// 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 HostedFileContentTests
{
    [Fact]
    public void Constructor_InvalidInput_Throws()
    {
        Assert.Throws<ArgumentNullException>(() => new HostedFileContent(null!));
        Assert.Throws<ArgumentException>(() => new HostedFileContent(string.Empty));
        Assert.Throws<ArgumentException>(() => new HostedFileContent(" "));
    }
 
    [Fact]
    public void Constructor_String_PropsDefault()
    {
        string fileId = "id123";
        HostedFileContent c = new(fileId);
        Assert.Null(c.RawRepresentation);
        Assert.Null(c.AdditionalProperties);
        Assert.Equal(fileId, c.FileId);
    }
 
    [Fact]
    public void Constructor_PropsRoundtrip()
    {
        HostedFileContent c = new("id123");
        Assert.Equal("id123", c.FileId);
 
        c.FileId = "id456";
        Assert.Equal("id456", c.FileId);
 
        Assert.Throws<ArgumentNullException>(() => c.FileId = null!);
        Assert.Throws<ArgumentException>(() => c.FileId = string.Empty);
        Assert.Throws<ArgumentException>(() => c.FileId = " ");
 
        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);
    }
 
    [Fact]
    public void Serialization_Roundtrips()
    {
        var content = new HostedFileContent("file123");
 
        var json = JsonSerializer.Serialize(content, AIJsonUtilities.DefaultOptions);
        var deserializedContent = JsonSerializer.Deserialize<HostedFileContent>(json, AIJsonUtilities.DefaultOptions);
 
        Assert.NotNull(deserializedContent);
        Assert.Equal(content.FileId, deserializedContent.FileId);
    }
 
    [Fact]
    public void MediaType_Roundtrips()
    {
        HostedFileContent c = new("id123");
        Assert.Null(c.MediaType);
 
        c.MediaType = "image/png";
        Assert.Equal("image/png", c.MediaType);
 
        c.MediaType = "application/pdf";
        Assert.Equal("application/pdf", c.MediaType);
 
        c.MediaType = null;
        Assert.Null(c.MediaType);
    }
 
    [Theory]
    [InlineData("type")]
    [InlineData("type//subtype")]
    [InlineData("type/subtype/")]
    [InlineData("type/subtype;key=")]
    [InlineData("type/subtype;=value")]
    [InlineData("type/subtype;key=value;another=")]
    public void MediaType_InvalidValue_Throws(string invalidMediaType)
    {
        HostedFileContent c = new("id123");
        Assert.Throws<ArgumentException>(() => c.MediaType = invalidMediaType);
    }
 
    [Theory]
    [InlineData("image/png")]
    [InlineData("image/jpeg")]
    [InlineData("application/pdf")]
    [InlineData("text/plain;charset=UTF-8")]
    [InlineData("image/*")]
    public void MediaType_ValidValue_Roundtrips(string mediaType)
    {
        HostedFileContent c = new("id123") { MediaType = mediaType };
        Assert.Equal(mediaType, c.MediaType);
    }
 
    [Fact]
    public void Name_Roundtrips()
    {
        HostedFileContent c = new("id123");
        Assert.Null(c.Name);
 
        c.Name = "document.pdf";
        Assert.Equal("document.pdf", c.Name);
 
        c.Name = "image.png";
        Assert.Equal("image.png", c.Name);
 
        c.Name = null;
        Assert.Null(c.Name);
    }
}