/**
 * GET Parameter Parsing & URL Cleanup
 */
(function () {
  'use strict';

  var App = window.BenchmarkApp = window.BenchmarkApp || {};

  var VALID_INDUSTRIES = ['pet', 'fashion', 'wellness'];
  var VALID_REVENUE = Object.keys(App.REVENUE_MAP);
  var VALID_BUDGET = Object.keys(App.BUDGET_MAP);
  var VALID_GROWTH = Object.keys(App.GROWTH_MAP);

  function escapeHtml(str) {
    var div = document.createElement('div');
    div.appendChild(document.createTextNode(str));
    return div.innerHTML;
  }

  /**
   * Parse GET parameters from URL.
   * Returns parsed object or null if invalid.
   * Also extracts A/B variant override before cleaning URL.
   */
  App.parseParams = function () {
    var search = window.location.search;
    if (!search) return null;

    var params = new URLSearchParams(search);

    // Extract variant override before cleaning
    var variantOverride = params.get('variant');
    if (variantOverride) {
      variantOverride = variantOverride.toLowerCase();
      if (variantOverride === 'a' || variantOverride === 'b') {
        App._variantOverride = variantOverride.toUpperCase();
      }
    }

    // Clean URL immediately
    history.replaceState(null, '', window.location.pathname);

    // Extract required params
    var company = params.get('company');
    var industry = params.get('industry');
    var revenue = params.get('revenue');
    var budget = params.get('budget');
    var asins = params.get('asins');
    var growth = params.get('growth');

    // Validate all required params exist
    if (!company || !industry || !revenue || !budget || !asins || !growth) {
      return null;
    }

    // Normalize
    industry = industry.toLowerCase().trim();
    revenue = revenue.toLowerCase().trim();
    budget = budget.toLowerCase().trim();
    growth = growth.toLowerCase().trim();

    // Validate against allowed values
    if (VALID_INDUSTRIES.indexOf(industry) === -1) return null;
    if (VALID_REVENUE.indexOf(revenue) === -1) return null;
    if (VALID_BUDGET.indexOf(budget) === -1) return null;
    if (VALID_GROWTH.indexOf(growth) === -1) return null;

    // Parse ASINs as integer (min 1)
    var asinsNum = parseInt(asins, 10);
    if (isNaN(asinsNum) || asinsNum < 1) asinsNum = 1;

    return {
      company: escapeHtml(company.trim()),
      companyRaw: company.trim(),
      industry: industry,
      revenue: revenue,
      budget: budget,
      asins: asinsNum,
      growth: growth
    };
  };
})();