'use strict';

var utils = require('./utils');

var PROTECTION_PREFIX = /^\)\]\}',?\n/;
var DEFAULT_CONTENT_TYPE = {
  'Content-Type': 'application/x-www-form-urlencoded'
};

module.exports = {
  transformRequest: [function (data, headers) {
    if(utils.isFormData(data)) {
      return data;
    }
    if (utils.isArrayBuffer(data)) {
      return data;
    }
    if (utils.isArrayBufferView(data)) {
      return data.buffer;
    }
    if (utils.isObject(data) && !utils.isFile(data) && !utils.isBlob(data)) {
      // Set application/json if no Content-Type has been specified
      if (!utils.isUndefined(headers) && utils.isUndefined(headers['Content-Type'])) {
        headers['Content-Type'] = 'application/json;charset=utf-8';
      }
      return JSON.stringify(data);
    }
    return data;
  }],

  transformResponse: [function (data) {
    if (typeof data === 'string') {
      data = data.replace(PROTECTION_PREFIX, '');
      try {
        data = JSON.parse(data);
      } catch (e) {}
    }
    return data;
  }],

  headers: {
    common: {
      'Accept': 'application/json, text/plain, */*'
    },
    patch: utils.merge(DEFAULT_CONTENT_TYPE),
    post: utils.merge(DEFAULT_CONTENT_TYPE),
    put: utils.merge(DEFAULT_CONTENT_TYPE)
  },

  xsrfCookieName: 'XSRF-TOKEN',
  xsrfHeaderName: 'X-XSRF-TOKEN'
};