using System.IO;
using System.Threading.Tasks;
using BTCPayServer.Abstractions.Contracts;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.FileProviders;
using Newtonsoft.Json.Linq;

namespace BTCPayServer.Services;

public class DefaultSwaggerProvider : ISwaggerProvider
{
    private readonly IFileProvider _fileProvider;

    public DefaultSwaggerProvider(IWebHostEnvironment webHostEnvironment, ISettingsAccessor<PoliciesSettings> policies)
    {

        _fileProvider = webHostEnvironment.WebRootFileProvider;
        Policies = policies;
    }

    public BTCPayServerEnvironment Env { get; }
    public ISettingsAccessor<PoliciesSettings> Policies { get; }

    public async Task<JObject> Fetch()
    {

        JObject json = new JObject();
        var directoryContents = _fileProvider.GetDirectoryContents("swagger/v1");
        foreach (IFileInfo fi in directoryContents)
        {
            await using var stream = fi.CreateReadStream();
            using var reader = new StreamReader(fi.CreateReadStream());
            var jObject = JObject.Parse(await reader.ReadToEndAsync());
            if (jObject.Remove("x_experimental") && !Policies.Settings.Experimental)
                continue;
            json.Merge(jObject);
        }

        return json;
    }
}