using System.Net.Http.Headers;
using System.Text;
using HospitalContracts.ViewModels;
using Newtonsoft.Json;


namespace HospitalWeb
{
    public static class APIClient
    {
        private static readonly HttpClient _client = new();
        public static ApothecaryViewModel? Apothecary { get; set; } = null;
        public static void Connect(IConfiguration configuration)
        {
            _client.BaseAddress = new Uri(configuration["IPAddress"]);
            _client.DefaultRequestHeaders.Accept.Clear();
            _client.DefaultRequestHeaders.Accept.Add(new
           MediaTypeWithQualityHeaderValue("application/json"));
        }
        public static T? GetRequest<T>(string requestUrl)
        {
            var response = _client.GetAsync(requestUrl);
            var result = response.Result.Content.ReadAsStringAsync().Result;
            if (response.Result.IsSuccessStatusCode)
            {
                return JsonConvert.DeserializeObject<T>(result);
            }
            else
            {
                throw new Exception(result);
            }
        }
        public static void PostRequest<T>(string requestUrl, T model)
        {
            var json = JsonConvert.SerializeObject(model);
            var data = new StringContent(json, Encoding.UTF8, "application/json");
            var response = _client.PostAsync(requestUrl, data);
            var result = response.Result.Content.ReadAsStringAsync().Result;
            if (!response.Result.IsSuccessStatusCode)
            {
                throw new Exception(result);
            }
        }

        public static (Stream stream, string? contentType)? GetFileRequest<T>(string requestUrl, T model)
        {
            var json = JsonConvert.SerializeObject(model);
            var data = new StringContent(json, Encoding.UTF8, "application/json");
            var response = _client.PostAsync(requestUrl, data);
            
            var result = response.Result.Content.ReadAsStreamAsync().Result;
            response.Result.Content.Headers.TryGetValues("content-type", out var type);
            if (response.Result.IsSuccessStatusCode)
            {
                return (stream: result, contentType: type?.First());
            }

            else
            {
                throw new Exception($"Failed to retrieve file from {requestUrl}. StatusCode: {response.Result.StatusCode}");
            }
        }
    }
}