import axios from 'axios';

const WREN_API_BASE_URL = 'https://api.wren.co/v1';

/**
 * Create a carbon offset order via Wren Climate API
 * @param {Object} orderData - Order data
 * @param {number} orderData.tons - Number of tons to offset
 * @param {number} orderData.portfolioId - Portfolio ID
 * @param {string} orderData.customerEmail - Customer email
 * @param {string} orderData.currency - Currency code
 * @param {number} orderData.amountCents - Amount in cents
 * @param {boolean} orderData.dryRun - Dry run mode (default: false)
 * @returns {Promise<Object>} Wren order response
 */
export async function createWrenOffsetOrder({
  tons,
  portfolioId,
  customerEmail,
  currency,
  amountCents,
  dryRun = false
}) {
  const apiToken = process.env.WREN_API_TOKEN;

  if (!apiToken) {
    throw new Error('WREN_API_TOKEN environment variable is required');
  }

  try {
    const response = await axios.post(
      `${WREN_API_BASE_URL}/offset_orders`,
      {
        tons: parseFloat(tons),
        portfolio: portfolioId,
        currency: currency.toUpperCase(),
        amount_charged: amountCents,
        dry_run: dryRun,
        source: {
          name: 'Puffin App',
          email: customerEmail
        }
      },
      {
        headers: {
          'Authorization': `Bearer ${apiToken}`,
          'Content-Type': 'application/json'
        }
      }
    );

    console.log('✅ Wren offset order created:', response.data.id);
    return response.data;
  } catch (error) {
    console.error('❌ Wren API error:', error.response?.data || error.message);
    throw new Error(`Wren API failed: ${error.response?.data?.message || error.message}`);
  }
}

/**
 * Get Wren offset order details
 * @param {string} orderId - Wren order ID
 * @returns {Promise<Object>} Wren order details
 */
export async function getWrenOffsetOrder(orderId) {
  const apiToken = process.env.WREN_API_TOKEN;

  if (!apiToken) {
    throw new Error('WREN_API_TOKEN environment variable is required');
  }

  try {
    const response = await axios.get(
      `${WREN_API_BASE_URL}/offset_orders/${orderId}`,
      {
        headers: {
          'Authorization': `Bearer ${apiToken}`,
          'Content-Type': 'application/json'
        }
      }
    );

    return response.data;
  } catch (error) {
    console.error('❌ Wren API error:', error.response?.data || error.message);
    throw new Error(`Wren API failed: ${error.response?.data?.message || error.message}`);
  }
}

export default {
  createWrenOffsetOrder,
  getWrenOffsetOrder
};