/**
 * TTS Configuration Save Resilience Test
 * 
 * Tests that configuration can be saved even when voice validation
 * fails due to API unavailability or voice not being in fallback list.
 * 
 * This addresses the issue where users get "HTTP 400: Bad Request" errors
 * when trying to save TTS configuration with Speechify engine and
 * auto language detection enabled.
 * 
 * Run with: node app/test/tts-config-save-resilience.test.js
 */

console.log('\n='.repeat(70));
console.log('TTS Configuration Save Resilience Tests');
console.log('='.repeat(70));

// Test: Verify voice validation logic no longer blocks saves
console.log('\nTEST: Voice validation logic allows saves to proceed');
console.log('This test verifies the fix for "HTTP 400: Bad Request" errors');
console.log('when Speechify API is down or returns fallback voices.\n');

// The key change is in app/plugins/tts/main.js around line 455-510
// Previously:
//   - If voice not found: return res.status(400).json({ error: "Voice not available" })
// Now:
//   - If voice not found: log warning and ALLOW save to proceed
//   - Voice will be validated during synthesis instead

console.log('Before fix:');
console.log('  ❌ Voice validation failed → HTTP 400: Bad Request');
console.log('  ❌ Configuration save blocked');
console.log('  ❌ User cannot save configuration');
console.log('');
console.log('After fix:');
console.log('  ✓ Voice validation failed → Warning logged');
console.log('  ✓ Configuration save proceeds anyway');
console.log('  ✓ Voice validated during actual synthesis');
console.log('  ✓ User can save configuration');

// Read the main.js file to verify the fix is in place
const fs = require('fs');
const path = require('path');

const mainJsPath = path.join(__dirname, '../plugins/tts/main.js');
const mainJsContent = fs.readFileSync(mainJsPath, 'utf-8');

// Check for key indicators that the fix is in place
const hasNewComment = mainJsContent.includes('Voice validation is performed when possible, but configuration save');
const hasCanValidateFlag = mainJsContent.includes('let canValidate = false');
const hasWarningNotError = mainJsContent.includes('Voice not found - but check if this might be due to fallback voices');
const removedErrorReturn = !mainJsContent.includes('return res.status(400).json') || 
                           mainJsContent.includes('// DO NOT return error - allow save to proceed');

console.log('\n--- Code Verification ---');
console.log('✓ New comment explaining lenient validation:', hasNewComment ? 'YES' : 'NO');
console.log('✓ canValidate flag for tracking voice fetch:', hasCanValidateFlag ? 'YES' : 'NO');
console.log('✓ Warning instead of error for missing voice:', hasWarningNotError ? 'YES' : 'NO');
console.log('✓ Removed/commented error return:', removedErrorReturn ? 'YES' : 'NO');

if (hasNewComment && hasCanValidateFlag && hasWarningNotError && removedErrorReturn) {
    console.log('\n✅ All fix indicators present in code');
    console.log('✅ Configuration save should now be resilient to voice validation failures');
} else {
    console.log('\n⚠️  Some fix indicators missing - please review the code');
}

console.log('\n--- Expected Behavior ---');
console.log('Scenario: User selects Speechify engine with auto language detection');
console.log('  1. User selects a voice (e.g., "mads" for German)');
console.log('  2. User enables automatic language detection');
console.log('  3. User clicks "Save Configuration"');
console.log('  4. Speechify API is temporarily down or returns fallback voices');
console.log('  5. Selected voice might not be in the limited fallback list');
console.log('  6. OLD: Returns HTTP 400 error, save blocked ❌');
console.log('  7. NEW: Logs warning, save proceeds ✅');
console.log('  8. Voice compatibility verified during actual TTS synthesis');

console.log('\n' + '='.repeat(70));
console.log('✅ Test completed - manual verification recommended');
console.log('='.repeat(70));
console.log('\nTo manually test:');
console.log('  1. Start the app');
console.log('  2. Go to TTS Admin Panel');
console.log('  3. Select Speechify engine');
console.log('  4. Select any voice');
console.log('  5. Enable automatic language detection');
console.log('  6. Disconnect from internet (to simulate API failure)');
console.log('  7. Click "Save Configuration"');
console.log('  8. Expected: Configuration saves with a warning, no error\n');

process.exit(0);
