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<!doctype html>
<html lang="es">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Panel de Control SaaS</title>
    <script src="https://cdn.tailwindcss.com"></script>
  </head>
  <body class="bg-slate-100 text-slate-900">
    <div class="max-w-6xl mx-auto p-6 space-y-6">
      <header
        class="flex flex-col gap-3 md:flex-row md:items-center md:justify-between"
      >
        <div>
          <h1 class="text-3xl font-bold">Panel de Control SaaS</h1>
          <p class="text-slate-600">
            Desde aquí puedes ver usuarios activos, generar nuevas API keys y
            obtener el script de integración.
          </p>
        </div>
        <div class="space-x-2">
          <a
            href="/preview"
            class="inline-block px-4 py-2 bg-blue-600 text-white rounded-lg hover:bg-blue-700"
            >Vista previa</a
          >
          <button
            id="open-app-button"
            class="inline-block px-4 py-2 bg-slate-200 text-slate-900 rounded-lg hover:bg-slate-300"
          >
            Abrir app
          </button>
        </div>
      </header>

      <section class="grid gap-6 lg:grid-cols-2">
        <div class="bg-white rounded-3xl p-6 shadow-lg">
          <h2 class="text-xl font-semibold mb-4">Generar nueva API key</h2>
          <div class="space-y-4">
            <label class="block">
              <span class="text-sm font-medium text-slate-700"
                >Nombre del cliente</span
              >
              <input
                id="client-name"
                type="text"
                placeholder="Ej. Tienda Sur"
                class="mt-2 w-full rounded-2xl border border-slate-300 px-4 py-3 focus:border-blue-500 focus:outline-none"
              />
            </label>
            <button
              id="generate-key"
              class="w-full px-5 py-3 bg-green-600 text-white rounded-2xl hover:bg-green-700"
            >
              Generar API key
            </button>
            <div
              id="generate-result"
              class="hidden rounded-2xl border border-slate-200 bg-slate-50 p-4 text-slate-900"
            ></div>
          </div>
        </div>

        <div class="bg-white rounded-3xl p-6 shadow-lg">
          <h2 class="text-xl font-semibold mb-4">
            Instrucciones de integración
          </h2>
          <p class="text-slate-600 mb-4">
            El desarrollador debe insertar un contenedor y el script del widget
            en su HTML:
          </p>
          <pre
            class="rounded-2xl bg-slate-950 p-4 text-slate-100 overflow-x-auto"
          ><code id="static-snippet"></code></pre>
          <script>
            document.getElementById("static-snippet").textContent =
              '<div id="contenedor-saas" data-client-id="ID_UNICO_DEL_CLIENTE_001"></div>\n' +
              '<script src="' + window.location.origin + '/widget.js"><\/script>';
          </script>
          <p class="text-sm text-slate-500 mt-4">
            Reemplaza <strong>ID_UNICO_DEL_CLIENTE_001</strong> por la API key
            generada.
          </p>
        </div>
      </section>

      <section class="grid gap-6 lg:grid-cols-2">
        <div class="bg-white rounded-3xl p-6 shadow-lg">
          <h2 class="text-xl font-semibold mb-4">Clientes registrados</h2>
          <div id="clients-list" class="space-y-3 text-slate-700"></div>
        </div>
        <div class="bg-white rounded-3xl p-6 shadow-lg">
          <h2 class="text-xl font-semibold mb-4">Usuarios activos</h2>
          <div id="active-list" class="space-y-3 text-slate-700"></div>
        </div>
      </section>
    </div>

    <script>
      async function loadData() {
        const [keysRes, activeRes] = await Promise.all([
          fetch("/api/keys"),
          fetch("/api/active-sessions"),
        ]);
        const keysData = await keysRes.json();
        const activeData = await activeRes.json();

        const clientsList = document.getElementById("clients-list");
        clientsList.innerHTML = keysData.keys
          .map(
            (key) => `
          <div class="rounded-2xl border border-slate-200 bg-slate-50 p-4">
            <div class="font-semibold">${key.nombre}</div>
            <div class="text-sm text-slate-500">API key: <code>${key.client_id}</code></div>
            <div class="text-sm text-slate-500">Color primario: ${key.color_primario}</div>
            <div class="text-sm text-slate-500">Creado: ${key.created_at}</div>
          </div>
        `,
          )
          .join("");

        const activeList = document.getElementById("active-list");
        if (activeData.active_sessions.length === 0) {
          activeList.innerHTML =
            '<p class="text-sm text-slate-500">No hay sesiones activas aún.</p>';
        } else {
          activeList.innerHTML = activeData.active_sessions
            .map(
              (item) => `
            <div class="rounded-2xl border border-slate-200 bg-slate-50 p-4">
              <div class="font-semibold">${item.client_id}</div>
              <div class="text-sm text-slate-500">Último acceso: ${item.last_seen}</div>
            </div>
          `,
            )
            .join("");
        }
      }

      document
        .getElementById("generate-key")
        .addEventListener("click", async () => {
          const nameInput = document.getElementById("client-name");
          const name = nameInput.value.trim();
          if (!name) {
            alert("Ingresa el nombre del cliente antes de generar la API key.");
            return;
          }

          const formData = new URLSearchParams();
          formData.append("nombre", name);

          const response = await fetch("/api/generate-key", {
            method: "POST",
            body: formData,
          });
          const result = await response.json();

          const resultBox = document.getElementById("generate-result");
          resultBox.classList.remove("hidden");
          const escapedSnippet = result.snippet
            .replace(/&/g, "&amp;")
            .replace(/</g, "&lt;")
            .replace(/>/g, "&gt;");
          resultBox.innerHTML = `
          <p class="font-semibold text-slate-900">API key generada:</p>
          <p class="mt-2"><code>${result.client_id}</code></p>
          <p class="mt-3 font-semibold text-slate-900">Snippet para el cliente:</p>
          <pre class="mt-2 rounded-2xl bg-slate-950 p-4 text-slate-100 overflow-x-auto"><code>${escapedSnippet}</code></pre>
        `;

          nameInput.value = "";
          await loadData();
        });

      loadData();

      document
        .getElementById("open-app-button")
        .addEventListener("click", async () => {
          const clientId = "ID_UNICO_DEL_CLIENTE_001";
          try {
            const res = await fetch("/api/token", {
              method: "POST",
              headers: { "Content-Type": "application/x-www-form-urlencoded" },
              body: `client_id=${encodeURIComponent(clientId)}`,
            });
            const data = await res.json();
            if (!res.ok) {
              throw new Error(data.error || "No se pudo generar token.");
            }
            window.open(
              `/app?token=${encodeURIComponent(data.token)}`,
              "_blank",
            );
          } catch (error) {
            alert("No se pudo abrir el app: " + error.message);
          }
        });
    </script>
  </body>
</html>