const axios = require('axios');

class PrintfulSupplier {
  constructor({ apiKey, storeId }) {
    this.apiKey = apiKey;
    this.storeId = storeId;
    this.baseUrl = 'https://api.printful.com/v2';
  }

  buildRecipient(customer, shipping) {
    const address = (shipping && shipping.address) || shipping || {};
    const name =
      customer?.name ||
      [address.first_name, address.last_name].filter(Boolean).join(' ');

    return {
      name: name || '',
      email: customer?.email || '',
      phone: address.phone || customer?.phone || '',
      address1: address.line1 || address.address1 || '',
      address2: address.line2 || address.address2 || '',
      city: address.city || '',
      state_code: address.state || address.state_code || '',
      country_code: address.country || address.country_code || '',
      zip: address.postal_code || address.zip || ''
    };
  }

  buildItems(items) {
    return items.map((item) => {
      const syncVariantId =
        item.sync_variant_id || item.printful_sync_variant_id;
      const variantId = item.variant_id || item.printful_variant_id;
      const quantity = item.quantity || item.qty || 1;

      if (!syncVariantId && !variantId) {
        throw new Error(
          'Printful item missing sync_variant_id or variant_id.'
        );
      }

      const payload = {
        quantity,
        ...(syncVariantId ? { sync_variant_id: syncVariantId } : {}),
        ...(variantId ? { variant_id: variantId } : {})
      };

      if (item.retail_price) payload.retail_price = String(item.retail_price);
      if (item.name) payload.name = item.name;
      if (item.sku) payload.sku = item.sku;
      if (item.files) payload.files = item.files;

      return payload;
    });
  }

  async createOrder({ external_id, items, customer, shipping }) {
    const payload = {
      external_id,
      recipient: this.buildRecipient(customer, shipping),
      items: this.buildItems(items)
    };

    if (!this.apiKey) {
      return { simulated: true, payload };
    }

    const headers = {
      Authorization: `Bearer ${this.apiKey}`,
      'Content-Type': 'application/json'
    };
    if (this.storeId) headers['X-PF-Store-Id'] = this.storeId;

    const resp = await axios.post(`${this.baseUrl}/orders`, payload, { headers });
    return resp.data;
  }
}

module.exports = PrintfulSupplier;