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

using System.ComponentModel;
using System.Text.Json.Serialization;
using Microsoft.OpenApi.Extensions;
using Microsoft.SemanticKernel;
using Microsoft.SemanticKernel.ChatCompletion;
using Microsoft.SemanticKernel.Connectors.MistralAI;

namespace ChatCompletion;

/// <summary>
/// Demonstrates the use of function calling with MistralAI.
/// </summary>
public sealed class MistralAI_FunctionCalling(ITestOutputHelper output) : BaseTest(output)
{
    [Fact]
    public async Task AutoInvokeKernelFunctionsAsync()
    {
        // Create a kernel with MistralAI chat completion and WeatherPlugin
        Kernel kernel = this.CreateKernelWithWeatherPlugin();

        // Invoke chat prompt with auto invocation of functions enabled
        const string ChatPrompt = """
            <message role="user">What is the weather like in Paris?</message>
        """;
        var executionSettings = new MistralAIPromptExecutionSettings { ToolCallBehavior = MistralAIToolCallBehavior.AutoInvokeKernelFunctions };
        var chatSemanticFunction = kernel.CreateFunctionFromPrompt(
            ChatPrompt, executionSettings);
        var chatPromptResult = await kernel.InvokeAsync(chatSemanticFunction);

        Console.WriteLine(chatPromptResult);
    }

    [Fact]
    public async Task AutoInvokeKernelFunctionsMultipleCallsAsync()
    {
        // Create a kernel with MistralAI chat completion and WeatherPlugin
        Kernel kernel = this.CreateKernelWithWeatherPlugin();
        var service = kernel.GetRequiredService<IChatCompletionService>();

        // Invoke chat prompt with auto invocation of functions enabled
        var chatHistory = new ChatHistory
        {
            new ChatMessageContent(AuthorRole.User, "What is the weather like in Paris?")
        };
        var executionSettings = new MistralAIPromptExecutionSettings { ToolCallBehavior = MistralAIToolCallBehavior.AutoInvokeKernelFunctions };
        var chatPromptResult1 = await service.GetChatMessageContentsAsync(chatHistory, executionSettings, kernel);
        chatHistory.AddRange(chatPromptResult1);

        chatHistory.Add(new ChatMessageContent(AuthorRole.User, "What is the weather like in Marseille?"));
        var chatPromptResult2 = await service.GetChatMessageContentsAsync(chatHistory, executionSettings, kernel);

        Console.WriteLine(chatPromptResult1[0].Content);
        Console.WriteLine(chatPromptResult2[0].Content);
    }

    [Fact]
    public async Task RequiredKernelFunctionsAsync()
    {
        // Create a kernel with MistralAI chat completion and WeatherPlugin
        Kernel kernel = this.CreateKernelWithWeatherPlugin();
        var plugin = kernel.Plugins.First();

        // Invoke chat prompt with auto invocation of functions enabled
        const string ChatPrompt = """
            <message role="user">What is the weather like in Paris?</message>
        """;
        var executionSettings = new MistralAIPromptExecutionSettings
        {
            ToolCallBehavior = MistralAIToolCallBehavior.RequiredFunctions(plugin, true)
        };
        var chatSemanticFunction = kernel.CreateFunctionFromPrompt(
            ChatPrompt, executionSettings);
        var chatPromptResult = await kernel.InvokeAsync(chatSemanticFunction);

        Console.WriteLine(chatPromptResult);
    }

    [Fact]
    public async Task NoKernelFunctionsAsync()
    {
        // Create a kernel with MistralAI chat completion and WeatherPlugin
        Kernel kernel = this.CreateKernelWithWeatherPlugin();

        // Invoke chat prompt with auto invocation of functions enabled
        const string ChatPrompt = """
            <message role="user">What is the weather like in Paris?</message>
        """;
        var executionSettings = new MistralAIPromptExecutionSettings
        {
            ToolCallBehavior = MistralAIToolCallBehavior.NoKernelFunctions
        };
        var chatSemanticFunction = kernel.CreateFunctionFromPrompt(
            ChatPrompt, executionSettings);
        var chatPromptResult = await kernel.InvokeAsync(chatSemanticFunction);

        Console.WriteLine(chatPromptResult);
    }

    [Fact]
    public async Task AutoInvokeKernelFunctionsMultiplePluginsAsync()
    {
        // Create a kernel with MistralAI chat completion and WeatherPlugin and WidgetPlugin
        Kernel kernel = this.CreateKernelWithWeatherPlugin();
        kernel.Plugins.AddFromType<WidgetPlugin>();

        // Invoke chat prompt with auto invocation of functions enabled
        const string ChatPrompt = """
            <message role="user">Create a lime and scarlet colored widget for me.</message>
        """;
        var executionSettings = new MistralAIPromptExecutionSettings { ToolCallBehavior = MistralAIToolCallBehavior.AutoInvokeKernelFunctions };
        var chatSemanticFunction = kernel.CreateFunctionFromPrompt(
            ChatPrompt, executionSettings);
        var chatPromptResult = await kernel.InvokeAsync(chatSemanticFunction);

        Console.WriteLine(chatPromptResult);
    }

    public sealed class WeatherPlugin
    {
        [KernelFunction]
        [Description("Get the current weather in a given location.")]
        public string GetWeather(
            [Description("The city and department, e.g. Marseille, 13")] string location
        ) => "12°C\nWind: 11 KMPH\nHumidity: 48%\nMostly cloudy";
    }

    public sealed class WidgetPlugin
    {
        [KernelFunction]
        [Description("Creates a new widget of the specified type and colors")]
        public string CreateWidget([Description("The colors of the widget to be created")] WidgetColor[] widgetColors)
        {
            var colors = string.Join('-', widgetColors.Select(c => c.GetDisplayName()).ToArray());
            return $"Widget created with colors: {colors}";
        }
    }

    [JsonConverter(typeof(JsonStringEnumConverter))]
    public enum WidgetColor
    {
        [Description("Use when creating a red item.")]
        Red,

        [Description("Use when creating a green item.")]
        Green,

        [Description("Use when creating a blue item.")]
        Blue
    }

    private Kernel CreateKernelWithWeatherPlugin()
    {
        // Create a logging handler to output HTTP requests and responses
        var handler = new LoggingHandler(new HttpClientHandler(), this.Output);
        HttpClient httpClient = new(handler);

        // Create a kernel with MistralAI chat completion and WeatherPlugin
        IKernelBuilder kernelBuilder = Kernel.CreateBuilder();
        kernelBuilder.AddMistralChatCompletion(
                modelId: TestConfiguration.MistralAI.ChatModelId!,
                apiKey: TestConfiguration.MistralAI.ApiKey!,
                httpClient: httpClient);
        kernelBuilder.Plugins.AddFromType<WeatherPlugin>();
        Kernel kernel = kernelBuilder.Build();
        return kernel;
    }
}