using System;
using System.Net;
using System.Net.Http;
using System.Net.Http.Json;
using System.Threading;
using System.Threading.Tasks;
using Oqtane.Shared;

namespace Oqtane.Services
{
    public class RemoteServiceBase
    {
        private readonly SiteState _siteState;
        private readonly IHttpClientFactory _httpClientFactory;

        protected RemoteServiceBase(IHttpClientFactory httpClientFactory, SiteState siteState)
        {
            _siteState = siteState;
            _httpClientFactory = httpClientFactory;
        }

        private HttpClient GetHttpClient()
        {
            return GetHttpClient(_siteState?.AuthorizationToken);
        }

        private HttpClient GetHttpClient(string AuthorizationToken)
        {
            var httpClient = _httpClientFactory.CreateClient("Remote");
            if (!httpClient.DefaultRequestHeaders.Contains("Authorization") && !string.IsNullOrEmpty(AuthorizationToken))
            {
                httpClient.DefaultRequestHeaders.Add("Authorization", "Bearer " + AuthorizationToken);
            }
            return httpClient;
        }

        protected async Task GetAsync(string uri)
        {
            var response = await GetHttpClient().GetAsync(uri);
            CheckResponse(response);
        }

        protected async Task<string> GetStringAsync(string uri)
        {
            try
            {
                return await GetHttpClient().GetStringAsync(uri);
            }
            catch (Exception e)
            {
                Console.WriteLine(e);
            }

            return default;
        }

        protected async Task<byte[]> GetByteArrayAsync(string uri)
        {
            try
            {
                return await GetHttpClient().GetByteArrayAsync(uri);
            }
            catch (Exception e)
            {
                Console.WriteLine(e);
            }

            return default;
        }

        protected async Task<T> GetJsonAsync<T>(string uri)
        {
            var response = await GetHttpClient().GetAsync(uri, HttpCompletionOption.ResponseHeadersRead, CancellationToken.None);
            if (CheckResponse(response) && ValidateJsonContent(response.Content))
            {
                return await response.Content.ReadFromJsonAsync<T>();
            }

            return default;
        }

        protected async Task PutAsync(string uri)
        {
            var response = await GetHttpClient().PutAsync(uri, null);
            CheckResponse(response);
        }

        protected async Task<T> PutJsonAsync<T>(string uri, T value)
        {
            return await PutJsonAsync<T, T>(uri, value);
        }

        protected async Task<TResult> PutJsonAsync<TValue, TResult>(string uri, TValue value)
        {
            var response = await GetHttpClient().PutAsJsonAsync(uri, value);
            if (CheckResponse(response) && ValidateJsonContent(response.Content))
            {
                var result = await response.Content.ReadFromJsonAsync<TResult>();
                return result;
            }
            return default;
        }

        protected async Task PostAsync(string uri)
        {
            var response = await GetHttpClient().PostAsync(uri, null);
            CheckResponse(response);
        }

        protected async Task<T> PostJsonAsync<T>(string uri, T value)
        {
            return await PostJsonAsync<T, T>(uri, value);
        }

        protected async Task<TResult> PostJsonAsync<TValue, TResult>(string uri, TValue value)
        {
            var response = await GetHttpClient().PostAsJsonAsync(uri, value);
            if (CheckResponse(response) && ValidateJsonContent(response.Content))
            {
                var result = await response.Content.ReadFromJsonAsync<TResult>();
                return result;
            }

            return default;
        }

        protected async Task DeleteAsync(string uri)
        {
            var response = await GetHttpClient().DeleteAsync(uri);
            CheckResponse(response);
        }

        private bool CheckResponse(HttpResponseMessage response)
        {
            if (response.IsSuccessStatusCode) return true;
            if (response.StatusCode != HttpStatusCode.NoContent && response.StatusCode != HttpStatusCode.NotFound)
            {
                Console.WriteLine($"Request: {response.RequestMessage.RequestUri}");
                Console.WriteLine($"Response status: {response.StatusCode} {response.ReasonPhrase}");
            }

            return false;
        }

        private static bool ValidateJsonContent(HttpContent content)
        {
            var mediaType = content?.Headers.ContentType?.MediaType;
            return mediaType != null && mediaType.Equals("application/json", StringComparison.OrdinalIgnoreCase);
        }
    }
}
