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

const args = process.argv.slice(2);
let url = 'http://127.0.0.1:8000/docs/prejoin_template.html';
for (let i=0;i<args.length;i++){
  if ((args[i]==='--url' || args[i]==='-u') && args[i+1]) { url = args[i+1]; i++; }
}

console.log('[visual-test] using URL:', url);

// 1) run capture
console.log('[visual-test] capturing regions...');
let r = spawnSync('node', ['scripts/capture_regions_playwright.mjs', url], { stdio: 'inherit' });
if (r.error) { console.error('[visual-test] capture failed', r.error); process.exit(2); }
if (r.status !== 0) { console.error('[visual-test] capture script exited with', r.status); /* continue to comparison if images may exist */ }

// 2) run compare
console.log('[visual-test] comparing regions...');
let c = spawnSync('node', ['scripts/compare_regions.cjs'], { stdio: 'inherit' });
if (c.error) { console.error('[visual-test] compare failed', c.error); process.exit(2); }
if (c.status !== 0) { console.error('[visual-test] compare script exited with', c.status); }

// 3) read report
const reportPath = '/tmp/prejoin_regions_compare_report.json';
if (!fs.existsSync(reportPath)) { console.error('[visual-test] report not found at', reportPath); process.exit(2); }
const report = JSON.parse(fs.readFileSync(reportPath,'utf8'));
console.log('[visual-test] report generated at', report.generatedAt);

// 4) evaluate metrics against threshold
const THRESHOLD = 0.001; // fail if any region has ratio > 0.1%
let failed = false;
for (const item of report.report) {
  if (item.ratio && item.ratio > THRESHOLD) {
    console.error(`[visual-test] REGION ${item.region} exceeded threshold: ratio=${item.ratio} mismatched=${item.mismatched} total=${item.total}`);
    failed = true;
  } else {
    console.log(`[visual-test] REGION ${item.region}: ratio=${item.ratio || 0} mismatched=${item.mismatched || 0}/${item.total || 0}`);
  }
}

const outJson = '/tmp/prejoin_visual_test_summary.json';
fs.writeFileSync(outJson, JSON.stringify({ url, threshold: THRESHOLD, generatedAt: new Date().toISOString(), report }, null, 2));
console.log('[visual-test] summary written to', outJson);
if (failed) {
  console.error('[visual-test] visual test FAILED');
  process.exit(3);
}
console.log('[visual-test] visual test PASSED');
process.exit(0);