/**
 * Diagnostic Script: Check for Malformed Time Entries
 * Run this to identify time format issues in the database
 * 
 * Usage: node scripts/checkTimeFormat.js
 */

import { rawQuery } from '../src/db.js';
import dotenv from 'dotenv';

dotenv.config();

async function checkTimeFormats() {
  console.log('🔍 Checking for malformed time entries...\n');

  try {
    // Check 1: Find entries with just "XX AM" or "XX PM" (no colon, likely missing hour)
    const malformed1 = await rawQuery(`
      SELECT 
        "CreatedDate",
        "CreatedTime",
        COUNT(*) as count
      FROM "OptionsFlow_monthly"
      WHERE "CreatedTime" IS NOT NULL
        AND "CreatedTime"::text ~ '^\\d{1,2}\\s*(AM|PM)$'
        AND "CreatedTime"::text !~ '^\\d{1,2}:\\d{2}'
      GROUP BY "CreatedDate", "CreatedTime"
      ORDER BY count DESC
      LIMIT 20;
    `);

    console.log('📊 Pattern 1: Times like "34 AM" or "12 PM" (no colon, missing hour):');
    if (malformed1.length > 0) {
      console.log(`   Found ${malformed1.length} unique malformed time patterns`);
      malformed1.forEach(row => {
        console.log(`   - "${row.CreatedTime}" on ${row.CreatedDate}: ${row.count} occurrences`);
      });
    } else {
      console.log('   ✅ No issues found');
    }
    console.log('');

    // Check 2: Find entries with ":XX AM" or ":XX PM" (colon but no hour)
    const malformed2 = await rawQuery(`
      SELECT 
        "CreatedDate",
        "CreatedTime",
        COUNT(*) as count
      FROM "OptionsFlow_monthly"
      WHERE "CreatedTime" IS NOT NULL
        AND "CreatedTime"::text ~ '^:\\d{1,2}\\s*(AM|PM)$'
      GROUP BY "CreatedDate", "CreatedTime"
      ORDER BY count DESC
      LIMIT 20;
    `);

    console.log('📊 Pattern 2: Times like ":34 AM" (colon but missing hour):');
    if (malformed2.length > 0) {
      console.log(`   Found ${malformed2.length} unique malformed time patterns`);
      malformed2.forEach(row => {
        console.log(`   - "${row.CreatedTime}" on ${row.CreatedDate}: ${row.count} occurrences`);
      });
    } else {
      console.log('   ✅ No issues found');
    }
    console.log('');

    // Check 3: Count total malformed entries
    const totalMalformed = await rawQuery(`
      SELECT COUNT(*) as total
      FROM "OptionsFlow_monthly"
      WHERE "CreatedTime" IS NOT NULL
        AND (
          ("CreatedTime"::text ~ '^\\d{1,2}\\s*(AM|PM)$' AND "CreatedTime"::text !~ '^\\d{1,2}:\\d{2}')
          OR "CreatedTime"::text ~ '^:\\d{1,2}\\s*(AM|PM)$'
        );
    `);

    console.log(`📈 Total malformed entries: ${totalMalformed[0]?.total || 0}`);
    console.log('');

    // Check 4: Show sample of properly formatted times for comparison
    const properFormat = await rawQuery(`
      SELECT 
        "CreatedDate",
        "CreatedTime",
        COUNT(*) as count
      FROM "OptionsFlow_monthly"
      WHERE "CreatedTime" IS NOT NULL
        AND "CreatedTime"::text ~ '^\\d{1,2}:\\d{2}:\\d{2}\\s*(AM|PM)$'
      GROUP BY "CreatedDate", "CreatedTime"
      ORDER BY "CreatedDate" DESC, count DESC
      LIMIT 10;
    `);

    console.log('✅ Sample of properly formatted times:');
    properFormat.forEach(row => {
      console.log(`   - "${row.CreatedTime}" on ${row.CreatedDate}: ${row.count} occurrences`);
    });
    console.log('');

    // Summary
    const totalEntries = await rawQuery(`
      SELECT COUNT(*) as total
      FROM "OptionsFlow_monthly"
      WHERE "CreatedTime" IS NOT NULL;
    `);

    const total = totalEntries[0]?.total || 0;
    const malformed = totalMalformed[0]?.total || 0;
    const percentage = total > 0 ? ((malformed / total) * 100).toFixed(2) : 0;

    console.log('📋 Summary:');
    console.log(`   Total entries with time: ${total}`);
    console.log(`   Malformed entries: ${malformed} (${percentage}%)`);
    console.log(`   Properly formatted: ${total - malformed} (${(100 - parseFloat(percentage)).toFixed(2)}%)`);
    console.log('');

    if (malformed > 0) {
      console.log('⚠️  ACTION REQUIRED:');
      console.log('   Run the fix script: backend/database/fix_time_format_simple.sql');
      console.log('   Or use the comprehensive fix: backend/database/fix_malformed_times.sql');
    } else {
      console.log('✅ All time entries appear to be properly formatted!');
    }

  } catch (error) {
    console.error('❌ Error checking time formats:', error.message);
    console.error(error);
  }
}

// Run the check
checkTimeFormats()
  .then(() => {
    console.log('\n✅ Diagnostic complete');
    process.exit(0);
  })
  .catch((error) => {
    console.error('\n❌ Diagnostic failed:', error);
    process.exit(1);
  });