using MongoDB.Bson.Serialization.Attributes;
using MongoDB.Bson.Serialization.Options;
using MongoDB.Driver;
using MongoDB.Driver.Linq;

RunTest(LinqProvider.V2);
RunTest(LinqProvider.V3);

void RunTest(LinqProvider prov)
{
    try
    {
        var settings = MongoClientSettings.FromConnectionString("mongodb://localhost:27017");
        settings.LinqProvider = prov;
        var client = new MongoClient(settings);
        var db = client.GetDatabase("test");
        var coll = db.GetCollection<MyDocument>("my_collection");
        var result = coll
            .AsQueryable()
            .Select(x => new
            {
                Strings = x.DictData.Select(y => y.Value),
            })
            .ToArray();
        Console.WriteLine($"Works for provider version {prov} (returned items: {result.Length})");
        foreach (var item in result)
            Console.WriteLine(string.Join("; ", item.Strings));
    }
    catch (Exception ex)
    {
        var color = Console.ForegroundColor;
        Console.ForegroundColor = ConsoleColor.Red;
        Console.WriteLine($"Error for provider version {prov}: {ex.Message}");
        Console.ForegroundColor = color;
    }
    Console.WriteLine("-------------------------------------------");
}

class MyDocument
{

    [BsonRepresentation(MongoDB.Bson.BsonType.ObjectId)]
    public string Id { get; set; }

    public string Group { get; set; }

    [BsonDictionaryOptions(DictionaryRepresentation.ArrayOfDocuments)]
    public Dictionary<int, string> DictData { get; set; } = new Dictionary<int, string>();

}