/**
 * Generate a comprehensive accessibility report
 * This script analyzes the axe-core and Pa11y test results and generates a report
 * of all accessibility issues that need to be fixed
 */

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

// Directory containing test reports
const reportsDir = path.join(__dirname, '../reports');

// Output report file
const outputFile = path.join(reportsDir, 'accessibility-issues.md');

// Get all axe-core report files
const axeReports = fs.readdirSync(reportsDir)
  .filter(file => file.startsWith('axe-') && file.endsWith('.json'))
  .map(file => {
    try {
      const content = fs.readFileSync(path.join(reportsDir, file), 'utf8');
      return { file, content: JSON.parse(content) };
    } catch (error) {
      console.error(`Error reading ${file}:`, error.message);
      return { file, content: null };
    }
  })
  .filter(report => report.content !== null);

// Get all Pa11y report files
const pa11yReports = fs.readdirSync(reportsDir)
  .filter(file => file.startsWith('pa11y') && file.endsWith('.json') && !file.includes('summary'))
  .map(file => {
    try {
      const content = fs.readFileSync(path.join(reportsDir, file), 'utf8');
      return { file, content: JSON.parse(content) };
    } catch (error) {
      console.error(`Error reading ${file}:`, error.message);
      return { file, content: null };
    }
  })
  .filter(report => report.content !== null);

// Generate report
let report = `# Accessibility Issues Report
Generated on: ${new Date().toISOString()}

This report lists all accessibility issues found by automated testing tools.
Fixing these issues will help achieve WCAG 2.1 AAA compliance.

## Summary

`;

// Process axe-core reports
const axeIssues = [];
axeReports.forEach(report => {
  if (report.content && report.content.violations) {
    report.content.violations.forEach(violation => {
      violation.nodes.forEach(node => {
        axeIssues.push({
          page: report.file.replace('axe-', '').replace('.json', ''),
          id: violation.id,
          impact: violation.impact,
          description: violation.description,
          help: violation.help,
          helpUrl: violation.helpUrl,
          element: node.html || node.target?.join(', ') || 'Unknown element',
          wcag: violation.tags.filter(t => t.startsWith('wcag')).join(', ')
        });
      });
    });
  }
});

// Process Pa11y reports
const pa11yIssues = [];
pa11yReports.forEach(report => {
  if (report.content && report.content.issues) {
    report.content.issues.forEach(issue => {
      pa11yIssues.push({
        page: report.file.replace('pa11y', '').replace('.json', ''),
        code: issue.code,
        type: issue.type,
        message: issue.message,
        context: issue.context,
        selector: issue.selector
      });
    });
  }
});

// Add summary counts to report
report += `- Total pages tested: ${axeReports.length}
- Pages with axe-core issues: ${axeReports.filter(r => r.content?.violations?.length > 0).length}
- Total axe-core issues: ${axeIssues.length}
- Pages with Pa11y issues: ${pa11yReports.filter(r => r.content?.issues?.length > 0).length}
- Total Pa11y issues: ${pa11yIssues.length}

## Common Issues

`;

// Group issues by type
const issuesByType = {};
axeIssues.forEach(issue => {
  if (!issuesByType[issue.id]) {
    issuesByType[issue.id] = {
      count: 0,
      description: issue.description,
      help: issue.help,
      helpUrl: issue.helpUrl,
      wcag: issue.wcag,
      pages: new Set()
    };
  }
  issuesByType[issue.id].count++;
  issuesByType[issue.id].pages.add(issue.page);
});

// Sort issues by count
const sortedIssues = Object.entries(issuesByType)
  .sort((a, b) => b[1].count - a[1].count);

// Add common issues to report
sortedIssues.forEach(([id, info]) => {
  report += `### ${id} (${info.count} occurrences)

- **Description**: ${info.description}
- **Help**: ${info.help}
- **WCAG**: ${info.wcag}
- **Pages affected**: ${Array.from(info.pages).join(', ')}
- **More info**: ${info.helpUrl}

`;
});

// Add detailed issues by page
report += `## Issues by Page

`;

// Group issues by page
const issuesByPage = {};
axeIssues.forEach(issue => {
  if (!issuesByPage[issue.page]) {
    issuesByPage[issue.page] = [];
  }
  issuesByPage[issue.page].push(issue);
});

// Add page-specific issues to report
Object.entries(issuesByPage).forEach(([page, issues]) => {
  report += `### ${page}

`;
  issues.forEach(issue => {
    report += `- **${issue.id}** (${issue.impact}): ${issue.help}
  - Element: \`${issue.element.substring(0, 100)}${issue.element.length > 100 ? '...' : ''}\`
  - WCAG: ${issue.wcag}

`;
  });
});

// Add recommended fixes
report += `## Recommended Fixes

Based on the issues found, here are the recommended fixes:

`;

// Add specific recommendations for common issues
if (issuesByType['color-contrast-enhanced']) {
  report += `### Color Contrast Issues

1. Update link colors to meet 7:1 contrast ratio:
   - Current blue link color (#0056b3) on light background (#f5f5f5) has 6.45:1 ratio
   - Recommended: Change to darker blue (#004494) for 7:1+ ratio

2. Update CSS in the following files:
   - \`docker/resume/styles.css\`: Update link colors
   - \`docker/resume/stories/stories.css\`: Update story-specific link colors

`;
}

// Add implementation plan
report += `## Implementation Plan

1. Fix color contrast issues first (highest impact)
2. Address any document structure issues
3. Fix remaining issues by priority (serious > moderate > minor)
4. Re-run tests to verify fixes

## Testing Instructions

To test accessibility compliance:

\`\`\`bash
# Run all accessibility tests
npm run test:accessibility

# Generate updated report
node tests/accessibility/generate-report.js
\`\`\`

`;

// Write report to file
fs.writeFileSync(outputFile, report);
console.log(`Accessibility issues report generated at: ${outputFile}`);