import { getCollection } from '../../utils/db.js'

export default defineEventHandler(async (event) => {
  try {
    const transactions = await readBody(event)
    const collection = await getCollection('transactions')
    
    // Clear existing transactions and insert new ones
    await collection.deleteMany({})
    
    if (transactions.length > 0) {
      // Convert transactions for MongoDB
      const mongoTransactions = transactions.map(transaction => ({
        ...transaction,
        _id: transaction.id,
        id: undefined,
        date: new Date(transaction.date),
        endDate: transaction.endDate ? new Date(transaction.endDate) : null,
        createdAt: new Date(),
        updatedAt: new Date()
      }))
      
      const result = await collection.insertMany(mongoTransactions)
      
      return {
        success: true,
        insertedCount: result.insertedCount
      }
    }
    
    return {
      success: true,
      insertedCount: 0
    }
  } catch (error) {
    console.error('Error bulk updating transactions:', error)
    throw createError({
      statusCode: 500,
      statusMessage: 'Failed to bulk update transactions'
    })
  }
})