');

// ─── Show/hide body for non-GET ───────────────────────────────────────────────
const methodSel = document.getElementById('httpMethod');
const bodyGroup = document.getElementById('body-group');
methodSel.addEventListener('change', () => {
  bodyGroup.style.display = (methodSel.value !== 'GET' && methodSel.value !== 'HEAD') ? '' : 'none';
});

// ─── gzip hint ────────────────────────────────────────────────────────────────
const gzipChk  = document.getElementById('gzip');
const gzipHint = document.getElementById('gzip-hint');
gzipChk.addEventListener('change', () => {
  gzipHint.textContent = gzipChk.checked
    ? 'k6 default — server may compress response'
    : 'Sends Accept-Encoding: identity — forces uncompressed response';
});

// ─── Device hint ─────────────────────────────────────────────────────────────
const uaHint = document.getElementById('ua-hint');
document.querySelectorAll('input[name="device"]').forEach(radio => {
  radio.addEventListener('change', () => {
    uaHint.textContent = radio.value === 'mobile'
      ? 'iPhone Safari 17 (iOS 17.4)'
      : 'Chrome 124 on Windows';
  });
});

// ─── Gauge engine ─────────────────────────────────────────────────────────────
const CIRC = 2 * Math.PI * 50; // r=50 → 314.16

function setGauge(id, pct, color) {
  const el = document.getElementById(id);
  if (!el) return;
  const ring = el.querySelector('.gauge-ring');
  const val  = el.querySelector('.gauge-value');
  const clamped = Math.max(0, Math.min(100, pct));
  ring.style.strokeDasharray  = CIRC;
  ring.style.strokeDashoffset = CIRC * (1 - clamped / 100);
  ring.style.stroke = color;
  val.textContent = Math.round(clamped);
}

function gaugeColor(val, good, warn) {
  if (val >= good) return 'var(--green)';
  if (val >= warn) return 'var(--yellow)';
  return 'var(--red)';
}

function fmtMs(ms) {
  if (!ms || ms === 0) return '--';
  return ms >= 1000 ? (ms / 1000).toFixed(2) + 's' : Math.round(ms) + 'ms';
}

function setStat(id, val) {
  const el = document.getElementById(id);
  if (el) el.querySelector('.sc-val').textContent = val;
}

function updateGauges(m) {
  if (!m || m.totalReqs === 0) return;

  setGauge('gauge-score',  m.score,      gaugeColor(m.score,     90, 50));
  setGauge('gauge-checks', m.checksRate, gaugeColor(m.checksRate,98, 90));
  setGauge('gauge-http',   m.httpOkRate, gaugeColor(m.httpOkRate,99, 95));

  setStat('sc-reqs', m.totalReqs.toLocaleString());
  setStat('sc-rps',  m.reqPerSec + '/s');
  setStat('sc-avg',  fmtMs(m.avg));
  setStat('sc-p90',  fmtMs(m.p90));
  setStat('sc-p95',  fmtMs(m.p95));
  setStat('sc-p99',  fmtMs(m.p99));
  updateBandwidth(m);

  // colour p95 cell based on threshold (5 s)
  const p95cell = document.getElementById('sc-p95');
  if (p95cell) {
    p95cell.querySelector('.sc-val').style.color =
      m.p95 < 1000 ? 'var(--green)' : m.p95 < 3000 ? 'var(--yellow)' : 'var(--red)';
  }
}

function updateBandwidth(m) {
  const inEl   = document.getElementById('bw-in');
  const outEl  = document.getElementById('bw-out');
  const sizeEl = document.getElementById('bw-size');
  const warn   = document.getElementById('bw-warning');
  if (!inEl) return;

  inEl.textContent  = m.bwInMBps  + ' MB/s';
  outEl.textContent = m.bwOutMBps + ' MB/s';
  sizeEl.textContent = m.avgRespKB + ' KB';

  // Flag if inbound bandwidth looks high (>20 MB/s = ~160 Mbps — notable)
  const high = m.bwInMBps > 20;
  inEl.style.color  = m.bwInMBps  > 50 ? 'var(--red)' : m.bwInMBps > 20 ? 'var(--yellow)' : 'var(--green)';
  warn.style.display = high ? '' : 'none';
}

function resetGauges() {
  ['gauge-score','gauge-checks','gauge-http'].forEach(id => {
    const el = document.getElementById(id);
    if (!el) return;
    const ring = el.querySelector('.gauge-ring');
    ring.style.strokeDasharray  = CIRC;
    ring.style.strokeDashoffset = CIRC;
    ring.style.stroke = 'var(--border)';
    el.querySelector('.gauge-value').textContent = '--';
  });
  ['sc-reqs','sc-rps','sc-avg','sc-p90','sc-p95','sc-p99'].forEach(id => setStat(id, '--'));
  const tb = document.getElementById('threshold-banner');
  if (tb) { tb.style.display = 'none'; tb.innerHTML = ''; }
  const bwIn = document.getElementById('bw-in');
  if (bwIn) { bwIn.textContent = '-- MB/s'; bwIn.style.color = ''; }
  const bwOut = document.getElementById('bw-out');
  if (bwOut) bwOut.textContent = '-- MB/s';
  const bwSize = document.getElementById('bw-size');
  if (bwSize) bwSize.textContent = '-- KB';
  const bwWarn = document.getElementById('bw-warning');
  if (bwWarn) bwWarn.style.display = 'none';
}

function renderThresholds(summary) {
  const tb = document.getElementById('threshold-banner');
  if (!tb) return;
  const thresholds = summary.thresholds;
  if (!thresholds || !thresholds.length) return;

  const allPass = thresholds.every(t => t.pass);
  tb.className = `threshold-banner ${allPass ? 'pass' : 'fail'}`;
  tb.innerHTML = `<strong>${allPass ? '✓ All thresholds passed' : '✗ Some thresholds failed'}</strong>
    <ul>${thresholds.map(t =>
      `<li class="${t.pass ? 'pass' : 'fail'}">${t.pass ? '✓' : '✗'} ${escHtml(t.label)}</li>`
    ).join('')}</ul>`;
  tb.style.display = '';
}

// ─── Form submit ──────────────────────────────────────────────────────────────
const form        = document.getElementById('test-form');
const startBtn    = document.getElementById('start-btn');
const resultPanel = document.getElementById('result-panel');
const outputLog   = document.getElementById('output-log');
const resultStatus= document.getElementById('result-status');

form.addEventListener('submit', async (e) => {
  e.preventDefault();

  const url         = document.getElementById('url').value.trim();
  const vus         = parseInt(document.getElementById('vus-num').value, 10);
  const duration    = parseInt(document.getElementById('duration-num').value, 10);
  const rpsLimit    = parseInt(document.getElementById('rpsLimit').value, 10) || 0;
  const httpMethod  = document.getElementById('httpMethod').value;
  const requestBody = document.getElementById('requestBody').value.trim();
  const headers     = document.getElementById('headers').value.trim() || '{}';
  const cacheMode   = document.getElementById('cacheMode').value;
  const gzip        = document.getElementById('gzip').checked;
  const device      = document.querySelector('input[name="device"]:checked').value;

  try { JSON.parse(headers); } catch {
    alert('Custom Headers must be valid JSON (or leave empty).');
    return;
  }

  startBtn.disabled = true;
  startBtn.textContent = '⏳ Running…';

  outputLog.textContent = '';
  document.getElementById('log-details').open = false;
  resultPanel.style.display = '';
  resultStatus.textContent = 'running';
  resultStatus.className = 'badge running';
  resetGauges();

  // Add pulsing class while running
  document.getElementById('gauges-panel').classList.add('live');

  let res;
  try {
    res = await fetch('/api/tests', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ url, vus, duration, rpsLimit, httpMethod, requestBody, headers, cacheMode, gzip, device }),
    });
  } catch (err) {
    alert('Failed to start test: ' + err.message);
    resetBtn();
    return;
  }

  if (!res.ok) {
    const err = await res.json().catch(() => ({ error: res.statusText }));
    alert('Error: ' + err.error);
    resetBtn();
    return;
  }

  const { id } = await res.json();
  streamTest(id);
});

function streamTest(id) {
  const es = new EventSource(`/api/tests/${id}/stream`);

  es.onmessage = (e) => {
    const data = JSON.parse(e.data);

    if (data.chunk) {
      outputLog.textContent += data.chunk;
      if (document.getElementById('log-details').open)
        outputLog.scrollTop = outputLog.scrollHeight;
    }

    if (data.metrics) {
      updateGauges(data.metrics);
    }

    if (data.done) {
      es.close();
      document.getElementById('gauges-panel').classList.remove('live');
      resultStatus.textContent = data.status;
      resultStatus.className = `badge ${data.status}`;
      // Final update from parsed summary + live data
      if (data.summary) {
        if (data.summary.live) updateGauges(data.summary.live);
        renderThresholds(data.summary);
      }
      resetBtn();
    }

    if (data.error) {
      es.close();
      document.getElementById('gauges-panel').classList.remove('live');
      outputLog.textContent += '\n[error] ' + data.error;
      resetBtn();
    }
  };

  es.onerror = () => {
    es.close();
    document.getElementById('gauges-panel').classList.remove('live');
    resetBtn();
  };
}

function resetBtn() {
  startBtn.disabled = false;
  startBtn.textContent = '▶ Run Test';
}

// ─── History ──────────────────────────────────────────────────────────────────
async function loadHistory() {
  const container = document.getElementById('history-list');
  let tests;
  try {
    const res = await fetch('/api/tests');
    tests = await res.json();
  } catch {
    container.innerHTML = '<p class="empty">Failed to load history.</p>';
    return;
  }

  if (!tests.length) {
    container.innerHTML = '<p class="empty">No tests yet.</p>';
    return;
  }

  container.innerHTML = '';

  for (const t of tests) {
    const item = document.createElement('div');
    item.className = 'history-item';
    item.dataset.id = t.id;

    const date = new Date(t.created_at).toLocaleString();
    const dur  = t.finished_at ? `${Math.round((t.finished_at - t.created_at) / 1000)}s` : `${t.duration}s`;

    // Score mini-gauge from saved live data
    const live = t.summary && t.summary.live;
    const scorePct = live ? live.score : null;
    const scoreColor = scorePct === null ? 'var(--border)'
      : scorePct >= 90 ? 'var(--green)' : scorePct >= 50 ? 'var(--yellow)' : 'var(--red)';

    const miniGauge = `
      <svg viewBox="0 0 40 40" class="mini-gauge" aria-label="Score ${scorePct ?? '--'}">
        <circle cx="20" cy="20" r="16" fill="none" stroke="var(--border)" stroke-width="4"/>
        <circle cx="20" cy="20" r="16" fill="none" stroke="${scoreColor}" stroke-width="4"
          stroke-dasharray="${2 * Math.PI * 16}"
          stroke-dashoffset="${2 * Math.PI * 16 * (1 - (scorePct ?? 0) / 100)}"
          stroke-linecap="round" transform="rotate(-90 20 20)"/>
        <text x="20" y="24" text-anchor="middle" font-size="10" fill="${scoreColor}" font-weight="700">${scorePct ?? '--'}</text>
      </svg>`;

    let metaLine = '';
    if (live) {
      metaLine = `${live.totalReqs.toLocaleString()} reqs · ${live.reqPerSec}/s · p95 ${fmtMs(live.p95)}`;
    } else if (t.summary && t.summary.http_reqs) {
      metaLine = `${t.summary.http_reqs[0]} reqs @ ${t.summary.http_reqs[1]}`;
    }

    const deviceBadge = t.device === 'mobile'
      ? '<span class="pill mobile">&#128241; mobile</span>'
      : '<span class="pill desktop">&#x1F5A5; desktop</span>';
    const cacheBadge = t.cache_mode === 'bust'
      ? '<span class="pill bust">cache-bust</span>'
      : t.cache_mode === 'no-cache'
      ? '<span class="pill no-cache">no-cache</span>'
      : '<span class="pill cached">cached</span>';
    const gzipBadge = t.gzip
      ? '<span class="pill gzip">gzip</span>'
      : '<span class="pill no-gzip">no-gzip</span>';

    item.innerHTML = `
      <div class="history-left">
        ${miniGauge}
      </div>
      <div class="history-body">
        <div class="row1">
          <span class="badge ${t.status}">${t.status}</span>
          <span class="url">${escHtml(t.url)}</span>
          <span class="meta">${t.http_method} · ${t.vus} VUs · ${dur}</span>
          ${deviceBadge}${cacheBadge}${gzipBadge}
        </div>
        <div class="meta">${date}</div>
        ${metaLine ? `<div class="history-summary">${escHtml(metaLine)}</div>` : ''}
      </div>
      <div class="actions">
        <button class="btn-del" title="Delete" data-id="${t.id}">&#x2715;</button>
      </div>
    `;

    item.querySelector('.btn-del').addEventListener('click', async (e) => {
      e.stopPropagation();
      if (!confirm('Delete this test from history?')) return;
      await fetch(`/api/tests/${t.id}`, { method: 'DELETE' });
      loadHistory();
    });

    item.addEventListener('click', () => showHistoryDetail(t.id, item));
    container.appendChild(item);
  }
}

async function showHistoryDetail(id, itemEl) {
  const existing = document.getElementById('history-detail');
  if (existing) {
    const wasThis = existing.dataset.for === id;
    existing.remove();
    if (wasThis) return;
  }

  const res  = await fetch(`/api/tests/${id}`);
  const test = await res.json();
  const live = test.summary && test.summary.live;

  const detail = document.createElement('div');
  detail.id = 'history-detail';
  detail.dataset.for = id;

  // Mini gauges row
  let gaugesHtml = '';
  if (live) {
    const scoreC  = live.score  >= 90 ? 'var(--green)' : live.score  >= 50 ? 'var(--yellow)' : 'var(--red)';
    const checkC  = live.checksRate >= 98 ? 'var(--green)' : live.checksRate >= 90 ? 'var(--yellow)' : 'var(--red)';
    const httpC   = live.httpOkRate >= 99 ? 'var(--green)' : live.httpOkRate >= 95 ? 'var(--yellow)' : 'var(--red)';
    gaugesHtml = `<div class="detail-gauges">
      ${detailGaugeSvg('Score',    live.score,      '/100', scoreC)}
      ${detailGaugeSvg('Checks OK',live.checksRate, '%',    checkC)}
      ${detailGaugeSvg('HTTP OK',  live.httpOkRate, '%',    httpC)}
    </div>
    <div class="detail-stats">
      ${detailStat('Requests', live.totalReqs.toLocaleString())}
      ${detailStat('Req/s',    live.reqPerSec + '/s')}
      ${detailStat('Avg',      fmtMs(live.avg))}
      ${detailStat('p(90)',    fmtMs(live.p90))}
      ${detailStat('p(95)',    fmtMs(live.p95))}
      ${detailStat('p(99)',    fmtMs(live.p99))}
    </div>`;
  }

  detail.innerHTML = `
    <h3 class="detail-title">${escHtml(test.url)}</h3>
    ${gaugesHtml}
    <details><summary>Raw Output</summary><pre>${escHtml(test.output || '(no output)')}</pre></details>
  `;

  itemEl.insertAdjacentElement('afterend', detail);
}

function detailGaugeSvg(title, pct, unit, color) {
  const r = 28, c = 2 * Math.PI * r;
  const offset = c * (1 - Math.min(100, Math.max(0, pct || 0)) / 100);
  return `<div class="dg-wrap">
    <svg viewBox="0 0 72 72" class="dg-svg">
      <circle cx="36" cy="36" r="${r}" fill="none" stroke="var(--border)" stroke-width="5"/>
      <circle cx="36" cy="36" r="${r}" fill="none" stroke="${color}" stroke-width="5"
        stroke-dasharray="${c.toFixed(2)}" stroke-dashoffset="${offset.toFixed(2)}"
        stroke-linecap="round" transform="rotate(-90 36 36)"/>
    </svg>
    <div class="dg-inner">
      <span class="dg-val" style="color:${color}">${Math.round(pct ?? 0)}</span>
      <span class="dg-unit">${unit}</span>
      <span class="dg-title">${title}</span>
    </div>
  </div>`;
}

function detailStat(label, value) {
  return `<div class="detail-stat"><span class="ds-val">${value}</span><span class="ds-lbl">${label}</span></div>`;
}

document.getElementById('refresh-history').addEventListener('click', loadHistory);

function escHtml(s) {
  return String(s)
    .replace(/&/g, '&amp;').replace(/</g, '&lt;')
    .replace(/>/g, '&gt;').replace(/"/g, '&quot;');
}