// Copyright (c) Microsoft. All rights reserved.

// This sample shows how to create and use a simple AI agent with Purview integration.
// It uses Azure OpenAI as the backend, but any IChatClient can be used.
// Authentication to Purview is done using an InteractiveBrowserCredential.
// Any TokenCredential with Purview API permissions can be used here.

using Azure.AI.OpenAI;
using Azure.Core;
using Azure.Identity;
using Microsoft.Agents.AI;
using Microsoft.Agents.AI.Purview;
using Microsoft.Extensions.AI;

var endpoint = Environment.GetEnvironmentVariable("AZURE_OPENAI_ENDPOINT") ?? throw new InvalidOperationException("AZURE_OPENAI_ENDPOINT is not set.");
var deploymentName = Environment.GetEnvironmentVariable("AZURE_OPENAI_DEPLOYMENT_NAME") ?? "gpt-5.4-mini";
var purviewClientAppId = Environment.GetEnvironmentVariable("PURVIEW_CLIENT_APP_ID") ?? throw new InvalidOperationException("PURVIEW_CLIENT_APP_ID is not set.");

// This will get a user token for an entra app configured to call the Purview API.
// Any TokenCredential with permissions to call the Purview API can be used here.
TokenCredential browserCredential = new InteractiveBrowserCredential(
    new InteractiveBrowserCredentialOptions
    {
        ClientId = purviewClientAppId
    });

// WARNING: DefaultAzureCredential is convenient for development but requires careful consideration in production.
// In production, consider using a specific credential (e.g., ManagedIdentityCredential) to avoid
// latency issues, unintended credential probing, and potential security risks from fallback mechanisms.
using IChatClient client = new AzureOpenAIClient(
    new Uri(endpoint),
    new DefaultAzureCredential())
    .GetResponsesClient()
    .AsIChatClient(deploymentName)
    .AsBuilder()
    .WithPurview(browserCredential, new PurviewSettings("Agent Framework Test App"))
    .Build();

Console.WriteLine("Enter a prompt to send to the client:");
string? promptText = Console.ReadLine();

if (!string.IsNullOrEmpty(promptText))
{
    // Invoke the agent and output the text result.
    Console.WriteLine(await client.GetResponseAsync(promptText));
}