/**
 * Add Numbers — Zapier create that needs no backend.
 *
 * Inputs: number1, number2 (Zapier number fields).
 * Output: { number1, number2, sum, mode }.
 *
 * If both api_base and api_key are set on the connection, POST /v1/add on the
 * zappier commercial edge instead of adding locally.
 *
 * @module creates/add_numbers
 */

/**
 * @param {unknown} value
 * @param {string} name
 * @returns {number}
 */
function toFiniteNumber(value, name) {
  const n = typeof value === 'number' ? value : Number(value);
  if (!Number.isFinite(n)) {
    throw new Error(`${name} must be a finite number`);
  }
  return n;
}

/**
 * @param {object} z Zapier z toolkit
 * @param {object} bundle
 * @param {object} bundle.inputData
 * @param {string|number} bundle.inputData.number1
 * @param {string|number} bundle.inputData.number2
 * @param {object} bundle.authData
 * @returns {Promise<{number1: number, number2: number, sum: number, mode: string}>}
 */
const perform = async (z, bundle) => {
  const number1 = toFiniteNumber(bundle.inputData.number1, 'number1');
  const number2 = toFiniteNumber(bundle.inputData.number2, 'number2');
  const base = (bundle.authData.api_base || process.env.ZAPPIER_API_BASE || '').replace(/\/$/, '');
  const key = bundle.authData.api_key || '';

  if (base && key) {
    const response = await z.request({
      method: 'POST',
      url: `${base}/v1/add`,
      headers: { 'x-api-key': key, 'content-type': 'application/json' },
      body: { number1, number2 },
    });
    const data = response.data || {};
    return {
      number1: data.number1 ?? number1,
      number2: data.number2 ?? number2,
      sum: data.sum,
      mode: 'hosted',
    };
  }

  return { number1, number2, sum: number1 + number2, mode: 'local' };
};

module.exports = {
  key: 'add_numbers',
  noun: 'Sum',
  display: {
    label: 'Add Numbers',
    description: 'Adds number1 and number2. Works with no API — use this to prove the Zapier connection.',
  },
  operation: {
    cleanInputData: false,
    inputFields: [
      {
        key: 'number1',
        label: 'Number 1',
        type: 'number',
        required: true,
        helpText: 'First addend.',
      },
      {
        key: 'number2',
        label: 'Number 2',
        type: 'number',
        required: true,
        helpText: 'Second addend.',
      },
    ],
    perform,
    sample: { number1: 2, number2: 3, sum: 5, mode: 'local' },
    outputFields: [
      { key: 'number1', label: 'Number 1', type: 'number' },
      { key: 'number2', label: 'Number 2', type: 'number' },
      { key: 'sum', label: 'Sum', type: 'number' },
      { key: 'mode', label: 'Mode', type: 'string' },
    ],
  },
};