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

using System.ComponentModel;
using Azure.AI.OpenAI;
using Azure.Identity;
using Microsoft.Extensions.AI;
using Microsoft.SemanticKernel;
using Microsoft.SemanticKernel.Agents;
using OpenAI.Chat;

var endpoint = Environment.GetEnvironmentVariable("AZURE_OPENAI_ENDPOINT") ?? throw new InvalidOperationException("AZURE_OPENAI_ENDPOINT is not set.");
var deploymentName = System.Environment.GetEnvironmentVariable("AZURE_OPENAI_DEPLOYMENT_NAME") ?? "gpt-4o";
var userInput = "What is the weather like in Amsterdam?";

Console.WriteLine($"User Input: {userInput}");

[KernelFunction]
[Description("Get the weather for a given location.")]
static string GetWeather([Description("The location to get the weather for.")] string location)
    => $"The weather in {location} is cloudy with a high of 15°C.";

await SKAgent();
await SKAgent_As_AFAgentAsync();
await AFAgent();

async Task SKAgent()
{
    var builder = Kernel.CreateBuilder().AddAzureOpenAIChatClient(deploymentName, endpoint, new AzureCliCredential());

    ChatCompletionAgent agent = new()
    {
        Instructions = "You are a helpful assistant",
        Kernel = builder.Build(),
        Arguments = new KernelArguments(new PromptExecutionSettings() { FunctionChoiceBehavior = FunctionChoiceBehavior.Auto() }),
    };

    // Initialize plugin and add to the agent's Kernel (same as direct Kernel usage).
    agent.Kernel.Plugins.Add(KernelPluginFactory.CreateFromFunctions("KernelPluginName", [KernelFunctionFactory.CreateFromMethod(GetWeather)]));

    Console.WriteLine("\n=== SK Agent Response ===\n");

    var result = await agent.InvokeAsync(userInput).FirstAsync();
    Console.WriteLine(result.Message);
}

// Example of Semantic Kernel Agent code converted as an Agent Framework Agent
async Task SKAgent_As_AFAgentAsync()
{
    Console.WriteLine("\n=== SK Agent Converted as an AF Agent ===\n");

    var builder = Kernel.CreateBuilder().AddAzureOpenAIChatClient(deploymentName, endpoint, new AzureCliCredential());

#pragma warning disable SKEXP0110 // Type is for evaluation purposes only and is subject to change or removal in future updates. Suppress this diagnostic to proceed.

    ChatCompletionAgent agent = new()
    {
        Instructions = "You are a helpful assistant",
        Kernel = builder.Build(),
        Arguments = new KernelArguments(new PromptExecutionSettings() { FunctionChoiceBehavior = FunctionChoiceBehavior.Auto() }),
    };

    // Initialize plugin and add to the agent's Kernel (same as direct Kernel usage).
    agent.Kernel.Plugins.Add(KernelPluginFactory.CreateFromFunctions("KernelPluginName", [KernelFunctionFactory.CreateFromMethod(GetWeather)]));

    var afAgent = agent.AsAIAgent();

#pragma warning restore SKEXP0110 // Type is for evaluation purposes only and is subject to change or removal in future updates. Suppress this diagnostic to proceed.

    var result = await afAgent.RunAsync(userInput);
    Console.WriteLine(result);
}

async Task AFAgent()
{
    var agent = new AzureOpenAIClient(new Uri(endpoint), new AzureCliCredential()).GetChatClient(deploymentName)
        .AsAIAgent(instructions: "You are a helpful assistant", tools: [AIFunctionFactory.Create(GetWeather)]);

    Console.WriteLine("\n=== AF Agent Response ===\n");

    var result = await agent.RunAsync(userInput);
    Console.WriteLine(result);
}
