const fs = require('fs');
const path = require('path');

function summarizeResults(results) {
  const lines = [];
  if (results.assertions && Array.isArray(results.assertions)) {
    lines.push(`- Assertions:`);
    for (const a of results.assertions) {
      lines.push(`  - ${a.name}: ${a.ok ? 'PASS' : 'FAIL'} - ${a.detail || ''}`);
    }
  }
  if (results.console && Array.isArray(results.console) && results.console.length) {
    const errors = results.console.filter(c => c.type === 'error' || c.type === 'warning');
    if (errors.length) {
      lines.push(`- Console issues:`);
      for (const e of errors) {
        lines.push(`  - [${e.type}] ${e.text}`);
      }
    }
  }
  if (results.error) lines.push(`- Error: ${results.error}`);
  return lines.join('\n');
}

function appendLog(runName, resultJsonPath, results, artifactUrl) {
  try {
    const logPath = path.resolve(__dirname, 'LOG.md');
    const now = new Date().toISOString();
    const summary = summarizeResults(results);
    const screenshot = results.screenshot ? path.relative(path.dirname(logPath), results.screenshot) : '';
    const status = (results.assertions && Array.isArray(results.assertions) && results.assertions.every(a => a.ok)) ? 'PASS' : (results.error ? 'ERROR' : 'UNKNOWN');
    const entry = [
      `## ${now} — ${runName}`,
      `- Status: ${status}`,
      `- Result JSON: ${resultJsonPath}`,
      artifactUrl ? `- Artifact: ${artifactUrl}` : '',
      screenshot ? `- Screenshot: ${screenshot}` : '',
      summary ? summary : '- No assertions or console issues recorded',
      '',
    ].filter(Boolean).join('\n');

    fs.appendFileSync(logPath, entry + '\n');
    return true;
  } catch (err) {
    try { console.warn('Failed to append log', err); } catch(e){}
    return false;
  }
}

// publishArtifact: runs publish_artifact.js and returns the printed path/URL or null
function publishArtifact(resultJsonPath, label) {
  try {
    const pub = require('child_process').execFileSync;
    const script = path.resolve(__dirname, 'publish_artifact.js');
    const out = pub(process.execPath, [script, resultJsonPath, label], { encoding: 'utf8' });
    return out.trim();
  } catch (err) {
    console.warn('publishArtifact failed', err && err.message ? err.message : err);
    return null;
  }
}

module.exports = { appendLog, publishArtifact };