/**
 * Example project demonstrating how to use Notifkit via its HTTP API — no SDK,
 * just fetch. Any language that can POST JSON works the same way.
 *
 * Before running this, start a Notifkit server. The custom-server example is
 * one:
 *   $ cd ../custom-server && node index.js
 *
 * To run this example:
 *   $ ADMIN_API_KEY=my_super_secret_admin_key npm start
 */

const API_BASE = process.env.NOTIFKIT_API_URL || "http://localhost:3000/v1";
const API_KEY = process.env.ADMIN_API_KEY || "my_super_secret_admin_key";

// Every /v1 route is authenticated. Only /health, /live, /ready and /metrics are not.
const headers = {
  "Content-Type": "application/json",
  Authorization: `Bearer ${API_KEY}`,
};

async function main() {
  console.log("🚀 Starting Notifkit example...\n");

  try {
    // 1. Sync Templates (Configure how notifications should look)
    console.log("1️⃣ Syncing email template...");
    const templateRes = await fetch(`${API_BASE}/templates`, {
      method: "PUT",
      headers,
      body: JSON.stringify({
        templates: [
          {
            id: "welcome_email",
            channel: "email",
            // The per-channel fields live under `content`.
            content: {
              subject: "Welcome to Notifkit, {{name}}!",
              html: "<h1>Hello {{name}}</h1><p>Thanks for signing up!</p>",
              text: "Hello {{name}}! Thanks for signing up!",
            },
          },
        ],
      }),
    });
    console.log("Template Response:", await templateRes.json());
    console.log();

    // 2. Create a User (Register a recipient)
    console.log("2️⃣ Registering a user...");
    const userRes = await fetch(`${API_BASE}/users`, {
      method: "POST",
      headers,
      body: JSON.stringify({
        id: "user_123",
        email: "test@example.com",
        preferences: {
          channels: { email: true },
        },
      }),
    });
    console.log("User Response:", await userRes.json());
    console.log();

    // 3. Send a Notification
    console.log("3️⃣ Sending notification...");
    const notifyRes = await fetch(`${API_BASE}/notify`, {
      method: "POST",
      headers,
      body: JSON.stringify({
        user: "user_123",
        template: "welcome_email",
        channels: ["email"],
        data: {
          name: "Alice",
        },
      }),
    });
    // 202 Accepted — queued, not delivered. Track it with
    // GET /v1/notifications/{taskId}.
    console.log("Notify Response:", await notifyRes.json());
    console.log("\n✅ Example completed successfully!");
  } catch (err) {
    console.error("❌ Error executing example:", err.message);
  }
}

main();