// integrations/webex/reportsCsv.js
// Pure CSV helpers for Webex Reports (no Webex client import).

export function reportDateRangeFromWindow(window) {
  const startDay = String(window.startTime).slice(0, 10);
  const endDay = String(window.endTime).slice(0, 10);
  return { startDate: startDay, endDate: endDay };
}

function splitCsvLine(line) {
  const out = [];
  let cur = '';
  let inQ = false;
  for (let i = 0; i < line.length; i++) {
    const c = line[i];
    if (c === '"') {
      inQ = !inQ;
      continue;
    }
    if (c === ',' && !inQ) {
      out.push(cur.trim());
      cur = '';
      continue;
    }
    cur += c;
  }
  out.push(cur.trim());
  return out;
}

function normKey(k) {
  return String(k || '').toLowerCase().replace(/[^a-z0-9]+/g, '');
}

export function parseMediaQualityCsv(text) {
  if (!text || !String(text).trim()) return { headers: [], rows: [] };
  const lines = String(text).split(/\r?\n/).filter((l) => l.trim());
  if (!lines.length) return { headers: [], rows: [] };
  const headers = splitCsvLine(lines[0]);
  const rows = [];
  for (let i = 1; i < lines.length; i++) {
    const cols = splitCsvLine(lines[i]);
    if (!cols.some(Boolean)) continue;
    const row = {};
    headers.forEach((h, idx) => { row[h] = cols[idx] ?? ''; });
    row._norm = Object.fromEntries(
      headers.map((h, idx) => [normKey(h), cols[idx] ?? '']),
    );
    rows.push(row);
  }
  return { headers, rows };
}

export function filterMediaQualityRows(rows, { locationName, window }) {
  const loc = String(locationName || '').toLowerCase();
  const startMs = new Date(window.startTime).getTime();
  const endMs = new Date(window.endTime).getTime();

  return (rows || []).filter((row) => {
    const n = row._norm || {};
    const rowLoc = String(
      n.location || n.sitelocation || n.sitename || row.Location || '',
    ).toLowerCase();
    if (loc && rowLoc && !rowLoc.includes(loc) && !loc.includes(rowLoc)) {
      return false;
    }
    const startRaw = n.starttime || n.callstarttime || n.start || row['Start Time'] || '';
    if (!startRaw) return true;
    const t = new Date(startRaw).getTime();
    if (!Number.isFinite(t)) return true;
    return t >= startMs && t <= endMs;
  });
}