using System.IO;
using System.Threading.Tasks;
using ErsatzTV.Core;
using ErsatzTV.Core.Emby;
using ErsatzTV.Core.Interfaces.Emby;
using LanguageExt;
using Newtonsoft.Json;
using static LanguageExt.Prelude;

namespace ErsatzTV.Infrastructure.Emby
{
    public class EmbySecretStore : IEmbySecretStore
    {
        public Task<Unit> DeleteAll() => SaveSecrets(new EmbySecrets());

        public Task<EmbySecrets> ReadSecrets() =>
            File.ReadAllTextAsync(FileSystemLayout.EmbySecretsPath)
                .Map(JsonConvert.DeserializeObject<EmbySecrets>)
                .Map(s => Optional(s).IfNone(new EmbySecrets()));

        public Task<Unit> SaveSecrets(EmbySecrets embySecrets) =>
            Some(JsonConvert.SerializeObject(embySecrets)).Match(
                s => File.WriteAllTextAsync(FileSystemLayout.EmbySecretsPath, s).ToUnit(),
                Task.FromResult(Unit.Default));
    }
}