#!/usr/bin/env node
const fs = require('fs');
const path = require('path');
const { spawnSync } = require('child_process');

const ROOT = path.resolve(__dirname, '..');

function main() {
  const outputsRoot = path.resolve(arg('--outputs') || arg('--output-root') || path.join(ROOT, 'outputs'));
  const outputDir = path.resolve(arg('--output') || path.join(outputsRoot, 'software-client-latest'));
  const input = arg('--input') || latestManualReviewSample(outputsRoot);
  const csv = path.join(outputDir, 'software-client-list.final.csv');
  const markdown = path.join(outputDir, 'software-client-list.final.md');
  const refreshSummary = path.join(outputDir, 'software-client-refresh-summary.json');

  fs.mkdirSync(outputDir, { recursive: true });

  if (!input) {
    const existingSummary = csv.replace(/\.csv$/i, '.summary.json');
    const reusable = fs.existsSync(csv) && fs.existsSync(markdown) && fs.existsSync(existingSummary);
    const summary = {
      generatedAt: new Date().toISOString(),
      passed: reusable,
      skipped: true,
      reason: 'no_manual_review_sample_found',
      outputsRoot,
      outputDir,
      csv,
      markdown,
      summary: existingSummary
    };
    fs.writeFileSync(refreshSummary, JSON.stringify(summary, null, 2), 'utf8');
    console.log(JSON.stringify({ ...summary, refreshSummary }, null, 2));
    if (!reusable) process.exitCode = 1;
    return;
  }

  runNode(['scripts/export-software-table.js', '--input', input, '--output', csv]);
  runNode(['scripts/export-software-markdown.js', '--input', csv, '--output', markdown]);

  const clientSummaryPath = csv.replace(/\.csv$/i, '.summary.json');
  const clientSummary = readJson(clientSummaryPath);
  const summary = {
    generatedAt: new Date().toISOString(),
    passed: true,
    skipped: false,
    input,
    outputsRoot,
    outputDir,
    csv,
    markdown,
    summary: clientSummaryPath,
    sourceRows: Number(clientSummary.sourceRows || 0),
    outputRows: Number(clientSummary.outputRows || 0),
    sourceDuplicateRemovedCount: Number(clientSummary.sourceDuplicateRemovedCount || 0),
    finalDuplicateGroupCount: Number(clientSummary.finalDuplicateGroupCount || 0),
    duplicateCountMeaning: clientSummary.duplicateCountMeaning || '',
    rankContinuous: Boolean(clientSummary.rankContinuous)
  };
  fs.writeFileSync(refreshSummary, JSON.stringify(summary, null, 2), 'utf8');
  console.log(JSON.stringify({ ...summary, refreshSummary }, null, 2));
}

function runNode(args) {
  const result = spawnSync(process.execPath, args, {
    cwd: ROOT,
    encoding: 'utf8',
    shell: false
  });
  if (result.stdout) process.stdout.write(result.stdout);
  if (result.stderr) process.stderr.write(result.stderr);
  if (result.status !== 0) throw new Error(`${args[0]} failed with exit code ${result.status}`);
}

function latestManualReviewSample(root) {
  const files = listFiles(root).filter(file => path.basename(file) === 'manual-review-sample.csv');
  const candidates = files
    .filter(isRefreshCandidateSample)
    .map(file => ({
      file,
      sourceRows: manualReviewSampleRowCount(file),
      mtimeMs: fs.statSync(file).mtimeMs
    }))
    .filter(item => item.sourceRows > 0)
    .sort((a, b) => b.sourceRows - a.sourceRows || b.mtimeMs - a.mtimeMs);
  return candidates[0]?.file || '';
}

function isRefreshCandidateSample(file) {
  const normalized = file.replace(/\\/g, '/').toLowerCase();
  const parent = path.basename(path.dirname(file));
  return /^overnight-quality-\d+$/.test(parent) && !normalized.includes('smoke');
}

function manualReviewSampleRowCount(file) {
  const rows = parseCsv(fs.readFileSync(file, 'utf8').replace(/^\uFEFF/, ''));
  return rows.slice(1).filter(row => row.some(cell => String(cell || '').trim())).length;
}

function listFiles(dir) {
  if (!fs.existsSync(dir)) return [];
  return fs.readdirSync(dir, { withFileTypes: true }).flatMap(entry => {
    const full = path.join(dir, entry.name);
    return entry.isDirectory() ? listFiles(full) : [full];
  });
}

function readJson(file) {
  return JSON.parse(fs.readFileSync(file, 'utf8').replace(/^\uFEFF/, ''));
}

function parseCsv(text) {
  const rows = [];
  let row = [];
  let cell = '';
  let quoted = false;
  for (let index = 0; index < text.length; index += 1) {
    const char = text[index];
    if (char === '\r') continue;
    if (char === '"' && quoted && text[index + 1] === '"') {
      cell += '"';
      index += 1;
    } else if (char === '"') {
      quoted = !quoted;
    } else if (char === ',' && !quoted) {
      row.push(cell);
      cell = '';
    } else if (char === '\n' && !quoted) {
      row.push(cell);
      rows.push(row);
      row = [];
      cell = '';
    } else {
      cell += char;
    }
  }
  if (cell || row.length) {
    row.push(cell);
    rows.push(row);
  }
  return rows;
}

function arg(name) {
  const index = process.argv.indexOf(name);
  return index >= 0 ? process.argv[index + 1] : '';
}

if (require.main === module) main();