// Initialize HelcimPay.js session
const HELCIM_API_BASE = 'https://api.helcim.com/v2'

export default defineEventHandler(async (event) => {
  try {
    const config = useRuntimeConfig(event)
    const body = await readBody(event)
    
    // Debug log the request body
    console.log('Initialize payment request body:', body)
    
    // Validate required fields
    if (!body.customerId) {
      throw createError({
        statusCode: 400,
        statusMessage: 'Customer ID is required'
      })
    }

    const helcimToken = config.public.helcimToken || process.env.NUXT_PUBLIC_HELCIM_TOKEN
    
    // Initialize HelcimPay.js session
    const response = await fetch(`${HELCIM_API_BASE}/helcim-pay/initialize`, {
      method: 'POST',
      headers: {
        'accept': 'application/json',
        'content-type': 'application/json',
        'api-token': helcimToken
      },
      body: JSON.stringify({
        paymentType: 'verify', // For card verification
        amount: 0, // Must be exactly 0 for verification
        currency: 'CAD',
        customerCode: body.customerCode,
        paymentMethod: 'cc'
      })
    })
    
    if (!response.ok) {
      const errorText = await response.text()
      console.error('HelcimPay initialization failed:', response.status, errorText)
      throw createError({
        statusCode: response.status,
        statusMessage: `Failed to initialize payment: ${errorText}`
      })
    }
    
    const paymentData = await response.json()

    return {
      success: true,
      checkoutToken: paymentData.checkoutToken,
      secretToken: paymentData.secretToken
    }
  } catch (error) {
    console.error('Error initializing HelcimPay:', error)
    throw createError({
      statusCode: error.statusCode || 500,
      statusMessage: error.message || 'Failed to initialize payment'
    })
  }
})