export default {
  async fetch(request, env, ctx) {
    // Get the country code from request.cf and convert it to uppercase
    const country = request.cf?.country?.toUpperCase();

    const Tier1Countries = ["US", "CA"];
    const Tier2Countries = ["ES", "BE"];
    const Tier3Countries = ["ID", "PH"];
    const BlockedCountries = ["PK", "SA", "IR"];

    // List of US states requiring age verification as of 2025
    const ageVerificationStates = [
      "LA", "UT", "MS", "VA", "AR", "TX", "MT", "NC", "ID", "KS",
      "KY", "NE", "IN", "AL", "OK", "FL", "SC", "TN", "GA", "WY", "SD"
    ];

    // If country cannot be determined, return a default response
    if (!country) {
      return new Response("Hello World!", { status: 200 });
    }

    // Block access for countries in the BlockedCountries list
    if (BlockedCountries.includes(country)) {
      return new Response("Access Denied", { status: 403 });
    }

    // Handle Tier 1 countries (US and CA)
    if (Tier1Countries.includes(country)) {
      if (country === "US") {
        // Get the state code from request.cf and convert it to uppercase
        const state = request.cf?.regionCode?.toUpperCase();

        // If state cannot be determined, return a default response
        if (!state) {
          return new Response("Hello World!", { status: 200 });
        }

        // Check if the state requires age verification
        if (ageVerificationStates.includes(state)) {
          // Redirect to age verification page for states that require it
          return Response.redirect("https://example.com/age-verify", 302);
        } else {
          // Redirect to standard US page for states that don’t require age verification
          return Response.redirect("https://example.com/us", 302);
        }
      }
      // Redirect non-US Tier 1 countries (e.g., CA) to a Tier 1-specific page
      return Response.redirect("https://example.com/tier1", 302);
    }

    // Handle Tier 2 countries
    if (Tier2Countries.includes(country)) {
      return Response.redirect("https://example.com/tier2", 302);
    }

    // Handle Tier 3 countries
    if (Tier3Countries.includes(country)) {
      return Response.redirect("https://example.com/tier3", 302);
    }

    // Default response for any unhandled countries
    return new Response("Hello World!", { status: 200 });
  },
};