// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System;
using System.Text.Json;
using Xunit;
 
namespace Microsoft.Extensions.AI;
 
public class FunctionResultContentTests
{
    [Fact]
    public void Constructor_PropsDefault()
    {
        FunctionResultContent c = new("callId1", null);
        Assert.Equal("callId1", c.CallId);
        Assert.Null(c.RawRepresentation);
        Assert.Null(c.AdditionalProperties);
        Assert.Null(c.Result);
        Assert.Null(c.Exception);
    }
 
    [Fact]
    public void Constructor_String_PropsRoundtrip()
    {
        FunctionResultContent c = new("id", "result");
        Assert.Null(c.RawRepresentation);
        Assert.Null(c.AdditionalProperties);
        Assert.Equal("id", c.CallId);
        Assert.Equal("result", c.Result);
        Assert.Null(c.Exception);
    }
 
    [Fact]
    public void Constructor_PropsRoundtrip()
    {
        FunctionResultContent c = new("callId1", null);
 
        Assert.Null(c.RawRepresentation);
        object raw = new();
        c.RawRepresentation = raw;
        Assert.Same(raw, c.RawRepresentation);
 
        Assert.Null(c.AdditionalProperties);
        AdditionalPropertiesDictionary props = new() { { "key", "value" } };
        c.AdditionalProperties = props;
        Assert.Same(props, c.AdditionalProperties);
 
        Assert.Equal("callId1", c.CallId);
 
        Assert.Null(c.Result);
        c.Result = "result";
        Assert.Equal("result", c.Result);
 
        Assert.Null(c.Exception);
        Exception e = new();
        c.Exception = e;
        Assert.Same(e, c.Exception);
    }
 
    [Fact]
    public void ItShouldBeSerializableAndDeserializable()
    {
        // Arrange
        var sut = new FunctionResultContent("id", "result");
 
        // Act
        var json = JsonSerializer.Serialize(sut, TestJsonSerializerContext.Default.Options);
 
        var deserializedSut = JsonSerializer.Deserialize<FunctionResultContent>(json, TestJsonSerializerContext.Default.Options);
 
        // Assert
        Assert.NotNull(deserializedSut);
        Assert.Equal(sut.CallId, deserializedSut.CallId);
        Assert.Equal(sut.Result, deserializedSut.Result?.ToString());
    }
 
    [Fact]
    public void ItShouldBeSerializableAndDeserializableWithException()
    {
        // Arrange
        var sut = new FunctionResultContent("callId1", null) { Exception = new InvalidOperationException("hello") };
 
        // Act
        var json = JsonSerializer.Serialize(sut, TestJsonSerializerContext.Default.Options);
        var deserializedSut = JsonSerializer.Deserialize<FunctionResultContent>(json, TestJsonSerializerContext.Default.Options);
 
        // Assert
        Assert.NotNull(deserializedSut);
        Assert.Equal(sut.CallId, deserializedSut.CallId);
        Assert.Equal(sut.Result, deserializedSut.Result?.ToString());
        Assert.Null(deserializedSut.Exception);
    }
 
    [Fact]
    public void Serialization_Roundtrips()
    {
        var content = new FunctionResultContent("call123", "result");
 
        AssertSerializationRoundtrips<FunctionResultContent>(content);
        AssertSerializationRoundtrips<ToolResultContent>(content);
        AssertSerializationRoundtrips<AIContent>(content);
 
        static void AssertSerializationRoundtrips<T>(FunctionResultContent content)
            where T : AIContent
        {
            T contentAsT = (T)(object)content;
            string json = JsonSerializer.Serialize(contentAsT, AIJsonUtilities.DefaultOptions);
            T? deserialized = JsonSerializer.Deserialize<T>(json, AIJsonUtilities.DefaultOptions);
            Assert.NotNull(deserialized);
            var deserializedContent = Assert.IsType<FunctionResultContent>(deserialized);
            Assert.Equal(content.CallId, deserializedContent.CallId);
            Assert.Equal("result", deserializedContent.Result?.ToString());
        }
    }
 
    [Fact]
    public void JsonDeserialization_KnownPayload()
    {
        const string Json = """
            {
              "$type": "functionResult",
              "callId": "call123",
              "result": "the result",
              "additionalProperties": {
                "key": "val"
              }
            }
            """;
 
        AIContent? result = JsonSerializer.Deserialize<AIContent>(Json, AIJsonUtilities.DefaultOptions);
 
        Assert.NotNull(result);
        var funcResult = Assert.IsType<FunctionResultContent>(result);
        Assert.Equal("call123", funcResult.CallId);
        Assert.Equal("the result", funcResult.Result?.ToString());
        Assert.NotNull(funcResult.AdditionalProperties);
        Assert.Equal("val", funcResult.AdditionalProperties["key"]?.ToString());
    }
}