/**
 * GOA shop pay popup — public pay-template + payto (no merchant secrets).
 * QR: white modules, centered official qr-logo (DD 90).
 */
(function () {
  var MERCHANT_HOST = "taler.hacktivism.ch";
  var INSTANCE = "goa-demo-cp4zqk";
  var SHOP_PAYTO =
    "payto://x-taler-bank/bank.hacktivism.ch/goa-demo-cp4zqk?receiver-name=GOA%20Demo%20Shop%20cp4zqk";
  var SHOP_PAYTO_HTTPS =
    "https://bank.hacktivism.ch/webui/";

  function payTemplateUri(productId) {
    return (
      "taler://pay-template/" +
      MERCHANT_HOST +
      "/instances/" +
      INSTANCE +
      "/" +
      encodeURIComponent(productId)
    );
  }

  function payTemplateHttps(productId) {
    return (
      "https://" +
      MERCHANT_HOST +
      "/instances/" +
      INSTANCE +
      "/templates/" +
      encodeURIComponent(productId)
    );
  }

  function introBase() {
    var b = document.querySelector("base");
    return b && b.href ? b.href : "/intro/";
  }

  function ensureModal() {
    var m = document.getElementById("goa-pay-modal");
    if (m) return m;
    m = document.createElement("div");
    m.id = "goa-pay-modal";
    m.className = "goa-pay-modal";
    m.setAttribute("role", "dialog");
    m.setAttribute("aria-modal", "true");
    m.setAttribute("aria-labelledby", "goa-pay-title");
    m.hidden = true;
    m.innerHTML =
      '<div class="goa-pay-card">' +
      '  <button type="button" class="goa-pay-x" id="goa-pay-x" aria-label="Close">×</button>' +
      '  <h3 id="goa-pay-title">Pay with Taler</h3>' +
      '  <p class="goa-pay-amount" id="goa-pay-amount"></p>' +
      '  <div class="goa-pay-frame">' +
      '    <div class="goa-pay-qr" id="goa-pay-qr"></div>' +
      '    <img class="goa-pay-logo" id="goa-pay-logo" alt="" />' +
      "  </div>" +
      '  <p class="goa-pay-hint">Scan with GNU Taler Wallet</p>' +
      '  <a class="goa-pay-cta" id="goa-pay-open" href="#">Open payment link →</a>' +
      '  <p class="goa-pay-label">Payment URI (wallet)</p>' +
      '  <p class="goa-pay-line"><code class="goa-pay-uri" id="goa-pay-uri"></code> ' +
      '  <a class="goa-pay-https" id="goa-pay-uri-https" href="#" target="_blank" rel="noopener">(https)</a></p>' +
      '  <p class="goa-pay-label">Merchant payto (settlement)</p>' +
      '  <p class="goa-pay-line"><code class="goa-pay-uri" id="goa-pay-payto"></code> ' +
      '  <a class="goa-pay-https" id="goa-pay-payto-https" href="#" target="_blank" rel="noopener">(https)</a></p>' +
      '  <a class="goa-pay-payto-link" id="goa-pay-payto-link" href="#">Open payto:// link</a>' +
      '  <button type="button" class="goa-pay-close" id="goa-pay-close">Close</button>' +
      "</div>";
    document.body.appendChild(m);
    function close() {
      m.classList.remove("open");
      m.hidden = true;
    }
    m.addEventListener("click", function (e) {
      if (e.target === m) close();
    });
    document.getElementById("goa-pay-x").onclick = close;
    document.getElementById("goa-pay-close").onclick = close;
    document.addEventListener("keydown", function (e) {
      if (e.key === "Escape" && m.classList.contains("open")) close();
    });
    return m;
  }

  function showPay(productId, name, amount) {
    var m = ensureModal();
    if (document.body && document.body.getAttribute("data-shop-theme") === "bank") {
      m.classList.add("bank-theme");
    } else {
      m.classList.remove("bank-theme");
    }
    var uri = payTemplateUri(productId);
    var httpsUri = payTemplateHttps(productId);
    document.getElementById("goa-pay-title").textContent = name || productId;
    document.getElementById("goa-pay-amount").textContent = amount || "";
    var open = document.getElementById("goa-pay-open");
    open.href = uri;

    document.getElementById("goa-pay-uri").textContent = uri;
    var uriHttps = document.getElementById("goa-pay-uri-https");
    uriHttps.href = httpsUri;
    uriHttps.textContent = "(https)";

    document.getElementById("goa-pay-payto").textContent = SHOP_PAYTO;
    var paytoHttps = document.getElementById("goa-pay-payto-https");
    paytoHttps.href = SHOP_PAYTO_HTTPS;
    paytoHttps.textContent = "(https)";
    document.getElementById("goa-pay-payto-link").href = SHOP_PAYTO;

    var qrHost = document.getElementById("goa-pay-qr");
    qrHost.innerHTML = "";
    var logo = document.getElementById("goa-pay-logo");
    logo.src = introBase() + "qr-logo.svg";
    logo.onerror = function () {
      logo.style.display = "none";
    };
    logo.style.display = "";

    if (typeof QRCode === "undefined") {
      qrHost.innerHTML = '<p class="goa-pay-hint">QR library missing</p>';
    } else {
      new QRCode(qrHost, {
        text: uri,
        width: 220,
        height: 220,
        colorDark: "#000000",
        colorLight: "#ffffff",
        correctLevel: QRCode.CorrectLevel.M,
      });
    }

    m.hidden = false;
    m.classList.add("open");
  }

  function bind() {
    document.querySelectorAll("[data-product]").forEach(function (el) {
      el.addEventListener("click", function (e) {
        e.preventDefault();
        var id = el.getAttribute("data-product");
        var nameEl = el.querySelector(".name");
        var priceEl = el.querySelector(".price");
        showPay(
          id,
          nameEl ? nameEl.textContent.trim() : id,
          priceEl ? priceEl.textContent.trim() : ""
        );
      });
    });
  }

  if (document.readyState === "loading") {
    document.addEventListener("DOMContentLoaded", bind);
  } else {
    bind();
  }
})();