#!/usr/bin/env node

/**
 * Миграционный скрипт для добавления arrowHint и accentedOption настроек 
 * к существующим trialChoice экранам.
 * 
 * Этот скрипт:
 * 1. Подключается к MongoDB
 * 2. Находит все воронки с экранами template: "trialChoice"
 * 3. Добавляет дефолтные arrowHint и accentedOption настройки если их нет
 * 
 * Запуск:
 *   node scripts/migrate-trial-choice-arrow-hint.mjs
 * 
 * Опции:
 *   --dry-run    Показать изменения без записи в базу
 */

import mongoose from 'mongoose';
import dotenv from 'dotenv';

// Load environment variables
dotenv.config({ path: '.env.local' });

const MONGODB_URI = process.env.MONGODB_URI || 'mongodb://localhost:27017/witlab-funnel';

const isDryRun = process.argv.includes('--dry-run');

// Дефолтные значения для arrowHint
const DEFAULT_ARROW_HINT = {
  text: "It costs us {{maxTrialPrice}} to compensate our team for the work involved in creating your personalized portrait and guide, but please choose the amount you are comfortable with.",
  position: "bottom-right"
};

// Дефолтное значение для accentedOption
const DEFAULT_ACCENTED_OPTION = "server";

// Mongoose schema (minimal for migration)
const FunnelSchema = new mongoose.Schema({
  funnelData: mongoose.Schema.Types.Mixed,
  name: String,
  status: String,
}, {
  timestamps: true,
  collection: 'funnels'
});

const FunnelModel = mongoose.models.Funnel || mongoose.model('Funnel', FunnelSchema);

async function connectToDatabase() {
  try {
    await mongoose.connect(MONGODB_URI, {
      bufferCommands: false,
      maxPoolSize: 10,
      serverSelectionTimeoutMS: 5000,
      socketTimeoutMS: 45000,
    });
    console.log('✅ Connected to MongoDB');
  } catch (error) {
    console.error('❌ Failed to connect to MongoDB:', error.message);
    process.exit(1);
  }
}

async function migrateFunnels() {
  // Находим все воронки с trialChoice экранами без arrowHint
  const funnels = await FunnelModel.find({
    'funnelData.screens': {
      $elemMatch: {
        template: 'trialChoice'
      }
    }
  });

  console.log(`\n📋 Found ${funnels.length} funnels with trialChoice screens\n`);

  let updatedCount = 0;
  let screensUpdated = 0;

  for (const funnel of funnels) {
    const funnelId = funnel.funnelData?.meta?.id || funnel._id;
    const funnelName = funnel.name || funnelId;
    
    let hasChanges = false;
    const screens = funnel.funnelData?.screens || [];

    for (let i = 0; i < screens.length; i++) {
      const screen = screens[i];
      
      if (screen.template === 'trialChoice') {
        const needsArrowHint = !screen.arrowHint;
        const needsAccentedOption = screen.accentedOption === undefined;
        
        if (needsArrowHint || needsAccentedOption) {
          const updates = [];
          if (needsArrowHint) updates.push('arrowHint');
          if (needsAccentedOption) updates.push('accentedOption');
          
          console.log(`  📍 [${funnelName}] Screen "${screen.id}" needs: ${updates.join(', ')}`);
          
          if (!isDryRun) {
            screens[i] = {
              ...screen,
              ...(needsArrowHint && { arrowHint: DEFAULT_ARROW_HINT }),
              ...(needsAccentedOption && { accentedOption: DEFAULT_ACCENTED_OPTION }),
            };
          }
          
          hasChanges = true;
          screensUpdated++;
        } else {
          console.log(`  ✅ [${funnelName}] Screen "${screen.id}" already has all settings`);
        }
      }
    }

    if (hasChanges) {
      if (!isDryRun) {
        funnel.funnelData.screens = screens;
        funnel.markModified('funnelData');
        await funnel.save();
        console.log(`  💾 [${funnelName}] Saved changes`);
      } else {
        console.log(`  🔍 [${funnelName}] Would update (dry-run)`);
      }
      updatedCount++;
    }
  }

  return { updatedCount, screensUpdated, total: funnels.length };
}

async function main() {
  console.log('🚀 Starting trialChoice arrowHint migration...');
  
  if (isDryRun) {
    console.log('⚠️  DRY RUN MODE - No changes will be saved\n');
  }

  await connectToDatabase();

  const { updatedCount, screensUpdated, total } = await migrateFunnels();

  console.log('\n📊 Migration Summary:');
  console.log('=====================');
  console.log(`📁 Total funnels with trialChoice: ${total}`);
  console.log(`📝 Funnels updated: ${updatedCount}`);
  console.log(`🎯 Screens updated: ${screensUpdated}`);
  
  if (isDryRun) {
    console.log('\n⚠️  This was a dry run. Run without --dry-run to apply changes.');
  } else if (updatedCount > 0) {
    console.log('\n✅ Migration completed successfully!');
  } else {
    console.log('\n✨ All trialChoice screens already have arrowHint configured!');
  }

  await mongoose.connection.close();
  console.log('\n👋 Database connection closed.');
}

main().catch(error => {
  console.error('\n💥 Fatal error:', error);
  process.exit(1);
});