using DigitalData.Core.Legacy.Client;
using System;
using System.Net.Http;
using System.Threading;
using System.Threading.Tasks;

namespace WindreamHub.Legacy.Client.Models
{
    public static class ModelExtensions
    {
        public static async Task<SimplifiedResponse<TData, TError>> Simplify<TData, TError>(this HttpResponseMessage message)
        {
            TData data = message.IsSuccessStatusCode ? await message.Json<TData>() : default;
            TError err = !message.IsSuccessStatusCode ? await message.Json<TError>() : default;

            return new SimplifiedResponse<TData, TError>(ok: message.IsSuccessStatusCode, status: message.StatusCode, data: data, error: err);
        }

        public static async Task FetchAsync<TData, TError>(this Task<SimplifiedResponse<TData, TError>> responseAsync, Action<TData> next, Action<TError> error = null, CancellationToken cancellationToken = default)
        {
            if (cancellationToken.IsCancellationRequested)
                return;

            var res = await responseAsync;
            if (res.Ok)
                next(res.Data);
            else
                error?.Invoke(res.Error);
        }

        public static void Fetch<TData, TError>(this Task<SimplifiedResponse<TData, TError>> responseAsync, Action<TData> next, Action<TError> error = null, CancellationToken cancellationToken = default)
        {
            Task.Run(async () =>
            {
                if (cancellationToken.IsCancellationRequested)
                    return;

                var res = await responseAsync;
                if (res.Ok)
                    next(res.Data);
                else
                    error?.Invoke(res.Error);
            });
        }

        public static void Fetch<TData, TError>(this Task<SimplifiedResponse<TData, TError>> responseAsync, int millisecondsDelay, Action<TData> next, Action<TError> error = null, CancellationToken cancellationToken = default)
        {
            Task.Run(async () =>
            {
                while (!cancellationToken.IsCancellationRequested)
                {
                    var res = await responseAsync;
                    if (res.Ok)
                        next(res.Data);
                    else
                        error?.Invoke(res.Error);

                    await Task.Delay(millisecondsDelay, cancellationToken);
                }
            });
        }

        public static Func<Task> CreateFetchAsync<TData, TError>(this Task<SimplifiedResponse<TData, TError>> responseAsync, Action<TData> next, Action<TError> error = null, CancellationToken cancellationToken = default)
        {
            return async () =>
            {
                if (cancellationToken.IsCancellationRequested)
                    return;

                var res = await responseAsync;
                if (res.Ok)
                    next(res.Data);
                else
                    error?.Invoke(res.Error);
            };
        }

        public static Action CreateFetch<TData, TError>(this Task<SimplifiedResponse<TData, TError>> responseAsync, Action<TData> next, Action<TError> error = null, CancellationToken cancellationToken = default)
        {
            return () => Task.Run(async () =>
            {
                if (cancellationToken.IsCancellationRequested)
                    return;

                var res = await responseAsync;
                if (res.Ok)
                    next(res.Data);
                else
                    error?.Invoke(res.Error);
            });
        }
    }
}